Mercedes-Benz S-class W221 facelift (2009-2013) left rear footwell Wiring diagrams

4 2 3 1 CAN-B H CAN-B L BLK WIRE BLK/WHT WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/RED WIRE BRN/WHT WIRE CAN A H CAN A L CAN B H CAN B L COMAND CONTROL UNIT COMAND DISPLAY COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM W/ MULTICONTOUR SEAT, DYNAMIC SEAT FUSE 127 GRN WIRE 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 HOT AT ALL TIMES LEFT FRONT SEAT CONTROL MODULE LEFT REAR FOOTWELL LEFT REAR FOOTWELL LAMP LUMBAR PUMP (LEFT SIDE OF TRUNK) NCA WIRE ORG/ WIRE ORG/WHT WIRE REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (CENTER TRUNK) RED WIRE RED/GRN WIRE RED/WHT WIRE RED/YEL WIRE SEATS SEATS SYSTEM SYSTEM SEATS SYSTEM VIO/GRY WIRE W/ LUMBAR SUPPORT SEAT

13 14 2 CAN-B H CAN-B L 3.BL 14 27 KZL-R KZL-L 2 11 CAN-E H CAN-E L 3 1 7 8 NSL-R BSL-R RFL-L BI-R 4 9 5 NSL-L BSL-L RFL-L 57 L 57 R BACKUP LAMPS CIRCUIT BI-L BLK WIRE BLK/GRN WIRE BLK/WHT WIRE BLU WIRE BRN WIRE BRN/GRY WIRE CENTER HIGH MOUNTED STOP LAMP COMPUTER DATA LINES SYSTEM FRONT SAM CONTROL MODULE W/ FUSE/ RELAY MODULE GRN WIRE GRN/BLU WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/GRN WIRE GRY/PNK WIRE GRY/VIO WIRE GRY/YEL WIRE HOT AT ALL TIMES ENGINE COMPARTMENT PREFUSE BOX FUSE LEFT ACTIVE CURVE ILLUMINATION POSITION SENSOR LEFT FRONT HEADLAMP UNIT LEFT LICENSE PLATE LAMP LEFT REAR FOOTWELL LEFT RIGHT FRONT FRONT SIDE SIDE MARKER MARKER LAMP LAMP LEFT TAILLAMP NCA WIRE PARKING LAMP PNK 6 WIRE REAR FOG LAMP REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (CENTER TRUNK) RED WIRE RED/GRY WIRE RIGHT ACTIVE CURVE ILLUMINATION POSITION SENSOR RIGHT FRONT HEADLAMP UNIT RIGHT LICENSE PLATE LAMP RIGHT TAILLAMP STANDING STOP, TAIL, REAR PARKING LAMP REAR SIDE MARKER LAMP BACKUP LAMP FOG LAMP STOP/ TAIL/ PARKING LAMP TURN SIGNAL LAMP TURN SIGNAL LAMP (LEFT SIDE OF ENGINE COMPT) TURN SIGNAL LAMP REAR SIDE BACKUP LAMP MARKER LAMP VIO WIRE W/ BACKUP CAMERA WHT WIRE XENON HEADLAMP CONTROL MODULE YEL 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

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

1 2 3 REAR FOG LAMP IND 31 CAN-B L CAN-B H 55 R 9 10 11 30 CAN-E H CAN-E L 31 BI-XENON LAMP W/ INTEGRAL IGNITION MODULE BRN WIRE BRN/GRY WIRE BRN/RED WIRE CAN B H CAN B L CAN-F L CAN-F H CAN-G H CAN-G L COMBINATION SWITCH HEADLAMP FLASHER/ HIGH BEAM SWITCH COMPUTER DATA LINES SYSTEM FOG LAMP INDICATOR FRONT SAM CONTROL MODULE W/ FUSE, RELAY FRONT SAM CONTROL MODULE W/ FUSE/ RELAY MODULE FUSE 49 FUSE FUSE MODULE (LEFT REAR ENGINE COMPT) GRN WIRE GRN/WHT WIRE GRY/BRN WIRE GRY/GRN WIRE GRY/ORG WIRE GRY/RED WIRE GRY/VIO WIRE GRY/YEL WIRE HEADLAMP RANGE ADJUSTMENT MOTOR HIGH BEAM INDICATOR LAMP HIGH BEAM SOLENOID HOT AT ALL TIMES HOT AT ALL TIMES ENGINE FUSE COMPARTMENT PREFUSE BOX (RIGHT REAR ENGINE COMPT) HOT W/ CIRCUIT 15 RELAY ENERGIZED INFRARED LAMP INSTRUMENT CLUSTER INSTRUMENT CLUSTER SYSTEM LEFT FRONT FOG LAMP LEFT REAR FOOTWELL LEFT TAILLAMP LOW BEAM LAMP LOW BEAM SWITCH MODULE (PART OF RIGHT HEADLAMP UNIT) NSL-L NSL-R PNK/BLU WIRE REAR FOG LAMP REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (CENTER TRUNK) RED WIRE RIGHT DAYTIME RUNNING LAMPS HEADLAMP (IF EQUIPPED) RIGHT FRONT LEFT DAYTIME FOG LAMP RUNNING LAMPS HEADLAMP (IF EQUIPPED) RIGHT TAILLAMP ROTARY LIGHT SWITCH STEERING COLUMN MODULE (TOP OF STEERING COLUMN) UPPER CONTROL PANEL CONTROL MODULE W/ NIGHT VISION ASSIST YEL WIRE YEL/BLU WIRE YEL/BRN WIRE YEL/ORG WIRE YEL/WHT WIRE

