Me trying to solve the interference of the reverse camera, has led me to a new project: I'm retrofitting almost all my light bulbs. I started with the headlight's, using a in Germany road legal Philips H4-LED.
Then I finally changed the reverse light to LED, by which I kinda forgot already why I wanted to do it in the first place. To see if it could help with the interference, but it didn't sadly.
And after that I got the idea, to also do the taillights and domelight. For the taillights I used Osram LEDriving.
The domelight was the cheapest, and actually the LED light I was most surprised by.
I still have ordered more: some indicators, brighter reverse light. And LEDs for the license lights. But I still haven't solved the issue with interference, which I'm going give a last try before or after my holiday. ( I'm actually going to Hongkong China, to visit my parents in law. But order stuff from AliExpress is easier, and more convenient than searching for it in Hongkong )
I have ordered a 5m power cable, a relay and cable which allows me to tap into the fuse box and get a clean 12v. But before I will pull another wire through the car: I will first test my theory, by hooking the reverse camera up to a small 12v battery and then run the engine. When the interference is gone, than it's definitely an issue with power coming from the reverse light. If the interference stays, than it must be EMI interference.
Other than this, the headunit is working like a dream. Once you get used to the silly bugs, it's actually isn't bad at all.