Wheels and tire
Vehicle features and options
This chapter describes model-specific equipment, systems, and functions that are currently available, or may become available in the future, even if they are not present in the vehicle.
Additional information:
Vehicle equipment.
Tire pressure
General information
The tire condition and tire pressure influence the following:
The service life of the tires.
Driving safety.
Driving comfort.
Fuel consumption.
Safety information
Checking the tire pressure regularly
Tire pressure specifications
In the tire pressure table
The tire inflation pressure table contains all tire inflation pressure specifications for the specified tire sizes at the ambient temperature. Tire pressure values are given in the printed Owner's Manual and apply to the tire sizes approved by the vehicle manufacturer for the corresponding vehicle types.
To identify the correct tire inflation pressure, please note the following:
Tire sizes of the vehicle.
Maximum speed for driving.
On the control display
The current tire inflation pressure values for the mounted tires can be displayed on the control display.
The current tire inflation pressure value is located on each tire.
Checking the tire pressure
General information
The tires heat up while driving. The tire pressure increases with the tire temperature.
Tires have a natural, consistent tire pressure loss.
The displays of inflation devices may under-read by up to 0.1 bar/2 psi.
Checking via tire inflation pressure specifications in tire pressure table
Determine the intended tire inflation pressure levels for the mounted tires.
Check the tire inflation pressure in all four tires, using a pressure gage, for example.
Correct the tire inflation pressure if the actual tire inflation pressure deviates from the intended tire inflation pressure.
Make sure that all valve caps are screwed onto the tire valves.
The tire inflation pressure specifications in the tire inflation pressure table only relate to cold tires or tires at the same temperature as the ambient temperature.
Only check the tire inflation pressure levels when the tires are cold, i.e.:
A distance traveled of max. 1.25 miles/2 km has not been exceeded.
If the vehicle has not moved again for at least two hours after a trip.
If equipped with an emergency wheel: check the tire pressure of the emergency wheel in the cargo area regularly and correct if necessary.
Checking using the tire inflation pressure specifications on the control display
Apps menu
"Vehicle"
"Vehicle status"
"Tire Pressure Monitor"
Check whether the current tire inflation pressure levels deviate from the intended tire pressure value.
Correct the tire inflation pressure if the actual tire inflation pressure deviates from the intended tire inflation pressure.
The display of current tire pressure on the control display may be restricted when the vehicle is stationary. After a short drive, the tire pressure is updated.
After correcting the tire pressure
If equipped with a Tire Pressure Monitor, the corrected tire pressures are applied automatically. Make sure that the tire settings are correct. With tires that cannot be found in the tire pressure values on the control display, reset the Tire Pressure Monitor (TPM).
If equipped with a flat tire monitor, reinitialize the flat tire monitor.
Tire inflation pressures up to 100 mph/160 km/h
For speeds of up to 100 mph/160 km/h and for optimum driving comfort, note the tire pressure values in the printed Owner's Manual and adjust as necessary.
The tire inflation pressure specifications can also be found on the tire pressure label on the driver's door pillar.
Do not exceed a speed of 100 mph/160 km/h.
Tire inflation pressures at maximum speeds above 100 mph/160 km/h
Speeds above 100 mph/160 km/h
For speeds over 100 mph/160 km/h and for optimum driving comfort, note the tire pressure values in the printed Owner's Manual and adjust as necessary.
Tire marking
Tire size
245/45 R 18 96 Y
245: nominal width in mm
45: cross-sectional relationship in %
R: radial tire code
18: rim diameter in inches
96: load bearing capacity
Y: speed code letter
ZR tires: reinforced radial tire for speeds exceeding 150 mph/240 km/h
Maximum tire load
Maximum tire load is the maximum permissible weight for which the tire is approved.
Locate the maximum tire load on the tire sidewall and the Gross Axle Weight Rating – GAWR – on the certification label on the driver door B-pillar. Divide the tire load by 1.1. It must be greater than one-half of the vehicle’s Gross Axle Weight Rating – GAWR. Note, front vs. rear GAWR and tire loads, respectively.
Speed letter
|
Designation |
Maximum speed |
|---|---|
|
Q |
up to 100 mph/160 km/h |
|
R |
up to 106 mph/170 km/h |
|
S |
up to 112 mph/180 km/h |
|
T |
up to 118 mph/190 km/h |
|
H |
up to 131 mph/210 km/h |
|
V |
up to 150 mph/240 km/h |
|
W |
up to 167 mph/270 km/h |
|
Y |
up to 186 mph/300 km/h |
|
(Y) |
above 186 mph/300 km/h |
Tire Identification Number
DOT Code: DOT xxxx xxx 1923
xxxx: manufacturer code for the tire brand
xxx: tire size and tire design
1923: tire age
Tires with DOT codes meet the guidelines of the U.S. Department of Transportation.
