I just had check engine light which aperantly is a bad mechatronic device. thank god nothing bad happened during driving, however when i talked to audi corporate and was told it was not acommon problem and they dont want to fix it. the car is 60k and always was taken care in dealership shops, on time. used only 30 miles a day and always kept indorr both at my work and at home. when reading online about this problem i learnt that this is a common problem, and audi apparently not trying to cover or solve it. i am attaching description of the problem from a website (https://www.ecutesting.com/common-faults/audi/audi-s-tronic-0b5-gearbox-mechatronic-problem/) "this s-tronic transmission unit fitted to high performance audi's, with the 0b5 dl501 direct shift gearbox (dsg), is a very common failing mechatronic control unit. internal component breakdown of the s-tronic mechatronic control unit will cause a multitude of symptoms on the vehicle beginning with the illumination of the epc (electronic power control) and prnds warning lights. the running symptoms that a fault within this mechatronic...as the s-tronic/0b5 gearbox mechatronics failure advances, these symptoms progress further into critical transmission failure: sticking in gear, deactivation of half of the gears, no reverse or gears above first. typically, when dealing with these audi s-tronic gearbox problems, main dealerships and specialists will seek to purchase an expensive replacement or repair kit direct from the manufacturer, which will also incur coding fees. the glaring problem with this method is that the manufacturer of this mechatronic control unit has not yet resolved the root cause of failure at factory level, meaning that all replacements and repair kit components still have the underlying defects that will cause malfunction, usually outside the short one-year manufacturer warranty."
On my car, there is an internal transmission coolant value that is part of the cooling system and obviously, that component also helps keep the transmission temperature in check. the issue with this defective part is the valve malfunctions causing coolant to penetrate the transmission control module and from there into the wiring harness. when this happens, it is a catastrophic malfunction of those components and a potential fire hazard. water and electrical do not mix well. pictures are attached. the root of my issue is that there is no way to detect that there is a problem with the automobile until this major malfunction happens. if that were not the case, the consumer could at least have the chance to have the car serviced preventing this huge expense and potential fire hazard. i have an email from the service manager admitting this is the case. in my case. the car ran fine. then just went haywire. the service manager said coolant got into the control module and 'fried' the module and wire harness. the pictures that are attached are from the same instance i found online and not pictures from my car. this is a very serious issue with this car. audi has turned me down twice to fix this potentially combustible problem. very scary.
O-ring failure in 2012 a6 3.0 caused the transmission to internally leak fluid causing the electonic system to go bad. all of the following lights came on when issue started. check engine light, gearbox, mil trac control, mil epc, light airbag mil hi-speed cooling fan mil tire pressure warning light the transmission would not shift, major lack of power to engine. parking brake would also activate by itself. instrument panel light up like a x-mas, when i pulled over the car shut off and would not turn back on.
O-ring failure in 2012 a6 3.0 caused the transmission to internally leak fluid causing the electonic system to go bad. all of the following lights came on when issue started. check engine light gearbox mil trac control mil epc light airbag mil hi-speed cooling fan mil tire pressure warning light the transmission would not shift, major lack of power to engine. parking brake would also activate by itself.
The vehicle is having unintended episodes of acceleration. they occur while stopped or at reduced speeds such as pulling to a stop or parking.