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

1 2 9 10 8 31 30 CAN L CAN H 31 11 12 CAN-B H CAN-B L 4 5 CAN L CAN H 6 7 CAN-B H CAN-B L BLK WIRE BLU/RED WIRE BRN WIRE BRN/BLU WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/PNK WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM CTSY LMP EXCEPT WAGON FRONT DOME FRONT PRE-FUSE BOX (RIGHT REAR OF ENGINE COMPT) FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 2 FUSE 4 FUSE 47 GLOVE COMPARTMENT SWITCH, LAMP HOT AT ALL TIMES HOT IN RUN OR START LEFT FRONT DOOR CONTACT SWITCH LEFT FRONT DOOR CONTROL MODULE LEFT FRONT DOOR ENTRANCE, EXIT LAMP LEFT READING LEFT REAR DOOR CONTACT SWITCH (SEDAN, WAGON) LEFT REAR DOOR CONTROL LEFT REAR DOOR ENTRANCE, EXIT LAMP LEFT VANITY MIRROR LAMP OVERHEAD CONTROL PANEL CONTROL MODULE PNK/RED WIRE REAR DOME REAR DOME LAMP REAR DOME LAMP LEFT TRUNK LAMP REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT SIDE OF TRUNK) RED WIRE RED/BLU WIRE RED/GRN WIRE RED/GRY WIRE RED/YEL WIRE RIGHT FRONT DOOR CONTACT SWITCH RIGHT FRONT DOOR CONTROL MODULE RIGHT FRONT DOOR ENTRANCE, EXIT LAMP RIGHT READING RIGHT REAR DOOR CONTACT SWITCH (SEDAN, WAGON) RIGHT REAR DOOR CONTROL MODULE RIGHT REAR DOOR ENTRANCE, EXIT LAMP RIGHT TRUNK LAMP RIGHT VANITY MIRROR LAMP TRUNK AJAR TRUNK LAMP (EXCEPT WAGON) TRUNK LID CONTACT SWITCH VIO/BLU WIRE WAGON YEL WIRE

17 18 12 13 CAN-B L CAN-B H CAN-B L CAN-B H 2 1 CAN L CAN H 4 5 CAN L CAN H 6 5 2 4 3 1 R LO BEAM R HI BEAM R FOG L LO BEAM L HI BEAM L FOG 9 10 CAN-B L CAN-B H AMBIENT LIGHT, ROAD AHEAD SENSORS AUTOMATIC LIGHT SWITCH DAYLIGHT SENSOR (FRONT OF HEADLINER) BLK WIRE BLK/GRN WIRE BLK/PNK WIRE BLU WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE BRN/BLU WIRE BRN/GRN WIRE BRN/RED WIRE COMPUTER DATA LINES SYSTEM DIAG EXTERIOR LAMPS FOG LAMP FOG LAMP IND FRONT AXLE SENSOR FRONT PRE-FUSE BOX (RIGHT REAR OF ENGINE COMPT) FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 4 FUSE 50 FUSE 51 FUSE 62 FUSE 63 GRN WIRE GRN/BLK WIRE GRN/PNK WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE GRY/BLU WIRE GRY/YEL WIRE HEAD AUTO HEADLAMP RANGE ADJUSTMENT MOTOR HEADLAMP WASH HIGH BEAM INDICATOR HIGH XENON BEAM XENON BEAM HOT AT ALL TIMES HOT IN RUN OR START IN OUT INSTRUMENT CLUSTER LAMP SWITCH MODULE LEFT FRONT FOG LAMP LEFT HEADLAMP UNIT LEFT RIGHT MIRROR FOLD- MIRROR SELECT MIRROR ADJUST OVERHEAD CONTROL PANEL CONTROL MODULE PARK OFF REAR AXLE SENSOR RED WIRE RED/GRN WIRE RED/YEL WIRE RIGHT FRONT FOG LAMP RIGHT HEADLAMP UNIT WHT WIRE WHT/BLK WIRE WHT/RED WIRE XENON CONTROL MODULE XENON IGNITION MODULE XENON CONTROL MODULE XENON IGNITION MODULE HIGH XENON BEAM XENON BEAM YEL WIRE YEL/BLK WIRE YEL/WHT WIRE