Tire age
Recommendation
Regardless of the tire tread depth, replace tires at least every 6 years.
Production date
You can find the tire production date on the tire sidewall.
|
Designation |
Production date |
|---|---|
|
DOT … 1923 |
19th week of 2023 |
Uniform Tire Quality Grading
Quality grades can be found where applicable on the tire sidewall between tread shoulder and maximum section width.
E.g.: Treadwear 200; Traction AA; Temperature A
DOT Quality Grades
Treadwear
Traction AA A B C
Temperature A B C
All passenger vehicle tires must conform to Federal Safety Requirements in addition to these grades.
Treadwear
The treadwear grade is a comparative rating based on the wear rate of the tire when tested under controlled conditions on a specified government test course. E.g., a tire graded 150 would wear one and one-half, 1 g, times as well on the government course as a tire graded 100. The relative performance of tires depends upon the actual conditions of their use, however, and may depart significantly from the norm due to variations in driving habits, service practices and differences in road characteristics and climate.
Traction
The traction grades, from highest to lowest, are AA, A, B, and C.
Those grades represent the tire's ability to stop on wet pavement as measured under controlled conditions on specified government test surfaces of asphalt and concrete. A tire marked C may have poor traction performance.
The traction grade assigned to this tire is based on straight-ahead braking traction tests, and does not include acceleration, cornering, hydroplaning, or peak traction characteristics.
Temperature
The temperature grades are A, the highest, B, and C, representing the tire's resistance to the generation of heat and its ability to dissipate heat when tested under controlled conditions on a specified indoor laboratory test wheel. Sustained high temperature can cause the material of the tire to degenerate and reduce tire life, and excessive temperature can lead to sudden tire failure. The grade C corresponds to a level of performance which all passenger car tires must meet under the Federal Motor Vehicle Safety Standard No. 109. Grades Band A represent higher levels of performance on the laboratory test wheel than the minimum required by law.
Temperature grade for this tire
M+S
Winter tires, as well as all-season tires with better winter performance than summer tires, can be identified by the M+S marking on the tire side wall.
Tire tread
Safety information
Ensure that the tire tread depth is not fallen short of
Minimum tread depth
The tire manufacturer’s wear indicators are distributed over the tire circumference. These indicators have a height of min. 0.06 in/1.6 mm and serve as an indicator for tire tread wear.
The positions of the wear indicators are marked on the tire sidewall with TWI, Tread Wear Indicator.
Tire damage
General information
Check your tires regularly for damage, foreign bodies lodged in the tread, and tread wear.
Indications of tire damage or another vehicle malfunction:
Unusual vibrations.
Unusual tire or running noises.
Unusual handling such as a strong tendency to pull to the left or right.
Uneven wear pattern, e.g., increased wear in the area of the tire shoulder.
Damage can be caused by the following situations, for instance:
Driving over curbs.
Road damage.
Tire pressure too low.
Vehicle overloading.
Incorrect tire storage.
Safety information
Observe with tire damage
Drive around obstacles where possible
Exchanging wheels and tires
Mounting and wheel balancing
Have the wheel mounted and balanced by an authorized service center or another qualified service center or repair shop.
Suitable wheels and tires
General information
Only certain wheel/tire combinations are suitable depending on vehicle and equipment. The vehicle manufacturer determines wheel/tire combinations on the basis of the following criteria:
Tire size, e.g., tire width, aspect ratio.
Wheel size, e.g., rim diameter, offset.
Ask an authorized service center or another qualified service center or repair shop about wheels and tires that are suitable for the vehicle as well as special equipment.
Safety information
Use only approved wheels and tires
Do not mount steel wheels
Use approved wheel/tire combinations
Recommended tire brands
Tire types are developed for each vehicle and optimized specifically for the individual requirements of that vehicle, e.g.:
Handling.
Comfort.
Noise characteristics.
Specially developed tires are marked with a star on the tire sidewall. After replacing wheels and tires, the vehicle manufacturer recommends using star-marked tires again. The vehicle manufacturer recommends that you use tires of the same make and tread design.
New tires
Tire traction is not optimal due to manufacturing circumstances when tires are brand new.
Drive conservatively for the first 200 miles/300 km.
