Mercedes-Benz S-class W221 facelift (2009-2013) Most data bus circuit

1 2 IN OUT 1 2 MOST 5 IN OUT 1 MOST IN 2 1 OUT IN AUDIO TUNER CONTROL UNIT COMAND CONTROL UNIT HIGH DEFINITION TUNER CONTROL UNIT (IF EQUIPPED) MEDIA INTERFACE CONTROL UNIT (IF EQUIPPED) MOST ORG/ WIRE OUT WAKE UP CA WAKE-UP