I have an '08 Cayenne GTS with no PCM. Does have the Bose surround sound though. I have ben looking in to a new Alpine unit, #505, which is 2 DIN with NAV, CD/DVD, touch screen, blue tooth for phone, sirius radio, ipod connectivity and is supposed to work with the steering wheel controls. (I am also going to install a rear camera and the Escort Passport 9500ci radar/laser detector/shifter at the same time.) My installer (Abt Elevtronics in Chicago) says I need a new amp for this to all work. They are suggesting Alpine PDX5, 5 channel amp. (The existing Bose is 8 I think.) What does anyone think of my proposed path? What do you think about the amp that is being sugested. I have never used Abt before, but they supposedly have a lot fo experience with Porsche, so that is why I went over there. Any comments or suggestions whatsoever? Anyone now what the install should run on any of that? THANK YOU!

 

I had Alpine double din GPS unit in my 996 4S/02. It was total crap. User interface was horrible. To control it one should stop looking at the road and concentrate on the GPS screen. Forget about finding right XM channel wile driving... etc, etc. $300 Garmin was always much better --- so maybe Kenwood unit is a better option (I didn't try it, but at least it ises Garmin GPS engine).
Before you buy, try to play with various hadunits and pretend you are driving.
At least Garmin's routing capabilities are MUCH, MUCH better than of PCM2.1 (latest software and map 6.2007) which I have in my current 997 TT/07