Hi all , Just thought I would put a few minds at rest as it did mine. Just spent £950 on a new (vanos unit )cam balancer and the engine puuuurrrrrs. However , noticed that when I depressed the clutch the revs increased up to 1000 rpm when changing up from 1st to 2nd gear and about 600 rpm in all other gears. Thought at first I was driving like a vicar but read a few threads and the word clutch switch was mentioned. Just had one fitted for £25 , and now I realise that I wasn't driving like a vicar. Brilliant cheap fix , thanks to all the info available here and the time and effort taken by my fellow Audi fans writing it up. Happy dayz.