2004 X5

[Cory949]

I have searched and cannot find an answer to this question. I want to install a NAV system in my vehicle. I have completed a NAV install on my Audi A4. It was a little complicated but accomplished in a day.

The Dealer says my 2004 HAS the GPS (My vehicle has BMW Assist) and Bluetooth to boot!. The bluetooth module is installed on the top of the rear quarter panel rack (and they supplied the pin). I pressed the assist by accident (well curisoity) and the Lat and Lon appeared on the radio before it dialed the BMW Assist operator.

Since the car seems to be "prepped" for NAV, are there any special things I should know? I'm ready to buy a MKIV unit with the cable and all, but don't know if I need the cable.

Any suggestions or resources I should look for?
Thanks, Corey