Checking and Filling 2023 Audi A5

Owner’s Manuals 2023 Checking and Filling

Checking and Filling

Fuel

Types of gasoline

The correct gasoline grade is stated on the inside of the fuel filler door.

The vehicle is equipped with a catalytic converter and must only be driven with unleaded gasoline. Audi recommends using TOP TIER Detergent Gasoline. For additional information on TOP TIER Detergent Gasoline, visit www.toptiergas.com.

The individual gasoline grades are differentiated by octane ratings. This value is given with (R#M)/2 equating to AKI or in RON. The headings below match the sticker in the fuel filler door (examples): UNLEADED FUEL ONLY MIN. (R+M)/2 87 Regular / MIN. RON 91 Regular

Use regular gasoline with minimum 87 AKI / 91 RON 20. Audi recommends using premium gasoline with minimum 91 AKI / 95 RON to achieve the rated horsepower and torque. UNLEADED FUEL ONLY PREMIUM MIN. (R+M)/2 91 / SUPER MIN. RON 95

Using premium gasoline with minimum 91 AKI / 95 RON is recommended. If premium gasoline is not available, you can also use regular gasoline 87 AKI / 91 RON. However this does reduce the engine power slightly. UNLEADED FUEL ONLY PREMIUM MIN. (R+M)/2 93 / SUPER PLUS MIN. RON 98 Using premium plus gasoline with at least 93 AKI / 98 RON is recommended.

If no premium plus gasoline is available, you can also use premium gasoline with 91 AKI/ 95 RON. However this does reduce the engine power slightly.

Filling the tank just one time with leaded fuel or other metallic additives will cause permanent deterioration to the catalytic converter function.

—When gasoline with an octane rating that is too low is used, high speeds or heavy engine load can lead to engine damage.

The vehicle may be filled with fuel that has a higher octane rating than what is required by the engine.

Gasoline mixture

Gasoline with alcohol (ethanol) You can fuel your vehicle with unleaded gasoline that has an ethanol content of up to 15%, for example “E15”. Gasoline adapted to the season Many gasoline fuels are adapted to the seasons. When the season changes, refueling at high-traffic gas stations is recommended. It is more likely that the gasoline will be suitable for the season there.

— Do not use gasoline that does not meet the specifications.

~Ethanol fuels with a high ethanol percentage, such as E30 - £100, must not be used. The fuel system will be damaged!

Methanol fuels with a high methanol percentage, such as M5 - M100, must not be used. The fuel system and the engine will be damaged!

~ Ifyou are unable to find out if a specific gasoline mixture meets the specifications, ask the gas station operator or their fuel supplier.

—Do not use any gasoline mixture whose composition cannot be identified.

~ Audi does not assume any responsibility for damage to the fuel system or for performance problems caused by using gasoline

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mixtures different from those specified. This type of damage also does not fall under the New Vehicle Limited Warranty or under the emissions control system warranty.

— If you notice a higher fuel consumption or poor handling or performance problems due to such gasoline mixtures, Audi recommends fueling with unblended gasoline.

Gasoline additives

An important issue for many automobile manufacturers is combustion residue in the engine that results from the use of certain fuels. Although types of gasoline differ depending on the manufacturer, there are similarities. Certain substances in the gasoline may cause deposits in the engine. Additives in the gasoline that should keep the engine and fuel system clean do not all function equally. Audi recommends using TOP TIER Detergent Gasoline. For additional information on TOP TIER Detergent Gasoline, visit www.toptiergas.com. If you use incorrect fuels over a long period of time, the maximum engine performance may be impaired by combustion residue.

— Damage or malfunctions caused by the use of incorrect types of gasoline are not covered by the New Vehicle Limited Warranty.

— Only gasoline additives that have been approved by Audi may be used.

Refueling Messages

The following messages may appear depending on the vehicle equipment: Messages If the FilJ indicator light appears with a corresponding message, refuel the vehicle. Ell tank system: malfunction! Please contact Service

There is a malfunction in the fuel tank system. Drive to an authorized Audi dealer or authorized Audi Service Facility immediately to have the malfunction corrected.

Fueling procedure

Fig. 161 Right rear side of the vehicle: opening the fuel filler door

Fig. 162 Fuel filler door with attached fuel cap

The fuel filler door is unlocked or locked by the central locking system. > Unlock the vehicle if necessary. » Press on the left side of the fuel filler door to open it © fig. 167.

» Unscrew the tank cap counterclockwise. » Place the cap from above on the open fuel filler door © fig. 162.

» Insert the fuel pump nozzle all the way into the fuel filler neck.

» Begin fueling. Once the fuel pump nozzle turns off the first time, the fuel tank is full. Do not continue fueling, or else the expansion space in the tank will be filled with fuel.

» After the fuel pump has switched off, wait five seconds before removing the nozzle to allow the rest of the fuel to finish dripping into the fuel tank.

Checking and Filling

» Turn the fuel cap clockwise until it clicks into place.

» Close the fuel filler door and then press on the left side until it latches.