Retreaded tires
Do not use retreaded tires
Maximum speed
Safety information
Observing the maximum speed for your tires
Maximum speed of winter tires
If the maximum speed of the vehicle is higher than the maximum permissible speed of the winter tires, the maximum permissible speed must be indicated with a sign placed in the field of vision. The info label is available from an authorized service center or another qualified service center or repair shop.
Winter tires
Winter tires are recommended for operating on winter roads.
Winter tires can be identified by the mountain/snowflake icon and the letters M+S on the tire sidewall.
So-called all-season tires with M+S marking but without mountain and snowflake icon have better winter properties than summer tires. As a rule, all-season tires do not perform the same as winter tires.
Wheel change between axles
Do not change wheels between axles
Storing tires
Tire pressure
Do not exceed the maximum tire inflation pressure indicated on the tire sidewall.
Storage
Store wheels and tires in a cool, dry and dark place.
Always protect tires against all contact with oil, grease, and solvents.
Do not leave the tires in plastic bags.
Remove dirt from wheels or tires.
Repairing a flat tire
Safety precautions
Park the vehicle on solid and non-slip ground at a safe distance from road traffic.
Turn on the hazard warning system.
Set the parking brake.
Turn the steering wheel until the front wheels are in the straight-ahead position and engage the steering wheel lock.
As soon as permitted by the traffic flow, have all vehicle occupants get out and make sure that they remain outside the hazardous area such as behind a guardrail.
If necessary, set up the hazard triangle or hazard warning lights at an appropriate distance.
Sport tires
General information
The vehicle can be fitted with sport tires, which have been optimized for use on a racetrack in dry conditions.
These track tires are made from an optimized material mixture specially derived from motorsport. In addition, the tire tread is partly reduced to create a larger contact area with the road surface. These adjustments can increase driving dynamics such as steering behavior, precision, or road grip.
Additional information:
At an authorized service center or another qualified service center or repair shop.
On the website of the respective tire manufacturer.
Safety information
Observe with sport tires and low temperatures
Activating driving stability control systems when wet
Activating driving stability control systems at low temperatures
Storage
If the sport tires are not used for a long period of time, we recommend removing the wheels from the vehicle.
Store wheels or sport tires in a clean, dry, and dark place at temperatures above 32 ℉/0 ℃.
Use on the road
The sport tires meet the legal regulations for use in public road traffic.
After being used on a racetrack, the sport tires may no longer be suitable for road traffic. Therefore, after they have been used on a racetrack, check the sport tires against the legal regulations for use in public road traffic, for instance the minimum tread depth.
Use on a racetrack
General information
Always check the sport tires for damage, foreign bodies lodged in the tread, and wear before using them on a racetrack.
Check the tire pressures when the tires are cold.
Bring the sport tires to temperature with a moderate, modified driving style when using them on the racetrack.
Intensive use
After an extended period of intensive driving on a racetrack and driving over curbs or leaving the roadway, the sport tires can become damaged.
Check the sport tires for damage, foreign bodies lodged in the tread, and tread wear. The wheel must be removed in order to check the outside and inside of the sport tires. Have sport tires checked by an authorized service center or another qualified service center or repair shop.
Tire pressure
General information
Check the tire inflation pressure regularly and correct it if necessary, taking the regulations for use on the road or a racetrack into account. The tires heat up while driving. The tire pressure increases with the tire temperature.
Tire pressure specifications
The tire pressure table contains all tire inflation pressure specifications for given tire sizes at ambient temperature. The tire inflation pressure specifications apply to the tire sizes approved by the vehicle manufacturer for the corresponding vehicle types.
To identify the correct tire inflation pressure, please note the following:
Tire sizes of the vehicle.
Maximum speed at which the vehicle is driven.
Tire repair set
Principle
With the tire repair set, minor tire damage can be sealed temporarily to enable continued driving.
General information
The filled in tire sealant closes the damage from the inside when it hardens.
Follow the instructions on using the tire repair set found on the compressor and sealant bottle.
The use of a tire repair set can be ineffective if the tire puncture measures above approx. 0.16 in/4 mm.
Do not remove foreign objects that have penetrated the tire. Remove foreign objects only when they are visibly protruding from the tire.
The compressor can be used to check the tire inflation pressure.
Overview
Storage
Depending on the equipment, storage for the tire repair set is provided as follows:
In the cargo area under the cargo floor panel.
In the cargo area on the left or right side.
In the cargo area behind a side trim panel.
Sealant bottle and filler hose
1
2
3
4
5
1
Sealant bottle
2
Sealant bottle outlet
3
Filler hose
4
Sealant bottle connection
5
Wheel valve connection
Compressor
1
2
3
4
5
6
1
Compressor
2
Tire pressure display
3
Pressure reducing valve button
4
Sealant bottle mount
5
Connector for socket
6
Power switch
Safety precautions
Park the vehicle as far away as possible from passing traffic and on solid ground.
