Mercedes-Benz C-class W203/S203/CL203 (2000-2004) blk/brn Wiring diagrams

1 2 3 31 DATA 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 CAN H CAN L 1 2 3 6 4 PRESS/TEMP PRESS/TEMP PRESS/TEMP PRESS/TEMP RESIDUAL HEAT 9 10 COMPUTER DATA LINES SYSTEM CAN L CAN H AAC PUSHBUTTON CONTROL MODULE AIR HUMIDITY SENSOR LEFT DEFROSTER VENT FLAP ACTUATOR BLK/BRN WIRE BLK/WHT WIRE BLOWER MOTOR BLU WIRE BLU/PNK WIRE BLU/RED WIRE BLU/VIO WIRE BRN WIRE BRN/BLU WIRE BRN/RED WIRE BRN/YEL WIRE CAN-L CAN-H COMPUTER DATA LINES SYSTEM COOLANT CIRCULATION PUMP (W/ RESIDUAL ENGINE HEAT UTILIZATION SYSTEM) ELECTRIC SUCTION FAN ENGINE, A/C WITH INTEGRATED CONTROL EVAP SENS FRONT PRE-FUSE BOX (RIGHT REAR OF ENGINE COMPT) FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 30 FUSE 41 FUSE 5 FUSE 51 GRN WIRE GRN/BLU WIRE GRN/YEL WIRE GRY/BLU WIRE GRY/RED WIRE GRY/VIO WIRE HEATING SYSTEMS RECIRC- ULATION UNIT FRESH AIR/RECIRC AIR FLAPS ACTUATOR HEATING SYSTEMS RECIRCULATION UNIT HOT AT ALL TIMES HOT IN RUN OR START IN-CAR TEMPERATURE SENSOR IN-CAR TEMPERATURE SENSOR FSN MOTOR INTERIOR FUSE BOX (UNDER LEFT END OF DASH) LEFT BLENDING AIR FLAP ACTUATOR RIGHT BLENDING AIR FLAP ACTUATOR LEFT FOOTWELL FLAP ACTUATOR LEFT FRESH AIR FLAP ACTUATOR RIGHT FOOTWELL FLAP ACTUATOR LEFT, RIGHT DEFROSTER FLAPS ACTUATOR FRESH AIR FLAPS ACTUATOR LEFT, RIGHT FOOTWELL FLAPS ACTUATOR ME-SFI CONTROL MODULE NCA WIRE OVERHEAD CONTROL PANEL CONTROL MODULE R BLWR SELECT SIG R BLWR SELECT RECIRC UNIT 30 COMMON REAR BLOWER ELECTRONIC SELECTOR WHEEL REAR BLOWER MOTOR REAR BLOWER MOTOR CONTROL MODULE (BELOW REAR OF CENTER CONSOLE) RECIRC UNIT R BLWR CTRL RED WIRE RED/BLU WIRE RED/GRN WIRE RED/WHT WIRE RED/YEL WIRE RIGHT DEFROSTER VENT FLAP ACTUATOR RIGHT FRESH AIR FLAP ACTUATOR W/ COMFORT AAC W/ OUTSIDE TEMPERATURE INDICATOR WHT/PNK WIRE WHT/VIO WIRE

1 2 3 4 NA KPR 1 2 5 CAN-B L CAN-B H NA 1 2 DIAG 15 HOOD 2 3 4 5 6 7 8 9 10 FROM FANFARE HORNS RELAY (DIAGRAM 1 OF 3) 2001, 2002 EARLY PROD 2002 LATE PROD ABS SYSTEM ANTI-LOCK BRAKES SYSTEM ANTI-THEFT SYSTEM ENGINE CONTROLS SYSTEM ENGINE CONTROLS SYSTEM BLK WIRE BLK/BRN WIRE BLK/GRN WIRE BLK/RED WIRE BLK/WHT WIRE BLK/YEL WIRE BLU/RED WIRE BRN WIRE BRN/RED WIRE COMPUTER DATA LINES SYSTEM COOLING FANS SYSTEM (CL) CPP BRIDGE DATA LINK CONNECTOR (UNDER LEFT SIDE OF DASH) DI CONTROL MODULE DIAG ECM DIAG ENGINE CONTROLS SYSTEM FROM FUSE 47 (DIAGRAM 1 OF 3) FROM FUSE 48 (DIAGRAM 1 OF 3) FROM FUSE 50 (DIAGRAM 1 OF 3) FROM FUSE 51 (DIAGRAM 1 OF 3) FROM FUSE 53 (DIAGRAM 1 OF 3) FROM FUSE 54 (DIAGRAM 1 OF 3) FROM FUSE 57 (DIAGRAM 1 OF 3) FRONT CIGAR LIGHTER FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 57 FUSE 59 FUSE 60 FUSE 62 FUSE 63 FUSE 64 GRN/BLK WIRE GRN/BLU WIRE GRN/RED WIRE GRY/YEL WIRE HEADLIGHTS SYSTEM HORNS SYSTEM ENGINE CONTROLS SYSTEM HOT AT ALL TIMES INSTRUMENT CLUSTER KPR MEMORY SYSTEM PNK/RED WIRE PNK/YEL WIRE REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE RED WIRE RED/BLU WIRE RED/GRN WIRE RED/YEL WIRE SOUND SYSTEMS SOUND SYSTEMS VIO/WHT WIRE YEL WIRE

