I am sorry that I cannot provide you with a answer and am sorry if I am high jacking your posting. But I am wondering instead of paying $1,200 for the MB receiver, or $800 for the CarTronics receiver, if it would be best to just buy a Sirius receiver and a direct connect vehicle kit (under $300). I am saying this because I do not channel surf, so I can place the Sirius receiver in the ashtray or glove compartment, or even center console. The only advantage of having the integrated receiver is to operate it through the Comand. But even when I listen to the radio, I have the navigation screen displayed, so knowing what song is playing will not make a difference to me. If I change channels on the Comand, I reach over to the Comand. I could do the same with the Sirius receiver. Also, as in my Delphi FM receiver, when I shut off my previous vehicle, I had to physically turn on the receiver every time I started the vehicle. I do not know if the Sirius receivers will automatically turn on with the vehicle (???). Am I missing something here?
Just my $.02
Mike....