Turn on the hazard warning system.
Set the parking brake.
Turn the steering wheel until the front wheels are in the straight-ahead position and engage the steering wheel lock.
As soon as permitted by the traffic flow, have all vehicle occupants get out and make sure that they remain outside the hazardous area such as behind a guardrail.
If necessary, set up the hazard triangle or hazard warning lights at an appropriate distance.
Remove the warning label for maximum permissible speed from the compressor and attach it in a visible location in the vehicle interior.
Remove the warning label from the sealant bottle and stick it to the rim.
Preparing the tire repair set
Insert the sealant bottle into the mount on the housing of the compressor.
Turn the sealant bottle clockwise by 90° to the stop.
Connect the filler hose to the outlet of the sealant bottle and turn clockwise by 90° to the stop.
Unscrew the valve cap from the wheel and screw the connecting piece of the filler hose onto the valve.
With the compressor switched off, insert the connector into the power socket in the vehicle interior.
Filling the tire with sealing compound
Safety information
Observe in closed areas
Switch off the compressor after 10 minutes
Filling the tire with sealing compound
With standby state or drive-ready state switched on, switch on the compressor.
Let the compressor run for max. 10 minutes to fill in the tire sealant and reach a tire pressure of 2.5 bar/36 psi.
While the tire is being filled with tire sealant, the tire pressure can briefly reach approx. 6 bar/87 psi. Do not turn off the compressor in this phase.
Switch off the compressor.
Checking the tire pressure
Read the tire pressure on the tire pressure display of the compressor. The tire pressure must be at least 2.5 bar/36 psi.
Tire pressure too high
If the tire pressure is too high, reduce the tire pressure with the pressure reducing valve on the compressor.
Minimum tire inflation pressure is not reached
Do not continue driving unless a minimum tire pressure of 2.5 bar/36 psi is reached. Contact an authorized service center or another qualified service center or repair shop.
Minimum tire inflation pressure is reached
Pull the connector out of the socket in the vehicle interior.
Disconnect the hose from the sealant bottle and the valve on the wheel.
Screw the valve cap onto the valve.
Stow the tire repair set in the cargo area.
Immediately drive 5 miles/10 km to ensure that the tire sealant is evenly distributed in the tire.
Do not exceed the speed limit of 50 mph/80 km/h.
If possible, do not drive at speeds less than 12 mph/20 km/h.
Tire sealant may spray from the damaged area during the initial wheel rotations.
Adjusting the tire pressure
Stop at a suitable location.
Connect the hose directly to the compressor and turn clockwise by 90° until it audibly engages.
Unscrew the valve cap from the wheel and screw the connecting piece of the hose onto the valve.
Insert the connector into the socket in the vehicle interior.
Read the tire pressure on the tire pressure display of the compressor.
Do not continue driving unless a minimum tire pressure of 1.3 bar/19 psi is displayed. Contact an authorized service center or another qualified service center or repair shop.
Correct the tire pressure to 2.5 bar/36 psi.
Increase tire pressure: with standby or drive-ready state turned on, turn on the compressor and let it run for a maximum of 10 minutes.
Reduce tire pressure: Press the pressure reducing valve button on the compressor.
Remove and stow the tire repair set
Switch off the compressor.
Pull the connector out of the socket in the vehicle interior.
Disconnect the hose from the compressor and the valve on the wheel.
Screw the valve cap onto the valve.
Stow the tire repair set in the cargo area.
Continuing the trip
Do not exceed the speed limit of 50 mph/80 km/h.
Do not exceed a maximum distance travelled of 125 miles/200 km.
Re-initialize the flat tire monitor or reset the Tire Pressure Monitor.
Replace the faulty tire and the sealant bottle of the tire repair set promptly.
Additional information:
Flat tire monitor.
Tire pressure monitor.
System limits
If the tire cannot be made drivable, contact an authorized service center or another qualified service center or repair shop.
With Tire Pressure Monitor: Using sealant can damage the air pressure sensor. In this case, have the electronics checked and replaced at the next opportunity.
Snow chains
Safety information
Mount snow chains on suitable tires only
Tighten snow chains sufficiently
Fine-link snow chains
The manufacturer of the vehicle recommends the use of fine-link snow chains. Certain types of fine-link snow chains have been tested by the manufacturer of the vehicle and recommended as road-safe and suitable.
