Mercedes-Benz S-class W221 facelift (2009-2013) front central operating unit Wiring diagrams

1 2 3 FLAT WIRE FLAT WIRE FLAT WIRE UB 31 DATA 1 2 CAN B L CAN B H 12 11 16 15 CAN-F L CAN-F H CAN-B L CAN-B H 16 15 CAN-B L CAN-B H 26 25 CAN-B L CAN-B H 3 6 CAN-A L CAN-A H BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE CAN-B H CAN-B L 30 31 CENTRAL GATEWAY CONTROL MODULE (LEFT FRONT UPPER FOOTWELL) COMPUTER DATA LINES SYSTEM DYNAMIC DRIVER SEAT MASSAGE FUNCTION MAIN VALVE FORE/AFT,HIEGHT, INCLINATION ADJUSTMENT SWITCH BACKREST SWITCH FRONT CENTRAL OPERATING UNIT FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR ENGINE COMPT) GRN WIRE GRY WIRE HEAD RESTRAINT ADJUSTMENT SWITCH LEFT FRONT DOOR CONTROL MODULE (IN LEFT FRONT DOOR) LEFT FRONT DYNAMIC SEAT CONTROL MODULE LEFT FRONT SEAT MASSAGE FUNCTION ACTUATOR MOTOR LEFT FRONT SEAT OPERATION SWITCH GROUP RED WIRE RED/WHT WIRE SEAT CUSHION FORE/AFT SWITCH WHT WIRE YEL WIRE YEL/WHT WIRE

1 2 CAN-C L CAN-C H COMPUTER DATA LINES SYSTEM 10 6 12 4 1 30 CAN-B L CAN-B H 30 31 55 42 CAN-C L CAN-C H AUTOMATIC CHILD SEAT RECOGNITION AIR BAG OFF IND LAMP BLK WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/GRY WIRE BRN/RED WIRE CAN H H CAN H L CAN-F H CAN-F L COCKPIT SWITCH GROUP COMAND COMAND DISPLAY DISPLAY SWIVEL SWIVEL LEFT RIGHT SWITCH SWITCH COMAND DISPLAY DIMMER BRIGHTNESS CONTROL COMPUTER DATA LINES SYSTEM DTR CONTROL UNIT DTR RADAR SENSOR DTR WARNING LAMP IND ELECTRIC CONTROL UNIT (VGS) ESP LEVEL OFF ADJUSTMENT SWITCH SWITCH EXTERIOR LIGHTS, INSTRUMENT CLUSTER SYSTEM FREELY PROGRAMMABLE BUTTON FRONT CENTRAL OPERATING UNIT FUSE 66 GRN WIRE GRY WIRE GRY/RED WIRE GRY/YEL WIRE HAZARD WARNING SYSTEM BUTTON HOT W/ CHASIS CIRCUIT 87 RELAY ENERGIZED INSTRUMENT CLUSTER ME-SFI (ME) CONTROL MODULE (RIGHT REAR OF ENGINE COMPT) OUTPUT SPEED SENSOR PTS OFF SWITCH RED WIRE RED/BLK WIRE RED/GRN WIRE RED/WHT WIRE SIG UPPER CONTROL PANEL CONTROL UNIT VIO WIRE VIO/WHT WIRE YEL WIRE YEL/BLK WIRE YEL/WHT WIRE

1 2 CAN B L CAN B H 11 10 CAN-E L CAN-E H 12 13 CAN-F L CAN-F H 6 12 2 CAN-B L CAN-B H ADJUSTABLE, HEATED OUTSIDE MIRROR ANALOG CLOCK AUDIBLE TURN SIGNAL INDICATOR BLK WIRE BLU WIRE BRN WIRE BRN/GRY WIRE BRN/RED WIRE COCKPIT SWITCH GROUP COMBINATION SWITCH COMPUTER DATA LINES SYSTEM FOG LAMP INDICATOR FRONT CENTRAL OPERATING UNIT GRN WIRE GRN/WHT WIRE GRY/RED WIRE GRY/YEL WIRE HAZARD WARNING SYSTEM BUTTON HCS (SRA) SWITCH HEADLAMP FLASHER/ HIGH BEAM SWITCH HOT AT ALL TIMES INTERIOR PREFUSE BOX FUSE INSTRUMENT CLUSTER LEFT FRONT DOOR CONTROL MODULE (IN LEFT FRONT DOOR) LEFT TURN SIGNAL IND LEFT, RIGHT TURN SIGNAL SWITCH NIGHT VISION ASSIST BUTTON OUTSIDE MIRROR AMBIENT LAMP OUTSIDE MIRROR AMBIENT LAMP LEFT ELECTRICALLY ADJUSTABLE, HEATED OUTSIDE MIRROR OUTSIDE MIRROR TURN SIGNAL LAMP OUTSIDE MIRROR TURN SIGNAL LAMP RIGHT ELECTRICALLY REAR FOG LAMP INDICATOR RED WIRE RED/WHT WIRE RIGHT FRONT DOOR CONTROL MODULE (IN RIGHT FRONT DOOR) RIGHT TURN SIGNAL IND ROTARY LIGHT SWITCH STEERING COLUMN MODULE (TOP OF STEERING COLUMN) UPPER CONTROL PANEL CONTROL MODULE YEL WIRE YEL/BLK WIRE YEL/WHT WIRE

