Mercedes-Benz S-class W221 facelift (2009-2013) (under left front seat) Wiring diagrams

1 2 3 4 CAN-B L CAN-B H 31 30 1 2 ROTARY TUMBLER SWITCH 1 2 SIG (-) 2 1 FLAT WIRE FLAT WIRE 3 4 2 1 FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE 31 58 58 31 3 4 FLAT WIRE FLAT WIRE 31 15 4 5 MOTOR MOTOR 4 5 SVS-MOT SVS-MOT 7 8 FLAT WIRE FLAT WIRE 9 10 1 2 4 8 3 TZS-MOT TZS-MOT ZV-MOT ZV-MOT 31 31 DFK BLK WIRE BLU WIRE BRN WIRE BRN/RED WIRE CL (ZV) MOTOR COMPUTER DATA LINES SYSTEM DATA 31 15 FLAT WIRE FLAT WIRE DOOR ADDITIONAL LOCK MOTOR DRIVE LOCK PAWL SWITCH DRIVER DOOR INFRARED SENSOR FLAT WIRE FUSE 80 FUSE 82 FUSE 70 FUSE 81 GRN WIRE GRN/BRN WIRE GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES KEYLESS GO SYSTEM CIRCUIT LEFT FRONT DOOR CONTROL MODULE (IN LEFT FRONT DOOR) LEFT FRONT DOOR ENTRANCE, EXIT LAMP LEFT FRONT DOOR INSIDE HANDLE ILLUMINATION LEFT FRONT DOOR LOCK UNIT LEFT FRONT DOOR TRIM STRIP ILLUMINATION LAMP 1 LEFT FRONT DOOR WARNING LAMP LEFT REAR DOOR CONTROL MODULE LEFT REAR DOOR ENTRANCE, EXIT LAMP LEFT REAR DOOR LOCK UNIT LEFT REAR DOOR TRIM STRIP ILLUMINATION LEFT REAR DOOR WARNING LAMP LEFT REAR INSIDE DOOR HANDLE ILLUMINATION NCA WIRE OPENING ASSIST MOTOR ORG/ WIRE PNK/BLU WIRE PNK/VIO WIRE POWER CLOSING MOTOR RED WIRE RED/GRN WIRE RED/GRY WIRE RIGHT INSTRUMENT PANEL FUSE BOX (UNDER RIGHT SIDE DASH COVER) ROTARY TUMBLER SWITCH SAFETY LIMIT SWITCH W/ POWER CLOSING WHT WIRE WHT/VIO WIRE YEL WIRE ZV-MOT ZV-MOT 31 DFK

1 2 3 4 5 6 7 8 9 10 11 12 13 14 SKT (+) SIG 31 MSNT (-) BLK WIRE BLU WIRE BRN WIRE BRN/RED WIRE BRN/VIO WIRE BRN/WHT WIRE CAN B H CAN B L COMPUTER DATA LINES SYSTEM DRIVER LUMBAR SUPPORT REGULATOR CONTROL UNIT (IF EQUIPPED) FUSE 92 PANEL FUSE BOX (UNDER LEFT SIDE DASH COVER) GRN WIRE GRN/BLK WIRE GRN/BLU WIRE GRN/GRY WIRE GRN/PNK WIRE GRN/RED WIRE GRY/BLK WIRE GRY/GRN WIRE GRY/RED WIRE HOT AT ALL TIMES LEFT FRONT HEAD RESTRAINT MOTOR LEFT FRONT SEAT BACKREST ANGLE ADJUSTMENT MOTOR (IN LEFT SEAT BACK) LEFT FRONT SEAT CONTROL MODULE LEFT FRONT SEAT CUSHION FORWARD/BACK MOTOR (UNDER LEFT FRONT SEAT) LEFT FRONT SEAT CUSHION INCLINATION MOTOR (IN LEFT SEAT CUSHION) LEFT FRONT SEAT FORE/AFT ADJUSTMENT MOTOR LEFT FRONT SEAT HEIGHT ADJUSTMENT MOTOR LEFT INSTRUMENT ORG/ WIRE RED WIRE RED/BLU WIRE RED/GRY WIRE RED/VIO WIRE RED/WHT WIRE RED/YEL WIRE SEATS SYSTEM VZ (+) SIG MVZ (-) MVZ (-) MSKT (+) WHT WIRE YEL WIRE YEL/RED WIRE

