Mercedes-Benz S-class W221 (2005-2009) front central operating unit Wiring diagrams

1 2 3 4 5 6 30 CAN-B L 31 CAN-B H 3 6 CAN-A L CAN-A H BLK WIRE BLK/GRN WIRE BLK/WHT WIRE BLU WIRE BLU/GRN WIRE BRN WIRE BRN/RED WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM FRONT CENTRAL OPERATING UNIT LEFT FRONT SEAT MASSAGE CUSHION VALVE GROUP LOWER MASSAGE ROW 1 PIEZO VALVE LOWER MASSAGE ROW 2 PIEZO VALVE LOWER MASSAGE ROW 3 PIEZO VALVE LOWER MASSAGE ROW 4 PIEZO VALVE LOWER MASSAGE ROW 5 PIEZO VALVE LOWER MASSAGE ROW 6 PIEZO VALVE NCA WIRE ORG/GRN WIRE ORG/WHT WIRE RED/WHT WIRE UPPER MASSAGE ROW PIEZO VALVE WHT WIRE WHT/GRN WIRE YEL WIRE YEL/GRN WIRE

1 2 CAN-C L CAN-C H COMPUTER DATA LINES SYSTEM 55 42 CAN-C L CAN-C H 6 12 4 1 CAN-B L CAN-B H 30 31 AUTOMATIC CHILD SEAT RECOGNITION AIRBAG OFF IND LAMP BLK WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/GRY WIRE BRN/RED WIRE CAN-F H CAN-F L CAN-H H CAN-H L 31 COCKPIT SWITCH GROUP COMAND COMAND DISPLAY DISPLAY SWIVEL SWIVEL LEFT RIGHT SWITCH SWITCH COMAND DISPLAY DIMMER COMPUTER DATA LINES LINES SYSTEM COMPUTER DATA LINES SYSTEM DISTRONIC (DTR) CONTROL UNIT (UNDER PLATE IN RIGHT FRONT FOOTWELL) DTR RADAR SENSOR DTR WARNING LAMP IND ELECTRIC CONTROL UNIT ESP LEVEL OFF ADJUSTMENT SWITCH SWITCH EXTERIOR LIGHTS SYSTEM INSTRUMENT CLUSTER SYSTEM FREELY PROGRAMMABLE BUTTON FRONT CENTRAL OPERATING UNIT FRONT SAM CONTROL FUSE 40 MODULE WITH FUSE, RELAY MODULE FUSE 66 GRN WIRE GRY WIRE GRY/RED WIRE GRY/YEL WIRE HAZARD WARNING SYSTEM BUTTON HOT AT ALL TIMES 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 SWITCH, CONTROLS ILLUMINATION/ NIGHT VISION ASSIST DISPLAY DIMMER UPPER CONTROL PANEL CONTROL MODULE VIO WIRE VIO/WHT WIRE YEL WIRE YEL/BLK WIRE YEL/WHT WIRE

11 10 CAN-E L CAN-E H 12 13 CAN-F L CAN-F H 2 4 5 10 7 9 SW 6 SW 4 CAN G L CAN G H SW 3 SW 1 6 12 2 8 7 CAN-B L CAN-B H ANALOG CLOCK BLU WIRE BRN WIRE BRN/GRY WIRE BRN/RED WIRE COCKPIT SWITCH GROUP COMBINATION SWITCH COMPUTER DATA LINES SYSTEM ELECTRIC PARKING BRAKE CONTROL UNIT ELECTRIC PARKING BRAKE SWITCH EXTERIOR LAMP SWITCH FRONT CENTRAL OPERATING UNIT GRN WIRE GRN/BRN WIRE GRN/WHT WIRE GRY/BLU WIRE GRY/BRN WIRE GRY/RED WIRE GRY/YEL WIRE HAZARD WARNING SYSTEM BUTTON HEADLAMP FLASHER/ HIGH BEAM SWITCH INSTRUMENT CLUSTER INSTRUMENT CLUSTER SYSTEM LEFT TURN IND LEFT, RIGHT TURN SIGNAL SWITCH LOW BEAM SWITCH RED WIRE RED/WHT WIRE RIGHT TURN IND SOUNDER- STEERING COLUMN MODULE (AT TOP OF STEERING COLUMN) UPPER CONTROL PANEL CONTROL MODULE VIO/BRN WIRE WINDSHIELD WASHER SYSTEM SWITCH WIPE SWITCH 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 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 BLK WIRE BLK/WHT WIRE BRN WIRE BRN/BLK WIRE BRN/RED WIRE COMAND CONTROL UNIT COMAND DISPLAY FRONT CENTRAL OPERATING UNIT GRN WIRE OVERHEAD CONTROL PANEL CONTROL MODULE (CENTER FRONT OF ROOF) PTS CONTROL MODULE (IF EQUIPPED) RCP (HBF) CONTROL MODULE REAR AC CONTROL MODULE (IF EQUIPPED) REAR SEATS CONTROL MODULE 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) SPECIAL VEHICLE MULTIFUNCTION CONTROL MODULE (SVMCM (MSS)) (IF EQUIPPED) TELEMATICS CAN VOLTAGE DISTRIBUTOR CONNECTOR TLC (HDS) CONTROL MODULE (W/ REMOTE TRUNK LOCKING) TPM CONTROL MODULE (IF EQUIPPED) VOLTAGE DISTRIBUTOR CONNECTOR WSS CONTROL UNIT (WEIGHT SENSING SYSTEM) YEL WIRE