The correct fuel ype for your vehicle can be found on a label located on the inside of the fuel filler door. For additional information on fuel, see > page 229. For the tank capacity in your vehicle, refer to the Technical Data page 304. To reduce the risk of fuel leaking out or vapors escaping, make sure that the fuel tank is closed correctly. Otherwise the [” indicator light will turn on.

Improper fueling procedures and improper handling of fuel can lead to explosions, fires, severe burns, and other injuries. ~Do not smoke. Keep away from open flames. — The ignition must be switched off when re-

fueling. Mobile devices, radio devices, and other ra-

dio equipment should always be switched off when refueling. Electromagnetic rays could cause sparks and start a fire.

~ If you do not insert the fuel pump nozzle all the way into the filler tube, then fuel can leak out. Spilled fuel can ignite and start a fire.

—Never get into the vehicle when refueling. If there is an exceptional situation where you: must enter the vehicle, close the door and touch a metal surface before touching the fuel pump nozzle again. This will reduce the risk of electrostatic discharge that can cause flying sparks. Sparks can start a fire when refueling.

Audi does not recommend transporting fuel containers inside the vehicle. Fuel could leak out of the container and ignite, especially dur-

D Depending on the engine and country

ing an accident. This can cause explosions, fires, and injuries. — Ifyou must transport fuel in a fuel contain-

er, note the following: — Always place the fuel container on the ground before filling. Never fill the fuel container with fuel while it is inside or on the vehicle. Electrostatic discharge can occur while refueling and the fuel vapors could ignite.

—When using fuel containers made of metal, the fuel pump nozzle must always remain in contact with the container to reduce the risk of static charge.

— Insert the fuel pump nozzle as far as possible into the filler opening while refueling.

— Follow the applicable legal regulations in the country where you are driving when using, storing and transporting fuel containers.

—Make sure that the fuel container meets the industry standards, for example ANSI or ASTM F852-86.

— Remove fuel that has overflowed onto any

vehicle components immediately to reduce the risk of damage to the vehicle.

= Never drive until the fuel tank is completely empty. The irregular supply of fuel that results from that can cause engine misfires. Uncombusted fuel may enter the exhaust system and increase the risk of damage to the catalytic converter.

— Do not overfill the fuel tank, or fuel could leak out when the vehicle is warming up.

—Fuel should never enter the sewer system or come into contact with the ground.

The fuel filler door on your vehicle does not lock if you lock the vehicle from the inside using the central locking switch.

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Fuel filler door emergency release » Seek help from a qualified person if you cannot open the fuel filler door.

» Afterward, drive to an authorized Audi dealer or authorized Audi Service Facility to have the malfunction repaired.

Emissions control system General information

The temperature of the exhaust system is high, both when driving and after stopping the engine. — Never touch the exhaust tail pipes once they

have become hot. This could result in burns. — Do not park your vehicle over flammable

materials such as grass or leaves because the high temperature of the emissions system could start a fire.

— Do not apply underbody protectant in the exhaust system area, because this increases the risk of fire.

Catalytic converter Observe the safety precautions > page 232, General information.

The vehicle may only be driven with unleaded gasoline, or the catalytic converter will be destroyed. Never drive until the tank is completely empty. The irregular supply of fuel that results from that can cause engine misfires. Uncombusted fuel could enter the exhaust system, which could cause overheating and damage to the catalytic converter.

Malfunction Indicator Lamp (MI

If the [J indicator light blinks or turns on, there is a malfunction related to emissions which can,

1) Depending on the engine and country

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for example, cause poor emissions quality and damage to the catalytic converter. Drive slowly to an authorized Audi dealer or authorized Audi Service Facility to have the malfunction corrected.

The indicator light can also turn on if the fuel filler cap is not closed correctly > page 230").

Engine compartment General information

Special care is required if you are working in the engine compartment

For work in the engine compartment, such as checking and filling fluids, there is a risk of injury, scalding, accidents, and burns. For this reason, follow all the warnings and general safety precautions provided in the following information. The vehicle's engine compartment is a dangerous area. > /\. Explanation of warning symbols:

Swi r Hot coolant - there is a risk of scalding!

A ~Turn the engine off. ~ Switch the ignition off. ~Set the parking brake. ~Select the “P” (Park) selector lever position.

Checking and Filling

~Allow the engine to cool. —Keep children away from the engine compartment.

—Never spill fluids on a hot engine. These fluids (such as the freeze protection contained in the coolant) can catch fire.

— Avoid short circuits in the electrical system. —Never reach into the radiator fan. The fan is temperature-controlled and can turn on suddenly, even when the ignition is switched off.

—Never open the hood when there is steam or coolant escaping from the engine compartment, because there is a risk that you could be burned. Wait until no steam or coolant is escaping.

—The cap on the coolant expansion tank must never be opened when the coolant is hot. The cooling system is under pressure. There isa risk of burns

~To protect your face, hands, and arms from hot steam or coolant, cover the cap with a thick cloth when opening.

