BMW's OE Sirius module should plug right in to your car and work perfectly. You may have to install the Sirius antenna too, but that is about all you would need to do.

__________________
SOLD
2000 E38 750iL Highline Edition, Upgraded with the lastest 2006 X5 Electronics
MKIV Navigation, 16:9 Display, Bluetooth, TV/Video with Backup Camera, Sirius, and Aux Input