despicable merc

The other day i started the car and radio started as usual I've decided to turned it off and i did a few seconds later i realized that it didn't just turned off but something serious happened.. I've tried to turn it on but instead of music i only get Mercedes Logo a few noises from cd changer and cassette deck. Backlight on controls doesn't work. I pulled a radio fuse, agw fuse, cd changer fuse, disconnected batter nothing helps. When i pull cd changer fuse it starts to make noises(checking disks or something) i pressed SOS and all of the speakers make beep noise. So i assume speakers are fine. Digital dash says " Audio-----"

Help!