Mercedes-Benz S-class W221 facelift (2009-2013) computer data lines system Wiring diagrams

1 2 3 4 5 6 7 8 9 10 11 12 30 31 (+) CAN-I H 1 2 3 4 HV + HV - INTER LOCK OUT INTER LOCK IN 15 CAN-I L 6 21 20 8 9 30 INTERLOCK OUT 87 CANIH CANIL BATTERY MANAGEMENT SYSTEM CONTROL UNIT (RIGHT REAR ENGINE COMPT) BLK WIRE BLU WIRE BLU/YEL WIRE BRN WIRE COMPUTER DATA LINES SYSTEM CONTACTOR DC/DC CONVERTER CONTROL MODULE (RIGHT FRONT WHEELHOUSE) FUSE FUSE FUSE GRN WIRE GRN/RED WIRE GRN/WHT WIRE HIGH VOLT BATTERY COOLING SYSTEM SHUTOFF VALVE HIGH VOLTAGE BATTERY HIGH VOLTAGE FUSE BOX (CENTER REAR OF ENGINE COMPT) HOT AT ALL TIMES INTER LOCK IN 30 INTER LOCK OUT ME-SFI (ME) CONTROL MODULE (RIGHT REAR OF ENGINE COMPT) NCA WIRE PNK/BLK WIRE PNK/BLU WIRE PNK/GRN WIRE POWER ELECTRONICS CONTROL UNIT (RIGHT SIDE UNDER CARRIAGE) PYROTECHNICAL SEPARATOR (UNDER RIGHT RED WIRE RED/BLK WIRE RED/BRN WIRE RED/GRN WIRE RED/YEL WIRE RESTRAINT SYSTEM CONTROL MODULE (FRONT OF CENTER CONSOLE) RIGHT INSTRUMENT PANEL FUSE BOX (UNDER RIGHT SIDE DASH COVER) SIDE OF DASH) YEL/RED WIRE

1 2 3 4 5 6 7 8 9 10 11 AUDIO LEFT AUDIO RIGHT 1 2 3 4 5 6 7 8 9 10 11 CAN F H 1 2 3 4 LVDS RX- GROUND LVDS RX+ GROUND 1 2 MOST IN MOST OUT 5 3 (NOT USED) 6 4 2 PNK WIRE ANTENNA SPLITTER AUDIO IN R AUDIO OUT L AUDIO OUT L AUDIO OUT L AUDIO OUT R AUDIO-IN L BACKUP CAMERA VOLTAGE SUPPLY MODULE (IF EQUIPPED) (LEFT SIDE OF TRUNK) BLK WIRE BLK/WHT WIRE BLU WIRE BLUETOOTH ANTENNA BRN WIRE CAN A H CAN A L COMAND CONTROL UNIT COMPUTER DATA LINES SYSTEM FUSE 122, RELAY MODULE (CENTER TRUNK) FUSE 99 GRN WIRE GROUND GROUND SHIELD 12 13 14 HANDS-FREE SYSTEM MICROPHONE GROUP (PART OF INTERIOR REARVIEW MIRROR) HEADPHONES CONNECTING POINT HOT AT ALL TIMES HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED LEFT INSTRUMENT PANEL FUSE BOX (UNDER LEFT SIDE DASH COVER) MC 1 MC 2 PNK WIRE MC GND MC SHIELD MEDIA INTERFACE CONNECTOR MOST DATA BUS CIRCUIT NCA WIRE ORG/ WIRE PNK WIRE REAR SAM CONTROL MODULE W/ FUSE/ RED/BLU WIRE SHIELD SHIELD BLUETOOTH SHIELD GPS USB (UNIVERSAL SERIAL BUS) CONNECTOR W/O MEDIA INTERFACE WAKE UP 30 CAN F L WALKMAN SEPARATION POINT WHT WIRE WHT/YEL WIRE YEL WIRE YEL/WHT WIRE