1 2 CAN B L CAN B H 3 6 CAN-A L CAN-A H BLK WIRE BLK/WHT WIRE BRN WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE CAN B H CAN B L CAN-F H CAN-F L CENTRAL GATEWAY CONTROL MODULE COMPUTER DATA LINES SYSTEM EARLY PRODUCTION FLAT WIRE FLAT WIRE FLAT WIRE 1 2 3 UB 31 DATA FRONT CENTRAL OPERATING UNIT FRONT SAM CONTROL MODULE W/ FUSE/ RELAY MODULE GRN/BLK WIRE GRN/BLU WIRE GRN/GRY WIRE GRN/PNK WIRE GRN/RED WIRE GRN/WHT WIRE GRY/BLK WIRE GRY/GRN WIRE GRY/RED WIRE LATE PRODUCTION MEMORY 1, 2, 3 SWITCH 1 2 3 MEMORY STORE BUTTON SWITCH RED/GRN WIRE RED/WHT WIRE RED/YEL WIRE RIGHT FRONT DOOR CONTROL MODULE (IN RIGHT FRONT DOOR) RIGHT FRONT SEAT CONTROL MODULE RIGHT FRONT SEAT OPERATION SWITCH GROUP RIGHT REAR FOOTWELL LAMP SEATS SYSTEM VIO/GRY WIRE YEL WIRE YEL/WHT WIRE

1 2 3 31 LIN-BUS 30 1 2 3 4 5 6 7 8 31 PROGKEY CAN-A L WBS-OUT 30 CAN-A H WBS-IN WBS-LED 13 3 CAN-A L CAN-A H ANTENNA SPLITTER BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE BRN/RED WIRE BUTTON MUTE BUTTON "ON" CAN B H CAN B L CAN D H CAN D L COMAND CONTROL UNIT COMPUTER DATA LINES SYSTEM DISC/RADIO QUICK VOLUME SELECT CONTROL BUTTON EMERGENCY CALL SYSTEM CONTROL UNIT FREELY TURN/ PROGRAMM- PUSH ABLE CONTROL BUTTON FRONT CENTRAL OPERATING UNIT GPS ANTENNA (AT REAR CENTER OF ROOF) GRN WIRE GRY WIRE GRY/WHT WIRE HAZARD BUTTON WARNING "BACK" SYSTEM BUTTON HEAD TRANSMISSION RESTRAINT MODES FOLDING BUTTON BUTTON NCA WIRE PORTABLE CTEL ANTENNA AMPLIFIER RED WIRE RED/WHT WIRE SOUND AMPLIFIER MICROPHONE TELEPHONE KEYPAD UHI PORTABLE CTEL HOLDER (UNIVERSAL HANDY INTERFACE) UNIVERSAL PORTABLE CTEL INTERFACE (UPCI (UHI)) CONTROL MODULE UPPER CONTROL PANEL MODULE VIO WIRE WHT WIRE WHT/YEL WIRE YEL WIRE YEL/BLK WIRE