1 2 3 FLAT WIRE FLAT WIRE FLAT WIRE UB 31 DATA 1 2 7 9 30 31 CAN-B L CAN-B H 1 2 CAN B L CAN B H 2 7 9 31 CAN-B L CAN-B H BLU WIRE BRN WIRE BRN/BLU WIRE BRN/GRN WIRE BRN/RED WIRE BRN/VIO WIRE COMPUTER DATA LINES SYSTEM FUSE 102 FUSE 92 PANEL FUSE BOX (UNDER LEFT SIDE DASH COVER) GRN/RED WIRE GRN/WHT WIRE HEATED SEAT SWITCH HOT AT ALL TIMES LEFT FRONT BACKREST HEATED CUSHION LEFT FRONT DOOR CONTROL MODULE (IN LEFT FRONT DOOR) LEFT FRONT SEAT BACKREST VENTILATION MOTOR GROUP (IF EQUIPPED) LEFT FRONT SEAT CONTROL MODULE LEFT FRONT SEAT CUSHION VENTILATION LEFT FRONT SEAT HEATED CUSHION LEFT FRONT SEAT OPERATION SWITCH GROUP LEFT INSTRUMENT MOTOR GROUP RED WIRE RED/BLU WIRE RED/GRN WIRE RED/VIO WIRE RIGHT FRONT BACKREST HEATED CUSHION RIGHT FRONT DOOR CONTROL MODULE (IN RIGHT FRONT DOOR) RIGHT FRONT SEAT BACKREST VENTILATION MOTOR GROUP (IF EQUIPPED) RIGHT FRONT SEAT CONTROL MODULE RIGHT FRONT SEAT CUSHION VENTILATION MOTOR GROUP RIGHT FRONT SEAT HEATED CUSHION RIGHT FRONT SEAT OPERATION SWITCH GROUP SEAT VENTILATION SWITCH YEL/RED WIRE

BATTERY SENSOR BLK WIRE BRN WIRE ESP CONTROL MODULE, REGENERATIVE BRAKING SYSTEM CONTROL UNIT HIGH VOLTAGE BATTERY, STARTER BATTERY LEFT REAR FOOTWELL RIGHT REAR FOOTWELL

1 2 3 CAN-C L CAN-C H 31 1 2 3 CAN-I L CAN-I H 31 1 2 CAN-C L CAN-C H 1 2 CAN-F L CAN-F H 1 2 CAN-H L CAN-H H 1 2 CAN-I L CAN-I H 10 20 CAN-I L CAN-I H 10 4 CAN-I L CAN-I H 11 1 CAN-F L CAN-F H 11 10 CAN-H L CAN-H H 12 11 CAN-F L CAN-F H 12 13 CAN-F L CAN-F H 19 18 CAN-H L CAN-H H 2 1 CAN-C L CAN-C H 2 3 CAN-H L CAN-H H 4 3 CA CAN-I L CAN-I H 55 42 53 40 CAN-C L CAN-C H CAN-I L CAN-I H 6 3 CAN-H L CAN-H H 9 8 CA CAN-I L CAN-I H BATTERY MANAGEMENT SYSTEM CONTROL UNIT BLU WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE CENTRAL CAN VOLTAGE DISTRIBUTOR CONNECTOR CENTRAL GATEWAY CONTROL MODULE (LEFT FRONT COMAND CONTROL UNIT DC/DC CONVERTER CONTROL MODULE (RIGHT FRONT DIRECT SELECT INTELLIGENT SERVO MODULE FOR (IF EQUIPPED) (TRANSMISSION HOUSING) DRIVETRAIN CAN VOLTAGE DISTRIBUTOR CONNECTOR DTR CONTROL UNIT (IF EQUIPPED) (UNDER PLATE IN RIGHT ELECTRIC CONTROL UNIT (VGS) ELECTRIC REFRIGERANT COMPRESSOR ENGINE COMPT) ESP CONTROL MODULE (5.5L) REGENERATIVE BRAKING HYBRID CAN VOLTAGE DISTRIBUTOR CONNECTOR (3.5L HYBRID) INSTRUMENT CLUSTER ME-SFI (ME) CONTROL UNIT (RIGHT REAR OF POWER ELECTRONICS CONTROL UNIT (RIGHT SIDE UNDERCARRIAGE) RADAR SENSOR SYSTEM CONTROL UNIT (W/ DISTANCE PLUS) SYSTEM CONTROL UNIT (3.5L HYBRID) (RIGHT FRONT ENGINE COMPT) UPPER FOOTWELL) VEHICLE DYNAMICS CAN VOLTAGE DISTRIBUTOR CONNECTOR VIO WIRE VIO/WHT WIRE WHEELHOUSE) YAW RATE, LATERAL, LONGITUDINAL ACCELERATION SENSOR YEL WIRE YEL/WHT WIRE

