Hi, I have the same problem with the 50 TDI engine in the Audi Q7. Moreover I have next problem with the gearbox, when the transmission shifts, especially from 2 to 3 and from 3 to 4 at less load, I can feel twitches and gearbox makes strange sounds. Audi even changed my gearbox! Absolutely no result.

Nobody tells you anything. They only say "we will see, please wait"

But I have been waiting for a year! Car for 100 ths. EUR!!! Awe...