Please check the followings:
- If the original CD/headunit is turned on.
- If the LVDS cable is plugged into android screen correctly.
- If your car has optic fiber(Ignore if no optic fiber), need to relocate it to android harness, Click for details
- Check if "CAN Protocol" selection correctly(according to your car's NTG system), Routes: Setting ->Factory (code"2018")->"CAN Protocol"
Note: For Mercedes with NTG5.0/5.2 system cars,"5.0" is for Mercedes C/GLC/V Class, "5.1" is for other cars