Mercedes-Benz C-class W203/S203/CL203 facelift (2004-2008) blu/blk Wiring diagrams

1 2 CAN B L CAN B H 1 2 MOST 1 2 3 4 5 6 7 8 9 10 11 12 13 IN OUT 30 WAKE UP 4 5 CAN L CAN H BLK WIRE BLU/BLK WIRE BRN WIRE BRN/GRN WIRE BRN/ORG WIRE BRN/PNK WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE COMMAND OPERATING, DISPLAY, CONTROL MODULE COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM EMERGENCY CALL SYSTEM CONTROL UNIT (W/O SOUND SYSTEM) (FRONT OF CARGO AREA) FAN MOTOR 1 WALKMAN SEPERATION POINT FAN MOTOR 2 FRONT PRE-FUSE BOX (AT RIGHT REAR OF ENGINE COMPT) FRONT SAM CONTROL UNIT, WITH FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 2 FUSE 4 GPS 1 2 3 4 5 6 7 8 GRN WIRE HOT AT ALL TIMES MUTE NCA WIRE ORG/ WIRE PNK WIRE RADIO ADDITIONAL FAN (FRONT OF CENTER CONSOLE) REAR SAM CONTROL UNIT WITH FUSE, RELAY MODULE (AT LEFT SIDE OF TRUNK) RED WIRE RED/BLU WIRE RED/GRY WIRE RED/YEL WIRE SCREEN ANTENNA AMPLIFIER MODULE 1 (WAGON) (LEFT REAR OF ROOF) SCREEN ANTENNA AMPLIFIER MODULE 2 (TOP LEFT OF TAILGATE) WAGON COUPE, SEDAN WAKE UP SIGNAL CONNECTOR WHT WIRE YEL WIRE YEL/BLK WIRE ZF 1 2 3 4 5 6 7 8 9 10 11 12

1 2 MOST 24 IN OUT 1 2 MOST IN OUT 1 MOST 16 IN 2 MOST OUT 3 1 2 MOST WAKE UP MOST IN MOST OUT BLU/BLK WIRE BRN WIRE CD CHANGER (IN GLOVE COMPT) FUSE 24 HOT AT ALL TIMES INTERIOR FUSE BOX (LEFT END OF DASH) ORG/ WIRE PNK WIRE RADIO RED WIRE RED/PNK WIRE SDAR CONTROL UNIT (AT RIGHT REAR OF TRUNK) SOUND AMPLIFIER WAKE UP SIGNAL CONNECTOR WAKE-UP

11 12 CAN-B H CAN-B L 11 15 CAN-C H CAN-C L 2 3 DOOR MOTOR DOOR MOTOR 33 34 36 37 42 43 45 46 SS RF SS RF SS LR SS LR SS RR SS RR SS LF SS LF 6 7 5 4 CAN-B H CAN-B L 30 31 8 6 7 3 2 IR REC IR REC IR REC DOOR MOTOR DOOR MOTOR BLK WIRE BLU/BLK WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/YEL WIRE BRN WIRE BRN/RED WIRE COMPUTER DATA LINES SYSTEM ESP, BAS CONTROL MODULE (AT LEFT FRONT OF ENGINE COMPT) FUSE 21 FUSE 22 FUSE 33 GRN WIRE GRN/WHT WIRE HOT AT ALL TIMES HOT AT ALL TIMES INTERIOR FUSE BOX (LEFT END OF DASH) FUSE 32 LEFT FRONT DOOR CL MOTOR (AT REAR OF DRIVER'S DOOR) LEFT FRONT DOOR CONTROL MODULE (IN DRIVER'S DOOR) LEFT FRONT IR RECEIVER UNIT (AT REAR OF LEFT FRONT DOOR) LEFT REAR DOOR CL MOTOR (AT REAR OF LEFT REAR DOOR) LEFT REAR DOOR CONTROL MODULE RED WIRE RED/BLK WIRE RED/GRN WIRE RED/GRY WIRE RED/WHT WIRE RED/YEL WIRE RIGHT FRONT DOOR CL MOTOR (AT REAR OF RIGHT FRONT DOOR) RIGHT FRONT DOOR CONTROL MODULE RIGHT FRONT IR RECEIVER UNIT (AT REAR OF RIGHT FRONT DOOR) RIGHT REAR DOOR CL MOTOR (AT REAR OF RIGHT REAR DOOR) RIGHT REAR DOOR CONTROL MODULE TO WHEEL SPEED SENSORS WHT WIRE

