Dear Boardmembers. first, thanks a lot the this board is existing. Hopefully someone has an idea. I am German, 47 years old and driving an 300M- 2004.
WE are just a few in Europe so some question to our german tonge can't be answered. Sorry for my typo.
Anyways:

Suddenly during drive the EVIC got dark. I unplugged battery for a while and it came back. But only for one start. Next time dark again. THe second issue:
I am not able to use the wiper, washer/wiper, not able to play around with the back buttons of steering wheel. Loud +-, Source change of Radio in general.

All other functions are working well on my car. But w/o wiper, it is winter here as well and I don't wanna watch weather channel all the time before a drive :-)

I checked the fuses and relais. I counted a hundred? For me they are fine.
What else it could be?

Thanks in advance

Alkazone