I have seen today totalled audi with 12v engine in some small car shop. I noticed it because same engine and same colors. The radiator, bumper and all around is destroyed. Engine, AT, CC, quattro (if it is qiattro), steering, audio, brakes, etc might be usefull. I am not associated with the owner and not sure what year is it or even is A4 or A6. I sure it is 12v engine :). In any case, if you are look ing for a part - call 201.592.84.94 (ask ayed) he might have it.
BTW it has 16" 5 spoke rims - he might sell them for chip also. Again I am not assosiated with the guy.