Mercedes-Benz C-class W203/S203/CL203 (2000-2004) gry/grn Wiring diagrams

1 2 3 4 5 6 BR RELEASE BR RELEASE 1 2 3 4 5 6 HH (-) HH (+) 1 2 3 4 5 6 HV (-) HV (+) 1 2 3 4 5 6 LH (-) LH (+) 1 2 3 6 7 8 ESA SW ESA SW ESA SW ESA SW ESA SW ESA SW 1 2 H RELEASE H RELEASE 2 1 CAN-B H CAN-B L 2 3 4 LK (+) HEAD (+) (+) 2 MEMORY LOCATION 5 6 MHEAD (-) MLK (-) 6 7 5 CAN-B H CAN-B L 30 BACKREST BLK WIRE BLK/YEL WIRE BLU WIRE BRN WIRE BRN/GRY WIRE BRN/RED WIRE CAN B L CAN B H CL MODELS COMPUTER DATA LINES SYSTEM DRIVER FRONT SEAT ADJUSTMENT CONTROL MODULE (UNDER SEAT) DRIVER SEAT BACKREST ADJUSTMENT MOTOR DRIVER SEAT BACKREST RELEASE MICROSWITCH (CL MODELS) DRIVER SEAT FORWARD/BACK ADJUSTMENT MOTOR DRIVER SEAT FRONT UP/DOWN ADJUSTMENT MOTOR DRIVER SEAT HEAD RESTRAINT RAISE/LOWER ADJUSTMENT MOTOR DRIVER SEAT HEIGHT RELEASE MICROSWITCH (CL MODELS) DRIVER SEAT REAR UP/DOWN ADJUSTMENT MOTOR EXCEPT CL MODELS FRONT (RAISE/ LOWER) FRONT PRE-FUSE BOX (RIGHT REAR OF ENGINE COMPT) FUSE 2 FUSE 21 FUSE 29 FUSE 31 GRY/BLK WIRE GRY/GRN WIRE GRY/YEL WIRE HEAD RESTRAINT (RAISE/ LOWER) HOT AT ALL TIMES INTERIOR FUSE BOX (UNDER LEFT END OF DASH) FUSE 27 LEFT FRONT DOOR CONTROL MODULE LEFT FRONT DOOR ESA SWITCH GROUP MEMORY STORE MEMORY SYSTEMS (STEERING COLUMN CIRCUIT) MHH (+) MHH (-) MHV (+) MHV (-) MLH (+) MLH (-) NCA WIRE REAR (RAISE/ LOWER) REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT SIDE OF TRUNK) RED WIRE RED/VIO WIRE RED/WHT WIRE RED/YEL WIRE SEAT (FORWARD/ BACK) STEERING COLUMN LOCATION (RAISE/LOWER) (FORWARD/BACK) VIO WIRE WHT WIRE YEL WIRE YEL/BLK WIRE YEL/BLU 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 6 7 8 ESA SW ESA SW ESA SW ESA SW ESA SW ESA SW 2 1 CAN-B H CAN-B L 2 MEMORY LOCATION 5 6 7 30 CAN-B H CAN-B L 6 5 8 7 2 CAN-C H CAN-C L CAN-B H CAN-B L 31 BLK WIRE BLK/YEL WIRE BLU WIRE BRN WIRE BRN/GRY WIRE BRN/RED WIRE CAN B L CAN B H CL MODELS COMPUTER DATA LINES SYSTEM DI CONTROL MODULE DRIVER FRONT SEAT ADJUSTMENT CONTROL MODULE (UNDER SEAT) EXCEPT CL MODELS FRONT PRE-FUSE BOX (RIGHT REAR OF ENGINE COMPT) FUSE 2 FUSE 21 FUSE 27 FUSE 29 FUSE 31 GRN WIRE GRN/WHT WIRE GRY/BLK WIRE GRY/GRN WIRE GRY/YEL WIRE HOT AT ALL TIMES INTERIOR FUSE BOX (UNDER LEFT END OF DASH) LEFT FRONT DOOR CONTROL MODULE LEFT FRONT DOOR ESA SWITCH GROUP MEMORY STORE NCA WIRE REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT SIDE OF TRUNK) RED WIRE RED/VIO WIRE RED/WHT WIRE RED/YEL WIRE SCL STEERING COLUMN ADJUSTMENT LOCK INDICATOR SWITCH STEERING COLUMN HEIGHT ADJUSTMENT MOTOR (UP/DOWN) STEERING COLUMN LOCATION (RAISE/LOWER) (FORWARD/BACK) STEERING COLUMN LONGITUDINAL ADJUSTMENT MOTOR (FWD/BACK) VCS SWITCH VIO WIRE WHT WIRE YEL WIRE YEL/BLK WIRE YEL/BLU WIRE

