Mercedes-Benz S-class W221 facelift (2009-2013) (left side of trunk) Wiring diagrams

ANT ANTENNA SPLITTER BLK WIRE BRN WIRE BRN/BLK WIRE BRN/GRY WIRE COMAND CONTROL UNIT COMPUTER DATA LINES SYSTEM EC LED TDC LED IC LED ECS ICS ICS CRASH EMERGENCY CALL SYSTEM ANTENNA SPLITTER (LEFT SIDE OF TRUNK) EMERGENCY CALL SYSTEM CONTROL UNIT (LEFT FRONT OF TRUNK) EMERGENCY CALL SYSTEM LEFT BACKUP ANTENNA (LEFT OF TRUNK) EMERGENCY CALL SYSTEM RIGHT BACKUP ANTENNA (RIGHT OF TRUNK) FUSE 138 W/ FUSE, RELAY MODULE (CENTER TRUNK) GPS ROOF ANTENNA TELEPHONE, GPS ROOF ANTENNA (GPS ROOF ANTENNA: REAR GRN WIRE GRN/RED WIRE GRY WIRE GRY/RED WIRE GRY/WHT WIRE HOT W/ CIRCUIT LSP + CAN-D H CAN-D L MIC SHIELD MIC MUTE NCA WIRE ORG/ WIRE REAR SAM CONTROL MODULE RED WIRE SOUND SYSTEMS TELEPHONE ANTENNA VIO WIRE WHT WIRE WHT/YEL WIRE YEL/BLU WIRE YEL/GRN WIRE YEL/PNK WIRE YEL/RED WIRE

BLK WIRE BLU WIRE BRN WIRE CENTER COCKPIT SPEAKER COMPUTER DATA LINES SYSTEM CRASH OUT CAN E-L CAN E-H GRN WIRE GRN/WHT WIRE GRY WIRE GRY/BLU WIRE GRY/GRN WIRE GRY/RED WIRE GRY/WHT WIRE INSTRUMENT CLUSTER SYSTEM MB-INFO, TELEDIAGNOSIS BUTTON GROUP NCA WIRE ORG/ WIRE RED WIRE RESTRAINT SYSTEMS CONTROL MODULE (FRONT OF CENTER CONSOLE) SOS PUSHBUTTON SWITCH SOUND SYSTEMS WHT WIRE YEL WIRE YEL/GRN WIRE YEL/PNK WIRE

AC RECIRCULATION UNIT, PTC HEATER BOOSTER (IF EQUIPPED) BLK WIRE BRN WIRE DC/DC CONVERTER CONTROL MODULE ELECTRIC AIR PUMP, POWER ELECTRONICS CONTROL UNIT LEFT REAR FOOTWELL POWER ELECTRONICS CONTROL UNIT RIGHT FRONT SEAT BELT COMFORT SOLENOID VACUUM PUMP RELAY

1 2 3 4 31 30 WAKE UP 1 2 MOST MOST IN MOST OUT ANT BLK WIRE BRN WIRE FUSE HIGH DEFINITION TUNER CONTROL UNIT HOT AT ALL TIMES LEFT INSTRUMENT PANEL FUSE BOX (UNDER LEFT SIDE DASH COVER) MOST DATA BUS CIRCUIT NCA WIRE ORG/ WIRE REAR WINDOW ANTENNA AMPLIFIER MODULE (REAR CENTER OF ROOF) RED/WHT WIRE SDAR ANTENNA (ON REAR DECK LID) SHIELD

1 2 3 4 5 6 7 8 9 10 11 12 FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE 1 2 3 4 5 6 7 8 ALS SER 1 2 3 4 5 CAN-B L 31 LL HR 31 DATA 30 31 AMBIENT LAMP AUTOMATIC DIMMING MIRROR BACK AUTOMATIC DIMMING INTERIOR REARVIEW MIRROR SENSOR BLU WIRE BRN WIRE BRN/RED WIRE BUTTON 1 CAN-B H 31 30 COMPUTER DATA LINES SYSTEM DOOR CONTACT ON/OFF SWITCH ELECTRIC PARKING BRAKE SWITCH EMERGENCY CALL SYSTEM CONTROL UNIT (LEFT FRONT OF TRUNK) FLAT WIRE FLAT WIRE FLAT WIRE 3 2 1 FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE FORWARD AUTOMATIC DIMMING INTERIOR REARVIEW MIRROR SENSOR FRONT DOME LAMP FRONT DOME LAMP SWITCH FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR ENGINE COMPT) FUSE 126 GARAGE DOOR OPENER GARAGE DOOR OPENER BUTTON 2 GARAGE DOOR OPENER BUTTON 3 GARAGE DOOR OPENER INDICATOR LAMP GARAGE DOOR OPENER TRANSMITTER UNIT (INSIDE REARVIEW MIRROR) GRN WIRE GRY WIRE GRY/BLU WIRE HOT AT ALL TIMES INSIDE REARVIEW MIRROR UNIT LEFT FRONT READING LAMP SWITCH LEFT READING LAMP LEFT REAR FOOTWELL LL HR MB-INFO, TELEDIAGNOSIS BUTTON GROUP NCA WIRE OVERHEAD CONTROL PANEL CONTROL MODULE (CENTER FRONT OF ROOF) REAR DOME LAMP, SWITCH REAR ROLLER SUN BLIND SWITCH REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (CENTER TRUNK) RED WIRE RED/GRY WIRE RIGHT FRONT READING LAMP SWITCH RIGHT READING LAMP ROOF SWITCH SOS PUSHBUTTON SWITCH YEL WIRE YEL/GRN WIRE YEL/PNK WIRE

