Mercedes-Benz S-class W221 facelift (2009-2013) data Wiring diagrams

AAC (KLA) CONTROL UNIT (CENTER DASH) BLK WIRE BLK/BRN WIRE BLK/YEL WIRE BLU WIRE BLU/GRN WIRE BRN WIRE BRN/BLK WIRE BRN/BLU WIRE BRN/PNK WIRE BRN/RED WIRE COMPUTER DATA LINES SYSTEM DATA FRONT CENTER AIR OUTLET POTENTIOMETER FRONT SAM CONTROL MODULE W/ FUSE/ RELAY MODULE FUSE 23 FUSE 31 FUSE 50 FUSE 54 (LEFT REAR ENGINE COMPT) GRN WIRE GRY/GRN WIRE GRY/RED WIRE GRY/VIO WIRE HOT AT ALL TIMES HOT W/ CHASSIS CIRCUIT 87 RELAY ENERGIZED HOT W/ ENGINE CIRCUIT 87 RELAY ENERGIZED LEFT SIDE AIR OUTLET POTENTIOMETER LIN BUS LIN GND LIN DATA LIN-BUS CAN-B H CAN-B L LIN-BUS LIN-BUS PNK 31 SIG WIRE PNK PNK WIRE PNK WIRE PNK/BLK WIRE PNK/BLU WIRE PNK/GRY WIRE PNK/YEL WIRE REAR CENTER AIR OUTLET POTENTIOMETER RED WIRE RED/BLK WIRE RED/GRN WIRE RED/GRY WIRE RED/WHT WIRE REFRIGERANT PRESSURE SENSOR (LEFT FRONT WHEELHOUSE) RIGHT REAR FOOTWELL RIGHT SIDE AIR OUTLET POTENTIOMETER VIO WIRE WHT/BLU WIRE YEL WIRE YEL/BLU WIRE YEL/GRN WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 MLS+ GND MLS- 1 2 3 4 5 6 LIN AIR CONDITIONING SYSTEM AIR CONDITIONING SYSTEM ANTI-LOCK BRAKES SYSTEM AIR CONDITIONING SYSTEM INSTRUMENT CLUSTER SYSTEM POWER DISTRIBUTION SYSTEM AIR CONDITIONING SYSTEM POWER DISTRIBUTION SYSTEM AIR CONDITIONING SYSTEM WIPER/WASHER SYSTEMS BLK WIRE BLK/BLU WIRE BLK/BRN WIRE BLK/GRN WIRE BLK/RED WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/GRN WIRE BLU/WHT WIRE BRN WIRE BRN/BLK WIRE BRN/BLU WIRE BRN/PNK WIRE BRN/WHT WIRE BRN/YEL WIRE CAN C L CAN C H CAN E H CAN E L CAN-B H CAN-B L COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM AIR CONDITIONING SYSTEM DATA ELECTRONIC SUSPENSION SYSTEM ENGINE COMPARTMENT PREFUSE BOX (RIGHT REAR ENGINE COMPT) ENGINE CONTROLS SYSTEM ENGINE CONTROLS SYSTEM ENGINE CONTROLS SYSTEM ENGINE CONTROLS SYSTEM REAR SAM CONTROL MODULE CIRCUIT ENGINE CONTROLS SYSTEM STARTING/CHARGING SYSTEM FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR ENGINE COMPT) FUSE 6 GRN WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/GRN WIRE GRY/YEL WIRE HOT AT ALL TIMES INTERIOR LIGHTS SYSTEM POWER DISTRIBUTION SYSTEM LEFT FRONT DOOR CONTROL MODULE (IN LEFT FRONT DOOR) LIN BUS LIN-BUS LIN-BUS CAN-B H CAN-B L MEMORY SYSTEMS MEMORY SYSTEMS ELECTRONIC POWER STEERING SYSTEM MEMORY SYSTEMS MLS+ H+ MLS- H+ PNK WIRE PNK/BLU WIRE PNK/RED WIRE POWER DISTRIBUTION SYSTEM POWER DISTRIBUTION SYSTEM POWER DISTRIBUTION SYSTEM POWER DISTRIBUTION SYSTEM REAR SAM CONTROL MODULE CIRCUIT REAR SAM CONTROL MODULE CIRCUIT ENGINE CONTROLS SYSTEM TRANSMISSIONS SYSTEM RED WIRE RED/BLK WIRE RED/BLU WIRE RED/GRN WIRE RED/GRY WIRE RED/VIO WIRE RED/WHT WIRE RED/YEL WIRE STARTING/CHARGING SYSTEM STARTING/CHARGING SYSTEM WIPER/WASHER SYSTEM TRANSMISSIONS SYSTEM VIO WIRE VIO/WHT WIRE WIPER/WASHER SYSTEM AIR CONDITIONING SYSTEM YEL WIRE YEL/GRY WIRE YEL/RED WIRE YEL/WHT WIRE

1 2 3 4 5 6 7 8 9 10 57 L 1 2 3 4 5 6 7 8 9 10 CAN-E H 1 2 3 SPIEGEL L 5 6 7 8 9 10 57 R AIR CONDITIONING SYSTEM AIR CONDITIONING SYSTEM ELECTRONIC POWER STEERING SYSTEM AUSTEMP+ BLK WIRE BLU/WHT WIRE BRN WIRE BRN/BLU WIRE BRN/GRN WIRE BRN/WHT WIRE BRN/YEL WIRE CAN E L CAN-G H CAN-G L COMPUTER DATA LINES SYSTEM CRUISE CONTROL SYSTEM DATA ENGINE COMPARTMENT PREFUSE BOX (RIGHT REAR ENGINE COMPT) ENGINE CONTROLS SYSTEM FRONT SAM CONTROL MODULE W/ FUSE, FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR ENGINE COMPT) FUSE GRN WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE GRY/BRN WIRE GRY/GRN WIRE GRY/VIO WIRE GRY/YEL WIRE HEADLIGHTS SYSTEM HEADLIGHTS SYSTEM EXTERIOR LIGHTS SYSTEM HEADLIGHTS SYSTEM HEADLIGHTS, EXTERIOR LIGHTS SYSTEMS HORNS SYSTEM HOT AT ALL TIMES INSTRUMENT CLUSTER SYSTEM INSTRUMENT CLUSTER, DEFOGGER SYSTEMS INTERIOR LIGHTS SYSTEM HEADLIGHTS SYSTEM NAVIGATION SYSTEM ORG/BLU WIRE PNK/BLU WIRE PNK/GRN WIRE PNK/RED WIRE POWER DISTRIBUTION SYSTEM RED WIRE RED/BLK WIRE RED/BLU WIRE RED/GRN WIRE RED/WHT WIRE RED/YEL WIRE RELAY MODULE (LEFT REAR ENGINE COMPT) SIG GND GND GND AUSTEMP- SIG SIG SPIEGEL R SUPPLEMENTAL RESTRAINTS SYSTEM VIO WIRE WARNING SYSTEMS WARNING, ANTI-LOCK BRAKES SYSTEMS WIPER/WASHER SYSTEM WIPER/WASHER SYSTEM ELECTRONIC SUSPENSION SYSTEM WIPER/WASHER SYSTEM INSTRUMENT CLUSTER SYSTEM WARNING SYSTEMS YEL WIRE YEL/BLU WIRE YEL/BRN WIRE YEL/GRN WIRE YEL/ORG 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

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

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