1 2 MOST MOST IN MOST OUT 30 WAKE UP BASS MODULE LOUDSPEAKER BLK WIRE BLU/BLK WIRE BRN WIRE BRN/GRN WIRE BRN/ORG WIRE BRN/PNK WIRE BRN/RED WIRE BRN/WHT WIRE CAN B L MUTE CAN B H 31 CD CHANGER (IN GLOVE COMPT) COMPUTER DATA LINES SYSTEM NAVIGATION SYSTEM COMPUTER DATA LINES SYSTEM COUPE EARLY FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 24 GRN WIRE HOT AT ALL TIMES INTERIOR FUSE BOX (LEFT END OF DASH) LATE LEFT FRONT DOOR MIRROR TRIANGLE SPEAKER LEFT FRONT DOOR SPEAKER LEFT REAR DOOR SPEAKER MOST BUS CIRCUIT NCA WIRE ORG/ WIRE PNK WIRE RADIO RED WIRE RED/BLU WIRE RED/PNK WIRE RIGHT FRONT DOOR MIRROR TRIANGLE SPEAKER RIGHT FRONT DOOR SPEAKER RIGHT REAR DOOR SPEAKER SEDAN, COUPE WAGON WAGON SEDAN WAKE-UP WALKMAN SEPARATION POINT WHT WIRE YEL WIRE YEL/BLK WIRE ZF 1 2 3 4 5 6 7 8 9 10 11 12

1 2 MOST MOST IN MOST OUT BLK WIRE BLU/BLK WIRE BRN WIRE FUSE 16 HOT AT ALL TIMES MOST BUS CIRCUIT NCA WIRE ORG/ WIRE REAR SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT SIDE OF TRUNK/CARGO AREA) RED WIRE RED/BLK WIRE SAT SDAR CONTROL UNIT (AT RIGHT REAR OF TRUNK) SDAR TRUNK LID ANTENNA PREINSTALLATION CONNECTOR 1 SDAR TRUNK LID ANTENNA PREINSTALLATION CONNECTOR 2 TER WAKE-UP WHT WIRE

BELT BELT TENSION SENSOR (IN LEFT FRONT FOOTWELL) BLK WIRE BLK/GRN WIRE BLK/RED WIRE BLK/VIO WIRE BLU WIRE BLU/BLK WIRE BLU/GRN WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE BRN/BLK WIRE BRN/BLU WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/PNK WIRE BRN/RED WIRE BRN/VIO WIRE BRN/WHT WIRE BRN/YEL WIRE CAN L CAN-L CAN-H COMPUTER DATA LINES SYSTEM CRASH CRASH SIG 31 31 DRIVER SEAT BELT BUCKLE RESTRAINT SYSTEMS SWITCH DRVR BELT UPFRONT R ETR LF- ETR LF+ ETR RF+ ETR RF- ETR LR- ETR LR+ ETR RR+ ETR RR- PASS BELT FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) GRN WIRE GRN/YEL WIRE GRY WIRE GRY/BLK WIRE GRY/GRN WIRE LEFT AIRBAGS SENSOR (UNDER LEFT REAR SEAT) LEFT FRONTAL ACCEL- ERATION SENSOR LEFT REAR ETR SQUIB (UNDER LEFT REAR SEAT) PASSENGER SEAT BELT BUCKLE RESTRAINT SYSTEMS SWITCH PNK WIRE PNK/BLK WIRE PRESS. PRESSURE SENSOR (UNDER RIGHT FRONT SEAT) RED WIRE RED/GRN WIRE RED/VIO WIRE RED/YEL WIRE RESTRAINT SYSTEMS CONTROL MODULE (UNDER FRONT OF CENTER CONSOLE) RIGHT AIRBAGS SENSOR (UNDER RIGHT REAR SEAT) RIGHT FRONTAL ACCEL- ERATION SENSOR RIGHT REAR ETR SQUIB (UNDER RIGHT REAR SEAT) SB LF- SB LF+ SB RF+ SB RF- SB LR- SB LR+ SB RR+ SB RR- WB L- WB L+ WB R+ WB R- SIDE L SIDE R UPFRONT L VIO WIRE VIO/BLU WIRE VIO/GRN WIRE VIO/YEL WIRE WEIGHT SENSING SYSTEM (WSS) CONTROL UNIT (UNDER RIGHT FRONT SEAT) WHT WIRE WHT/BLK WIRE WHT/BRN WIRE WHT/GRN WIRE WHT/VIO WIRE WHT/YEL WIRE YEL WIRE

BLK/VIO WIRE BLU WIRE BLU/BLK WIRE BLU/GRN WIRE BLU/RED WIRE BRN WIRE BRN/BLK WIRE BRN/GRN WIRE BRN/PNK WIRE BRN/VIO WIRE BRN/YEL WIRE CLOCKSPRING DRIVER AIRBAG SQUIB 1 (BEHIND DRIVERS AIRBAG) DRIVER AIRBAG SQUIB 2 (BEHIND DRIVERS AIRBAG) DRIVER ETR SQUIB (AT BASE OF LEFT "B" PILLAR) FRONT PASSENGER AIRBAG SQUIB 1 (BEHIND RIGHT SIDE OF DASH) FRONT PASSENGER AIRBAG SQUIB 2 (BEHIND RIGHT SIDE OF DASH) FRONT PASSENGER ETR SQUIB (AT BASE OF RIGHT "B" PILLAR) GRN WIRE GRN/YEL WIRE LEFT FRONT SIDE AIRBAG SQUIB (IN LEFT FRONT DOOR) LEFT REAR SIDE AIRBAG SQUIB (IN LEFT REAR DOOR) LEFT REAR WINDOW AIRBAG SQUIB (AT LEFT "C" PILLAR) PNK WIRE RED/BLU WIRE RED/GRN WIRE RED/VIO WIRE RIGHT FRONT SIDE AIRBAG SQUIB (IN RIGHT FRONT DOOR) RIGHT REAR SIDE AIRBAG SQUIB (IN RIGHT REAR DOOR) RIGHT REAR WINDOW AIRBAG SQUIB (AT RIGHT "C" PILLAR) STEERING COLUMN MODULE VIO WIRE VIO/BLU WIRE VIO/GRN WIRE VIO/YEL WIRE WHT WIRE WHT/BLK WIRE WHT/BRN WIRE WHT/GRN WIRE WHT/VIO WIRE YEL WIRE

