I totaled my 06 A6, and I'm selling the 4EO 035 593 A XM receiver. It also worked in an 07 A6 with a warning message appearing for a couple of seconds about the antenna. Message disappears and does not reappear until you switch XM stations. If you use preset stations warning message doesn't appear at all. Also, Terk sells an antenna splitter that would eliminate the warning message completely.
I bought an 07 A4 cabriolet, and I'm looking for a 8EO 035 593 G for it. Does anyone have one for sale?