Mercedes-Benz S-class W221 (2005-2009) (under left rear seat) Wiring diagrams

1 2 3 4 CAN-B L CAN-B H 31 30 12 13 CAN-F L CAN-F H 15 14 13 12 15 CAN-B L CAN-B H 6 12 CAN-B L CAN-B H 6 5 4 DATA 9 22 25 21 HD-AS ALARM SIREN W/ AUXILIARY BATTERY (AT LEFT FRONT WHEELHOUSE) ATA (EDW) FUNCTION INDICATOR BLK WIRE BRN WIRE BRN/GRY WIRE BRN/ORG WIRE BRN/PNK WIRE BRN/RED WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM DRIVER DOOR INFRARED SENSOR ENGINE HOOD OPEN/ CLOSED SWITCH (ATA) (CENTER FRONT OF ENGINE COMPT) FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE FAN RELAY MODULE FUEL FILLER FLAP CL MOTOR FUSE 29 FUSE 80 GRN WIRE GRY WIRE GRY/BLU WIRE HEADLIGHTS SYSTEM HORNS SYSTEM HOT AT ALL TIMES HOT AT ALL TIMES RIGHT INSTRUMENT PANEL FUSE 79 FUSE BOX INSTRUMENT CLUSTER LEFT FRONT DOOR CONTROL MODULE (IN LEFT FRONT DOOR) NCA WIRE PNK WIRE PNK/RED WIRE REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE RED WIRE RED/BLK WIRE RED/BLU WIRE SPIEGEL TRUNK LID CONTACT SWITCH TRUNK LID EMERGENCY RELEASE SWITCH TRUNK LID EXTERNAL OPERATION SWITCH UPPER CONTROL PANEL CONTROL MODULE WHT WIRE YEL WIRE YEL/WHT WIRE

10 11 9 8 CAN-E H CAN-E L 30 31 41 54 10 37 50 11 23 CAN-E H CAN-E L ACCEL SET/ ACCELERATOR PEDAL SENSOR (TOP OF ACCELERATOR PEDAL ASSEMBLY) BLK WIRE BLK/GRN WIRE BLU WIRE BLU/BRN WIRE BLU/GRY WIRE BRN WIRE BRN/WHT WIRE BRN/YEL WIRE CAN E H CAN E L CAN H H CAN H L COMPUTER DATA LINES SYSTEM CONTROL CONTACT CRUISE CONTROL SWITCH DECEL/ SET DTR DISTANCE POTENTIOMETER FRONT BUMPER LEFT INNER RADAR SENSOR FRONT BUMPER LEFT OUTER RADAR SENSOR FRONT BUMPER RIGHT INNER RADAR SENSOR FRONT BUMPER RIGHT OUTER RADAR SENSOR FUSE GRN WIRE GRN/WHT WIRE GRY WIRE HOT AT ALL TIMES HOT AT ALL TIMES FRONT SAM CONTROL MODULE WITH FUSE, RELAY MODULE FUSE 49 HOT IN ON OR START REAR SAM FUSE CONTROL MODULE WITH FUSE, RELAY MODULE ME-SFI CONTROL MODULE (RIGHT REAR OF ENGINE COMPT) OFF PNK PNK PNK WIRE PNK PNK WIRE PNK/BLU WIRE PNK/BRN WIRE PNK/GRN WIRE PNK/GRY WIRE PNK/YEL WIRE PWG+ (-) RADAR SENSORS CONTROL UNIT (SGR) REAR BUMPER LEFT INNER RADAR SENSOR REAR BUMPER LEFT OUTER RADAR SENSOR REAR BUMPER RIGHT INNER RADAR SENSOR REAR BUMPER RIGHT OUTER RADAR SENSOR REAR PTS WARNING DISPLAY RED WIRE RED/BLK WIRE RED/WHT WIRE RESUME FROM MEMORY THROTTLE VALVE ACTUATOR (CENTER REAR OF ENGINE) VIO WIRE VIO/GRN WIRE VIO/WHT WIRE VIO/YEL WIRE WHT WIRE YEL WIRE

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 EARLY PRODUCTION 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 LATE PRODUCTION LEFT FRONT SEAT CONTROL MODULE LEFT REAR FOOTWELL LAMP LUMBAR PUMP (W/ LUMBAR SUPPORT) NCA WIRE ORG/ WIRE ORG/WHT WIRE REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE RED WIRE RED/GRN WIRE RED/WHT WIRE RED/YEL WIRE SEATS SEATS SYSTEM SYSTEM SEATS SYSTEM W/ LUMBAR SUPPORT

