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????

 

u have a search problem....

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