Hello everybody! I've just bought an S6 Avant which is an awsome car even though I spend alot of time filling it up. The rear parking sensors seem to have a life of there own. If I start the car up and put it into reverse straight away they beep constantly and turn off showing a fault. If I leave the car running for a few minutes the work fine. I've take the car to West London Audi who offer the worst service possible. Not only do they carry out bad work but they charge £130.00 per hr!!! I was wondering if anybody had experience of these, thanks in advance.