Just bought a 2007 A8L (traded our A6 4.2) and was wondering if the car is pre-wired for Sirius, car has all options other than Sirius and Bang & Olfsen.

If pre-wired does anyone know the unit number needed for Sirius

 

The Sirius should be available just though activation with the company. Someone please correct me if I'm wrong. I also own a 07, it's been dead reliable so far. I did have to replace my suspension pump this winter though.