— Do not remove the engine cover under any circumstances. This increases the risk of burns.

—Due to the risk of electric shock, never touch the ignition cable or other components in the electronic high-voltage ignition system when the engine is running or is starting.

—If a gear is engaged while the vehicle is stationary and the engine is running, do not press the accelerator pedal inadvertently. Pressing the accelerator pedal will cause the vehicle to move, and this could result in an accident.

~ If inspections or repairs must be performed while the engine is running, moving components (such as the ribbed belt, generator, and radiator fan) pose an additional risk. —Set the parking brake first and select the

“p" (Park) selector lever position. ~ Always make sure that no parts of the

body, jewelry, ties, loose clothing, and long hair can be caught in moving engine components. Before any work, always remove any jewelry and/or ties, tie back long hair, and make sure all clothing fits close

to the body to reduce the risk of anything becoming caught in engine components.

— Pay attention to the following warnings listed when work on the fuel system or on the electrical equipment is required. — Do not smoke. — Never work near open flames. — Always have a working fire extinguisher

nearby. ~All work on the battery or electrical system

in your vehicle can result in injuries, chemical burns, accidents, or burns. Because of this, all work must be performed only by an authorized Audi dealer or autho ized Audi Service Facility.

— Limit your exposure to exhaust and chemicals to as short a time as possible.

WARNING California Proposition 65 Warning: — Engine exhaust, some of its constituents,

and certain vehicle components contain or emit chemicals known to the State of California to cause cancer and birth defects and reproductive harm. In addition, certain fluids contained in vehicles and certain products of component wear contain or emit chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

— Battery posts, terminals and related accessories contain lead and lead compounds, chemicals known to the State of California to cause cancer and reproductive harms. Wash hands after handling.

©) Note When filling fluids, be sure not to add any fluids to the wrong reservoirs. Otherwise severe malfunctions and engine damage will occur.

@) For the sake of the environment You should regularly check the ground under your vehicle in order to detect leaks quickly. If there are visible spots from oil or other fluids,

Checking and Filling

bring your vehicle to an authorized Audi dealer or authorized Audi Service Facility to be checked.

Opening and closing the hood The hood is released from inside the vehicle.

Fig. 164 Unlocked hood: lever

Observe the safety precautions > page 232, General information. Make sure the wiper arms are not raised up from the windshield. Otherwise the paint could be damaged. Opening the hood » With the door open, pull the lever =>”) below

the instrument panel in the direction of the arrow > fig. 163.

1) The &=> symbol is not available in all countries.

» Raise the hood slightly > A\. » Press the lever fig. 164 in the direction of the arrow. This releases the hooks.

» Open the hood. Closing the hood » Push the hood down until you override the

force of the struts. » Let the hood fall lightly into the latch. Do not press it in. > J\.

Messages The following messages may appear depending on the vehicle equipment: i warning! Hood is not locked. Stop vehicle and check the lock The hood latch is not locked correctly. Stop immediately and close the hood.

— Never open the hood when there is steam or coolant escaping from the engine compart: ment, because there is a risk that you could be burned. Wait until no steam or coolant is escaping.

~For safety reasons, the hood must always be latched securely while driving. Because of this, always check the hood after closing it to make sure it is latched correctly. The hood is latched if the front corners cannot be lifted.

— If you notice that the hood is not latched while you are driving, stop immediately and close it, because driving when the hood is. not latched increases the risk of an accident.

Checking and Filling

The most important check points.

Fig. 165 Engine compartment overview: diagram

Observe the safety precautions © page 232, General information @ Washer fluid reservoir () > page 246 @® Jump start points: (+) under the cover

The coolant expansion tank and the engine oil filling opening may be located in different places within the engine compartment, depending on the engine version.

Engine oil

Fig. 166 Engine oil sticker

—@ Engine oil viscosity -@ Engine oil standard If you need to add engine oil, use an oil that meets the engine oil standard listed on the sticker fig. 166. The sticker with the specified standard is located in the front of the engine compartment © page 235, fig. 165. When using >

Checking and Filling

the specified engine oil, you can adjust the oil level as often as needed. If engine oil that meets the recommended specification is not available, in an emergency you may add a maximum of 0.5 quart (0.5 liter) engine oil of the that meets the following different standard one time until the next regular oil change. — Standard VW S04 00, ACEA C3, ACEA C4,

API SP or ILSAC GF-6A. All viscosity classes within these standards are permitted.

Audi recommends having the oil changed by an authorized Audi dealer or authorized Audi Service Facility.

Audi recommends using approved engine oil that meets the respective VW standard. Using engine oils which do not meet these quality standards can cause damage to the engine. As. an exception and only in an emergency, 0.5 qt (0.5 0) of engine oil that differs from the standards listed may be used.

Audi recommends using engine oils provided by Audi Genuine Parts.

Messages The following messages may appear depending on the vehicle equipment: Hii turn off engine. Oil pressure too low Stop driving and switch the engine off. Check the engine oil level > page 237. = If the engine oil level is too low, add engine oil

~ If the engine oil level is correct and the indicator light still turns on, turn the engine off and do not continue driving. See an authorized Audi dealer or authorized Audi Service Facility for assistance.