1 2 3 4 CAN-B L CAN-B H 31 30 1 2 4 3 CAN-B L CAN-B H 30 31 2 3 31 DFK 31 31 58 58 31 FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE BLK WIRE BLU WIRE BRN WIRE BRN/RED WIRE BRN/YEL WIRE CAN B L CAN B H COMPUTER DATA LINES SYSTEM CORNERING ILLUMINATION (IF EQUIPPED) FLAT WIRE FRONT CIGAR LIGHTER W/ ASHTRAY ILLUMINATION FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR ENGINE COMPT) GROUND DISTRIBUTION SYSTEM GRY/BLU WIRE GRY/GRN WIRE LEFT FRONT HEADLAMP UNIT LEFT REAR ASHTRAY ILLUMINATION (W/ AMBIANCE ILLUMINATION) LEFT REAR DOOR CONTROL MODULE LEFT REAR DOOR ENTRANCE, EXIT LAMP LEFT REAR DOOR INSIDE HANDLE ILLUMINATION LEFT REAR DOOR LOCK UNIT LEFT REAR DOOR TRIM STRIP ILLUMINATION LEFT REAR DOOR WARNING LAMP LEFT REAR DRIVE LOCK PAWL SWITCH LEFT REAR ROTARY TUMBLER SWITCH LEFT REAR SAFETY LIMIT SWITCH LEFT XENON HEADLAMP CONTROL MODULE NCA WIRE ORG/ WIRE REAR CIGAR LIGHTER RED WIRE RED/WHT WIRE RIGHT FRONT HEADLAMP UNIT RIGHT REAR ASHTRAY ILLUMINATION (W/ AMBIANCE ILLUMINATION) RIGHT REAR DOOR CONTROL MODULE (IN RIGHT REAR DOOR) RIGHT REAR DOOR ENTRANCE/EXIT LAMP RIGHT REAR DOOR INSIDE HANDLE ILLUMINATION RIGHT REAR DOOR LOCK UNIT RIGHT REAR DOOR TRIM STRIP ILLUMINATION RIGHT REAR DOOR WARNING LAMP RIGHT REAR DRIVE LOCK PAWL SWITCH RIGHT REAR FOOTWELL RIGHT REAR SAFETY LIMIT SWITCH RIGHT REAR ROTARY TUMBLER SWITCH RIGHT XENON HEADLAMP CONTROL MODULE SPIEGEL L SPIEGEL R STOWAGE COMPARTMENT ILLUMINATION W/ POWER CLOSING W/O AMBIANCE ILLUMINATION

2 1 MOST OUT MOST IN ACC IDLT. ACC DET. BLK WIRE BLU WIRE BRN WIRE CABEL DET COMAND CONTROL UNIT D- D+ FUSE 111 GRN WIRE GRY WIRE GRY/BRN WIRE GRY/PNK WIRE HOT AT ALL TIMES LEFT INSTRUMENT PANEL FUSE BOX (UNDER LEFT SIDE DASH COVER) MEDIA INTERFACE CONNECTOR MEDIA INTERFACE CONTROL UNIT MOST 8 7 6 5 4 3 2 1 MOST DATA BUS CIRCUIT NCA WIRE ORG/ WIRE PNK WIRE RED WIRE RED/BLU WIRE TX RX USB SHIELD USB DIGITAL GND WAKE-UP WHT WIRE WHT/GRN WIRE WHT/GRY WIRE WHT/YEL WIRE YEL WIRE YEL/BRN WIRE

BRN WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/RED WIRE BRN/YEL WIRE CAN B L CAN B H COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM CAN-B L CAN-B H DASH COVER) FUSE 102 FUSE 92 GK R GK L HOT AT ALL TIMES LEFT FRONT SEAT BELT COMFORT FEATURE SOLENOID (BASE OF LEFT "B" PILLAR) LEFT FRONT SEAT CONTROL MODULE LEFT INSTRUMENT PANEL FUSE BOX (UNDER LEFT SIDE LEFT REAR SEAT BELT COMFORT FEATURE SOLENOID NCA WIRE ORG/ WIRE REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (CENTER TRUNK) REAR SEATS CONTROL MODULE (RIGHT SIDE OF TRUNK) RED WIRE RED/WHT WIRE RIGHT FRONT SEAT BELT COMFORT SOLENOID RIGHT FRONT SEAT CONTROL MODULE RIGHT REAR FOOTWELL RIGHT REAR SEAT BELT BUCKLE/BELT COMFORT FEATURE RIGHT REAR SEAT BELT COMFORT FEATURE SOLENOID SWITCH (IN RIGHT REAR SEAT BELT BUCKLE) WHT WIRE

