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

1 2 3 4 5 6 7 CA 87 31 MODE KICKDN DIAG CAN L CAN H 1 2 3 4 5 CB GEAR GEAR GEAR GEAR 1 PINS 2 THRU 28: NOT USED 29 30 DIAG 2-3 SHIFT VALVE LOCK UP VALVE 3-4 SHIFT VALVE 1-2/ 4-5 VALVE AUTOMATIC TRANSMISSION PROGRAM SELECTOR PUSHBUTTON BLK/BLU WIRE BLK/GRN WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BRN WIRE BRN/RED WIRE CAN (-) CAN (+) CAN L COMPUTER DATA LINES SYSTEM DIAG ELECTRONIC SELECTOR LEVER CONTROL MODULE (BASE OF GEAR SELECTOR LEVER) ETC CONTROL MODULE (UNDER RIGHT SIDE OF DASH) FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) GEAR DISPLAY SENSOR GRN WIRE GRN/WHT WIRE GRY WIRE GRY/BLU WIRE GRY/YEL WIRE ILLUM INTERLOCK SWITCH KICKDOWN SWITCH (IN ACCEL PEDAL ASSEMBLY) MODUL- ATOR VALVE PNK RPM 2 SENSOR V+ 1-2/4-5 VLV 3-4 VLV 2-3 VLV PWM VLV WIRE PNK WIRE RED/BLU WIRE RED/WHT WIRE RPM SENSOR 2 RPM SENSOR 3 SENSOR GROUND TEMP/START RPM 3 MODULATOR VLV SHIFT VLV VLV SUPPLY SHIFT VALVE TEMP SENSOR VALVE UNIT (RIGHT FRONT OF TRANSMISSION HOUSING) WHT WIRE WHT/BRN WIRE WHT/GRN WIRE YEL WIRE

1 2 3 31 30 WAKE 1 2 AMFM CLEAR CLEAR AM/FM AM/FM 1 2 CAN B L CAN B H 1 2 CLEAR CLEAR AM/FM AM/FM 1 2 CLEAR CLEAR ZF ZF 1 2 GPS CLEAR GPS GPS 1 2 ZF CLEAR CLEAR ZF ZF 1 4 2 A-ST FZU 30 2 1 30 DIAG 4 3 2 30 FZU A-ST 4 5 CAN L CAN H 6 29 23 DIAG WAKE MUTE AMPLIFIER MODULE (SCREEN ANTENNA) ANT BLK WIRE BLU/BLK WIRE BRN WIRE BRN/RED WIRE CD PLAYER COMAND OPERATING, DISPLAY, CONTROL MODULE COMPUTER DATA LINES SYSTEM CTEL INTERFACE (IF EQUIPPED) DIAG MUTE 30 ANT 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 GPS ANTENNA (IF EQUIPPED) GRN WIRE GRN/BLK WIRE HOT AT ALL TIMES NCA WIRE OPTIC CABLE CONNECTOR ORG/ WIRE REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE RED WIRE RED/BLK WIRE RED/BLU WIRE RED/YEL WIRE TELE AID TRANSMITTER/ RECEIVER (FRONT OF SPARE TIRE WELL) VOICE CONTROL MODULE (IF EQUIPPED) WAKE WAKE UP SIGNAL CONNECTOR YEL/BLK WIRE

1 2 3 4 5 6 7 8 9 10 CAN-B H CAN-B L 1 2 AMFM CLEAR CLEAR AM/FM AM/FM 1 2 CAN B L CAN B H 1 2 CLEAR CLEAR AM/FM AM/FM 1 2 CLEAR CLEAR ZF ZF 1 2 GPS CLEAR GPS GPS 1 2 ZF CLEAR CLEAR ZF ZF 1 4 2 A-ST FZU 30 2 1 30 DIAG 3 2 1 WAKE 30 31 4 3 2 30 FZU A-ST 4 5 CAN L CAN H 6 29 23 DIAG WAKE MUTE AMPLIFIER MODULE (SCREEN ANTENNA) ANT BLK WIRE BLU/BLK WIRE BRN WIRE BRN/RED WIRE CD PLAYER COMPUTER DATA LINES SYSTEM CTEL INTERFACE (IF EQUIPPED) DIAG MUTE 30 ANT 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 GPS ANTENNA (IF EQUIPPED) GRN WIRE GRN/BLK WIRE HOT AT ALL TIMES NCA WIRE OPTIC CABLE CONNECTOR ORG/ WIRE RADIO REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE RED WIRE RED/BLK WIRE RED/BLU WIRE RED/YEL WIRE TELE AID TRANSMITTER/ RECEIVER (FRONT OF SPARE TIRE WELL) VOICE CONTROL MODULE (IF EQUIPPED) WAKE WAKE UP 30 31 WAKE UP SIGNAL CONNECTOR YEL/BLK WIRE

