Could someone please help - I searched the archives for hours but couldn't find what I need for adding RNS-E NAV in an 05 S4 that came with the XM Bose Satellite head unit.

I'm not sure I need XM support yet so I'm looking for the part #'s for head units with AND without XM satellite support, for the 05 CABRIOLET? I know there is an 8H0 035 192 E for the A4 cabriolet, and and 8E0 057 593 E for XM with tire pressure, but didn't see anything about B6 S4 Cabriolets.. Also how does the tire...

Rare RNS-E Install: Early 05 S4 Cabriolet