1 2 CAN-E H CAN-E L 13 14 2 CAN-B H CAN-B L 3.BL 14 27 KZL-R KZL-L 3 1 7 8 NSL-R BSL-R RFL-L BI-R 4 9 5 6 NSL-L BSL-L RFL-L 57 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 PREFUSE FRONT SAM CONTROL MODULE W/ FUSE/ RELAY MODULE FUSE 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 LEFT FRONT HEADLAMP UNIT LEFT FRONT SIDE LEFT LICENSE PLATE LAMP LEFT TAILLAMP MARKER LAMP NCA WIRE PNK 6 WIRE REAR REAR SIDE MARKER LAMP FOG LAMP REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE REAR TURN SIGNAL LAMP SIDE BACKUP LAMP MARKER LAMP RED WIRE RED/GRY WIRE RIGHT FRONT RIGHT FRONT HEADLAMP UNIT RIGHT LICENSE PLATE LAMP RIGHT TAILLAMP SIDE MARKER LAMP STANDING/ PARKING LAMP STOP, TAIL, PARKING LAMP BACKUP LAMP STOP, TAIL, PARKING LAMP REAR FOG LAMP TURN SIGNAL LAMP TURN SIGNAL LAMP STANDING, PARKING LAMP VEHICLE POWER SUPPLY CONTROL UNIT VIO WIRE W/ BACKUP CAMERA WHT WIRE YEL WIRE YEL/GRN WIRE

AC RECIRCULATION UNIT AIR PUMP BLK WIRE BRN WIRE EARLY PRODUCTION HEATED REAR WINDOW LATE PRODUCTION POWER SUPPLY SWITCH FOR HYDRAULIC WINDOW LIFTER LIMIT SWITCH RIGHT FRONT SEAT CONTROL MODULE

1 2 (W/ FRONT ROLLER SUN BLIND) (W/ FRONT ROLLER SUN BLIND) 31 30 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 6 7 8 MOTOR + MOTOR - HS 1 HS 2 HS UB 31 1 2 3 4 5 6 7 8 MOTOR + MOTOR - HS 2 HS UB HS 1 31 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 BLK WIRE BLU WIRE BRN WIRE BRN/RED WIRE CAN-B H 31 30 COMPUTER DATA LINES SYSTEM DOOR CONTACT ON/OFF SWITCH ELECTRIC PARKING BRAKE SWITCH EMERGENCY CALL SYSTEM CONTROL UNIT 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 FUSE 126 FUSE 129 W/ FUSE, RELAY MODULE GARAGE DOOR OPENER INDICATOR LAMP GARAGE DOOR OPENER PUSHBUTTON 1 GARAGE DOOR OPENER PUSHBUTTON 2 GARAGE DOOR OPENER PUSHBUTTON 3 GARAGE DOOR OPENER TRANSMITTER UNIT GRN WIRE GRY/BLU WIRE HOT AT ALL TIMES INTERIOR REARVIEW MIRROR UNIT LEFT FRONT READING LAMP SWITCH LEFT READING LAMP LL HR MB-INFO, TELEDIAGNOSIS BUTTON GROUP NCA WIRE OVERHEAD CONTROL PANEL CONTROL MODULE (CENTER FRONT OF ROOF) POWER TOPS SYSTEM RAIN/LIGHT SENSOR REAR DOME LAMP, SWITCH REAR ROLLER SUN BLIND SWITCH REAR SAM CONTROL MODULE RED WIRE RIGHT FRONT READING LAMP SWITCH RIGHT READING LAMP ROOF SWITCH SOS PUSHBUTTON SWITCH VIO WIRE 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/RED WIRE CAN-B H CAN-B L CENTER LEFT FRONT PTS ULTRASONIC SENSOR CENTER RIGHT FRONT PTS ULTRASONIC SENSOR COCKPIT SWITCH GROUP COMPUTER DATA LINES SYSTEM DATA FRONT BUMPER LEFT INNER RADAR SENSOR FRONT BUMPER RIGHT INNER RADAR SENSOR FRONT BUMPER RIGHT OUTER RADAR SENSOR FRONT OUTER OUTER LEFT FRONT LEFT OUTER PTS ULTRASONIC RADAR SENSOR SENSOR FUSE 142 MODULE W/ FUSE, RELAY MODULE HOT AT ALL TIMES INNER LEFT FRONT PTS ULTRASONIC SENSOR INNER RIGHT FRONT PTS ULTRASONIC SENSOR OUTER RIGHT FRONT PTS ULTRASONIC SENSOR PTS CONTROL MODULE PTS OFF SWITCH REAR SAM CONTROL RED/BLK WIRE RED/WHT WIRE VIO WIRE VIO/WHT WIRE W/ DISTRONIC PLUS W/ PARKTRONIC SYSTEM WHT/RED WIRE WHT/YEL WIRE YEL/RED WIRE YEL/VIO WIRE YEL/WHT WIRE