1 2 3 6 7 8 ESA SW ESA SW ESA SW ESA SW ESA SW ESA SW 13 12 10 11 CAN-B H CAN-B L CAN-C H CAN-C L 30 31 2 1 CAN-B H CAN-B L 2 MEMORY LOCATION 4 5 CAN-B L CAN-B H 5 6 7 30 CAN-B H CAN-B L BLK WIRE BLK/YEL WIRE BLU WIRE BRN WIRE BRN/GRY WIRE BRN/RED WIRE CAN B L CAN B H CL MODELS COMPUTER DATA LINES SYSTEM DRIVER FRONT SEAT ADJUSTMENT CONTROL MODULE (UNDER SEAT) EXCEPT CL MODELS FRONT PRE-FUSE BOX (RIGHT REAR OF ENGINE COMPT) FUSE 6 FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 2 FUSE 21 FUSE 27 FUSE 29 FUSE 31 FUSE 4 GRN WIRE GRN/WHT WIRE GRY/BLK WIRE GRY/GRN WIRE GRY/YEL WIRE HOT AT ALL TIMES INTERIOR FUSE BOX (UNDER LEFT END OF DASH) LEFT FRONT DOOR CONTROL MODULE LEFT FRONT DOOR ESA SWITCH GROUP MEMORY STORE NCA WIRE PNK/RED WIRE REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT SIDE OF TRUNK) RED WIRE RED/BLU WIRE RED/VIO WIRE RED/WHT WIRE RED/YEL WIRE SCL STEERING COLUMN ADJUSTMENT LOCK INDICATOR SWITCH STEERING COLUMN ADJUSTMENT SWITCH STEERING COLUMN HEIGHT ADJUSTMENT MOTOR (UP/DOWN) STEERING COLUMN LOCATION (RAISE/LOWER) (FORWARD/BACK) STEERING COLUMN LONGITUDINAL ADJUSTMENT MOTOR (FWD/BACK) STEERING COLUMN MODULE VIO WIRE WHT WIRE YEL WIRE YEL/BLK WIRE YEL/BLU WIRE

31 GS F- GS F+ GS BF+ GS BF- GS HR- GS HR+ 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/PNK WIRE BRN/RED WIRE BRN/VIO WIRE BRN/WHT WIRE BRN/YEL WIRE CAN-L CAN-H COMPUTER DATA LINES SYSTEM CRASH SIG 31 DRIVER SEAT BELT BUCKLE RESTRAINT SYSTEMS SWITCH FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) GRN WIRE GRN/YEL WIRE GRY WIRE GRY/GRN WIRE GS HL- GS HL+ DRVR BELT LEFT AIRBAGS SENSOR (UNDER LEFT REAR SEAT) LEFT REAR ETR SQUIB (UNDER LEFT REAR SEAT) PASS BELT SEAT OCC PASSENGER SEAT BELT BUCKLE RESTRAINT SYSTEMS SWITCH PNK WIRE PNK/BLK WIRE RED WIRE RED/GRN WIRE RED/VIO WIRE RED/YEL WIRE RESTRAINT SYSTEMS CONTROL MODULE (UNDER CENTER CONSOLE, LEFT OF SHIFTER) RIGHT AIRBAGS SENSOR (UNDER RIGHT REAR SEAT) RIGHT REAR ETR SQUIB (UNDER RIGHT REAR SEAT) SB VL+ SB VL- WB L- WB L+ SB VR+ SB VR- WB R- WB R+ SB HL+ SB HL- SB HR- SB HR+ SIDE 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 WHT/YEL WIRE YEL 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

