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

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

14 15 SIG GND 15 16 19 CAN B H CAN B L 23 16 26 18 SIG SIG AUSTEMP + AUSTEMP - 30 DIAG 31 LUEFTER LUEFTER CAN-F L CAN-F H 31 31 CAN B H CAN B L ABS INDICATOR LAMP AIR BAG INDICATOR, WARNING LAMP AUDIBLE TURN SIGNAL INDICATOR BLK WIRE BLK/WHT WIRE BLU WIRE BLU/BRN WIRE BLU/GRN WIRE BLU/WHT WIRE BRAKE FLUID WARNING LAMP BRN WIRE BRN/BLK WIRE BRN/BLU WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/WHT WIRE BRN/YEL WIRE CHECK ENGINE MIL INDICATOR COMPUTER DATA LINES SYSTEM COOLANT LEVEL INDICATOR SWITCH COOLANT TEMPERATURE GAUGE COOLANT TEMPERATURE WARNING LAMP DISPLAY DTR WARNING LAMP ELECTRONIC SPEEDOMETER ENGINE COMPT) ESP WARNING LAMP FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR FUEL LEVEL, RESERVE GAUGE FUEL RESERVE INDICATOR LAMP FUSE FUSE 40 GEAR INDICATOR GRN WIRE GRN/WHT WIRE GRY/BLU WIRE HIGH BEAM INDICATOR LAMP HOT AT ALL TIMES HOT W/ CIRCUIT 15 RELAY ENERGIZED INSTRUMENT CLUSTER LEFT TURN SIGNAL LAMP INDICATOR LEVEL SENSOR MULTI-FUNCTION DISPLAY NCA WIRE NIGHT VISION ASSIST CIRCUIT ORG/ WIRE ORG/WHT WIRE OUTSIDE TEMPERATURE DISPLAY TEMPERATURE SENSOR PNK/RED WIRE RED WIRE RED/BLK WIRE RED/WHT WIRE RED/YEL WIRE RELAY MODULE RIGHT TURN SIGNAL LAMP INDICATOR SEAT BELT WARNING LAMP TACHOMETER TIRE PRESSURE MONITOR WARNING LAMP TRANSMISSION MODE DISPLAY WARNING BUZZER YEL WIRE YEL/BLK WIRE YEL/GRN WIRE YEL/WHT WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 VL VR VL HR ANT ANT ANT 1 2 3 4 5 6 7 8 9 10 30 31 GND VL GND VR GND HL GND HR BLK WIRE BLU/GRN WIRE BLU/PNK WIRE BLU/RED WIRE BLU/YEL WIRE BRN WIRE BRN/BLK WIRE BRN/GRY WIRE BRN/ORG WIRE BRN/PNK WIRE BRN/RED WIRE BRN/VIO WIRE BRN/YEL WIRE CAN B H CAN-B L ANT ANT GND GND GND GND GND CAN-FH CAN-FL CENTER CONSOLE KEYLESS GO ANTENNA (UNDER CENTER CONSOLE) COMFORT SENSOR COMPUTER DATA LINES SYSTEM GND ANT GRN/BRN WIRE GRN/RED WIRE GRY WIRE GRY/BLK WIRE INSTRUMENT CLUSTER KEYLESS GO CONTROL MODULE (RIGHT REAR TRUNK) LEFT FRONT DOOR LOCK UNIT LEFT FRONT KEYLESS GO SENSOR UNIT LEFT REAR DOOR KEYLESS GO ANTENNA LEFT REAR DOOR LOCK UNIT LEFT REAR KEYLESS GO SENSOR UNIT MULTI-FUNCTION DISPLAY NCA WIRE OPENING ASSIST MOTOR ORG/ WIRE REAR WINDOW ANTENNA AMPLIFIER MODULE (REAR CENTER OF ROOF) RED WIRE RED/GRN WIRE RED/GRY WIRE RED/VIO WIRE RIGHT FRONT DOOR LOCK UNIT RIGHT FRONT KEYLESS GO SENSOR UNIT RIGHT REAR DOOR KEYLESS GO ANTENNA (IN RIGHT REAR DOORS) RIGHT REAR DOOR LOCK UNIT RIGHT REAR KEYLESS GO SENSOR UNIT TRUNK KEYLESS GO ANTENNA (CENTER FRONT OF TRUNK) WHT/BRN WIRE YEL WIRE YEL/BRN