Just bought an 04 TL w/ Nav -- though it won't arrive until later this month. I have a question about the sound system. I've seen messages in these forums that suggests that the XM satellite system uses up the sound system's AUX input. Wouldn't it be possible to add a splitter and a switch so that an MP3 player could be attached, and you could manually choose between this and XM? The one modification that I made to my previous vehicle was an MP3 CD player, which I loved. I'd be happy with a portable though -- I don't want to screw up the TL's dash.

DJ