2003 clk 500 radio not working

SOURCE: 1998 - 2002 Honda Cassette 6 disk CD changer Radio

the cd changer is malfunctioning, the factory cd changers usually don't last that long because of the heavy use and many mechanical puts

SOURCE: Jeep RDS CD Problem

Did you change the battery ? If so try disonnecting and reconnecting the CD changer.

SOURCE: 2004 clk 500 unsteady idle rpm, could it be the

RUN down to Advance Auto Parts and buy a can of "SeaFoam" and add to your gas tank per instructions...drive for at least 100 miles and the problem should be gone. If not, one or more of your O2 sensors are most-likely fouled (lousy fuel quality these days).
Good Luck

SOURCE: my radio is muted and will not unmute .

LOOK IN GLOVE COMPARTMENT.FOR THE OWNERS MANUAL.IT WILL TELL YOU HOW TO PROGRAM OR REPROGRAM YOUR RADIO.IF YOU DONT HAVE A OWNERS MANUAL.YOU WILL HAVE TO GO TO THE MERCEDES BENZ DEALERSHIP.THEY PROBABLY CAN PROGRAM IT SO YOU WILL HAVE SOUND.ALSO CHECK FOR A MUTE BUTTON.ON RADIO PRESS IT .YOU COULD ACCIDENTALLY HIT THE MUTE BUTTON AND SILENT RADIO.IF MUTE BUTTON DONT HELP.ITS PROBABLY A DEALERS FIX.I TELL YOU BACK IN 60S 70S 80S YOU COULD GO TO RADIO SHACK BUY PIONEER AND ALPINE RADIO PUT IT IN YOUR CAR.TURN IT ON.DIDNT HAVE TO PROGRAM CODE IT. LIKE THESE NEW RADIO SYSTEM.

SOURCE: 6 disk CD changer in 2004 Chevy Suburban

I am having the same problem with my CD changer in a 2004 Suburban. Have you found a solution yet? Chevy dealership told me that I would have to replace the radio.