Really miss my XM radio from the ICE I left to go to my P100D. I know I can stream through my cell phone but that is way less than ideal and the data plan kills me. I'd really love to have the native XM/Sirius function on the main display. Is there REALLY no way to do this after the fact? When I bought this car a month ago, I was told unless I ordered it that way with the sunroof option, it was not available. I'm sure this has been discussed before but I still can't buy the "antenna is part of the sunroof" argument. The last time I added XM to a car, the antenna was 1-1/2" square and was easily hidden.