For information on suitable snow chains, contact an authorized service center or another qualified service center or repair shop.
Use
Use is only permitted in pairs on rear wheels equipped with the tires of the following wheel/tire sizes:
|
Tire size |
Wheel size |
Rim offset (IS) |
|---|---|---|
|
275/35 R19 |
9.5J x 19 |
20 |
Information on the wheel size and rim offset is located on the inside of the wheel.
The list can also include wheel/tire sizes that are only suitable for certain models.
Information on wheels and tires approved for the vehicle can be requested from an authorized service center or another qualified service center or repair shop.
Follow the snow chain manufacturer's instructions.
If vehicle is equipped with Tire Pressure Monitor: When using snow chains, do not reset the Tire Pressure Monitor, otherwise, incorrect values may be displayed.
If vehicle is equipped with flat tire monitor: When using snow chains, do not initialize the flat tire monitor, otherwise, incorrect values may be displayed.
When driving with snow chains, if needed, briefly activate M Dynamic Mode.
Maximum speed with snow chains
Do not exceed a speed of 30 mph/50 km/h when using snow chains.
Tire pressure monitor
Principle
The Tire Pressure Monitor monitors the tire pressure and issues a warning if the tire pressure has dropped.
General information
Sensors in the tire valves measure the tire inflation pressure and tire temperature.
Depending on the tire entered or detected, the system automatically compares the specified nominal pressures with the current tire pressures.
If tires are being used that are not specified in the tire inflation pressure details on the vehicle such as tires with special approval, the system needs to be actively reset. The system will then take over the actual tire inflation pressures as the target pressures.
When operating the system, also note the information found in the Tire inflation pressure chapter.
Additional information:
Tire inflation pressure.
Safety information
Correctly entering the tire settings
Functional requirements
The following prerequisites must be met for the system; otherwise, reliable notification of a tire pressure loss is not assured:
Every time a tire or wheel is changed, the correct details on the mounted tires must be entered in the tire settings.
The Tire Pressure Monitor does not activate until after driving for a few minutes:
After a tire or wheel change.
After a reset, when using tires with special approval.
After changing the tire setting.
For tires with special approval:
After a tire or wheel change, a reset was performed with the correct tire inflation pressure.
After the tire inflation pressure was adjusted to a new value, a reset was performed.
Wheels with air pressure sensor.
Tire settings
General information
The tire sizes of the mounted tires can be gathered from the tire inflation pressure details on the vehicle or directly on the tires.
The tire details do not need to be re-entered when the tire pressure is corrected.
For summer and winter tires, the tire details entered last are stored. After a tire or wheel change, the settings of the tire sets used last can be selected.
Adjusting the tires
Apps menu
"Vehicle"
"Vehicle status"
"Tire Pressure Monitor"
"Tire settings"
"Tire selection"
"Manual"
"Tire type"
Select the tire size for the rear axle.
For tires with special approval:
"Other tires/race track"
Observe further proceeding in the perform a reset section.
Select the maximum speed to be driven.
"Save tire settings"
The measurement of the current tire inflation pressure is started. The measurement progress is displayed.
Status display
Current status
The system status can be displayed on the control display, e.g., whether or not the system is active.
Apps menu
"Vehicle"
"Vehicle status"
"Tire Pressure Monitor"
The current status is displayed.
Current tire pressure
The current tire pressure is displayed for each tire.
The current tire inflation pressures may change whle driving or depending on the outside temperature.
Current tire temperature
The current tire temperatures are displayed.
The current tire temperatures may change while driving or due to the outside temperature.
Tire conditions
General information
Tire and system status are indicated by the color of the wheels and a text message on the control display.
Any existing messages may not be deleted if the nominal pressure is not reached after the tire inflation pressure is corrected.
All wheels green
The system is active and bases warnings on the target pressures.
For tires with special approval: the system is active and bases warnings on the tire inflation pressures stored during the last reset.
One to four yellow wheels
A flat tire or major tire pressure loss has occurred in the indicated tires.
Gray wheels
It may not be possible to identify tire pressure losses.
Possible causes:
Malfunction.
During tire inflation pressure measurement, after confirmation of the tire settings.
For tires with special approval: a reset is performed for the system.
For tires with special approval: performing a reset
Apps menu
"Vehicle"
"Vehicle status"
"Tire Pressure Monitor"
Make sure that the tire settings are correct.
Tire settings.
Turn on drive-ready state and do not drive off.
Reset tire pressure: "Perform reset".
Drive off.
The wheels are displayed in gray and the following is displayed: "Resetting tire pressure…".
