Mercedes-Benz S-class W221 (2005-2009) audio tuner control unit Wiring diagrams

1 2 IN OUT 2 1 OUT IN AUDIO TUNER CONTROL UNIT COMAND CONTROL UNIT FIBER OPTICAL CABLE CONNECTOR (MOST) MOST ORG/ WIRE SDAR CONTROL UNIT (IF EQUIPPED) UNIVERSAL PORTABLE CTEL INTERFACE (UPCI (UHI)) CONTROL MODULE (IF EQUIPPED) VOICE CONTROL SYSTEM (VCS (SBS)) CONTROL UNIT (IF EQUIPPED) WAKE-UP

1 2 3 4 5 6 7 8 9 10 11 12 13 14 SURHL + SURHL - SURHR + SURHR - CEN + CEN - 1 2 3 4 MUTE 1 2 MOST IN MOST OUT ANTENNA AUDIO TUNER CONTROL UNIT BLK WIRE BLK/RED WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/BLK WIRE BRN/GRN WIRE BRN/VIO WIRE BRN/WHT WIRE CENTER COCKPIT SPEAKER (CENTERFILL) FUSE 104 FUSE BOX GRN WIRE GRN/BLU WIRE GRY WIRE GRY/GRN WIRE GRY/WHT WIRE HOT AT ALL TIMES LEFT FRONT DOOR SOUND TWEETER MIDRANGE SPEAKER (+) MIDRANGE WOOFER SPEAKER LEFT FRONT DOOR SOUND WOOFER, MIDRANGE SPEAKER GROUP MOST DATA BUS CIRCUIT MOST WAKE UP NCA WIRE ORG/ WIRE RED/GRN WIRE RED/WHT WIRE RIGHT FRONT DOOR SOUND TWEETER RIGHT FRONT DOOR SOUND WOOFER, MIDRANGE SPEAKER GROUP RIGHT REAR SURROUND LOUDSPEAKER SHIELD MIC - MIC + VIO WIRE VL + VL - HL + HL - HR + HR - VR + VR - 31 WHT WIRE WHT/GRN WIRE WOOFER