1 2 3 4 5 6 HS-UB 1 2 3 4 CAN-B L CAN-B H 31 30 1 2 4 3 CAN-B L CAN-B H 30 31 4 3 2 1 DATA UB 31 31 4 5 6 3 2 1 MOTOR MOTOR HS (-) HS 1 HS 2 HS-UB 4 5 6 3 2 HS-UB 31 FH-MOT+ HS 2 HS 1 (OR PNK) WIRE BLK WIRE BLK/BLU WIRE BLK/BRN WIRE BLK/GRN WIRE BLK/VIO WIRE BLU WIRE BRN WIRE BRN/RED WIRE COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM 4 3 FH-MOT+ FH-TIEF HF-HOCH 31 UB DATA FRONT PASSENGER POWER WINDOW SWITCH FUSE 70 FUSE 82 GRN WIRE GRN/BLU WIRE GRN/GRY WIRE GRY WIRE GRY/WHT WIRE HOT AT ALL TIMES HS MOTOR + MOTOR + 31 LEFT REAR POWER WINDOW, SIDE WINDOW ROLLER BLIND SWITCH NCA WIRE PNK W/ SPECIAL PROTECTION WIRE PNK WIRE PNK/GRY WIRE PNK/WHT WIRE REAR INDIVIDUAL POWER WINDOW SWITCH REAR SIDE ROLLER BLIND/ROOF ROLLER BLIND/REAR ROLLER BLIND REAR WINDOW ROLLER BLIND SWITCH RED WIRE RED/BLU WIRE RIGHT FRONT DOOR CONTROL MODULE (IN RIGHT FRONT DOOR) RIGHT FRONT HYDRAULIC WINDOW LIFTER FUSE RIGHT FRONT HYDRAULIC WINDOW LIFTER PRESSURE SWITCH RIGHT FRONT WINDOW CLOSED HYDRAULIC WINDOW LIFTER LIMIT SWITCH RIGHT FRONT WINDOW CLOSED HYDRAULIC WINDOW LIFTER REDUNDANCY LIMIT SWITCH RIGHT INSTRUMENT PANEL FUSE BOX (UNDER RIGHT SIDE DASH COVER) RIGHT REAR DOOR CONTROL MODULE (IN RIGHT REAR DOOR) RIGHT REAR HYDRAULIC WINDOW LIFTER FUSE RIGHT REAR HYDRAULIC WINDOW LIFTER PRESSURE SWITCH RIGHT REAR POWER WINDOW MOTOR (IN RIGHT REAR DOOR) RIGHT REAR POWER WINDOW SWITCH RIGHT REAR SIDE ROLLER BLIND MOTOR (IN RIGHT REAR DOOR) RIGHT REAR WINDOW CLOSED HYDRAULIC WINDOW LIFTER LIMIT SWITCH RIGHT REAR WINDOW CLOSED HYDRAULIC WINDOW LIFTER REDUNDANCY LIMIT SWITCH VIO WIRE VIO/GRN WIRE W/ SPECIAL PROTECTION W/ TOP PROTECTION W/O TOP PROTECTION W/O SPECIAL PROTECTION WHT GRY/ WIRE WHT PNK/ WIRE WHT WIRE YEL WIRE

2 AM/FMM ANT BASS MODULE SPEAKER BLK WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/WHT WIRE CAN B H CAN B L CC 1 2 3 4 5 COMPUTER DATA LINES SYSTEM FUSE 119 FUSE 129 FUSE 131 FZV GRN WIRE GRY WIRE GRY/RED WIRE HIGH DEFINITION TUNER CONTROL UNIT HOT AT ALL TIMES KEYLESS GO CONTROL MODULE (IF EQUIPPED) (RIGHT REAR TRUNK) LEFT REAR SURROUND SPEAKER NCA WIRE REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE REAR WINDOW ANTENNA AMPLIFIER MODULE (REAR CENTER OF ROOF) RED WIRE RED/BLK WIRE RED/GRN WIRE RED/VIO WIRE RED/WHT WIRE SHIELD TWEETER LEFT REAR DOOR SPEAKER GROUP TWEETER RIGHT REAR DOOR SPEAKER GROUP VIO WIRE WHT WIRE WHT/GRN WIRE WOOFER

"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

BRN WIRE BRN/YEL WIRE CAN B H CAN B L CHASSIS CIRCUIT 87 RELAY COMPUTER DATA LINES SYSTEM ELECTRIC PARKING BRAKE CONTROL UNIT (LEFT REAR WHEELWELL) ELECTRIC PARKING BRAKE SWITCH FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR ENGINE COMPT) FUSE 35 GRN WIRE GRN/BRN WIRE GRN/WHT WIRE GRY/BLU WIRE GRY/BRN WIRE HOT AT ALL TIMES ENGINE COMPARTMENT FUSE 6 PREFUSE BOX (RIGHT REAR ENGINE COMPT) RED WIRE RED/BLU WIRE RED/YEL WIRE SW 1 CAN G H 30 SW 4 CAN G L 87 SW 3 SW 6 VIO/BRN WIRE