1 11 1 4 CAN H CAN L 1 2 7 9 3 CAN L CAN H L FUEL (-) R FUEL 2.3L 2.6L, 3.2L 40 41 CAN L CAN H 6 7 CAN L CAN H ABS MIL AIRBAG INDICATOR, WARNING LAMP BLK/BRN WIRE BLU/BLK WIRE BRAKE FLUID INDICATOR SWITCH (IN BRAKE FLUID RESERVOIR) BRAKE FLUID, PARKING BRAKE WARNING LAMP BRK FLUID BRN WIRE BRN/BLK WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE CAN L CAN H DRVR BELT CAN-L CAN-H COMPUTER DATA LINES SYSTEM DRIVER SEAT BELT BUCKLE RESTRAINT SYSTEMS SWITCH DTR WARNING LAMP ELECTRONIC SELECTOR LEVER CONTROL MODULE (BASE OF GEAR SELECTOR LEVER) ENGINE MALFUNCTION INDICATOR LAMP ESP WARNING LAMP ETC CONTROL MODULE (UNDER RIGHT SIDE OF DASH) FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUEL LEVEL GAUGE W/ RESERVE INDICATOR FUEL PUMP ASSEMBLY FUSE 42 FUSE 50 GEAR DISPLAY (PRNDL) GRN WIRE GRN/WHT WIRE GRY/GRN WIRE HIGH BEAM INDICATOR LAMP HOT AT ALL TIMES HOT IN RUN OR START ILLUMINATION ILLUMINATION RHEOSTAT INSTRUMENT CLUSTER INTERIOR FUSE BOX (UNDER LEFT END OF DASH) LEFT FUEL LEVEL SENSOR LEFT TURN INDICATOR ME-SFI CONTROL MODULE (LEFT REAR OF ENGINE COMPT) MULTIFUNCTION DISPLAY NCA WIRE PARKING BRAKE INDICATOR SWITCH (NEAR PARK BRAKE LEVER) PRK BRK REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT SIDE OF TRUNK) RED/YEL WIRE RESTRAINT SYSTEMS CONTROL MODULE (UNDER CENTER CONSOLE, LEFT OF SHIFTER) RIGHT FUEL LEVEL SENSOR RIGHT TURN INDICATOR SEAT BELT REMINDER LAMP SOUNDER- SPEEDOMETER TACHOMETER TRIP ODOMETER RESET BUTTON WARNING BUZZER

1 2 3 4 5 6 7 8 9 10 SW GROUP SW GROUP SW GROUP SW GROUP SW GROUP 1 2 3 6 (-) H SIG 1 H SIG 2 H (-) 1 2 FH T FH H 11 12 CAN-B H CAN-B L 4 5 FH T FH H 6 5 4 1 (+) H SIG 1 H SIG 2 H (-) 6 7 5 4 CAN-B H CAN-B L 30 31 BLK WIRE BLK/BLU WIRE BLK/BRN WIRE BLK/GRN WIRE BLK/VIO WIRE BLK/WHT WIRE BLU WIRE BRN WIRE BRN/GRN WIRE BRN/RED WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM DRIVER POWER WINDOW SWITCH GROUP FH VR FUSE 21 FUSE 22 FUSE 33 GRN WIRE GRY WIRE GRY/BLU WIRE HOT AT ALL TIMES INTERIOR FUSE BOX (UNDER LEFT END OF DASH) FUSE 32 LEFT FRONT DOOR CONTROL MODULE LEFT FRONT POWER WINDOW MOTOR LEFT FRONT WINDOW RIGHT FRONT WINDOW LEFT REAR DOOR CONTROL MODULE (IF EQUIPPED) LEFT REAR POWER WINDOW MOTOR LEFT REAR POWER WINDOW SWITCH LEFT REAR WINDOW RIGHT REAR WINDOW REAR WINDOWS LOCKOUT RED WIRE RED/BLK WIRE RED/WHT WIRE RF W/L RIGHT FRONT DOOR CONTROL MODULE RIGHT FRONT POWER WINDOW MOTOR RIGHT FRONT POWER WINDOW SWITCH RIGHT REAR DOOR CONTROL MODULE (IF EQUIPPED) RIGHT REAR POWER WINDOW MOTOR RIGHT REAR POWER WINDOW SWITCH SW GROUP SW GROUP SW GROUP SW GROUP TRUNK LID RELEASE WHT WIRE YEL WIRE

