1995 Mercedes-Benz C-Class "radio tuner lights dont work" Questions

...radio tuner works but the CD and Aux don't I have taped the wires in the back to make sure that all ARE connected. But still no such luck. I have tried two radios and both dont work.. but they do in ...

...Tuner on the radio 3. The message "check" press tuner knob 5 seg 4.the radio show 4 numbers, this number its number for activate the radio when you radio need activate, 5.press up arrow, (this is for ...

...tuner finds station scanner scans -etc. but no sound!!! got any ideas? thanks... My van radio runs on 2 different fuses- both in the fuse box under the dash. One runs the lights the other the sound. ...

...radio tuner mode (AM/FM). To enter the following tests, depress the desired preset button while in the speaker walk-around test or while in the audio unit self-diagnostic mode. To exit the audio unit ...