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 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 111 FUSE BOX (UNDER LEFT SIDE DASH COVER) GRN WIRE GRN/BLU WIRE GRY WIRE GRY/GRN WIRE GRY/RED WIRE GRY/WHT WIRE HOT AT ALL TIMES LEFT FRONT DOOR SOUND WOOFER, MIDRANGE SPEAKER GROUP MIDRANGE SPEAKER (+) 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 SPEAKER VIO WIRE VL + VL - HL + HL - HR + HR - VR + VR - 31 WHT/GRN WIRE WOOFER WOOFER LEFT FRONT DOOR SOUND TWEETER

"FORWARD" BUTTON 1 2 3 31 LIN-BUS 30 13 3 CAN-A L CAN-A H 31 PROGKEY CAN-A L WBS-OUT 30 CAN-A H WBS-IN WBS-LED 5 13 16 6 7 LSP+ LSP- ANTENNA SPLITTER BACK BUTTON BACKREST SIDE SEAT CONTOUR BUTTON BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE BRN/RED WIRE BUTTON "BACK" BUTTON "ON" CAN B H CAN B L CAN D H CAN D L CENTER CONSOLE BUTTON GROUP COMAND CONTROL UNIT COMPUTER DATA LINES SYSTEM DISC/RADIO QUICK SELECT BUTTON EMERGENCY CALL SYSTEM CONTROL UNIT (LEFT FRONT OF TRUNK) FIRM MASSAGE FUNCTION BUTTON FREELY PROGRAMM- ABLE BUTTON FRONT CENTRAL OPERATING UNIT GENTLE MASSAGE FUNCTION BUTTON GPS GRN WIRE GRY WIRE GRY/RED WIRE GRY/WHT WIRE HAZARD WARNING SYSTEM BUTTON HEAD RESTRAINT FOLDING BUTTON INCREASE VOLUME BUTTON LEFT "BACK" BUTTON LEFT REAR FOOTWELL LEFT SCREEN BUTTON LEFT SEAT SELECTION CAN-AL CAN-AH BUTTON LUMBAR SUPPORT HEIGHT ADJUSTMENT BUTTON LUMBAR SUPPORT SEAT CONTOUR BUTTON MULTI- CONTOUR SEAT QUICK SELECT BUTTON NCA WIRE PORTABLE CTEL ANTENNA AMPLIFIER (LEFT SIDE OF TRUNK) RCP(HBF) CONTROL UNIT REAR TURN/ FUSH CONTROL REAR WINDOW ROLLER SUN BLIND BUTTON RED WIRE RED/WHT WIRE REDUCE VOLUME BUTTON RIGHT "BACK" BUTTON RIGHT SCREEN BUTTON RIGHT SEAT SELECTION BUTTON TELEPHONE, GPS ROOF ANTENNA TELEPHONE/ NAVIGATION QUICK SELECT BUTTON TRANSMISSION MODES BUTTON TURN/ PUSH CONTROL UHI PORTABLE CTEL HOLDER (UNIVERSAL HANDY INTERFACE) UNIVERSAL PORTABLE CTEL INTERFACE (UPCI (UHI)) CONTROL MODULE UPPER CONTROL PANEL CONTROL MODULE VIO WIRE VOLUME CONTROL WHT/YEL WIRE YEL WIRE YEL/BLK WIRE

BACKUP CAMERA (LEFT CENTER OF TRUNK LID) BACKUP CAMERA VOLTAGE SUPPLY MODULE (LEFT SIDE OF TRUNK) BLK WIRE BRN WIRE COMAND CONTROL UNIT CV GND GRY/BLK WIRE NCA WIRE RED WIRE YEL WIRE

BLK WIRE BLU WIRE BRN WIRE BRN/BLK WIRE BRN/BLU WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/ORG WIRE BRN/VIO WIRE BRN/WHT WIRE BRN/YEL WIRE CENTER COCKPIT SPEAKER (CENTERFILL) CENTER SUBWOOFER+ TXD CENTER SUBWOOFER- DIGITAL SOUND PROCESSOR (LEFT SIDE OF TRUNK) EMERGENCY CALL SYSTEM CONTROL UNIT (LEFT FRONT OF TRUNK) FRT CENTER TWEETER- FUSE 84 FUSE 77 GRN WIRE GRY WIRE GRY/GRN WIRE GRY/RED WIRE GRY/WHT WIRE HOT AT ALL TIMES LEFT REAR SURROUND SPEAKER LSP + MIC IN - MOST DATA BUS CIRCUIT MUTE NCA WIRE ORG/ WIRE RED/BLK WIRE RED/GRN WIRE REMOTE WAKEUP MOST WAKEUP RH FRT WOOFER- LH FRT WOOFER- RH REAR WOOFER- LH REAR WOOFER- RIGHT INSTRUMENT PANEL FUSE BOX (UNDER RIGHT SIDE DASH COVER) SOUND AMPLIFIER MICROPHONE VIO WIRE WHT WIRE YEL WIRE

BASS MODULE SPEAKER BLK WIRE BLU WIRE BRN WIRE BRN/BLU WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/ORG WIRE BRN/VIO WIRE BRN/WHT WIRE BRN/YEL WIRE GRN WIRE GRY WIRE LEFT FRONT DOOR SPEAKER LEFT FRONT DOOR WOOFER LEFT REAR DOOR WOOFER ORG/ WIRE RED WIRE RED/BLK WIRE RIGHT FRONT DOOR SPEAKER RIGHT REAR DOOR WOOFER RIGHT REAR SURROUND SPEAKER SOUND AMPLIFIER (LEFT SIDE OF LUGGAGE COMPT) VIO WIRE WHT WIRE YEL WIRE