For everyone asking about navigation map updates, pm @shawnsheridan. I believe coding is necessary in switching from Europe to North America and vice versa in regards to your FA (whatever your region code is, you simply change it in there, and I assume VO Code HU_NBT).
I know that when you update to the latest maps, you have to get an FSC code and download the maps onto a thumb drive to load them into your iDrive.
Refer to this thread for update information regarding navigation maps:
http://www.bimmerfest.com/forums/sho...d.php?t=777905