After a travel time of several minutes, the set tire inflation pressures are accepted as the predefined tire inflation pressures. The reset is completed automatically while driving.
After a successfully completed reset, the wheels on the control display are shown in green and the following is displayed: "Reset successful."
You may interrupt this trip at any time. When you continue driving the reset resumes automatically.
Messages: for tires without special approval
General information
When a flat tire is indicated, the Dynamic Stability Control may be turned on.
Safety information
Do not continue driving with insufficient tire inflation pressure
With recommended tire pressure test
Message
An icon with service information is shown on the control display and, if necessary, in the My BMW App.
|
Icon |
Possible cause |
|---|---|
|
|
Leak detected on the tire. |
Measure
Check the tire pressure and correct as needed.
If a tire inflation pressure check is required
Message
An icon with a Check Control message appears on the control display.
|
Icon |
Possible cause |
|---|---|
|
|
Inflation was not carried out according to specifications, for instance when the tire has not been sufficiently inflated or in the case of a natural steady tire pressure loss. |
Measure
Check the tire pressure and correct as needed.
If the tire inflation pressure is too low
Message
A yellow warning light is illuminated in the instrument cluster.
In addition, an icon with a Check Control message appears on the control display.
|
Icon |
Possible cause |
|---|---|
|
|
There is a tire pressure loss. |
Measure
Reduce the vehicle speed. Do not exceed a speed of 80 mph/130 km/h.
At the next opportunity, for instance at a filling station, check the tire inflation pressure in all four tires and correct if necessary.
If there is a significant tire pressure loss
Message
A yellow warning light is illuminated in the instrument cluster.
In addition, an icon with the affected tire appears in a Check Control message on the control display.
|
Icon |
Possible cause |
|---|---|
|
|
There is a flat tire or a major tire pressure loss. |
Measure
Reduce your speed and stop cautiously. Avoid sudden braking and steering maneuvers.
Read the description on what to do in case of a flat tire.
Actions in the event of a flat tire.
Messages: for tires with special approval
General information
When a flat tire is indicated, the Dynamic Stability Control may be turned on.
Safety information
Do not continue driving with insufficient tire inflation pressure
If a tire inflation pressure check is required
Message
An icon with a Check Control message appears on the control display.
|
Icon |
Possible cause |
|---|---|
|
|
Inflation was not carried out according to specifications, e.g., the tire has not been sufficiently inflated. The system has detected a wheel change, but no reset was done. The tire inflation pressure has fallen below the level of the last reset. No reset was performed for the system. The system issues a warning based on the tire inflation pressures stored during the last reset. |
Measure
Check the tire pressure and correct as needed.
Perform a system reset.
If the tire inflation pressure is too low
Message
A yellow warning light is illuminated in the instrument cluster.
In addition, an icon with a Check Control message appears on the control display.
|
Icon |
Possible cause |
|---|---|
|
|
There is a tire pressure loss. No reset was performed for the system. The system issues a warning based on the tire inflation pressures stored during the last reset. |
Measure
Reduce the vehicle speed. Do not exceed a speed of 80 mph/130 km/h.
At the next opportunity, for instance at a filling station, check the tire inflation pressure in all four tires and correct if necessary.
Perform a system reset.
If there is a significant tire pressure loss
Message
A yellow warning light is illuminated in the instrument cluster.
In addition, an icon with the affected tire appears in a Check Control message on the control display.
|
Icon |
Possible cause |
|---|---|
|
|
There is a flat tire or a major tire pressure loss. No reset was performed for the system. The system issues a warning based on the tire inflation pressures stored during the last reset. |
Measure
Reduce your speed and stop cautiously. Avoid sudden braking and steering maneuvers.
Read the description on what to do in case of a flat tire.
Actions in the event of a flat tire.
Actions in the event of a flat tire
Identify the damaged tire.
Check the tire pressure in all four tires, for instance using the tire pressure display from a tire repair set.
For tires with special approval: when the tire pressure in all four tires is correct, the Tire Pressure Monitor may not have been reset. In this case, perform the reset.
If no tire damage can be identified, contact an authorized service center or another qualified service center or repair shop.
Repair the flat tire, for instance with a tire repair set or by changing the wheel.
Using a sealing compound, for instance from the tire repair set, may damage the wheel electronics. Have the electronics replaced at the next opportunity.
System limits
Temperature
The tire inflation pressure depends on the tire's temperature.
Driving or exposure to the sun will increase the tire temperature, thus increasing the tire inflation pressure.
The tire inflation pressure is reduced when the tire temperature falls again.
These circumstances may cause a warning when temperatures fall very sharply.
