Hello, not long ago the camshaft was damaged on my A 6. During this repair all 4 camshafts were replaced. Now after approx. 8000 kilometers the camshafts have already entered massively again. The car has been standing for about 10 days in the Audi workshop and there are no camshafts available for the vehicle nationwide and Audi can not provide any information regarding a delivery date. According to the Audi Master there are considerable problems with the engine with the camshaft n (the camshafts aren’t behind for nothing). I was thinking Audi has the problem under control. Gruss Hesse89