After installing the Koason Mercedes-Benz NTG3.0/3.5/4.0/4.5/4.7/5.0/5.5/6.0 Android screen, you may encounter problems such as the original system flickering or incorrect display.

There are also some models where the original interface seems to display normally, but when returning to the Android interface, there will be residual images, and the screen flickers after reversing is completed. the following photos is typical problems happens on Mercedes android display: 

These display abnormalities are caused by the original car display parameters not being selected correctly. You need to go to the Android factory mode to select the correct parameters.

Different Mercedes-Benz original systems have different parameters. You need to select car models one by one according to the original radio system until the original interface displays normally:

For Mercedes-Benz NTG3.0 system vehicles, please select option 21/22/23/24.

For Mercedes-Benz NTG3.5 system vehicles, please select option 19/20.

For Mercedes-Benz NTG4.0 system vehicles, please select option 13/14/15/16/29/30.

For Mercedes-Benz NTG4.5/4.7 system vehicles, please select option 11/12/13/14/17/18.

For Mercedes-Benz NTG5.0 system vehicles, please select option 5/6/7/8.

For Mercedes-Benz NTG5.5 system vehicles, please select option 1/2/3/4/9/10.

For Mercedes-Benz NTG6.0 system vehicles, please select option 3/25/26/27/28.

Routes：Settings-Factory（Key：2018）-Vehicle display

After selecting the correct parameters, press the reset button on the side of the mercedes android screen to restart. then the OEM display will work out.