Sudden tire pressure loss
The system cannot indicate sudden and serious tire damage caused by external circumstances.
Failure performing a reset
Tires with special approval: the system will not function correctly if a reset was not performed, for example a flat tire may be indicated although the tire inflation pressures are correct.
Malfunction
Message
The yellow warning light flashes and is then illuminated continuously. A Check Control message is displayed. It may not be possible to identify tire pressure losses.
Measure
A wheel without air pressure sensor is mounted: Have the wheels checked as needed.
Fault caused by systems or devices with the same transmission frequency: The system automatically reactivates after leaving the area of the interference.
For tires with special approval: the system was unable to complete the reset. Perform a system reset again.
If the Tire Pressure Monitor malfunctions: Have the vehicle checked by an authorized service center or another qualified service center or repair shop.
Declaration according to NHTSA/FMVSS 138 Tire Pressure Monitoring System
Declaration according to NHTSA/FMVSS 138 Tire Pressure Monitoring Systems
Flat tire monitor
Principle
Animation: flat tire monitor
The flat tire monitor detects a tire pressure loss while driving and issues a warning if the tire pressure has dropped.
General information
The system detects tire pressure loss on the basis of rotation speed differences between the individual wheels while driving.
In the event of a tire pressure loss, the diameter and therefore the rotational speed of the corresponding wheel changes. The difference will be detected and reported as a flat tire.
The system does not measure the actual inflation pressure in the tires.
Functional requirements
The following prerequisites must be met for the system; otherwise, reliable notification of a tire pressure loss is not assured:
After a tire or wheel change, an initialization was carried out at the correct tire pressure.
After the tire pressure was adjusted to a new value, an initialization was performed.
Status display
The current status of the flat tire monitor can be displayed, e.g., whether the flat tire monitor is active.
Apps menu
"Vehicle"
"Vehicle status"
"FLAT TIRE MONITOR"
The status is displayed.
Initialization required
An initialization must be performed in the following situations:
After the tire inflation pressure has been adjusted.
After a tire or wheel change.
Performing initialization
When initializing, the set tire inflation pressures serve as reference values in order to detect a flat tire. Initialization is started by confirming the tire inflation pressures.
Do not initialize the system when driving with snow chains.
Apps menu
"Vehicle"
"Vehicle status"
"FLAT TIRE MONITOR"
Turn on drive-ready state and do not drive off.
Start the initialization with: "Perform reset"
Drive off.
The initialization is completed while driving, which can be interrupted at any time.
The initialization automatically continues when driving continues.
Messages
General information
When a flat tire is indicated, the Dynamic Stability Control (DSC) is turned on, if needed.
Safety information
Do not continue driving with insufficient tire inflation pressure
Indication of a flat tire
A yellow warning light is illuminated in the instrument cluster.
In addition, an icon with a Check Control message appears on the control display.
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Icon |
Possible cause |
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There is a flat tire or a major tire pressure loss. |
Measure
Reduce your speed and stop cautiously. Avoid sudden braking and steering maneuvers.
Read the description on what to do in case of a flat tire.
Actions in the event of a flat tire
Identify the damaged tire.
To do this, check the tire pressure in all four tires, for instance using the tire pressure display from a tire repair set.
When the tire inflation pressure in all four tires is correct, the flat tire monitor may not have been initialized. In this case, initialize the system.
If tire damage cannot be identified, contact an authorized service center or another qualified service center or repair shop.
Repair the flat tire, for instance with a tire repair set or by changing the wheel.
System limits
The system may be delayed or malfunction in the following situations:
A natural, even tire pressure loss in all four tires will not be recognized. Therefore, check the tire inflation pressure regularly.
Sudden and serious tire damage caused by external circumstances cannot be recognized in advance.
The system has not been initialized.
When driving on a snowy or slippery road.
Sporty driving style: slip on traction wheels, high lateral acceleration (drifting).
When driving with snow chains.
Changing wheels/tires
General information
When a tire repair set is used, the wheel does not always need to be changed immediately in the event of a breakdown when there is tire pressure loss.
If necessary, a suitable wheel change tool, e.g., a jack, is available as an accessory from an authorized service center or another qualified service center or repair shop.
Safety information
Do not lie under the raised vehicle
Do not place supports under the jack
Only use the jack in the event of a breakdown
Always change the wheel on a suitable surface
Use the jack only for changing wheels
Insert the jack into the jack points
Do not exert forces on the raised vehicle
Using only one lug wrench
Securing the vehicle against rolling away
General information
The vehicle manufacturer recommends to additionally secure the vehicle against rolling away when changing a wheel.
