My Bose headunit burned out in my 99.5 A4 quattro
So I contacted scorsche asking them if they had a wiring harness compatable with the bose system in my a4, the support guy suggested searching on the scorsche site for these 2 part numbers

SLC4 http://www.scosche.com/scosche_caraudio.aspx?CategoryID=229&ItemID=SLC4
VW03 http://www.scosche.com/scoschesearch.aspx?qString=vw03

vw03 resulted in two searchs

Result for search: VW03 http://www.scosche.com/CatalogImages/Thumbnails/VW03B.jpg (http://www.scosche.com/scosche_caraudio.aspx?CategoryID=78&ItemID=VW03B) 02-UP VW HARNESS (http://www.scosche.com/scosche_caraudio.aspx?CategoryID=78&ItemID=VW03B)[VW03B]2002-up Volkswagen power/speaker connector[/align] http://www.scosche.com/CatalogImages/Thumbnails/VW03RB.jpg (http://www.scosche.com/scosche_caraudio.aspx?CategoryID=78&ItemID=VW03RB) 02-UP VW REV HARNES (http://www.scosche.com/scosche_caraudio.aspx?CategoryID=78&ItemID=VW03RB)[VW03RB]2002-up Volkswagon power/speaker connector[/align]

Still don't know what to do since none of the harnesses look like they fit the wiring for the car

yea.... neither one of those is right google it and you can find the right adapters

http://thebassbin.co.uk/shop/product_list/c_path/146_172_287/spd/audi--wiring-harness-.html

something like this, thanks, didn't know it would be that easy