I'm about to pull the trigger on an 06 A4 2.0T. It has the satellite antenna but does not have nav. When I pressed the SAT button on the radio it said no satellite. Any ideas?

Also, I didn't notice if it had HID headlights.

 

All audis are pre-wired for satellite radio, you just have to buy either the XM or Sirius module and have the dealer code the radio to recognize it.