1. Why need to choose the car type ?

RE: Different BMW models might have different system, thus,you need to choose the correct car type in factory setting interface, so that the Android screen (and factory function) can work correctly.

2, How to set the car type ?

RE: 1) Access factory interface:
Factory password: 1314, click ok. then will get into factory menu:

access factory setting interface

 

2) Choose your car type , double click it, it will come out a message, then click "confirm", then the car type you choosen will show as  "√"

An other way: choose the car type, then power off the car, lock the door (so that
to cut off all the power), wait 10-20 seconds, then power on again.