Mercedes-Benz C-class W203/S203/CL203 facelift (2004-2008) computer data lines system Wiring diagrams

BA MV- UM 1 SS RF SS RF BLA SS LR SS LR BRK WEAR BLA BLK/GRN WIRE BLK/GRY WIRE BLK/RED WIRE BLU WIRE BLU/BLK WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/WHT WIRE BLU/YEL WIRE BRAKE FLUID INDICATOR SWITCH BRAKE FLUID, PARKING BRAKE WARNING LAMP BRK WEAR BRN WIRE BRN/BLU WIRE BRN/GRN WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE CAN B H CAN B L CAN C H CAN C L CAN-C H VSS RF SPS SOL VSS LF CAN-C L 31 BA MV+ COMPUTER DATA LINES SYSTEM DIAPHRAGM TRAVEL SENSOR ESP, BAS CONTROL MODULE (AT LEFT FRONT OF ENGINE COMPT) FRONT AXLE INLET SOLENOID VALVE FRONT AXLE SWITCH- OVER SOLENOID VALVE FRONT SAM CONTROL MODULE W/ FUSE/ RELAY MODULE FUSE 56 FUSE 59 FUSE 60 GRN WIRE GRN/BLU WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE HIGH PRESSURE, RETURN PUMP MOTOR HOT AT ALL TIMES HOT W/ CIRCUIT 87 RELAY,CHASSIS INSTRUMENT CLUSTER LEFT FRONT AXLE SOLENOID VALVE (HOLD) LEFT FRONT AXLE SOLENOID VALVE (RELEASE) LEFT FRONT WHEEL SPEED SENSOR LEFT REAR AXLE SOLENOID VALVE (HOLD) LEFT REAR AXLE SOLENOID VALVE (RELEASE) LEFT REAR WHEEL SPEED SENSOR MPS UZ MP- NCA WIRE REAR AXLE INLET SOLENOID VALVE REAR AXLE SWITCH- OVER SOLENOID VALVE RED WIRE RED/BLK WIRE RED/BLU WIRE RED/GRN WIRE RED/GRY WIRE RED/VIO WIRE RED/WHT WIRE RED/YEL WIRE RELEASE SWITCH RIGHT FRONT AXLE SOLENOID VALVE (HOLD) RIGHT FRONT AXLE SOLENOID VALVE (RELEASE) RIGHT FRONT BRAKE PAD CONTACT SENSOR RIGHT FRONT WHEEL SPEED SENSOR RIGHT REAR AXLE SOLENOID VALVE (HOLD) RIGHT REAR AXLE SOLENOID VALVE (RELEASE) RIGHT REAR BRAKE PAD CONTACT SENSOR RIGHT REAR WHEEL SPEED SENSOR SIGNAL SOLENOID VALVE SPS SOLENOID VALVE (UNDER VEHICLE, ON STEERING RACK) SS RR SS RR SPS SOL SS LF SS LF 31 TURN RATE, LATERAL ACCELERATION SENSOR (AT FRONT OF CARGO AREA) VALID FOR SPS(PML) VIO/BLU WIRE VIO/WHT WIRE WHT GRN/ WIRE WHT/BLU WIRE YEL/BLU WIRE YEL/GRY WIRE YEL/RED WIRE YEL/WHT WIRE

