I want Sirius and prior to 03 it wasn't an option so the system can't handle it. The alternative is a modulator of some sort but I've tried it before and don't like it. I put in a Pioneer with the flip up screen so now I have Nav/Sirius/Changer/Ipod control all through the touch screen.

I never pulled the nav out of my X to see how much room there is but anybody thinking of putting a double din unit into an E39 (5 series) it probaby isn't going to fit. There is a deep space at the top but it's shallow at the bottom.