B H B L BELT TENSION SENSOR (RIGHT FRONT SEAT BELT ANCHOR ASSEMBLY) BLK WIRE BLK/RED WIRE BLK/VIO WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/PNK WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE BRN/BLU WIRE BRN/GRN WIRE BRN/PNK WIRE BRN/RED WIRE BRN/VIO WIRE BRN/WHT WIRE BRN/YEL WIRE CAK, FA DS, FA+ CAN L CAN H CRASH OUT CAK, BF COMPUTER DATA LINES COMPUTER DATA LINES SYSTEM CRASH DRIVER BUCKLE RIGHT REAR ETR SQUIB WINDOW AIR BAG SQUIB DS BF + DS HL+ DS HR - EXCEPT HYBRID FRONT PASSENGER BUCKLE ETR SQUIB FUSE 61 GRN WIRE GRN/VIO WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE GRY/WHT WIRE GSS, BF SS-FA GSS, FA UFS, BF HOT W/ CIRCUIT LEFT FRONT SIDE AIR BAG SQUIB LEFT REAR ETR SQUIB (LEFT "C" PILLAR) LEFT REAR RIGHT FRONT SIDE AIR BAG SIDE AIR BAG SQUIB SQUIB LEFT REAR WINDOW AIR BAG SQUIB NCA WIRE PNK/GRN WIRE PYROTECHNICAL SEPERATOR (UNDER RIGHT SIDE OF DASH) RED WIRE RED/BLU WIRE RED/GRN WIRE RED/VIO WIRE RED/WHT WIRE RED/YEL WIRE RESTRAINT SYSTEMS CONTROL MODULE (FRONT OF CENTER CONSOLE) RIGHT REAR RIGHT REAR SIDE AIR BAG ETR SQUIB SQUIB (RIGHT "C" PILLAR) SEAT OCCUPIED RECOGNITION PRESSURE SENSOR SIG SS BF + SYSTEM UFS BF + VIO/BLU WIRE VIO/GRN WIRE VIO/GRY WIRE WHT WIRE WHT/BRN WIRE WHT/GRN WIRE WHT/VIO WIRE WHT/YEL WIRE YEL WIRE YEL/RED WIRE

AIR BAG INDICATOR, WARNING LAMP INSTRUMENT CLUSTER BLK WIRE BLU WIRE BLU/PNK WIRE BLU/YEL WIRE BRN WIRE BRN/BLK WIRE BRN/BLU WIRE BRN/GRN WIRE BRN/PNK WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM DRIVER AIR BAG SQUIB 1 DRIVER AIR BAG SQUIB 2 DRIVER ASSIST AIR BAG SYSTEM DRIVER DOOR PRESSURE SENSOR (IN DRIVER DOOR) DRIVER KNEE BAG SQUIB (IF EQUIPPED) DRIVER NECK-PRO HEAD RESTRAINT SOLENOID DRIVER SEAT BELT BUCKLE, SEAT BELT WARNING SWITCH DRIVER'S SIDE FRONTAL ACCELERATION SENSOR (LEFT FRONT OF ENGINE COMPT) DRIVER'S SIDE REAR DOOR PRESSURE SENSOR (IN DRIVER'S SIDE REAR DOOR) EMERGENCY CALL SYSTEM CONTROL UNIT (LEFT FRONT OF TRUNK) FANFARE HORN, AIR BAG CLOCK SPRING CONTACT (TOP OF STEERING COLUMN) FRONT PASSENGER ASSIST AIR BAG SYSTEM FRONT PASSENGER DOOR PRESSURE SENSOR (IN FRONT PASSENGER DOOR) FRONT PASSENGER NECK-PRO HEAD RESTRAINT SOLENOID FRONT PASSENGER SEAT BELT BUCKLE, SEAT BELT WARNING SWITCH GRN WIRE GRN/VIO WIRE GRN/YEL WIRE PASSENGER SIDE REAR DOOR PRESSURE SENSOR PASSENGER'S SIDE FRONTAL ACCELERATION SENSOR (RIGHT FRONT OF ENGINE COMPT) PNK WIRE VIO WIRE VIO/GRN WIRE VIO/YEL WIRE WHT/BLK WIRE WHT/YEL WIRE YEL WIRE YEL/WHT 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

1 XI BELT TENSION SENSOR (RIGHT FRONT SEAT BELT ANCHOR ASSEMBLY) BLK/RED WIRE BLU WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE BRN/RED WIRE BRN/WHT WIRE CAN B H CAN B L COMPUTER DATA LINES SYSTEM HOT AT ALL TIMES FUSE 93 PANEL FUSE BOX (UNDER LEFT SIDE DASH COVER) LEFT INSTRUMENT NCA WIRE POWER DISTRIBUTION SYSTEM RED WIRE RED/WHT WIRE RED/YEL WIRE SEAT OCCUPIED RECOGNITION PRESSURE SENSOR SIG SIG 31 WHT WIRE WSS (WEIGHT SENSING SYSTEM) CONTROL UNIT (RIGHT FRONT SEAT)