Applies to: vehicles with ol level warning EiiPlease add oil immediately.

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Stop driving and switch the engine off. Check the engine oil level = page 237 and add engine oil immediately > page 238. Eladd max. x qt (xl) oil. You can continue driving Add the amount of oil shown immediately © page 238.

EX Please reduce oil level There is too much oil in the engine and there is a risk of damaging the catalytic converter or engine. Drive to an authorized Audi dealer or authorized Audi Service Facility immediately to have engine oil extracted if necessary. Avoid high engine speeds, full acceleration, and heavy engine loads. EZ oil tevel sensor: oil change necessary. Please contact Service

Fuel has entered the engine oil. This will cause the engine oil level to rise slowly and the engine oil quality to decrease. Do not extract engine oil to reduce the level, because this will increase the risk of engine damage. Drive to an authorized Audi dealer or authorized Audi Service Facility immediately to have engine oil extracted.

EZ oil tevel system: malfunction! Please contact Service

The sensor that checks the engine oil level has malfunctioned. Drive immediately to an authorized Audi dealer or authorized Audi Service Facility to have the malfunction repaired. Boil pressure sensor: malfunction! Please contact Service

The sensor that checks the engine oil pressure has malfunctioned. Drive immediately to an authorized Audi dealer or authorized Audi Service Facility to have the malfunction repaired. [iPlease drive to warm up engine Especially low outside temperatures are a main reason why fuel may get into the engine oil. The fuel can only evaporate from the engine oil if the engine oil temperature is high enough.

Drive in the “S” gear.

Checking and Filling

Drive the engine at higher RPMs while avoiding full acceleration. You should drive for at least 30 minutes. The indicator light may not turn off during this time. Repeat the steps that are described at any time. Have an authorized Audi dealer or authorized Audi Service Facility repair the malfunction if the indicator light does not turn off after a few drives.

When the message [fj Please drive to warm up engine appears, adjust your speed according to the weather, road, terrain, and traffic conditions. You should never disobey the traffic laws applicable in the country in which you are driving in order to follow driving recommendations. The oil pressure warning [gq is not an oil level indicator. Always check the oil level regularly.

Checking the engine oil level The engine oil level can be checked in the MMI.

Observe the safety precautions ~ page 232, General information. » Park the vehicle on a level surface. » Shut the engine off when it is warm. » Switch only the ignition back on. > Wait approximately five minutes so that the en-

gine oil can flow back into the engine oil pan. » Applies to MMI: Select on the home screen: VE~ HICLE > Settings & Service > Oil level.

» Read the oil level in the display. Add engine oil if the bar in the oil level indicator is just below “min” © page 238.

If the engine oil level is too low or too high, there is a risk of engine damage.

The oil level indicator in the display is only an informational display. If the oil level is too

low, a minimum oil warning appears in the instrument cluster. Add oil and close the hood. The current oil level will be displayed on the MMI the next time the ignition is switched on.

The engine oil consumption may be up to 0.5 quart/600 miles (0.5 liter/1,000 km), depending on driving style and operating conditions. In RS models, the oil consumption may be up to 0.8 qt/600 mi (0.8 L/1,000 km). Consumption may be higher during the first 3,000 miles (5,000 km). The engine oil level must be checked regularly. It is best to check each time you refuel your vehicle and before long drives. — Because of the lubrication and cooling o

the engine, combustion engines consume oil. The oil consumption varies depending on the engine and may change during the service life of the engine. Engines generally consume more oil at the beginning during the break-in period. Then oil consumption stabilizes after the break-in period.

— Under normal conditions, oil consumption depends on the quality and viscosity of the oil, the engine RPM, the climate conditions, and the road conditions. The dilution of oil from condensation or fuel residue as well as the age of the oil also play a role. Because engine wear increases with mileage, oil consumption will increase again over time until it may be necessary to replace worn components.

— Because all these variables play a role, itis not possible to define an oil consumption standard. Therefore, the oil level must be checked regularly.

— If you believe that your engine has increased its oil consumption, contact an authorized Audi dealer or authorized Audi Service Facility to determine the cause. Please note that an exact oil consumption measurement must be done with the necessary care and accuracy and may take time. An authorized Audi dealer or authorized Audi Service FaCility is trained in accurately measuring the oil consumption.

Checking and Filling

= You can find information on engine oil and engine oil capacities for the USA at www. audiusa.com/help/maintenance, or for Canada at www.audi.ca/ca/web/en/ customer-area/care-and-maintenance/ audi-service-schedules.html, or call 800-822-2834.

Fig. 167 Engine compartment: engine oil filling opening cover (example)

Observe the safety precautions > page 232, General information. » Turn the engine off. > Open the hood © page 234. » Unscrew the cap %7: for the engine oil filler opening © fig. 167.