On a level surface
Place wheel chocks or other suitable objects in front and behind the wheel that is diagonal to the wheel to be changed.
On a slight downhill gradient
If you need to change a wheel on a slight downhill grade, place chocks and other suitable objects, for instance rocks, under the proper side of the wheels of both the front and rear axles to block the car from rolling downhill.
Lug bolt lock
Principle
The wheel lug bolts have a special coding. The lug bolts can only be released with the adapter which matches the coding.
Overview
The adapter of the lug bolt lock is in the onboard vehicle tool kit or in a storage compartment close to the onboard vehicle tool kit.
Lug lock bolt, arrow 1.
Adapter, arrow 2.
Unscrewing
Attach the adapter to the lug lock bolt.
Unscrew the lug lock bolt.
Remove the adapter after unscrewing the lug bolt.
Screwing on
Attach the adapter to the lug lock bolt. If necessary, turn the adapter until it fits on the wheel lug bolt.
Screw on the lug lock bolt. The tightening torque is 101 lbs ft/140 Nm.
Remove the adapter and stow it after screwing on the lug bolt.
Safety precautions
Park the vehicle on solid and non-slip ground at a safe distance from road traffic.
Turn on the hazard warning system.
Set the parking brake.
Turn the steering wheel until the front wheels are in the straight-ahead position and engage the steering wheel lock.
Engage a gear or move the selector lever to position P.
As soon as permitted by the traffic flow, have all vehicle occupants get out and make sure that they remain outside the hazardous area such as behind a guardrail.
If necessary, set up the hazard triangle or hazard warning lights at an appropriate distance.
Depending on vehicle equipment, remove the wheel change set and, if necessary, the emergency wheel from the vehicle.
Secure the vehicle additionally against rolling away.
Loosen the lug bolts a half turn.
Jacking points
The jacking points are located at the indicated positions.
Jacking up the vehicle
Pay attention to the position of the hands
Hold the vehicle jack with one hand, arrow 1, and grasp the jack crank handle or lever with your other hand, arrow 2.
Insert the jack into the rectangular recess of the jacking point closest to the wheel to be changed.
Extend the jack by turning the jack crank handle or lever clockwise.
Take your hand away from the jack as soon as the jack is under load and continue turning the jack crank handle or lever with one hand.
Make sure that the car jack foot extends vertically and is at a right angle beneath the jacking point.
Crank the vehicle up until the entire jack surface is on the ground and the corresponding wheel is lifted max. 1.2 inches/3 cm above the ground.
Mounting a wheel
Mount one emergency wheel only, as required.
Unscrew the lug bolts.
Remove the wheel.
Put the new wheel or emergency wheel on and screw in at least two lug bolts in a crosswise pattern until hand-tight.
When non-original light-alloy wheels of the vehicle manufacturer are mounted, the accompanying lug bolts may have to be used as well.
Hand-tighten the remaining lug bolts and tighten all lug bolts well in a crosswise pattern.
Turn the jack crank handle counterclockwise to retract the jack and lower the vehicle.
Remove the jack and stow it securely.
After the wheel change
Tighten the lug bolts crosswise. The tightening torque is 101 lbs ft/140 Nm.
Stow the faulty wheel in the cargo area, if necessary.
Check tire inflation pressure at the next opportunity and correct as needed.
Re-initialize the flat tire monitor or reset the Tire Pressure Monitor.
Check to make sure the lug bolts are tight with a calibrated torque wrench.
Drive to the nearest authorized service center or another qualified service center or repair shop, then have the damaged tire replaced.
Emergency wheel
Principle
In the event of a flat tire, the emergency wheel can be used in place of the wheel with the faulty tire. The emergency wheel is only intended for temporary use until the faulty tire/wheel has been replaced.
General information
Mount one emergency wheel only.
Also check the tire inflation pressure of the emergency wheel in the cargo area regularly, and correct it as needed.
Safety information
Watch the speed when driving with the emergency wheel
Overview
The emergency wheel and wheel change set are located in a bag in the cargo area.
Removing the emergency wheel
Loosen the strap at the buckles.
Detach the snap hooks of the tensioning straps at the lashing eyes.
Remove the bag containing the emergency spare wheel and wheel change set from the cargo area.
Open the bag, then remove the spare wheel and wheel change set.
Inserting the emergency wheel
Stow the emergency spare wheel and wheel change set in the bag.
Place the bag in the cargo area.
Attach the snap hooks of the tensioning straps at the lashing eyes.
Fasten the tensioning straps. Make sure that it is correctly and firmly seated.
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