1 2 3 CAN-A L CAN-A H 31 1 2 3 CAN-B L CAN-B H 31 1 2 CAN B L CAN B H 1 2 CAN-A L CAN-A H 1 3 CB CAN-B L CAN-B H 12 3 CAN-B L CAN-B H 13 3 CAN-A L CAN-A H 15 14 CAN-B L CAN-B H 3 4 CAN-A L CAN-A H 3 6 CAN-A L CAN-A H 4 3 CAN B L CAN B H 4 8 CAN-A L CAN-A H 5 6 CAN-B L CAN-B H 7 9 CAN-B L CAN-B H 9 10 CAN-B L CAN-B H 9 18 CAN-B L CAN-B H BLK WIRE BLK/WHT WIRE BRN WIRE BRN/BLK WIRE BRN/RED WIRE COMAND CONTROL UNIT FRONT CENTRAL OPERATING UNIT GRN WIRE PNK/BRN WIRE PTS CONTROL MODULE (RIGHT SIDE TRUNK) RCP (HBF) CONTROL MODULE REAR AC CONTROL MODULE (IF EQUIPPED) REAR SEATS CONTROL MODULE (RIGHT SIDE OF TRUNK) RIGHT FRONT DOOR CONTROL MODULE (IN RIGHT FRONT DOOR) RIGHT FRONT SEAT CONTROL MODULE RIGHT INTERIOR CAN/FFS (RBA) RIGHT REAR DOOR CONTROL MODULE (IN RIGHT REAR DOOR) TELEMATICS CAN VOLTAGE DISTRIBUTOR CONNECTOR VOLTAGE DISTRIBUTOR CONNECTOR WEIGHT SENSING SYSTEM (WSS) CONTROL UNIT (RIGHT FRONT SEAT) YEL WIRE

4 2 3 1 CAN-B H CAN-B L BLK WIRE BLK/WHT WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/BLK WIRE BRN/GRY WIRE BRN/RED WIRE BRN/WHT WIRE CAN A H CAN A L CAN B H CAN B L CAN-B H CAN-B L 30 31 CAN-F H CAN-F L CENTRAL GATEWAY CONTROL MODULE (LEFT FRONT UPPER FOOTWELL) COMAND CONTROL UNIT COMAND DISPLAY COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM W/ MULTICONTOUR SEAT, DYNAMIC SEAT DYNAMIC FRONT PASSENGER SEAT MASSAGE FUNCTION MAIN VALVE FRONT CENTRAL OPERATING UNIT FUSE 127 GRN WIRE GRN/BLU WIRE GRN/WHT WIRE GRY WIRE HOT AT ALL TIMES LEFT REAR FOOTWELL LUMBAR PUMP (LEFT SIDE OF TRUNK) NCA WIRE ORG/ WIRE ORG/WHT WIRE REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (CENTER TRUNK) RED WIRE RED/WHT WIRE RED/YEL WIRE RIGHT FRONT DYNAMIC SEAT CONTROL MODULE RIGHT FRONT SEAT MASSAGE FUNCTION ACTUATOR MOTOR W/ LUMBAR SUPPORT SEAT WHT WIRE YEL WIRE YEL/WHT WIRE

"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

1 2 3 4 5 6 CAN-C H CAN-C L NC 87 31 NC 1 2 3 4 5 CAN C L CAN C H AUX-SPLY 30 31 6 3 COMPUTER DATA LINES SYSTEM CAN-A H CAN-A L BLK WIRE BLU WIRE BLU/WHT WIRE BRAKE CTRL SOL VLV (VGS) BRN WIRE BRN/YEL WIRE CAN B L CAN B H CAN C H CAN C L CLUTCH CLUTCH CTRL CTRL SOL VLV SOL VLV (VGS) (VGS) COMPUTER DATA LINES COMPUTER DATA LINES SYSTEM ELECTRIC CONTROL UNIT (VGS) ENGINE FRONT CENTRAL OPERATING UNIT FUSE 28 FUSE 6 COMPARTMENT PREFUSE BOX (RIGHT REAR MRI ENGINE COMPARTMENT) GEAR DISPLAY CAN-F-L CAN-F-H HOT AT ALL TIMES HOT W/ CHASSIS CIRCUIT 87 RELAY ENERGIZED HOT W/ CHASSIS CIRCUIT 87 RELAY ENERGIZED FUSE 32 INSTRUMENT CLUSTER INTELLIGENT SERVO MODULE FOR DIRECT SELECT (TRANSMISSION HOUSING) OUTPUT SPEED SENSOR (VGS) RED WIRE RED/GRN WIRE RED/VIO WIRE SELECTION RANGE SENSOR (VGS) SYSTEM TORQUE CONVERTER LOCKUP CLUTCH CTRL SOL VLV (VGS) TRANSMISSION MODE DISPLAY TRANSMISSION MODES BUTTON TRANSMISSION OIL TEMP SENSOR (VGS) TURBINE INTERNAL SPEED SPEED SENSOR SENSOR (VGS) (VGS) YEL WIRE YEL/RED WIRE YEL/WHT WIRE