1 2 3 4 5 6 7 8 9 10 11 12 CAN-B L CAN-B H FUEL LVL 1 2 CAN-B H CAN-B L 2 3 4 1 KPR 87 15 NA 4 5 CAN-B L CAN-B H ANTI-THEFT SYSTEM BLK WIRE BLK/BRN WIRE BLK/PNK WIRE BLK/RED WIRE BLK/YEL WIRE BLU/BLK WIRE BLU/RED WIRE BLU/YEL WIRE BRN WIRE BRN/BLU WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/PNK WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE CIRCUIT COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM ENGINE CONTROLS SYSTEM CRASH DEFOGGER SYSTEM DOOR LOCKS SYSTEM ENGINE CONTROLS SYSTEM ENGINE CONTROLS SYSTEM DOOR LOCKS SYSTEM DOOR LOCKS SYSTEM DOOR LOCKS SYSTEM ENGINE CONTROLS SYSTEM MEMORY SYSTEM FRONT PRE-FUSE BOX (RIGHT REAR OF ENGINE COMPT) FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUEL PUMP RELAY FUSE 10 FUSE 12 FUSE 13 FUSE 14 FUSE 16 FUSE 17 FUSE 2 FUSE 2 FUSE 1 FUSE 20 FUSE 4 FUSE 8 GRN WIRE GRN/GRY WIRE HOT AT ALL TIMES INTERIOR SOCKET KPR NA LF DOOR FUEL LVL CRASH FUEL LVL LR DOOR RF DOOR RR DOOR PASSIVE RESTRAINTS SYSTEM PASSIVE RESTRAINTS SYSTEM PNK LF COMFORT RF COMFORT WIRE PNK/RED WIRE POWER WINDOWS SYSTEM REAR DEFOGGER RELAY REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT SIDE OF TRUNK) RED WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE RELAY SEATS SYSTEM SEATS SYSTEM WIPER/ WASHER SYSTEM SIG SIG TELEPHONE WIRING VIO/BLU WIRE

15 11 26 38 CAN L CAN H BK WEAR BK WEAR 2.6L 3.2L 3 4 67 CAN L CAN H DRVR BELT BLK/BRN WIRE BRAKE FLUID INDICATOR SWITCH (IN BRAKE FLUID RESERVOIR) BRAKE FLUID, PARKING BRAKE WARNING LAMP BRK FLUID BRN WIRE BRN/BLK WIRE BRN/RED WIRE BRN/WHT WIRE CAN-L CAN-H COMPUTER DATA LINES SYSTEM ESP, BAS CONTROL MODULE (LEFT SIDE OF ENGINE COMPT) FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 42 FUSE 50 GRN WIRE GRN/RED WIRE GRN/WHT WIRE GRY/GRN WIRE HOT AT ALL TIMES HOT IN RUN OR START INSTRUMENT CLUSTER INTERIOR FUSE BOX (UNDER LEFT END OF DASH) MULTIFUNCTION DISPLAY NCA WIRE PARKING BRAKE INDICATOR SWITCH (NEAR PARK BRAKE LEVER) PRK BRK RED/YEL WIRE RESTRAINT SYSTEMS CONTROL MODULE (UNDER CENTER CONSOLE, LEFT OF SHIFTER) RIGHT FRONT BRAKE PAD CONTACT SENSOR SEAT BELT REMINDER LAMP WARNING BUZZER YEL/GRY WIRE YEL/RED WIRE

