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S-Class (W221) 2007-2013: S 320 CDI, S 350, S 450, S 500, S 550, S 420 CDI, S 600

Sound problem

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Old Feb 26, 2024 | 04:45 PM
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W221
Sound problem
Hi guys I have 2007 mercedes s550 and I have problem with sound and radio . I check the optical cable with bypass cable but nothing happen /no sound or radio station/ my car have 3 modules in the trunk . All three modules blinking red.the optical cable signal coming from cd unit and the voice control unit send back the signal to the cd unit everywhere is blinking red .
all fuse is checked/73,104,107,119,121,122,131/
the harman kardon amp fan is not spining but optical is blinking. Any idea????
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Old Feb 26, 2024 | 05:52 PM
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u have a search problem....

https://mbworld.org/forums/s-class-w...agnostics.html
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