Hi guys,
Would you believe I have exactly the same problem with my Audi A6 executive ultra 2.0 TDI which I bought only two weeks ago. When it first happened I thought it was just me getting used to the car but it has happened five times since I bought it. The most recent time from slowing down from 80k/ph and I nearly had someone drive into the back of me. I will be returning it to the garage next week and I would like to thank you all for the information provided here.
Kind regards
Keith