No sound from speakers/ no reverse camera/Navi




2- Check it has power/GND to run
3- Check for questionable wiring connection to the car
4- Check the COMAND unit is running
5- Clean both sides footwell of painted GND
6- If you have Android Box troubleshooting steps use them now else....
7- Bypass the audio around Android box.
Nothing I press or do changes either of those screens...All of the labels on the screen itself are in a different language, but I'll see what I can find. Here's a picture of the screen, if anyone has a wiring diagram for this one please let me know.


