Does anyone know about adding XM radio? I have nav. and it says "XM-Ready" on it. It was like a $700 option, so I took my chances on being able to add it later for less.
I would guess I just need a tuner installed at Circuit city or something, but I figured I would throw it out on the forum, so that if anyone had any more info I could go in w/ at least some knowledge of what I need. Thanks all!