Can someone tell me if there such a wire that turns the fm booster in c- pillar on . If so what color wire is it and is it coming into the factory harness along the fiber optic wires. I installed n aftermarket radio in my 06 mercedes Cls 500 and the radio reception is terrible . Only one station is clear . Any help info you can give me would be great . I think you posted something regarding this mbworld but I can't find anything in the c-pillar . My email is [email protected] . Those are zeros in my email address .