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Hello I am currently trying to install a aftermarket screen in my w204 c63. Everything went fine except for getting sound to work through the MMI connector in my glovebox. I pulled the glovebox out and the wire loom spits into two wires there is a black wire that has a green plug that goes into the back of the CD player but the main MMI wire isn't plugged in to anything its just sitting behind the glove box not plugged in. Does anyone know where this wire goes so i can fix my MMI?
