Easiest way to get XM in my turbo....
#3
http://www.imagineauto.com
XM still not available as on option yet. Porsche claims issues w/ the antenna/reception, which is ridiculous b/c I had my dealer's master tech hack the Cayenne OEM bit into my car (w/ guidance from Stephen at IA) and it works beautifully. I think antenna placement is the key issue, but fine if done right... mine was placed right underneath the front wiper cowling.
Here's what it looks like on the screen (just toggle to it by pressing AM-FM button once installed)...