I have to think this is possible. My CPO car came with the BMW roof mounted screen and DVD system... as you scroll the screen video inputs, one of them that shows up is NAV. Now, I know that the screen/DVD system is from Alpine, so maybe it's a leftover from their system, but I would suspect that BMW would have asked for that to be removed if it was not available somewhere in the world. Anyone have a translated version of the German manual for the BMW video/DVD system? Maybe it's something we can figure out how to turn on, or add an input for... Just a thought.
cjett