Hi Dan, It is my understanding that the avant and sedan use the same
windshield but the avant uses only a top center mast antenna and the sedan
uses a front imbedded and rear window imbedded system. My avant has great
reception with stock radio and stock Audi mast. I live in western CT.
Richard
1990 200 TQA 10 valve For sale
1991 200 TQA 20v
1997 A6 avant