1 2 3 4 31 30 CAN-B L CAN-B H 4 1 2 30 RF HTD SEAT LF HTD SEAT BLK/GRY WIRE BLK/VIO WIRE BLU WIRE BRN WIRE BRN/RED WIRE COMFORT AAC PUSHBUTTON CONTROL MODULE COMPUTER DATA LINES SYSTEM FUSE 25 FUSE 41 GRN WIRE HOT AT ALL TIMES INTERIOR FUSE BOX (UNDER LEFT END OF DASH) LEFT FRONT HEATED BACKREST CUSHION LEFT FRONT HEATED SEAT CUSHION LEFT FRONT HEATED SEAT SWITCHES NCA WIRE RED WIRE RED/BLU WIRE RED/GRN WIRE RIGHT FRONT HEATED BACKREST CUSHION RIGHT FRONT HEATED SEAT CUSHION RIGHT FRONT HEATED SEAT SWITCHES UPPER CONTROL PANEL CONTROL MODULE

1 2 3 6 7 8 ESA SW ESA SW ESA SW ESA SW ESA SW ESA SW 2 1 CAN L CAN H 2 MEMORY LOCATION 3 9 4 6 1 7 5 10 8 U/D MTR COMMON L/R MTR DIM DIM HEAT HEAT TURN TURN 3 9 4 7 5 10 8 U/D MTR COMMON L/R MTR HEAT HEAT TURN TURN 4 3 10 7 8 9 FOLD FOLD POS 2 (+) POS 1 (-) 4 5 CAN L CAN H 6 7 5 4 CAN-B H CAN-B L 30 31 BLK WIRE BLK/GRN WIRE BLK/RED WIRE BLK/YEL WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE BRN/BLU WIRE BRN/GRY WIRE BRN/RED WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM EXTERIOR LAMPS FOG LAMP FOG LAMP IND FOLD-IN MOTOR FOLD-IN MOTOR FRONT PRE-FUSE BOX (RIGHT REAR OF ENGINE COMPT) FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 4 FUSE 50 FUSE 6 FUSE 62 FUSE 63 GRN WIRE GRN/BLK WIRE GRN/PNK WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE GRY/BLU WIRE GRY/YEL WIRE HEAD HEADLAMP WASH HEATING ELEMENT HEATING ELEMENT AUTO DIM HOT AT ALL TIMES HOT AT ALL TIMES HOT AT ALL TIMES HOT IN RUN OR START IN OUT INTERIOR FUSE BOX (UNDER LEFT END OF DASH) FUSE 22 FUSE 21 LAMP SWITCH MODULE LEFT EXTERIOR MIRROR LEFT FRONT DOOR CONTROL MODULE LEFT FRONT DOOR ESA SWITCH GROUP LEFT RIGHT MEMORY STORE MIRROR ADJUST MIRROR FOLD- MIRROR SELECT MOTORS, POSITION SENSORS (LEFT/RIGHT, UP/ DOWN) NCA WIRE PARK OFF AUTO PNK/BLK WIRE PNK/RED WIRE RED WIRE RED/GRN WIRE RED/WHT WIRE RED/YEL WIRE RIGHT EXTERIOR MIRROR RIGHT FRONT DOOR CONTROL MODULE TURN SIGNAL WHT WIRE YEL WIRE YEL/GRN WIRE YEL/WHT WIRE

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 (+) (+) 5 6 MHEAD (-) MLK (-) 6 7 5 CAN-B H CAN-B L 30 BACKREST BLK WIRE BLK/PNK WIRE BLU WIRE BRN WIRE BRN/GRY WIRE BRN/RED WIRE CAN B L CAN B H CL MODELS COMPUTER DATA LINES SYSTEM EXCEPT CL MODELS FRONT (RAISE/ LOWER) FRONT PRE-FUSE BOX (RIGHT REAR OF ENGINE COMPT) FUSE 2 FUSE 22 FUSE 38 FUSE 40 GRN WIRE HEAD RESTRAINT (RAISE/ LOWER) HOT AT ALL TIMES INTERIOR FUSE BOX (UNDER LEFT END OF DASH) MEMORY LOCATION MEMORY STORE MHH (+) MHH (-) MHV (+) MHV (-) MLH (+) MLH (-) NCA WIRE PASSENGER FRONT SEAT ADJUSTMENT CONTROL MODULE (UNDER SEAT) PASSENGER SEAT BACKREST RELEASE MICROSWITCH (CL MODELS) PASSENGER SEAT FORWARD/BACK ADJUSTMENT MOTOR PASSENGER SEAT HEAD RESTRAINT RAISE/LOWER ADJUSTMENT MOTOR PASSENGER SEAT HEIGHT RELEASE MICROSWITCH (CL MODELS) PASSENGER SEAT REAR UP/DOWN ADJUSTMENT MOTOR REAR (RAISE/ LOWER) REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT SIDE OF TRUNK) RED WIRE RED/GRN WIRE RED/WHT WIRE RIGHT FRONT DOOR CONTROL MODULE RIGHT FRONT DOOR ESA SWITCH GROUP SEAT (FORWARD/ BACK) VIO WIRE WHT WIRE

