I've got an issue..... The drive is horrible on my A4 auto sport........ A lot of vibration which I suspect is down to the*flywheel*possibly on its way out But what is annoying me is sometimes when I come to a stop... Say at a junction or lights.... The car suddenly goes into some funny mode.... Where it revs a lot more than normal when moving off.... And I've noticed that if I turn the car off and then back on again... The glow plug light takes a long time to go off.... And the car is then revving a lot higher.... I. E. It takes over 2000rpm to move off. However during driving the car may go back to normal... I. E. Use less revs. Anybody got any ideas what that may be?