BLK WIRE BLK/BRN WIRE BLK/GRN WIRE BLK/RED WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/RED WIRE BRN WIRE BRN/BLK WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/RED WIRE BRN/VIO WIRE BRN/YEL WIRE CAN L CIRCUIT 87 RELAY (ENGINE) COMPUTER DATA LINES SYSTEM CPP FRONT PRE-FUSE BOX (RIGHT REAR OF ENGINE COMPT) FUSE 2 FUEL PUMP FUEL PUMP ASSEMBLY FUEL PUMP RELAY FUSE 4 FUSE 48 FUSE 54 FUSE 53 FUSE 53 FUSE 57 FUSE 6 GRN WIRE GRN/YEL WIRE GRY WIRE GRY/BLK WIRE GRY/BLU WIRE HOT AT ALL TIMES HOT IN RUN OR START LEFT FUEL LEVEL SENSOR RIGHT FUEL LEVEL SENSOR NCA WIRE REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT SIDE OF TRUNK) RED WIRE RED/BLU WIRE RED/GRN WIRE THROTTLE VALVE ACTUATOR (FRONT LEFT SIDE OF ENGINE) TNA VIO WIRE VIO/BLU WIRE VIO/WHT WIRE WHT WIRE YEL WIRE

AKF 30 AP MO- BLK WIRE BLK/BRN WIRE BLK/GRN WIRE BLK/RED WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/BLK WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE CKP INJ 1 INJ 4 CYLINDER IGNITION COILS ENGINE CONTROL MODULE (ME-SFI) (LEFT REAR OF ENGINE COMPT) GRN WIRE GRN/RED WIRE GRN/WHT WIRE GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/WHT WIRE MAF SENS - PRESS SIG MAF SIG MAF - CKP MR IP OIL SENS R KS - L KS SIG CLEAR PNK WIRE PNK/BLK WIRE RADIO INTERFERENCE SUPPRESSION CAPACITOR 1 (TOP OF ENGINE) RADIO INTERFERENCE SUPPRESSION CAPACITOR 2 (TOP OF ENGINE) RED WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE TO SPARK PLUGS UREF 2 VIO WIRE VIO/WHT WIRE WHT WIRE YEL WIRE YEL/GRN WIRE YEL/WHT WIRE

BLK WIRE BLK/BRN WIRE BLK/GRN WIRE BLK/RED WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/RED WIRE BRN WIRE BRN/BLK WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/RED WIRE BRN/VIO WIRE BRN/YEL WIRE CAN L CIRCUIT 87 RELAY (ENGINE) COMPUTER DATA LINES SYSTEM CPP FRONT PRE-FUSE BOX (RIGHT REAR OF ENGINE COMPT) FUSE 2 FUEL PUMP FUEL PUMP ASSEMBLY FUEL PUMP RELAY FUSE 4 FUSE 48 FUSE 54 FUSE 53 FUSE 53 FUSE 57 FUSE 6 GRN WIRE GRN/YEL WIRE GRY WIRE GRY/BLK WIRE GRY/BLU WIRE HOT AT ALL TIMES HOT IN RUN OR START LEFT FUEL LEVEL SENSOR RIGHT FUEL LEVEL SENSOR NCA WIRE REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT SIDE OF TRUNK) RED WIRE RED/BLU WIRE RED/GRN WIRE THROTTLE VALVE ACTUATOR (FRONT LEFT SIDE OF ENGINE) TNA VIO WIRE VIO/BLU WIRE VIO/WHT WIRE WHT WIRE YEL WIRE

AKF 30 AP MO- BLK WIRE BLK/BRN WIRE BLK/GRN WIRE BLK/RED WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/BLK WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE CKP INJ 1 INJ 4 CYLINDER IGNITION COILS ENGINE CONTROL MODULE (ME-SFI) (LEFT REAR OF ENGINE COMPT) GRN WIRE GRN/RED WIRE GRN/WHT WIRE GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/WHT WIRE MAF SENS - PRESS SIG MAF SIG MAF - CKP MR IP OIL SENS R KS - L KS SIG CLEAR PNK WIRE PNK/BLK WIRE RADIO INTERFERENCE SUPPRESSION CAPACITOR 1 (TOP OF ENGINE) RADIO INTERFERENCE SUPPRESSION CAPACITOR 2 (TOP OF ENGINE) RED WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE TO SPARK PLUGS UREF 2 VIO WIRE VIO/WHT WIRE WHT WIRE YEL WIRE YEL/GRN WIRE YEL/WHT WIRE