Hmm, from what I know about the COMBOX is that it allows you to do/enable:
- Web Browser
- Bluetooth Audio
- Album Art Covers
- BMW Apps (Facebook, Twitter, Web Radio)
- BMW Plugin
- Video Playback
In order to that, you must a have a display screen, AKA iDrive. (sorry I had asked you having navigation, I meant iDrive.) If you considering the COMBOX, then I don't understand why you want go down route if we can not utilize all the features.