For this to work you must have the factory Evo head unit and pro nav screen. Will not work otherwise. 
Check your current Map and iDrive version:
Go to Navigation -> Scroll down to Settings -> Select Position & Version -> Select Version Information
Check your current Software version:
Select My Vehicle -> iDrive settings -> Software update -> Show current version
Road Map “Region” EVO = NBTevo unit
If u have NBTevo_A or C or D or E or F or G -> then upgrade to iD6 with CarPlay Full Screen is possible