Q: why speaker dont make any sound on 2001 Mercedes-Benz S600

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the radio is look is working
(2) Answers
(1) Comments
Could be the radio is bad, or if it has an amplifier it can be bad too, of there can be a wiring issue. It will need to be diagnosed to know for sure.
Mine did the same thing. It did it a couple times then it would eventually come back on. Check that out. I was told that the amp goes bad when that happens. I never check it out. Then I had a problem with something killing the battery with the engine even off. After a month of research they found out it was the radio. The motherboard in the radio was destroyed. It took two batteries and a month of analysing to found out.
what did you do to the motherboard? did you have it replaced? mine is doing the same thing right now.