» Carefully add 0.5 quart (0.5 liter) of the correct oil > page 235.

» Close the engine oil filler opening cap. » Close the hood ® page 234. » Restart the ignition after two minutes and check the current oil level in the MMI © page 237, Checking the engine oil level.

» Applies to: using engine oil that meets the recommended specification: Add some more engine oil again if necessary.

—When adding oil, do not let oil drip onto hot engine components. This increases the risk ofa fire.

~ You must close the cap on the oil filler opening correctly so that oil does not leak out onto the hot engine and exhaust system when the engine is running, because this is a fire hazard.

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— Always clean skin thoroughly if it comes into contact with engine oil.

~ Engine oil is poisonous and must be kept out of reach of children.

— Store the engine oil securely in the original container.

ly meets the Audi oil quality standard for your vehicle. Using another oil may cause severe vehicle damage.

— Do not mix any additives with the engine oil. Additives may cause engine damage that is not covered by your New Vehicle Limited Warranty.

= Oil should never enter the sewer system or come into contact with the ground.

—Follow the legal regulations in the country where you are located when disposing of empty oil containers.

Changing engine oil Audi recommends having the oil changed at an authorized Audi dealer or authorized Audi Service Facility. Observe the safety precautions > page 232, General information. The engine oil must be changed at the intervals specified in the Warranty & Maintenance Booklet. This is very important because the lubrication function of the oil gradually declines during regular vehicle operation. The engine oil should be changed more frequently under certain circumstances. Have the oil changed more frequently if you often drive short distances, your vehicle is predominantly in stopand-go traffic situations, is in very dusty environments, or is operated for long periods of time in temperatures below zero. Cleansing additives in the oil make fresh oil appear darker after the engine has run briefly. This >

Checking and Filling

is normal and no reason to change the engine oil more frequently than recommended. Because correctly disposing of engine oil is difficult and special tools and technical knowledge are needed for an oil change, Audi recommends having your engine oil changed by an authorized Audi dealer or authorized Audi Service Facility. If you change the engine oil yourself, please note the following important information:

If you change the engine oil on the vehicle yourself, the following precautions must be followed: — Wear protective eyewear. —Due to the risk of scalding, allow the engine

to cool down sufficiently. = Maintain enough distance when you are removing the oil drain plug. While doing this, keep your forearm parallel to the ground to reduce the risk of hot oil dripping down your arm.

— Drain the oil into a container designed for this purpose that is large enough to hold the full amount of oil in your engine.

— Engine oil is poisonous. Always store out of. reach of children.

— Prolonged contact of used engine oil with the skin may cause skin damage. Always wash oil off immediately with soap and water to protect your skin.

Do not mix any additives with the engine oil. Additives may cause engine damage that is not covered by your New Vehicle Limited Warranty.

— Before changing the engine oil, make sure you can dispose of the used engine oil correctly.

= Engine oil must always be disposed of correctly. Do not dump it in the yard, in the forest, or in open water, river channels, or sewers.

~ Have your used engine oil recycled by bringing it to a used oil collection site or contact a gas station.

Cooling system

The engine cooling system is filled with a mixture of purified water and coolant additive at the factory. This coolant must not be not changed. The coolant level is monitored using the [fi indicator light. However, you should occasionally check the coolant level. Messages The following messages may appear depending on the vehicle equipment: Bil turn off engine and check coolant level. See owner's manual The coolant level is too low.

Do not continue driving and switch the ignition off. Check the coolant level ® page 240. — If the coolant level is too low, add coolant

Bi coolant temperature: too high. Please let engine run while vehicle is stationary Let the engine run at idle for a few minutes to cool off, until the indicator light turns off. If the indicator light does not turn off, do not

continue driving the vehicle. See an authorized Audi dealer or authorized Audi Service Facility for assistance.

Bi coolant system: malfunction! Please turn off engine Do not continue driving, shut the engine off, and switch the ignition off. See an authorized Audi dealer or authorized Audi Service Facility for assistance.

Coolant additive

The coolant additive is made of anti-freezing and corrosion protection agents. Only add the

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following coolant additives mixed with distilled water. | Gi2evo TL774L The amount of coolant additive that needs to be mixed with water depends on the climate where the vehicle will be operated. If the coolant additive percentage is too low, the coolant can freeze and damage the engine.

Warm min. 40% min. -13 °F regions max. 45% —— |(-25°C) Cold min. 50% max. -40 °F regions | max. 55% (-40 °C) — Before the start of winter, have an author-

ized Audi dealer or authorized Audi Service Facility check if the coolant additive in your vehicle matches the percentage appropriate for the climate. This is especially important when driving in colder climates.

— If the G12evo coolant additive is not available in an emergency, do not add any other additive. You could damage the engine. If this happens, only use distilled water and restore the correct mixture ratio with the specified coolant additive as soon as possible.

— Only refill with new coolant. — Radiator sealant must not be mixed with

the coolant. —You can continue driving if the permitted G12evo coolant additive was not added. However, go to an authorized Audi dealer or authorized Audi Service Fa mediately to have the coolant replaced to reduce the risk of engine damage.