1 2 3 4 AIS SER 10 9 8 7 FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE 14 13 CAN-B L CAN-B H 31 LL HR 31 9 3 5 1 12 6 FRB-VR FRB-VL HSK-BEL 31 CAN-B H CAN-B L AMBIANCE ILLUMINATION LED 1 AMBIANCE ILLUMINATION LED 2 AMBIANCE ILLUMINATION LED 3 BLU WIRE BRN WIRE BRN/GRY WIRE BRN/RED WIRE CAN-B H CAN-B L COMPUTER DATA LINES SYSTEM DATA FLAT WIRE FOG LAMP IND LAMP GARAGE DOOR OPENER ASSEMBLY GARAGE DOOR OPENER INDICATOR LAMP GLOVE COMPARTMENT LAMP GLOVE COMPARTMENT LAMP SWITCH GRN WIRE GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/RED WIRE GRY/YEL WIRE HOT AT ALL TIMES INTERIOR FUSE PREFUSE BOX (RIGHT FRONT FOOTWELL) ILLUMINATION FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE INTERIOR REARVIEW MIRROR UNIT LAMP LEFT FRONT FOOTWELL LAMP LEFT FRONT VANITY MIRROR ILLUMINATION LEFT FRONT VANITY MIRROR ILLUMINATION SWITCH LEFT LUGGAGE COMPARTMENT LAMP LEFT READING LAMP LEFT REAR DOME LAMP LEFT REAR FOOTWELL LEFT REAR VANITY MIRROR ILLUMINATION LEFT TRUNK LID AMBIENT, WARNING LAMP LL HL NCA WIRE OVERHEAD CONTROL PANEL CONTROL MODULE (CENTER FRONT OF ROOF) RAIN/LIGHT SENSOR (FRONT CENTER OF ROOF) REAR AMBIENT LAMP REAR FOG LAMP IND REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE RED WIRE RED/GRY WIRE RIGHT AMBIENT READING LAMP LAMP RIGHT FRONT FOOTWELL LAMP RIGHT LUGGAGE COMPARTMENT LAMP RIGHT REAR VANITY MIRROR RIGHT TRUNK LID AMBIENT, WARNING LAMP ROTARY LIGHT SWITCH UPPER CONTROL PANEL CONTROL MODULE YEL WIRE YEL/BLK WIRE YEL/BRN WIRE YEL/GRN WIRE YEL/RED WIRE

1 2 3 4 5 6 7 8 9 10 11 12 FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE 1 2 3 4 5 6 7 8 ALS SER 1 2 3 4 5 CAN-B L 31 LL HR 31 DATA 30 31 AMBIENT LAMP AUTOMATIC DIMMING MIRROR BACK AUTOMATIC DIMMING INTERIOR REARVIEW MIRROR SENSOR BLU WIRE BRN WIRE BRN/RED WIRE BUTTON 1 CAN-B H 31 30 COMPUTER DATA LINES SYSTEM DOOR CONTACT ON/OFF SWITCH ELECTRIC PARKING BRAKE SWITCH EMERGENCY CALL SYSTEM CONTROL UNIT (LEFT FRONT OF TRUNK) FLAT WIRE FLAT WIRE FLAT WIRE 3 2 1 FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE FORWARD AUTOMATIC DIMMING INTERIOR REARVIEW MIRROR SENSOR FRONT DOME LAMP FRONT DOME LAMP SWITCH FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR ENGINE COMPT) FUSE 126 GARAGE DOOR OPENER GARAGE DOOR OPENER BUTTON 2 GARAGE DOOR OPENER BUTTON 3 GARAGE DOOR OPENER INDICATOR LAMP GARAGE DOOR OPENER TRANSMITTER UNIT (INSIDE REARVIEW MIRROR) GRN WIRE GRY WIRE GRY/BLU WIRE HOT AT ALL TIMES INSIDE REARVIEW MIRROR UNIT LEFT FRONT READING LAMP SWITCH LEFT READING LAMP LEFT REAR FOOTWELL LL HR MB-INFO, TELEDIAGNOSIS BUTTON GROUP NCA WIRE OVERHEAD CONTROL PANEL CONTROL MODULE (CENTER FRONT OF ROOF) REAR DOME LAMP, SWITCH REAR ROLLER SUN BLIND SWITCH REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (CENTER TRUNK) RED WIRE RED/GRY WIRE RIGHT FRONT READING LAMP SWITCH RIGHT READING LAMP ROOF SWITCH SOS PUSHBUTTON SWITCH YEL WIRE YEL/GRN WIRE YEL/PNK WIRE

