Mercedes-Benz S-class W221 facelift (2009-2013) front sam control module w/ fuse, relay module (left rear engine compt) Wiring diagrams

12 13 CAN-F L CAN-F H 41 54 CAN E H CAN E L BATTERY SENSOR (RIGHT FRONT OF TRUNK) BD LIN BLK WIRE BLU/WHT WIRE CAN-G H CAN-G L COMPUTER DATA LINES SYSTEM ENGINE COMPARTMENT PREFUSE BOX FUSE 2 (RIGHT REAR ENGINE COMPT) FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR ENGINE COMPT) GENERATOR GRN WIRE GRN/WHT WIRE INSTRUMENT CLUSTER INTERIOR PREFUSE BOX (RIGHT FRONT FOOTWELL) LIN ME-SFI (ME) CONTROL UNIT (RIGHT REAR OF ENGINE COMPT) MULTI-FUNCTION DISPLAY ON-BOARD ELECTRICAL SYSTEM BATTERY RED WIRE STARTING CIRCUIT YEL WIRE YEL/WHT WIRE

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 12 6 2 8 7 31 CAN-B H CAN-B L 31 12 13 CAN-F L CAN-F H 15 16 CAN-B H CAN-B L BRN WIRE BRN/GRY WIRE BRN/RED WIRE BRN/YEL WIRE COCKPIT SWITCH GROUP COMPUTER DATA LINES SYSTEM EXTERIOR LAMP SWITCH FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR ENGINE COMPT) FUSE 6 PREFUSE BOX (RIGHT REAR ENGINE COMPT) GRY/RED WIRE GRY/YEL WIRE HCS (SRA) SWITCH HCS PUMP (LEFT FRONT WHEELWELL) HOT AT ALL TIMES INSTRUMENT CLUSTER LIN BUS RED WIRE RED/GRY WIRE UPPER CONTROL PANEL CONTROL UNIT 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

ADJUSTMENT SWITCH BACKREST SWITCH BRN WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE CAN B H CAN B L COMPUTER DATA LINES SYSTEM DATA FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE FORE/AFT, HEIGHT, INCLINATION FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR ENGINE COMPT) 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 HEAD RESTRAINT ADJUSTMENT 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 SEAT CUHION FORE/AFT SWITCH SEATS SYSTEM SWITCH VIO/GRY WIRE

1 2 CAN B L CAN B H 15 1 17 18 25 31 30 CAN-E L CAN-E H GSS FA 15 14 GND SIG 15 16 CAN-B H CAN-B L 4 8 3 31 31 DFK AUDIBLE TURN SIGNAL IND BLU WIRE BRAKE FLUID INDICATOR SWITCH (LEFT REAR OF ENGINE COMPT) BRAKE FLUID WARNING LAMP BRN WIRE BRN/BLK WIRE BRN/BLU WIRE BRN/GRN WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE CAN-F L CAN-F H COMPUTER DATA LINES SYSTEM DOOR LOCKS SYSTEM DRIVER SEAT BELT BUCKLE, SEAT BELT WARNING SWITCH FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR ENGINE COMPT) GRN WIRE GRN/WHT WIRE HOT AT ALL TIMES ENGINE COMPARTMENT PREFUSE BOX (RIGHT REAR ENGINE COMPT) FUSE 6 INSTRUMENT CLUSTER LEFT FRONT DOOR CONTROL MODULE (IN LEFT FRONT DOOR) LIN BUS NCA WIRE PNK WIRE PNK/RED WIRE POWER DISTRIBUTION SYSTEM RED WIRE RED/WHT WIRE RESTRAINT SYSTEMS CONTROL MODULE (FRONT OF CENTER CONSOLE) RIGHT FRONT BRAKE PAD WEAR SENSOR (BEHIND RIGHT FRONT WHEEL) ROTARY TUMBLER SWITCH LEFT FRONT DOOR LOCK UNIT SEAT BELT WARNING LAMP WARNING BUZZER WHT WIRE YEL WIRE YEL/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

1 2 3 FLAT WIRE FLAT WIRE FLAT WIRE 1 2 CAN B L CAN B H 10 11 CAN-E H CAN-E L 14 5 13 11 12 9 3 1 7 H+ GND MLS- MLS+ H+ GND MLS- MLS+ 31 16 15 CAN-B L CAN-B H 3 2 1 DATA 31 UB BLK/WHT WIRE BLK/YEL WIRE BRN WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM ENGINE COMPARTMENT PREFUSE BOX FLAT WIRE FLAT WIRE FLAT WIRE FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR ENGINE COMPT) FUSE (RIGHT REAR ENGINE COMPT) GRN WIRE GRN/WHT WIRE GRN/YEL WIRE HOT AT ALL TIMES LEFT FRONT DOOR CONTROL MODULE (IN LEFT FRONT DOOR) LEFT FRONT SEAT OPERATION SWITCH GROUP MEMORY 1, 2, 3 SWITCH MEMORY SWITCH RAISE/LOWER, FORWARD/ BACKWARD SWITCH RED WIRE RED/WHT WIRE RED/YEL WIRE STEERING COLUMN IN/OUT MOTOR STEERING COLUMN MODULE (TOP OF STEERING COLUMN) STEERING COLUMN UP/DOWN MOTOR

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

10 11 8 CAN-E H CAN-E L 31 12 13 CAN-F L CAN-F H 5 4 1 3 30 31 CAN-B L CAN-B H 6 7 8 FLAT WIRE FLAT WIRE FLAT WIRE 31 DATA 30 BLK/BLU WIRE BLU/WHT WIRE BRN WIRE BRN/RED WIRE BRN/YEL WIRE CAN B H CAN B L CAN C H CAN C L CIRCUIT COMBINATION SWITCH COMPT) COMPUTER DATA LINES SYSTEM ENGINE COMPARTMENT PREFUSE BOX (RIGHT REAR ENGINE COMPT) FLAT WIRE FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR ENGINE COMPT) FUSE 126 FUSE 41 FUSE 42 FUSE 49 FUSE 57 FUSE 6 GRN WIRE GRN/WHT WIRE HOT AT ALL TIMES INSTRUMENT CLUSTER MASTER WIPER MOTOR MULTIFUNCTION DISPLAY OVERHEAD CONTROL PANEL CONTROL MODULE (CENTER FRONT OF ROOF) RAIN/LIGHT SENSOR (FRONT CENTER OF ROOF) REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (CENTER RED WIRE RED/BLK WIRE RED/BLU WIRE RED/GRN WIRE SIG SLAVE WIPER MOTOR STEERING COLUMN MODULE (TOP OF STEERING COLUMN) TRUNK WASHER NOZZLE HOSE HEATER WINDSHIELD WASHER FLUID LEVEL INDICATOR SWITCH (LEFT FRONT WHEELWELL) WINDSHIELD WASHER FLUID PUMP (RIGHT FRONT OF ENGINE COMPT) WINDSHIELD WASHER SYSTEM SWITCH WIPER PARK HEATER WIPER PARK POSITION HEATER RELAY WIPER SWITCH YEL WIRE YEL/VIO WIRE YEL/WHT WIRE