BLK/GRN WIRE BLK/YEL WIRE BLU/BRN WIRE BLU/YEL WIRE BRN WIRE BRN/BLU WIRE CAN E H CAN E L CAN H H CAN H L COMPUTER DATA LINES SYSTEM FUSE 135 MODULE W/ FUSE, RELAY MODULE GRN WIRE GRN/WHT WIRE INNER LEFT REAR PTS ULTRASONIC SENSOR INNER RIGHT REAR PTS ULTRASONIC SENSOR OUTER LEFT REAR PTS ULTRASONIC SENSOR OUTER RIGHT REAR PTS ULTRASONIC SENSOR RADAR SENSORS CONTROL UNIT REAR BUMPER LEFT INNER RADAR SENSOR REAR BUMPER LEFT OUTER RADAR SENSOR (W/ BLIND SPOT ASSIST) REAR BUMPER RIGHT INNER RADAR SENSOR REAR BUMPER RIGHT OUTER RADAR SENSOR (W/ BLIND SPOT ASSIST) REAR PTS WARNING DISPLAY REAR SAM CONTROL RED/BLK WIRE RED/WHT WIRE RELAY ENERGIZED VIO WIRE VIO/WHT WIRE W/ DISTRONIC SYSTEM W/ PARKTRONIC SYSTEM YEL/RED WIRE YEL/VIO WIRE YEL/WHT WIRE

4 2 3 1 CAN-B H CAN-B L BLK WIRE BLK/GRN WIRE BLU WIRE BRN WIRE BRN/GRY WIRE BRN/RED WIRE BRN/WHT WIRE CAN B H CAN B L CENTRAL LUMBAR CUSHION PIEZO VALVE CENTRAL LUMBAR CUSHION PRESSURE SENSOR COMPUTER DATA LINES SYSTEM GRN/BLU WIRE LEFT BACKREST LATERAL SUPPORT CUSHION PIEZO VALVE LEFT BACKREST LATERAL SUPPORT CUSHION PRESSURE SENSOR LOWER LUMBAR CUSHION PRESSURE SENSOR LOWER SHOULDER LUMBAR CUSHION CUSHION PRESSURE PIEZO SENSOR VALVE LUMBAR PUMP (W/ LUMBAR SUPPORT) NCA WIRE ORG/GRN WIRE ORG/WHT WIRE REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE RED WIRE RED/WHT WIRE RED/YEL WIRE RIGHT BACKREST LATERAL SUPPORT CUSHION PIEZO VALVE (W/ DYNAMIC SEAT) RIGHT BACKREST LATERAL SUPPORT CUSHION PRESSURE SENSOR (W/ DYNAMIC SEAT) RIGHT FRONT SEAT BACKREST CUSHION VALVE GROUP SHOULDER CUSHION PIEZO VALVE UPPER LUMBAR CUSHION PIEZO VALVE UPPER LUMBAR CUSHION PRESSURE SENSOR W/ LUMBAR SUPPORT W/ MULTICONTOUR SEAT, DYNAMIC SEAT WHT WIRE WHT/GRN WIRE YEL WIRE

AAV ACTIVATED CHARCOAL FILTER SHUTOFF VALVE AIR AIR PUMP BLK/GRN WIRE BLU WIRE BLU/GRY WIRE BLU/WHT WIRE BRN WIRE BRN/GRN WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE CAN E L CAN C L CAN-E H CAN-C H EGS COMPUTER DATA LINES SYSTEM CRASH EKP ELECTRIC SUCTION FAN ENGINE, A/C W/ INTEGRATED CONTROL FRONT SAM CONTROL MODULE W/ FUSE/ RELAY MODULE FUEL PUMP (UNDER LEFT REAR OF VEHICLE) FUEL PUMP RELAY MODULE FUSE 118 GRN WIRE GRN/BLK WIRE GRN/WHT WIRE GRY/PNK WIRE GRY/YEL WIRE HOT AT ALL TIMES ME-SFI (ME) CONTROL UNIT (RIGHT REAR OF ENGINE COMPT) NCA WIRE PURGE CONTROL VALVE (LEFT REAR OF ENGINE COMPT) PWG+ (-) REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE RED WIRE RED/BLK WIRE RED/GRN WIRE RED/GRY WIRE RED/WHT WIRE RED/YEL WIRE SIG SUPPLEMENTAL RESTRAINTS SYSTEM VIO/GRN WIRE VIO/YEL WIRE YEL/RED WIRE