Most aftermarket Android head units have a user manual app installed in the unit. This manual is usually named instructions, user manual, etc. You can check all apps from your unit, and try to find the instructions app, click it, then you can check the manual, or you can copy it from the internal storage to your USB and copy it in your computer.
You can download user manual on this page for our aftermarket head units, free download.
For Lexus ES, NX, IS, GS, Ct200h, etc., user manual download link below
For BMW E46, E53, E90, E82, etc.
For Audi Q5, Q3, A5 Android head unit
- Audi Q5 A5 A4 S5 Android Navigation Head Unit User Manual – Android 4.4.4
- Audi MTK User Manual, 8″ 10.25″ Touch Screen
Car Multimedia System Android 8.0 System User Manual (for Suzuki, Toyota, Hyundai, Volkswagen, Honda, etc.)