PeachParts Mercedes-Benz Forum - View Single Post - 1986 Mercedes 300 SDL Radio Wiring

STORMINORMAN · #2 09-07-2014, 05:06 PM

Depending on which radio you had originally there are a couple possibilities: if these are the only wires, then...

BROWN on most of the MB radios is almost always GROUND

RED/WHITE s/b constant 12v+

A single BLUE wire, usually in a separate black sheath is usually the antenna

VIOLET/GRAY & WHITE /BLACK in your case are most probably the radio's "front" (main, if you prefer) left and right (+) channels.

If you have a fader there are probably 6/8 wires attached: usually this would be the 2 channels coming in and 4 going back.

No fader means you probably don't have the rear amps: is there a fader on the old radio?

GOOD IDEA TO TRY AND LOCATE THE MB WIRING DIAGRAM FOR YOUR YEAR AND RADIO: You could try putting power and a ground to the new unit and see if the lights come on and antenna responds. Then see if you can get sound from a speaker.

GOOD LUCK!