AIR PUMP ACT SOL ALTITUDE SENSOR (TOP OF ENGINE) AS SIG TWC TVA SIG BLK WIRE BLK/YEL WIRE BLU WIRE BLU/YEL WIRE BRN WIRE BRN/BLK WIRE BRN/BLU WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/VIO WIRE BRN/WHT WIRE BRN/YEL WIRE CKP- CKP+ CMP CMP TVA CT CT AS - MAF MAF OIL - TVA TVA SIG RAF RAF SIG TVA MTR ENGINE CONTROL MODULE (ME-SFI) (LEFT REAR OF ENGINE COMPT) FUEL INJECTORS GRN WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/BRN WIRE GRY/GRN WIRE GRY/YEL WIRE HOT FILM MAF SENSOR (TOP OF ENGINE) INJ 2 INJ 4 INJ 3 INJ 1 KS - KS SIG MAF PS - MAF PS SIG RAF SIG RAF MTR TVA MTR OIL SENSOR (LOWER LEFT FRONT OF ENGINE) PRESSURE SENSOR (RIGHT FRONT OF ENGINE) RAF MTR RECIRCULATED AIR FLAP ACTUATOR (RIGHT FRONT OF ENGINE) RED WIRE RED/BLU WIRE RED/GRN WIRE RED/YEL WIRE THROTTLE VALVE ACTUATOR (FRONT LEFT SIDE OF ENGINE) TWC OIL SIG TWC TEMPERATURE SENSOR VIO WIRE WHT WIRE WHT/BLU WIRE WHT/YEL WIRE YEL WIRE YEL/BLK WIRE YEL/BLU WIRE YEL/GRY WIRE YEL/WHT WIRE

ACCELERATOR PEDAL SENSOR (ABOVE PEDAL ASSEMBLY) ACTIVATED CHARCOAL FILTER SHUTOFF VALVE (ABOVE RIGHT REAR WHEELWELL) APS VLV VIMS VLV BLK/RED WIRE BLK/WHT WIRE BLU WIRE BLU/BRN WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE BRN/BLK WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/VIO WIRE BRN/WHT WIRE BRN/YEL WIRE CLUTCH PEDAL SWITCH FUEL TANK PRESSURE SENSOR (UNDER LEFT REAR SEAT) COMPUTER DATA LINES SYSTEM COOLING FANS SYSTEM DATA LINK CONNECTOR DIAG EGR ENGINE CONTROL MODULE (ME-SFI) (LEFT REAR OF ENGINE COMPT) FTP - CAN L FTP SIG FUEL INJECTORS FUEL PUMP ACF VLV AIR PUMP FAN GEN GENERATOR GRN WIRE GRN/BLU WIRE GRN/VIO WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/BRN WIRE GRY/GRN WIRE GRY/RED WIRE GRY/VIO WIRE GRY/WHT WIRE GRY/YEL WIRE INJ 5 INJ 2 INJ 6 INJ 3 KICKDOWN SWITCH (INCORPORATED W/ ACCELERATOR PEDAL ASSEMBLY) KICKDWN NCA WIRE P/N RED/BLU WIRE RED/GRN WIRE TNA VARIABLE INTAKE MANIFOLD SWITCHOVER VALVE VIO/GRN WIRE VIO/WHT WIRE VIO/YEL WIRE YEL WIRE YEL/BRN WIRE

ACCELERATOR PEDAL SENSOR (ABOVE PEDAL ASSEMBLY) ACTIVATED CHARCOAL FILTER SHUTOFF VALVE (ABOVE RIGHT REAR WHEELWELL) APS VLV VIMS VLV BLK/RED WIRE BLK/WHT WIRE BLU WIRE BLU/BRN WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE BRN/BLK WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/VIO WIRE BRN/WHT WIRE BRN/YEL WIRE CLUTCH PEDAL SWITCH FUEL TANK PRESSURE SENSOR (UNDER LEFT REAR SEAT) COMPUTER DATA LINES SYSTEM COOLING FANS SYSTEM DATA LINK CONNECTOR DIAG EGR ENGINE CONTROL MODULE (ME-SFI) (LEFT REAR OF ENGINE COMPT) FTP - CAN L FTP SIG FUEL INJECTORS FUEL PUMP ACF VLV AIR PUMP FAN GEN GENERATOR GRN WIRE GRN/BLU WIRE GRN/VIO WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/BRN WIRE GRY/GRN WIRE GRY/RED WIRE GRY/VIO WIRE GRY/WHT WIRE GRY/YEL WIRE INJ 5 INJ 2 INJ 6 INJ 3 KICKDOWN SWITCH (INCORPORATED W/ ACCELERATOR PEDAL ASSEMBLY) KICKDWN NCA WIRE P/N RED/BLU WIRE RED/GRN WIRE TNA VARIABLE INTAKE MANIFOLD SWITCHOVER VALVE VIO/GRN WIRE VIO/WHT WIRE VIO/YEL WIRE YEL WIRE YEL/BRN WIRE