I got an Android Screen Car Navigation Head unit from China...

[Helipedia]

The seller at navicar provided a software update for the head unit and information how to change the wiring of their new switch. Here's a link to the info I have and videos of the process.
Following this made the supplied hazard switch work the hazard lights. I did not get the switch itself to flash though.
Navicar update.zip

I just updated the head unit with the .bin-file and the hazard works now without modifying the wires... I am happy now! Take care that the USB stick isn´t too large - will not work!

 

[Helipedia]

Now I can move on to the next problem, the lighting of the buttons and switches! Does anyone have instructions for me?