— Due to the risk of engine damage, the cooling system should only be refilled by an authorized Audi dealer or authorized Audi Service Facility. An authorized Audi dealer or authorized Audi Service Facility can also provide you with important information about the recommended coolant additive.

Checking coola

Fig. 168 Engine compartment - Coolant expansion tank (diagram): @ cover with release button; @) markings

Observe the safety precautions © page 232, General information. Checking the coolant level » Park the vehicle on a level surface. » Switch the ignition off. » Open the hood > page 234. The coolant expansion tank for some engines is located in the water drip tray under a cover. If necessary, remove the cover that is located under the windshield wiper on the front passenger's side. > Check the coolant level in the coolant expan-

sion tank © page 235, fig. 165 using the outer markings @ > fig. 168. The coolant level must be between the markings @) when the engine is cold. When the engine is warm it can be slightly above the upper marking.

» Applies to: vehicles with 6-cylinder engine: There is a float located in the coolant expansion tank. Read the coolant level using the coolant level float. When the engine is cold, the float must be located between the MIN marking and the edge of the filler opening on the coolant expansion tank.

> When you add coolant to the expansion tank, please refer to > page 239, Cooling system.

Adding coolant Requirement: there must be a residual amount of coolant in the expansion tank >@). If you must add coolant, use a mixture of water and coolant additive. Audi recommends mixing the coolant additive with distilled water. >

Checking and Filling

» Allow the engine to cool. » Place a large, thick towel on the coolant expan-

sion tank cap. » Push the release button @) © fig. 168 on the

cap and carefully turn it to the left until you feel resistance > /\.

» Push the release button again and remove the cap completely.

> Add coolant in the correct mixture ratio © page 239 up to the MAX marking. Or, in vehicles with a 6-cylinder gasoline engine, the float must be located between the MIN marking and the edge of the filler opening on the coolant expansion tank.

» Make sure that the fluid level remains stable. ‘Add more coolant if necessary.

» Vehicles with 6-cylinder engine: if necessary, press the float into the coolant expansion tank using the cover.

» Turn the cap to the right to tighten it until you feel resistance a second time.

Coolant loss usually indicates that there is a leak. Immediately drive your vehicle to an authorized Audi dealer or authorized Audi Service Facility and have the cooling system inspected. If the cooling system is not leaking, coolant loss can result from the coolant boiling due overheating and then being forced out of the cooling system.

— The engine compartment in any vehicle potentially dangerous area. Stop the engine, switch the ignition off, and allow the engine to cool before working in the engine compartment. Always follow the information found in page 232, General information.

— Never open the hood if you can see or hear steam or coolant escaping from the engine compartment. This increases the risk of burns. The cooling system is under pressure. When you no longer see or hear steam or coolant escaping, you may open the engine compartment with caution.

—When working in the engine compartment, remember that the radiator fan can switch on even if the ignition is switched off, which increases the risk of injury.

= Coolant additive and coolant can be dangerous to your health. For this reason, store the coolant in the original container and away from children. There is a risk of poisoning.

Do not continue driving if the coolant expansion tank is empty. Do not add any coolant, because air could enter the cooling system and damage the engine. See an authorized Audi dealer or authorized Audi Service Facility for assistance.

Brake fluid

Fig. 169 Engine compartment: cap on brake fluid reservoir

Observe the safety precautions ® page 232, General information. Checking the brake fluid level

The brake fluid reservoir is located under a cover on the driver's side.

» Park the vehicle on a level surface. » Lift the cover > page 235, fig. 165 at both

‘openings and remove it. » Read the brake fluid level on the brake fluid

reservoir > page 235, fig. 165. The brake fluid level must be between the MIN and MAX markings? A\.

The brake fluid level is monitored automatically. Messages The following messages may appear depending on the vehicle equipment: (UG / Bi Brakes: stop vehicle and check brake fluid level >

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Stop the vehicle and check the brake fluid level. See an authorized Audi dealer or authorized Audi Service Facility for assistance. Changing the brake fluid Brake fluid should be changed at regular intervals. Have the brake fluid changed by an authorized Audi dealer or authorized Audi Service Facility. The authorized Audi dealer or autho ized Audi Service Facility will inform you of the replacement intervals.

= If the brake fluid level is below the MIN marking, it can impair the braking effect and driving safety, which increase the risk of an accident. Do not continue driving. See an authorized Audi dealer or authorized Audi Service Facility for assistance.

= If the brake fluid is old, bubbles may form in the brake system during heavy braking. This could impair braking performance and driving safety, which increases the risk of an accident.

= The brake fluid in your vehicle must meet the standard VW 501 14 and is available at an authorized Audi dealer or authorized Audi Service Facility. If this brake fluid is not available, another high-grade brake fluid of equivalent quality may be used, and it must meet the U.S. Federal Motor Vehicle Standard (FMVSS) 116 DOT 4, Class 6.

