Hi, I have a 2000 year S6 and discovered a black 'flaky' build up of debris on the underside of the oil cap - is this normal or is it indicative of a problem now or historically? - Thanks for any comments.

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Matt

When you say the underside of the oil cap, do you mean actually from the section that covers the engine, or simply from the section surrounding the cap that may get dust accumilated under it?

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Audi S6 Avant 4.2 MT6 2001
Pipercross air filter
Tinting
Rear Parking Aids

Planned
Painted Wheels (???)
Tinted Tail Lights (Black)
Miscellaneous fixes