Q:

I have about 3 second delay in the Android mode. When i use the OEM screen (Radio, cd, phone etc), there isn’t delay, when I use Android screen there is a late in the sound output of about 3 second.

A:

Sound delay is caused by some brand of original OEM headunit, solution is to use DSP amplifier directly, not use USB-Aux audio converter, please check the following link for it:
https://www.koason.com/products/koason-dsp-amplifier-box-for-mercedes-benz-ntg5-android-screen?spm=..collection_7f4a98a2-b3e6-4404-bb75-4357c54271de.collection_detail_1.6&spm_prev=..index.header_1.1