"B" PILLAR) 3 4 SIG 31 30 CAN B L CAN B H 4 5 CAN-B L CAN-B H 4 6 LOW BEAM LOW BEAM 6 9 2 12 PARK LAMP TURN LAMP PARK LAMP TURN LAMP 7 8 TURN SIG TURN SIG ALARM SIGNAL HORN ATA HOOD SWITCH BLK WIRE BLK/ GRN WIRE BLK/GRN WIRE BLK/WHT WIRE BLU WIRE BLU/GRN WIRE BLU/RED WIRE BRN WIRE BRN/BLU WIRE BRN/GRY WIRE BRN/PNK WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM CONTACT SWITCH (AT RIGHT "B" PILLAR) CONTACT SWITCH (SEDAN, WAGON) (AT RIGHT "C" PILLAR) FRONT PRE-FUSE BOX (AT RIGHT REAR OF ENGINE COMPT) FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 2 FUSE 4 GRN WIRE GRN/YEL WIRE GRY/BLK WIRE GRY/RED WIRE HEADLIGHTS SYSTEM HOOD SW HOT AT ALL TIMES HOT AT ALL TIMES FUSE 8 LEFT FRONT DOOR CONTACT SWITCH (AT LEFT LEFT REAR DOOR CONTACT SWITCH NCA WIRE OVERHEAD CONTROL PANEL CONTROL MODULE PAWL ROTARY TUMBLER SWITCH (CENTER REAR OF TAILGATE) (COUPE) (SEDAN) PNK/RED WIRE REAR PANEL CL (ZV) MOTOR REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT SIDE OF TRUNK/CARGO AREA) RED WIRE RED/BLU WIRE RED/GRY WIRE RED/YEL WIRE RIGHT REAR DOOR ROOF DRIVE SYSTEM (COUPE) (AT FRONT CENTER OF ROOF) SCREEN ANTENNA AMPLIFIER MODULE 1 (LEFT REAR OF ROOF) SCREEN ANTENNA AMPLIFIER MODULE 2 SEDAN, COUPE TRUNK LID CONTACT SWITCH (AT CENTER REAR OF TRUNK LID) TRUNK LID EMERGENCY RELEASE SWITCH (SEDAN) (AT REAR OF TRUNK LID) TRUNK LID EXTERNAL OPERATION SWITCH (SEDAN) (IN TRUNK LID) VIO WIRE VIO/BLU WIRE WAGON WHT WIRE YEL WIRE YEL/BLK WIRE

1 6 5 8 7 ESA CAN-C H CAN-C L CAN-B H CAN-B L 11 12 CAN-B H CAN-B L 17 18 12 13 CAN-B L CAN-B H CAN-C L CAN-C H 2 3 DOOR MOTOR DOOR MOTOR 3 4 CAN-B L CAN-B H 41 54 CAN-B H CAN-B L 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 BRN WIRE BRN/RED WIRE COMPUTER DATA LINES SYSTEM DISPLAY ELECTRONIC STEERING LOCK CONTROL MODULE (ON STEERING COLUMN) ESA 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 INSTRUMENT CLUSTER INTERIOR CENTRAL LOCKING SWITCH 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 ME-SFI CONTROL MODULE (AT LEFT REAR OF ENGINE COMPARTMENT) RED WIRE RED/BLK WIRE RED/GRN WIRE RED/WHT 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 UPPER CONTROL PANEL CONTROL MODULE WHT WIRE WHT/RED WIRE

1 2 3 31 MULTIPLEX DATA OUT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 CAN-B H CAN-B L 9 10 COMPUTER DATA LINES SYSTEM CAN-B L CAN-B H A/C COMPRESSOR (LEFT FRONT OF ENGINE COMPT) AAC PUSHBUTTON CONTROL MODULE AIR LEFT HUMIDITY DEFROSTER SENSOR VENT FLAP ACTUATOR MOTOR BLK/BRN WIRE BLK/RED WIRE BLOWER MOTOR BLU WIRE BLU/BLK WIRE BLU/GRN 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 CIRCUIT 87 RELAY ENERGIZED FUSE 54 COMPUTER DATA LINES SYSTEM COOLANT CIRCULATION PUMP (W/ RESIDUAL ENGINE HEAT UTILIZATION SYSTEM) ELECTRIC SUCTION FAN ENGINE, A/C WITH INTEGRATED CONTROL ENERGIZED FUSE 51 FRESH LEFT, RIGHT AIR DEFROSTER FLAPS ACTUATOR FLAPS ACTUATOR FRONT PRE-FUSE BOX (AT RIGHT REAR OF ENGINE COMPT) FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 30 FUSE 41 FUSE 5 GRN WIRE GRN/BLU WIRE GRN/YEL WIRE GRY/BLU WIRE GRY/RED WIRE HEATING SYSTEMS RECIRCULATION UNIT HOT AT ALL TIMES IN-CAR TEMPERATURE SENSOR IN-CAR TEMPERATURE SENSOR FSN MOTOR INSTRUMENT CLUSTER SYSTEM INTERIOR FUSE BOX LEFT FOOTWELL FLAP ACTUATOR MOTOR LEFT RIGHT BLENDING BLENDING AIR FLAP AIR FLAP ACTUATOR ACTUATOR LEFT RIGHT FRESH FOOTWELL AIR FLAP FLAP ACTUATOR ACTUATOR MOTOR LEFT, RIGHT FOOTWELL FLAPS ACTUATOR ME-SFI CONTROL MODULE NCA WIRE OVERHEAD CONTROL PANEL CONTROL MODULE PURGE CONTROL VALVE (LEFT REAR CORNER OF ENGINE COMPT) REAR BLOWER ELECTRONIC SELECTOR WHEEL REAR BLOWER MOTOR REAR BLOWER MOTOR CONTROL MODULE (ON REAR BLOWER MOTOR ASSEMBLY) RED WIRE RED/BLU WIRE RED/GRN WIRE RED/WHT WIRE RED/YEL WIRE RIGHT DEFROSTER VENT FLAP ACTUATOR MOTOR RIGHT FRESH AIR FLAP ACTUATOR RV EGS VIO WIRE W/ COMFORT AAC W/ OUTSIDE TEMPERATURE INDICATOR WHT/PNK WIRE WHT/VIO WIRE

