hi all i have a a6 2.8 quattro. whenever i stop at a junction for example, sometimes the engine cuts out or has to hunt for the correct tickover speed (this happens about 7 times out of 10). (once engine has cut out -- start up again and its ok), the problem above only seems to happen once i have driven the vehicle(any distance). if i just start the engine from cold , the tick over speed is perfect) any ideas ?? cheers quattro25years.