The V belt runs the alternator, A/C, viscous fan, power steering pump. Its not engine critical so I don't usually worry about it much, I just change it when it starts squeaking too much.
For a 10 year old car I would definitely ask if they are changing the cambelt rollers, I think the S8 has 2 of them. They are not usually on the cambelt service list you may have to specifically ask.
The eccentric idler is another cambelt roller essentially, so you may want to change that too. Hopefully someone with more experience will comment, maybe the eccentric idler has a much longer lifespan than the other two rollers?
(My previous S8 went through 3 cambelt services for its sins, the 1st one by Audi dealer did not change the rollers, the 2nd one (because waterpump was being done) did not change the rollers, only the 3rd one at Unit 20 changed all rollers)
Last edited by Goran; 25th April 2014 at 01:57 PM.
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