1 2 MOST MOST IN MOST OUT BLU/BLK WIRE BRN WIRE EARLY PRODUCTION LATE PRODUCTION GRN WIRE GRY WIRE HANDS-FREE SYSTEM MICROPHONE GROUP MIC 2+ MIC GND NCA WIRE ORG/ WIRE PNK MIC 1 MIC 3 MIC 4 WIRE PNK WIRE REAR SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT SIDE OF TRUNK/ CARGO AREA) RED/BLK WIRE SHIELD VIO WIRE VOICE CONTROL SYSTEM CONTROL MODULE (WAGON: AT FRONT OF CARGO AREA) WAKE UP 31

1 2 CAN B L CAN B H 11 15 COMPUTER DATA LINES SYSTEM CAN-C H CAN-C L 13 12 10 11 CAN-B H CAN-B L CAN-C H CAN-C L 30 31 2 9 10 30 CAN-B L CAN-B H 3 6 5 8 7 30 CAN-C H CAN-C L CAN-B H CAN-B L 33 34 36 37 42 43 45 46 SS RF SS RF SS LR SS LR SS RR SS RR SS LF SS LF 9 8 CA BLK/BLU WIRE BLK/GRY WIRE BLU/BLK WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/YEL WIRE BRN WIRE BRN/BLU WIRE BRN/GRY WIRE BRN/RED WIRE BRN/YEL WIRE CAN B L CAN B H COLUMN) COMBINATION SWITCH COMPUTER DATA LINES SYSTEM COOLANT LEVEL INDICATOR SWITCH (RIGHT FRONT OF ENGINE COMPT) DI CONTROL MODULE ESP, BAS CONTROL MODULE (AT LEFT FRONT OF ENGINE COMPT) FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 2 FUSE 31 FUSE 4 GRN WIRE GRN/WHT WIRE HOT AT ALL TIMES HOT AT ALL TIMES FRONT PRE-FUSE BOX (AT RIGHT REAR OF ENGINE COMPT) FUSE 6 INTERIOR FUSE BOX (LEFT END OF DASH) MOTOR+ MOTOR- NCA WIRE OVERHEAD CONTROL PANEL CONTROL MODULE PNK/RED WIRE RAIN/LIGHT SENSOR (AT FRONT OF HEADLINER) REAR SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT SIDE OF TRUNK/CARGO AREA) RED WIRE RED/BLK WIRE RED/BLU WIRE RED/GRN WIRE RED/GRY WIRE RED/VIO WIRE RED/YEL WIRE RELAY RS 31 STEERING COLUMN MODULE (AT TOP OF STEERING TO WHEEL SPEED SENSORS VIO WIRE VIO/YEL WIRE WASHER NOZZLE HEATERS WASHER NOZZLE HOSE HEATER WINDSHIELD WASHER SYSTEM SWITCH WIPER MOTOR (AT LEFT REAR OF ENGINE COMPT) WIPER ON/OFF RELAY WIPER SWITCH YEL WIRE YEL/BLU WIRE

AIR INJECTION VALVE AIR PUMP BLK/BLU WIRE BLU WIRE BLU/BLK WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/PNK WIRE BRN WIRE BRN/BLU WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/ORG WIRE BRN/YEL WIRE COOLANT TEMPERATURE SENSOR (LEFT REAR OF ENGINE) CRANKSHAFT HALL SENSOR (AT LEFT REAR OF ENGINE) DOWNSTREAM TWC (KAT) GRN WIRE GRN/WHT WIRE GRY WIRE GRY/YEL WIRE LEFT INTAKE MANIFOLD TUMBLE FLAP POSITION SENSOR (LEFT REAR OF ENGINE COMPT) LEFT KNOCK SENSOR 2 (BETWEEN CYLINDER BANKS) NCA WIRE ORG/ WIRE PNK/BLK WIRE PNK/BLU WIRE PNK/GRN WIRE PNK/GRY WIRE PNK/VIO WIRE PNK/YEL WIRE PRESSURE SENSOR RED WIRE RED/BLK WIRE RED/BLU WIRE RED/GRN WIRE RED/WHT WIRE RED/YEL WIRE RIGHT KNOCK SENSOR 1 (BETWEEN CYLINDER BANKS) THROTTLE VALVE ACTUATOR UPSTREAM TWC (KAT) VIO WIRE VIO/BRN WIRE WHT WIRE