Just bought a 2002 clk430 and love it. Last week the car started making all kinds of noise beeps etc like the SOS button was pushed and the lcd and all lights on the radio went out. the dash command says radio off. but the radio cd etc still works and i can still control it through stering wheel. took it in to dealer and they "THINK" its the head unit for 673 bucks i can find out . anyone else have this sort of problem. thanks in advance