1 2 3 4 5 6 7 8 9 10 CAN-B H CAN-B L 1 2 AMFM CLEAR CLEAR AM/FM AM/FM 1 2 CAN B L CAN B H 1 2 CLEAR CLEAR AM/FM AM/FM 1 2 CLEAR CLEAR ZF ZF 1 2 GPS CLEAR GPS GPS 1 2 ZF CLEAR CLEAR ZF ZF 1 4 2 A-ST FZU 30 1-2, 3-4, 5-6, 7-8) 2 1 30 DIAG 3 2 1 WAKE 30 31 4 3 2 30 FZU A-ST 4 5 CAN L CAN H 6 29 23 DIAG WAKE MUTE AMPLIFIER MODULE (SCREEN ANTENNA) ANT BASS MODULE LOUDSPEAKER (2.6L, 3.2L) BLK WIRE BLU/BLK WIRE BRN WIRE BRN/ PNK WIRE BRN/GRN WIRE BRN/ORG WIRE BRN/PNK WIRE BRN/RED WIRE BRN/WHT WIRE CD PLAYER COMPUTER DATA LINES SYSTEM CTEL INTERFACE (IF EQUIPPED) DIAG MUTE 30 ANT 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 GPS ANTENNA (IF EQUIPPED) GRN WIRE GRN/BLK WIRE HOT AT ALL TIMES LEFT FRONT DOOR MIRROR SPEAKER LEFT FRONT DOOR SPEAKER LEFT REAR DOOR SPEAKER NCA WIRE OPTIC CABLE CONNECTOR ORG/ WIRE PNK WIRE RADIO REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE RED WIRE RED/BLK WIRE RED/BLU WIRE RED/YEL WIRE RIGHT FRONT DOOR MIRROR SPEAKER RIGHT FRONT DOOR SPEAKER RIGHT REAR DOOR SPEAKER TELE AID TRANSMITTER/ RECEIVER (FRONT OF SPARE TIRE WELL) VOICE CONTROL MODULE (IF EQUIPPED) WAKE WAKE UP 30 31 WAKE UP SIGNAL CONNECTOR WHT WIRE YEL/BLK 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

1 29 30 DIAG 87 31 1 4 5 10 87 CAN L CAN H DIAG 1 6 7 5 2 CA 87 CAN L CAN H DIAG 31 17 1 15 6 MLS BS CAN L CAN H 2 1 CAN L CAN H 40 41 CAN L CAN H BLK WIRE BRN WIRE BRN/RED WIRE COMPUTER DATA LINES SYSTEM ELECTRONIC SELECTOR LEVER CONTROL MODULE (BASE OF GEAR SELECTOR LEVER) ESP, BAS CONTROL MODULE (LEFT SIDE OF ENGINE COMPT) ETC CONTROL MODULE (UNDER RIGHT SIDE OF DASH) 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 56 FUSE 62 FUSE 6 GRN WIRE GRN/WHT WIRE HOT AT ALL TIMES HOT IN RUN, ACC OR START PNK 5 CB WIRE PNK WIRE RED WIRE RED/BLU WIRE RED/VIO WIRE RED/WHT WIRE STOPLAMP SWITCH (ON BRAKE PEDAL BRACKET) VIO WIRE WHT/BRN WIRE WHT/GRN WIRE YEL WIRE

2001, 2002 EARLY PRODUCTION 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) NCA WIRE 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 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 2001, 2002 EARLY PRODUCTION 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 6 5 WIPE WASH 9 8 CA BLK/BLU WIRE BLK/GRY WIRE BLU 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 COMBINATION SWITCH COMPUTER DATA LINES SYSTEM COOLANT FLUID LEVEL SWITCH (IN RESERVOIR) DI CONTROL MODULE (2001, 2002 EARLY PRODUCTION) ESP, BAS CONTROL MODULE 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 31 FUSE 4 GRN WIRE GRN/WHT WIRE HI LO HI LO WIPER SWITCH HOT AT ALL TIMES INT OFF INT OFF WIPER SWITCH INTERIOR FUSE BOX (UNDER LEFT END OF DASH) MOTOR+ MOTOR- NCA WIRE OVERHEAD CONTROL PANEL CONTROL MODULE PNK/RED WIRE PNK/YEL WIRE RAIN SENSOR (FRONT OF HEADLINER) REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT SIDE OF TRUNK) 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 (2002 LATE PRODUCTION) TO WHEEL SPEED SENSORS VIO WIRE VIO/YEL WIRE WASHER FLUID LEVEL SWITCH (IN RESERVOIR) WASHER NOZZLE HEATERS WASHER NOZZLE HOSE HEATER WASHER SWITCH WINDSHIELD WASHER FLUID PUMP (ON FLUID RESERVOIR) WIPER MOTOR (LEFT REAR OF ENGINE COMPT) WIPER ON/OFF RELAY YEL/BLU 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

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