I have a 99 C280 that just picked up an audio problem. I think that when I bought the car One month ago it had a buzz in the back speakers. I thought I would replace those next month but in the mean time I would just fade out the rear speakers and listen only through the front speakers.
Today I heard the left front speaker and not the right that came in a little later just fine. Not thinking about it too much I let it go. When I got to the house I noticed that there was a crackling sound coming from the right side and then it moved to the left and then no sound at all.
I hope that I have not blown the system. I guess I will look for help tomorrow in one of the shops close by.