Backup Camera interface for Audi A3 Q2 Q3 Q7 A4 A6 A7 S6 mib1 mib2 8.3/7inch OEM
Parking Camera/Reversing Camera/Rearview camera interface
Dynamic Trajectory guideline/front camera input/extra video input for DVD example(this function depends on car model)

We have published a video in listing, if you can not watch it on mobile APP, please visit ebay website to watch the video for more details. Or youtube video:  https://youtu.be/48_Zoo8YGoM 

If you are not sure about your cars, we just need to know the following steps:
1, which car year model?  for example,  2019 A3
2, What kind of head unit system in your car? for example, MIB 1 or MIB 2
3, which size of your OEM monitor? for example: 8.3 inch or 7 inch
4, Do you already have rear view camera with RCA output NTSC format? 
If yes, you only need the interface. 
If no, you can check our 3 camera models in the following list: 
1, 2 screw model (old) https://www.ebay.com/itm/175281993848   2 screws version 
2, 2 clip-on model (new) https://www.ebay.com/itm/185426797336 2 clip-on version 
3, special 2 corners (newer)  https://www.ebay.com/itm/185442831031  speical 2 corners version 

Step by step installation: 
1, plug 12volt power+ connector to fuse box to get 12volt  power
2, connect GND with ground ( like screw in my eBay list picture)
3, connect Can Bus plug
4, connect LVDS plug, to head unit LVDS port 
5, Connect your camera
6,  set dip switch
7, put in reverse gear
8, if car is manual transmission, connect blue wire trigger wire with reverse light signal+! 
Because manual transmission car has no Can Bus signal on head unit 
9, Press ' * ' spare function button or "iNav' spare function button on steering wheel control to switch video input, 

If car has no "*" spare function button or "iNav' spare function button, can not switch other video input.