1 2 3 4 5 6 HS-UB 4 3 1 2 30 31 CAN-B L CAN-B H 4 5 2 3 6 FH-MOT FH-MOT HS 2 HS 1 31 BLK WIRE BLK/BLU WIRE BLK/BRN WIRE BLK/GRN WIRE BLK/VIO WIRE BLU WIRE BLU/GRN WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE BRN/RED WIRE COMPUTER DATA LINES SYSTEM FH-TIEF HF-HOCH 31 UB DATA FUSE FUSE HOLDER (RIGHT FRONT OF TRUNK) GRN WIRE GRN/BLU WIRE GRN/GRY WIRE GRY WIRE GRY/WHT WIRE HOT AT ALL TIMES HS MOTOR + MOTOR + 31 HS-UB HYDRAULIC PUMP THERMO SWITCH LEFT REAR DOOR CONTROL MODULE (IN LEFT REAR DOOR) LEFT REAR DOOR POWER WINDOW/ ROLLER BLIND SWITCH GROUP LEFT REAR HYDRAULIC WINDOW LIFTER FUSE LEFT REAR HYDRAULIC WINDOW LIFTER PRESSURE SWITCH LEFT REAR POWER WINDOW MOTOR (IN LEFT REAR DOOR) LEFT REAR POWER WINDOW SWITCH LEFT REAR POWER WINDOW, SIDE WINDOW ROLLER BLIND SWITCH LEFT REAR SIDE ROLLER BLIND MOTOR (IN LEFT REAR DOOR) LEFT REAR WINDOW CLOSED HYDRAULIC WINDOW LIFTER LIMIT SWITCH LEFT REAR WINDOW CLOSED HYDRAULIC WINDOW LIFTER REDUNDANCY LIMIT SWITCH NCA WIRE PNK WIRE PNK/GRY WIRE PNK/WHT WIRE POWER WINDOW HYDRAULIC PUMP POWER WINDOW SOLENOID VALVE 1 POWER WINDOW SOLENOID VALVE 2 REAR INDIVIDUAL POWER (NOT USED) WINDOW SWITCHES REAR SIDE ROLLER BLIND/ROOF ROLLER BLIND/REAR ROLLER BLIND REAR WINDOW ROLLER BLIND SWITCH RED WIRE RED/WHT WIRE RELAY RIGHT REAR POWER WINDOW, SIDE WINDOW ROLLER BLIND SWITCH ROOF BLIND SWITCH SPECIAL PROTECTION VEHICLE ADDITIONAL USED) VIO/GRN WIRE W/ SPECIAL PROTECTION W/ TOP PROTECTION W/O SPECIAL PROTECTION W/O TOP PROTECTION WHT WIRE

1 2 3 4 30 31 CAN-A L CAN-A H 15 16 CAN-B H CAN-B L 23 16 24 LIN BUS LIN BUS 41 54 CAN E H CAN E L 5 4 6 LIN-DATA LIN (-) LIN (+) AAC (KLA) CONTROL UNIT (CENTER DASH) BLK WIRE BLK/BLU (OR BLK/PNK) WIRE BLK/BLU WIRE BLK/BRN WIRE BLK/GRY WIRE BLK/ORG WIRE BLK/PNK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE BRN/BLK WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/PNK WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM COOLANT CIRCULATION PUMP ENGINE ENGINE CONTROLS SYSTEM FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR ENGINE COMPT) FUSE 108 FUSE 23 FUSE 5 COMPARTMENT PREFUSE BOX (RIGHT REAR ENGINE COMPT) GRN WIRE GRN/VIO WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/BLU WIRE GRY/GRN WIRE GRY/ORG WIRE HEATED WINDSHIELD CONTROL UNIT (W/ SPECIAL PROTECTION) HOT AT ALL TIMES HOT W/ ENGINE CIRCUIT 87 RELAY ENERGIZED LEFT B-PILLAR AIR DISTRIBUTION ACTUATOR MOTOR (UNDER LEFT FRONT SEAT) LEFT DUOVALVE LEFT REAR CENTER AIR OUTLET ACTUATOR MOTOR ME-SFI (ME) CONTROL UNIT (RIGHT REAR OF ENGINE COMPT) PNK WIRE PNK/GRY WIRE REAR A/C CONTROL MODULE REAR A/C ELECTRONIC BLOWER REGULATOR (IN REAR OF CENTER CONSOLE) REAR AUXILIARY HEATING SYSTEM SUPPLY UNIT REAR BLOWER MOTOR (IN REAR OF CENTER CONSOLE) REAR EVAPORATOR TEMPERATURE SENSOR (REAR OF CENTER CONSOLE) REAR REFRIGERANT SHUT-OFF VALVE (LEFT FRONT WHEELHOUSE) RED WIRE RED/BLK WIRE RED/BLU WIRE RED/GRN WIRE RED/WHT WIRE RIGHT B-PILLAR AIR DISTRIBUTION ACTUATOR MOTOR (UNDER RIGHT FRONT SEAT) RIGHT DUOVALVE RIGHT REAR AIR CONDITIONING HEATER EXCHANGER TEMPERATURE SENSOR RIGHT REAR CENTER AIR OUTLET ACTUATOR MOTOR VIO WIRE W/ REAR WINDOW DEFROSTER W/O REAR WINDOW DEFROSTER YEL WIRE YEL/BLK WIRE YEL/BLU WIRE YEL/RED WIRE