= Reusing brake fluid or using brake fluid that is not permitted for your vehicle will significantly impair the braking performance and can even lead to a failure of the brake system. The manufacturer of the vehicle is not liable for failures or damage resulting from this. It will also not be covered by the warranty.

= If the brake fluid level is above the MAX marking, brake fluid may leak out over the edge of the reservoir and result in damage to the vehicle.

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= Do not allow any brake fluid to come into contact with the vehicle paint, because it will corrode the paint.

Electrical system The following messages may appear depending on the vehicle equipment: 1f the [i / FE or fi] indicator light turns on, there is a malfunction in the power supply, the battery, or the vehicle electrical system. BB BEtectrical system: malfunction! Safely stop vehicle Safely stop your vehicle, do not continue driving and switch the ignition off A\. See an authorized Audi dealer or authorized Audi Service Facility for assistance. Electrical system: malfunction! Restart not possible. Please contact Servi

If you switch the ignition off, you will not be able to restart the vehicle. Vehicle functions or driving stability may be limited. Drive to an authorized Audi dealer or authorized Audi Service Facility immediately. BB electrical system: malfunction! Please contact Service

Switch off all electrical equipment that is not needed. If necessary, some equipment will be switched off automatically. Vehicle functions or driving stability may be limited. Drive to an authorized Audi dealer or authorized Audi Service Facility immediately. Electrical system: low battery charge. Battery will be charged while driving The starting ability may be impaired. ~ If this message turns off after a little while, the

vehicle battery has charged enough while driving.

— If the message does not turn off, drive immediately to an authorized Audi dealer or authorized Audi Service Facility to have the malfunction repaired. >

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When there is an electrical system malfunction, vehicle functions may not work and driving stability may be limited, which increases the risk of an accident. Do not continue driving and switch the ignition off. See an authorized Audi dealer or authorized Audi Service Facility for assistance.

Battery Battery general information Because of the complex power supply, all work on batteries such as disconnecting, replacing, etc., should only be performed by an authorized Audi dealer or authorized Audi Service Facility eh. Multiple batteries with different technologies may be installed in your vehicle: ~Vehicle battery (for example, for starting the

~ Auxiliary battery (for example, for recuperation or optional equipment) * page 244, Safety precautions

Not running the vehicle for long periods of time

The battery will gradually drain if the vehicle does not run for long periods of time. To ensure that the vehicle can still be started, the electrical equipment will be limited or switched off. Some convenience functions, such as interior lighting or power seat adjustment, may not be available under certain circumstances. The convenience functions will be available again when you start, the engine. Even when electrical equipment is switched off, the equipment can still drain the battery if the vehicle is not driven for long periods of time. Deep draining results in a chemical reaction that destroys the inside of the battery. The battery must be charged every month to prevent this page 245. Contact an authorized Audi dealer or authorized Audi Service Facility for more information.

Winter operation Cold weather places an especially high load on the 12 volt vehicle battery. Have the battery checked by an authorized Audi dealer or authorized Audi Service Facility before cold weather begins. Replacing the battery Applies to: 12 volt vehicle battery All work on the battery must only be performed by an authorized Audi dealer or authorized Audi Service Facility. The 12 volt vehicle battery was developed based on the installation location and is equipped with safety features. If a 12 volt vehicle battery must be replaced, ask your authorized Audi dealer or authorized Audi Service Facility about the electromagnetic compatibility, size, and the necessary maintenance, power, and safety standards for the new 12 volt vehicle battery. The battery vent of the 12 volt vehicle battery must always be on the negative terminal side. The battery vent on the positive terminal side must always be closed. When replacing the 12 volt lead-acid vehicle battery, only use a maintenance-free 12 volt leadacid battery that conforms to the TL 825 06 and VW 7 50 73 standards. These standards must be from October 2014 or newer.

~All work on the battery or electrical system in your vehicle can result in injuries, chemical burns, accidents, or burns. Because of this, all work must be performed only by an authorized Audi dealer or authorized Audi Service Facility.

— Always have an authorized Audi dealer or authorized Audi Service Facility replace the 12 volt vehicle battery, because and adaptation must be performed on the vehicle electrical system when the battery is replaced. Only an authorized Audi dealer or authorized Audi Service Facility has the necessary technology to perform the adaption correctly. Otherwise, there could be a loss of safety-related functions among other things, which increases the risk of an accident.

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= Never connect a charging cable or jump

start cable directly to the 12 volt vehicle battery. Only use the connections in the engine compartment > page 245.

California Proposition 65 Warning: ~ Battery posts, terminals and related acces-

sories contain lead and lead compounds, chemicals known to the State of California to cause cancer and reproductive harms. Wash hands after handling.

dealer or authorized Audi Service Facility for more information.

Safety precautions

Explanation of warning symbols:

— Using unsuitable batteries may void the ve‘All work on the batteries must only be perhicle’s operating license. formed by an authorized Audi dealer or au-

thorized Audi Service Facility.

