i am having problems with my radio when the key is off the radio will still turn on and it didnt always do this but it just started for a while it would turn on when the doors opend and then now it like always on i tested the speaker output and it lights up a 12 light bulb fully sombody help me please
thanks

For quite some years the MB radios turn on without ignition, but will turn off after one hour.

it is a pioneer radio

Mike, I've got a 190 E 1993 2.3, the problem I have with my radio is:
1) when I turn the key off, sporadically, an alarm
beeps continuously (matching the flashing of the red LED light on the radio volume knob itself) and remains on until I turn the key back on. Can't figure that one out for the life of me.

2) I recently had it in the shop for door and window body repair, since I got it back and entered my security code to activate the radio, the power comes on and all functions operate properly EXCEPT there is no sound (severely muted, sounds like amplifier might be blown or something). Ever seen something like this? If so, what di you do?