Alright guys, with the patient help of "Rick in Prescott" I was able to install the sirius receiver in my wife's 2006 X3. The X3 was pre-wired and in retrospect it wasn't that difficult a thing to do. Well, now it a strange thing happens--though the radio shows the station, it goes mute at random. Usually at engine startup. Any Ideas guys? I really appreciat the help.