BLK/GRN WIRE BLK/WHT WIRE BLK/YEL WIRE BLU/BRN WIRE BLU/YEL WIRE BRN WIRE BRN/BLU WIRE BRN/GRY WIRE BRN/RED WIRE CAN B H CAN B L CAN-E L CAN-E H (-) SH 31 31 CENTER LEFT FRONT PTS ULTRASONIC SENSOR CENTER RIGHT FRONT PTS ULTRASONIC SENSOR (REAR BUMPER) COCKPIT SWITCH GROUP COMPUTER DATA LINES SYSTEM DATA FUSE 142 MODULE W/ FUSE, RELAY MODULE (CENTER TRUNK) GRN WIRE GRN/WHT WIRE GRY/RED WIRE GRY/YEL WIRE HOT AT ALL TIMES INNER LEFT FRONT PTS ULTRASONIC SENSOR (REAR BUMPER) INNER LEFT OUTER RIGHT REAR PTS REAR PTS ULTRASONIC ULTRASONIC SENSOR SENSOR INNER RIGHT FRONT PTS ULTRASONIC SENSOR INNER RIGHT REAR PTS ULTRASONIC SENSOR LEFT REAR FOOTWELL OUTER LEFT FRONT PTS ULTRASONIC SENSOR OUTER LEFT REAR PTS ULTRASONIC SENSOR OUTER RIGHT FRONT PTS ULTRASONIC SENSOR PTS CONTROL MODULE (RIGHT SIDE TRUNK) PTS OFF SWITCH REAR PTS WARNING INDICATOR REAR SAM CONTROL RED/WHT WIRE UPPER CONTROL PANEL MODULE WHT/RED WIRE WHT/YEL WIRE YEL/RED WIRE YEL/VIO WIRE YEL/WHT WIRE

4 2 3 1 CAN-B H CAN-B L BLK WIRE BLK/WHT WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/BLK WIRE BRN/GRY WIRE BRN/RED WIRE BRN/WHT WIRE CAN A H CAN A L CAN B H CAN B L CAN-B H CAN-B L 30 31 CAN-F H CAN-F L CENTRAL GATEWAY CONTROL MODULE (LEFT FRONT UPPER FOOTWELL) COMAND CONTROL UNIT COMAND DISPLAY COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM W/ MULTICONTOUR SEAT, DYNAMIC SEAT DYNAMIC FRONT PASSENGER SEAT MASSAGE FUNCTION MAIN VALVE FRONT CENTRAL OPERATING UNIT FUSE 127 GRN WIRE GRN/BLU WIRE GRN/WHT WIRE GRY WIRE HOT AT ALL TIMES LEFT REAR FOOTWELL LUMBAR PUMP (LEFT SIDE OF TRUNK) NCA WIRE ORG/ WIRE ORG/WHT WIRE REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (CENTER TRUNK) RED WIRE RED/WHT WIRE RED/YEL WIRE RIGHT FRONT DYNAMIC SEAT CONTROL MODULE RIGHT FRONT SEAT MASSAGE FUNCTION ACTUATOR MOTOR W/ LUMBAR SUPPORT SEAT WHT WIRE YEL WIRE YEL/WHT WIRE

1 2 3 4 7 AIS SER 3 2 1 FLAT WIRE FLAT WIRE FLAT WIRE 4 3 1 31 CAN-B H CAN-B L 6 7 8 FLAT WIRE FLAT WIRE FLAT WIRE 31 DATA 30 AMBIENT LIGHT BACK FORWARD AUTOMATIC AUTOMATIC DIMMING DIMMING SENSOR SENSOR BRN WIRE BRN/RED WIRE COMPUTER DATA LINES SYSTEM FUSE 126 CONTROL MODULE W/ FUSE, RELAY MODULE (CENTER TRUNK) GARAGE DOOR OPENER PUSH BUTTON 1 GARAGE DOOR OPENER PUSH BUTTON 2 GARAGE DOOR OPENER TRANSMITTER UNIT (INSIDE REARVIEW MIRROR) GARAGE GARAGE DOOR OPENER PUSH BUTTON 3 DOOR OPENER INDICATOR LAMP GRN WIRE GRY/BLU WIRE HOT AT ALL TIMES INSIDE REARVIEW MIRROR UNIT LEFT AUTOMATIC READING DIMMING LAMP MIRROR LEFT REAR FOOTWELL OVERHEAD CONTROL PANEL CONTROL MODULE (CENTER FRONT OF ROOF) RAIN/LIGHT SENSOR (FRONT CENTER OF ROOF) REAR SAM RED WIRE RIGHT READING LAMP YEL WIRE