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Hi Sue, sorry for the long wait on this question. If you post your vin number I can check the Mercedes database for a radio code for your car in the morning.
Hi Sue, I received your vin number. I will reply back to this question tomorrow with your radio code. In the meantime, if the radio shows WAIT on the display you will need to leave the key turned on the first click and leave the radio turned on until WAIT changes back to CODE. It usually resets in an hour or two.
Marty the codes shows as 52321
Hi Sue, did you get the radio code?
Try removing fuse 9 and see if it goes off of mute. If that doesn't work try removing fuse 13.
Let me know how it goes.
Okay, there is a yellow/black wire that connects to the back of the radio. This is the mute wire. The wire needs to be disconnected from the radio. If the radio still says muted with the wire disconnected you have an internal fault in the radio.