Audi are galvanized on both sides, you don't see rusty Audi's. waste of money.

 

This question on warranty and rust proofing has come up several time on several different threads. If someone will definitively provide us with substantiated information such as a dealer letter etc. we can put this to rest.

As a side note here, when I purchased my S4 I asked the dealer about rust proofing and the sales guy did say it would void warranty. This however is the word of a sales person.

Thanks