Hello, I have two faults currently, which I need help with. 1: The Yellow Oil Sensor light, which appears intermittently. Oil level has been checked, and ok. The sensor off the sump has been taken off to see if it could be faulty sensor. The light came on again, so eliminating this issue. 2: In this past week, my rev counter has gone upto a '4' when in neutral, but, also when driving the car is like being driven itself, due to some fault. Hesistating taking it to Audi garage, as diagnostics are a con! Thanks for your help.