Many people bought UGODE’s Mercedes-Benz NTG4.5/NTG4.7 Android screen with wireless CARPLAY and Android AUTO functions, and found that there was no sound when playing music on the Android interface after installation.
This situation is usually caused by installation wiring or setting problems.
1.First please set the Aux switching mode to manual, as shown in the picture below, if there is no sound, there is also no sound with automatic Aux switching.
Routes：Settings-Factory（Key：2018）-Vehicle-AUX Switching Modes
For another Android version, just go into settings and uncheck Automatically switch AUX.
Routes：Settings-System-AUX settings
2.The original car interface selects AUX and then returns to Android to play music.
https://youtu.be/UwSd1sqx5P4 —Video for Benz to show how to set AUX Switching mode to “Manual/ automatic” for sound.
Note: Some cars do not have the AUX option and need to go into Android factory mode to activate it, see item 5 for instructions.
2. If you have connected Aux input?
3.Please check whether your car has optical fiber. If it has optical fiber, you need to switch it. If not, please ignore it. Click for details
4.The Mercedes Benz NTG4.0 and NTG4.5 power cords have two plugs for pairing protocols, and plugging these two plugs incorrectly can result in no sound, harsh squealing, protocol failure, and other problems.
Mercedes 4.0 cars just plug the NTG4.0 header.
For Mercedes 4.5/4.7, plug in the NTG4.5 header.
5.If there is no “Aux” option under the original Audio menu, you need to activate Aux in the Android factory settings first.
Enter the “Factory Mode” in the Android interface, click “AUX Activation”", then the original owner will automatically restart the original, after restarting you can see the “AUX” option under the “Audio” menu in the original interface.
NOTE: Different Android versions, different setup Routes:
Setup Routes 1：Settings-Factory（Key：2018）-Vehicle
Setup Routes 2：Settings-Factory（Key：2018）-Special Settings
https://www.youtube.com/watch?v=k6sPVUkM9F0 —Mercedes-Benz NTG4.5 AUX activation operation video
Note: Only cars with Mercedes Benz NTG4.5 system can activate the AUX function, which is not supported by Mercedes Benz NTG4.0 system.
6.Some car cannot active Aux, need go to “engineering mode “.
6.1.Pressing and holding the “1+#+ Answer” buttons simultaneously for 8 seconds will enter engineering mode.
6.2.Engineering mode– 7 HW Setting–7.7 HU Parameter–4.Audio AUX :ON; Engineer mode –9. System Reset
Post time: Feb-14-2025