BLK/BLU WIRE BLK/RED WIRE BLU/RED WIRE BRN WIRE BRN/GRN WIRE BRN/ORG WIRE BRN/RED WIRE BRN/YEL WIRE CAN B L CAN B H COMPUTER DATA LINES SYSTEM COOLANT CIRCULATION PUMP (W/ RESIDUAL ENGINE HEAT UTILIZATION SYSTEM) COOLANT TEMPERATURE SENSOR (RIGHT FRONT OF ENGINE) ELECTRIC SUCTION FAN ENGINE, A/C WITH INTEGRATED CONTROL ENGINE CONTROLS SYSTEM FRONT PRE-FUSE BOX (AT RIGHT REAR OF ENGINE COMPT) FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 5 FUSE 54 GRN/VIO WIRE HOT AT ALL TIMES HOT WITH CIRCUIT 87 RELAY ENERGIZED ME-SFI CONTROL MODULE PURGE CONTROL VALVE (IN LEFT REAR CORNER OF ENGINE COMPT) RED WIRE RED/GRN WIRE RED/WHT WIRE RED/YEL WIRE

22 20 19 21 UREF 2 6 3 AP MO- AP MO+ 9 10 11 12 13 8 30 CAN-C H CAN-C L CAN-B L CAN-B H 31 ACCEL SET/ ACCELERATOR PEDAL SENSOR (TOP OF ACCELERATOR PEDAL ASSEMBLY) BLK WIRE BLU WIRE BLU/BRN WIRE BRN WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE CAN C H CAN C L CC SWITCH COMPUTER DATA LINES SYSTEM CONTACT DEC DECEL/ SET FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) GRN WIRE GRN/WHT WIRE GRY WIRE ME-SFI CONTROL MODULE (AT LEFT REAR OF ENGINE COMPT) MR IP OFF RED WIRE RED/BLU WIRE RES+ RESUME SAFETY THROTTLE VALVE ACTUATOR (AT REAR OF ENGINE) VIO WIRE VIO/GRN WIRE VIO/YEL WIRE WHT WIRE YEL WIRE

1 2 3 4 NA KPR 1 2 5 CAN-B L CAN-B H NA 2 3 4 5 6 7 8 9 10 FROM FANFARE HORNS RELAY (DIAGRAM 1 OF 3) 7 4 1 KPR 87 15 9 10 11 12 FROM FUSE 53 (DIAGRAM 1 OF 3) 9 15 16 8 DATA LINK CONNECTOR (UNDER LEFT SIDE OF DASH) AIR PUMP 15 HOOD 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/ORG WIRE BRN/RED WIRE COMPUTER DATA LINES SYSTEM COOLING FANS SYSTEM (CL) CPP BRIDGE DI CONTROL MODULE DIAG ENGINE CONTROLS SYSTEM ENGINE CONTROLS SYSTEM (EXCEPT CL) ENGINE CONTROLS SYSTEM ENGINE CONTROLS SYSTEM FROM FUSE 47 (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) GRN/BLU WIRE GRY/BLU WIRE GRY/YEL WIRE HEADLIGHTS SYSTEM HORNS SYSTEM ENGINE CONTROLS SYSTEM HOT AT ALL TIMES FUSE 57 HOT AT ALL TIMES FUSE 59 HOT AT ALL TIMES FUSE 60 HOT AT ALL TIMES FUSE 62 HOT AT ALL TIMES FUSE 63 HOT AT ALL TIMES FUSE 64 INSTRUMENT CLUSTER AIR CONDITIONING 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 VIO/BLU WIRE VIO/WHT WIRE YEL WIRE