(@ Forthe ake oF the environment case that escape fom these batteries can Batteries must be disposed of using be poisonous or flammable.

methods that will not harm the environment. —The contents of these batteries can be corroDo not dispose of them in household trash. sive. If any battery contents come into conThey contain harmful substances and recyclatact with the skin, flush the affected area for ble raw materials. Contact an authorized Audi at least 15 minutes with clean water. Then 244

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wash the affected area with soap. Have the affected area examined by a medical professional.

— Components must not be connected to the battery terminals and wires on the 48 volt battery because this increases the risk of damage, for example due to overvoltage.

— Have maintenance work performed only by trained personnel.

— Have the 48 volt lithium battery replaced only by an authorized Audi dealer or authorized Audi Service Facility. Audi recommends an authorized Audi dealer or authorized Audi Service Facility, because these locations have trained personnel and the required parts and tools.

— Never try to replace the 48 volt lithium battery yourself. The 48 volt lithium battery in this vehicle may only be replaced with a 48 volt lithium battery designed by Audi specifically for this vehicle. Using other 48 volt lithium or lead batteries will result in considerable malfunctions or even total failure of the electrical system.

— Never make modifications to the lithium battery.

— Never open the 48 volt battery.

Charging the 12 volt vehicle battery

Fig. 170 Engine compartment: connectors for a charger or jump start cables

Observe the safety precautions > page 232, General information, + A\ in Battery general information on page 243 and > /\.

Requirement: only use chargers with a maximum charging current of 14.8 volts. The battery cables remain connected. The charging cable connections are located in the engine compartment. The ground point ©)is always located on the vehicle body.

> Switch off the ignition and all electrical equipment.

> Insert the power cable for the charger into the socket and switch the charger on.

» At the end of the charging process, switch the charger off and pull the power cable out of the socket.

ZA warning — Never connect a charging cable or jump

start cable directly to the 12 volt vehicle battery. Only use the connections in the engine compartment * page 245.

~Ahighly explosive mixture of gases can form when charging batteries. Only charge the battery in well-ventilated areas.

—A drained battery can freeze at temperatures around 32 °F (0 °C). Do not charge or use a frozen or thawed battery. If ice forms, the battery housing can crack and battery electrolyte fluid can leak, which increases the risk of an explosion and chemical burns. Contact an authorized Audi dealer or authorized Audi Service Facility for more information.

= Do not connect or disconnect the charging cable while charging because this increases the risk of an explosion.

G) Tips Read all of the manufacturer's instructions for the charger before charging the battery.

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Windshield washer system

Fig. 171 Engine compartment: washer fluid reservoir cap

Observe the safety precautions * page 232, General information. The windshield washer fluid reservoir & contains the cleaning solution for the windshield and the headlight washer sys em* © fig. 177,

© page 235. The reservoir capacity can be found in page 304. To reduce the risk of lime scale deposits on the spray nozzles, use clean water with low amounts of calcium. Always add window cleaner to the water. When the outside temperatures are cold, an anti-freezing agent should be added to the water so that it does not freeze.

Messages The following messages may appear depending on the vehicle equipment: EPlease add washer fluid Fill the washer fluid for the windshield washer system and the headlight washer system* when the ignition is switched off.

= The concentration of anti-freezing agent must be adjusted to the vehicle operating conditions and the climate. A concentration that is too high can lead to vehicle damage.

— Never add radiator anti-freeze or other additives to the washer fluid.

= Do not use a glass cleaner that contains paint solvents, because this could damage the paint.

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Service interval display The service interval display detects when your vehicle is due for service. The service interval display works in two stages: — Inspection or oil change reminder: after driv-

ing a certain distance, a message will appear in the instrument cluster display each time the ignition is switched on or off, depending on the vehicle equipment. The remaining distance or time is displayed briefly.

~ Inspection or oil change due: if your vehicle has reached an inspection or oil change interval, or both intervals at the same time, the message Inspection due! or Oil change due! or Oil change and inspection due! appears briefly after switching the ignition on or off.

Checking service intervals You can check the remaining distance or time until the next oil change or next inspection in the Infotainment system. Applies to MMI: Select on the home screen: VEHICLE > Settings & Service > Service intervals.

Resetting the indicator An authorized Audi dealer or authorized Audi Service Facility will reset the service interval display after performing service. If you have changed the oil yourself, you must reset the oil change interval. Applies to: MMI: To reset the display, select on the home screen: VEHICLE > Settings & Service > Service intervals.

Inadequate service, a lack of service, or failing to adhere to the service intervals can result in the vehicle breaking down in traffic, accidents, and serious injuries.

— Only reset the oil change indicator if the oil was changed.

— Regular service work on the vehicle is not only beneficial for the sustainable use and

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retention of the vehicle value, but also for the operational and traffic safety. For this reason, always have service work performed according to the Audi guidelines.

— Even if the mileage on the vehicle is low, do not exceed the time for the next service.

— Audi is not responsible for damage to the vehicle that occurred due to inadequate service or insufficient part availability.

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2023 Audi A5 Owners Manual - Checking and Filling

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