99benzC280

Ok I'm new here. Glad to be a part of the forum. I have a 99 c280 and my slectronics have been acting up for the longest time. Some times EVERYTHING works but then the next day 2 Speakers don't work, trunk takes long to unlock, electronic seats dont work, and sunroof don't work. They all stop working at the same time and all start working at the same time. Already checked fuses in trunk and engine bay. Those are solid. And i know it's some other problem than the speakers being blown cause I've replaced them and still no. Is this a common thing? I don't know? Any solutions? Any help will be nice.

PJmak

Check your ground wires.

I had weird electrical issues and found out my engine to chassis ground wire was broken.

Its connected from the back of the steering pump to the frame