WIRE YEL/GRN WIRE YEL/WHT WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 BSL R 3 BL ANTI-THEFT SYSTEM COMPUTER DATA LINES SYSTEM ANTI-THEFT SYSTEM WARNING SYSTEMS BLK WIRE BLK/GRN WIRE BLK/PNK WIRE BLK/RED WIRE BLK/WHT WIRE BLU/BRN WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/VIO WIRE BRN WIRE BRN/BLK WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/ORG WIRE BRN/PNK WIRE BRN/VIO WIRE BRN/YEL WIRE CAN-B H CAN-B L 15 54 31 CRUISE CONTROL SYSTEM ENGINE CONTROLS SYSTEM EXTERIOR LIGHTS SYSTEM INTERIOR LIGHTS SYSTEM FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (3.5L) (LEFT REAR ENGINE COMPT) FUSE GK L GK R GRN WIRE GRN/BLU WIRE GRN/RED WIRE GRN/WHT WIRE GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/BRN WIRE GRY/GRN WIRE GRY/PNK WIRE GRY/VIO WIRE GRY/WHT WIRE HD AS HEADLIGHTS SYSTEM HOT AT ALL TIMES HOT AT ALL TIMES INTERIOR FUSE PREFUSE BOX (RIGHT FRONT FOOTWELL) HS + HS 1 HS 2 HS(+) INSTRUMENT CLUSTER SYSTEM INSTRUMENT CLUSTER, MIRRORS SYSTEMS KZL L LEFT REAR FOOTWELL MEMORY SYSTEMS NAVIGATION SYSTEM NSL R NSL L RFL L BI L RFL L BI R BSL L PASSIVE RESTRAINT SYSTEM PNK/RED WIRE POWER DISTRIBUTION SYSTEM POWER DISTRIBUTION SYSTEM NAVIGATION, SOUND SYSTEMS POWER TOPS SYSTEM POWER WINDOWS SYSTEM REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (CENTER TRUNK) RED WIRE RED/BLK WIRE RED/BLU WIRE RED/GRY WIRE RED/VIO WIRE RED/WHT WIRE RED/YEL WIRE SEATS, MEMORY SYSTEMS SHIFT INTERLOCK SYSTEM ENGINE CONTROLS SYSTEM SIG SOUND SYSTEMS SOUND SYSTEMS EXTERIOR LIGHTS SYSTEM SUPPLEMENTAL RESTRAINTS SYSTEM SUPPLEMENTAL RESTRAINTS SYSTEM DEFOGGER SYSTEM SUPPLEMENTAL RESTRAINTS SYSTEM TRUNK, TAILGATE, FUEL DOORS SYSTEM TRUNK, TAILGATE, FUEL DOORS SYSTEM INTERIOR LIGHTS SYSTEM EXTERIOR LIGHTS SYSTEM TRUNK, TAILGATE, FUEL DOORS SYSTEM TRUNK, TAILGATE, FUEL DOORS SYSTEM VOLUME CONTROL INTERMEDIATE CONNECTOR (W/ DVD) WHT 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

30 31 CAN E H CAN E L BRN WIRE CAN-F L CAN-F H COMPUTER DATA LINES SYSTEM FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR ENGINE COMPT) GRN WIRE GRN/WHT WIRE HOT W/ CIRCUIT 15 RELAY/ SPARE RELAY 1 (CHANGE OVER CONTACT) ENERGIZED FUSE 25 INSTRUMENT CLUSTER LEFT FRONT TPM (RDK) WHEEL SENSOR (IN LEFT FRONT WHEEL ASSEMBLIES) LEFT REAR TPM (RDK) WHEEL SENSOR (IN LEFT REAR WHEEL ASSEMBLIES) PNK WIRE PNK/RED WIRE RED WIRE RED/WHT WIRE RIGHT FRONT TPM (RDK) WHEEL SENSOR (IN RIGHT FRONT WHEEL ASSEMBLIES) RIGHT REAR TPM (RDK) WHEEL SENSOR (IN RIGHT REAR WHEEL ASSEMBLIES) TIRE PRESSURE MONITOR WARNING LAMP TPM CONTROL MODULE (RIGHT FRONT FOOTWELL) WHT WIRE YEL WIRE YEL/WHT WIRE