1 2 3 15 XENON DIAGNOS VSS LF SIG OUT 1 2 3 4 5 6 7 8 9 10 DIAG 1 2 3 4 5 6 L FOG R FOG L HI L LO R HI R LO 1 2 3 CRASH SIG 1 2 A/C COMP 1 2 PNK DIAG WIRE A/C SYSTEM BLK WIRE BLK/BLU WIRE BLK/GRN WIRE BLK/GRY WIRE BLK/PNK WIRE BLK/WHT 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/RED WIRE BRN/VIO WIRE BRN/WHT WIRE BRN/YEL WIRE CAN-B L CAN-B H BACKUP COMPUTER DATA LINES SYSTEM COOL LVL CPP DIAG DATA LINK CONNECTOR (UNDER LEFT SIDE OF DASH) DI CONTROL MODULE DIAG DLC ECM ECM DLC EMERGENCY CALL SYSTEM CONTROL UNIT (FRONT OF CARGO AREA) ENGINE CONTROLS SYSTEM EXTERIOR LIGHTS SYSTEM EXTERIOR LIGHTS SYSTEM EXTERIOR LIGHTS SYSTEM WARNING SYSTEMS WARNING SYSTEMS EXTERIOR LIGHTS SYSTEM FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) GRN WIRE GRN/BLK WIRE GRN/GRY WIRE GRN/PNK WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/RED WIRE GRY/WHT WIRE GRY/YEL WIRE HEADLIGHTS SYSTEM HEADLIGHTS SYSTEM (XENON) LAMP SW LAMP SW LAMP SW LAMP SW LAMP SW LF MARK RF MARK BRK LVL PARK BRK NAVIGATION SYSTEM PNK WIRE R PRESS R PRESS FAN SRA R PRESS RED/GRY WIRE RED/WHT WIRE RED/YEL WIRE RF TURN LF PARK TRANSMISSION SYSTEM TRANSMISSION SYSTEM COMPUTER DATA LINES SYSTEM VIO/YEL WIRE WASH LVL WHT WIRE WHT/BLK WIRE WHT/BRN WIRE WHT/GRN WIRE WHT/PNK WIRE WIPER/WASHER SYSTEM YEL WIRE YEL/BLK WIRE

6 7 5 4 CAN-B H CAN-B L 30 31 7 5 HEAT HEAT 7 5 SH (+) SH (-) AAC PUSHBUTTON CONTROL MODULE, COMFORT AAC PUSHBUTTON CONTROL MODULE BLK WIRE BLK/RED WIRE BLU WIRE BRN WIRE BRN/GRY WIRE BRN/RED WIRE CAN-B H CAN-B L 30 COMPUTER DATA LINES SYSTEM DEFROSTER SWITCH FRONT PASSENGER SIDE DOOR CONTROL MODULE (IN RIGHT FRONT DOOR) FUSE 21 FUSE 22 FUSE 41 GRY WIRE HOT AT ALL TIMES INTERIOR FUSE BOX (LEFT END OF DASH) LEFT EXTERIOR MIRROR LEFT FRONT DOOR CONTROL MODULE (IN DRIVER'S DOOR) NCA WIRE RED WIRE RED/BLU WIRE RED/WHT WIRE RIGHT EXTERIOR MIRROR UPPER CONTROL PANEL CONTROL MODULE WHT WIRE

AAC PUSHBUTTON CONTROL MODULE, COMFORT AAC PUSHBUTTON CONTROL MODULE BLK WIRE BLU WIRE BRN WIRE BRN/GRY WIRE BRN/RED WIRE CAN B L CAN B H CAN-B H CAN-B L 30 COMPUTER DATA LINES SYSTEM FRONT PRE-FUSE BOX (AT RIGHT REAR OF ENGINE COMPT) FUSE FUSE 2 FUSE 41 HEATED REAR WINDOW HOT AT ALL TIMES INTERIOR FUSE BOX (LEFT END OF DASH) REAR SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT SIDE OF TRUNK/CARGO AREA) REAR WINDOW DEFROSTER RELAY REAR WINDOW DEFROSTER SWITCH RED WIRE RED/BLU WIRE UPPER CONTROL PANEL CONTROL MODULE