I have a 2005 Cayenne S with a PCM module (for navigation and information) option. From the day one, my cd player did not work. Anyway, it also came with a button for satellite radio. Does anyone know if it has the satellite receiver already installed and just call satellite service to subscribe, or I need to install the receiver separately in order to make it work? The owner's manual didn't mention to install the receiver separately, just mentioned to subscribe the service as option. Currently, when I press the button, nothing shows up on the screen. It's disappointing that I can not use the cd player and/or satellite radio almost after two months. Still waiting for the new PCM module (from Germany) to be installed.