11 12 CAN-B H CAN-B L 11 15 CAN-B H CAN-B 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 FUSE 21 FUSE 22 FUSE 33 GRN WIRE GRN/WHT WIRE HOT AT ALL TIMES INTERIOR FUSE BOX (UNDER LEFT END OF DASH) FUSE 32 LEFT FRONT DOOR CENTRAL LOCKING MOTOR LEFT FRONT DOOR CONTROL MODULE LEFT FRONT IR RECEIVER LEFT REAR DOOR CENTRAL LOCKING MOTOR LEFT REAR DOOR CONTROL MODULE (SEDAN, WAGON) RED WIRE RED/BLK WIRE RED/GRN WIRE RED/GRY WIRE RED/WHT WIRE RED/YEL WIRE RIGHT FRONT DOOR CENTRAL LOCKING MOTOR RIGHT FRONT DOOR CONTROL MODULE RIGHT FRONT IR RECEIVER RIGHT REAR DOOR CENTRAL LOCKING MOTOR RIGHT REAR DOOR CONTROL MODULE (SEDAN, WAGON) TO WHEEL SPEED SENSORS WHT WIRE

2 1 CAN L CAN H 3 9 4 6 1 7 5 10 8 U/D MTR COMMON L/R MTR DIM DIM HEAT HEAT TURN TURN 3 9 4 7 5 10 8 U/D MTR COMMON L/R MTR HEAT HEAT TURN TURN 4 3 FOLD FOLD 4 5 CAN L CAN H 6 7 5 4 CAN-B H CAN-B L 30 31 BLK WIRE BLK/GRN WIRE BLK/RED WIRE BLK/YEL WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE BRN/BLU WIRE BRN/GRY WIRE BRN/RED WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM EXTERIOR LAMPS FOG LAMP FOG LAMP IND FRONT PRE-FUSE BOX (RIGHT REAR OF ENGINE COMPT) FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 21 FUSE 4 FUSE 50 FUSE 6 FUSE 62 FUSE 63 GRN WIRE GRN/BLK WIRE GRN/PNK WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE GRY/BLU WIRE GRY/YEL WIRE HEAD HEADLAMP WASH HEATING ELEMENT HEATING ELEMENT LEFT/ RIGHT MOTOR HOT AT ALL TIMES HOT IN RUN OR START IN OUT INTERIOR FUSE BOX (UNDER LEFT END OF DASH) FUSE 22 LAMP SWITCH MODULE LEFT EXTERIOR MIRROR LEFT FRONT DOOR CONTROL MODULE LEFT RIGHT LEFT/ RIGHT MOTOR AUTO DIM MIRROR ADJUST MIRROR FOLD- MIRROR SELECT NCA WIRE PARK OFF AUTO PNK/BLK WIRE PNK/RED WIRE RED WIRE RED/GRN WIRE RED/WHT WIRE RED/YEL WIRE RIGHT EXTERIOR MIRROR RIGHT FRONT DOOR CONTROL MODULE TURN SIGNAL UP/ DOWN MOTOR FOLD-IN MOTOR WHT WIRE YEL WIRE

1 2 CAN B L CAN B H 3 2 CAN-B L CAN-B H BLK/GRN WIRE BLK/WHT WIRE BLU WIRE BRN WIRE BRN/GRY WIRE BRN/RED WIRE COMFORT AAC PUSHBUTTON CONTROL MODULE COMPUTER DATA LINES SYSTEM COUPE FRONT PRE-FUSE BOX (RIGHT REAR OF ENGINE COMPT) FUSE 2 FUSE 20 FUSE 25 FUSE 41 GRN WIRE HOT AT ALL TIMES HTO AT ALL TIMES INTERIOR FUSE BOX (UNDER LEFT END OF DASH) REAR BLIND SWITCH REAR ROLLER BLIND MOTOR REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT SIDE OF TRUNK) REAR SCREEN BLIND RELAY (LEFT SIDE OF TRUNK) RED WIRE RED/BLU WIRE RED/GRN WIRE UPPER CONTROL PANEL CONTROL MODULE WHT 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

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