Mercedes-Benz C-class W203/S203/CL203 facelift (2004-2008) (under left front door sill) Wiring diagrams

"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 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

1 2 9 10 4 31 30 CAN-B L CAN-B H 31 11 12 CAN-B H CAN-B L 4 5 CAN-B L CAN-B 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 CONTACT SWITCH (SEDAN, WAGON) (AT RIGHT "C" PILLAR) CTSY LMP EXCEPT WAGON FRONT DOME FRONT PRE-FUSE BOX (AT RIGHT REAR OF ENGINE COMPT) FUSE 2 FUSE 4 GLOVE COMPARTMENT SWITCH, LAMP HOT AT ALL TIMES HOT AT ALL TIMES FUSE 9 LEFT FRONT DOOR CONTACT SWITCH LEFT FRONT DOOR CONTROL MODULE LEFT FRONT DOOR ENTRANCE, EXIT LAMP LEFT FRONT READING LEFT READING LEFT REAR DOOR CONTACT SWITCH (SEDAN, WAGON) (AT LEFT "C" PILLAR) LEFT REAR DOOR CONTROL LEFT VANITY MIRROR LAMP OVERHEAD CONTROL PANEL CONTROL MODULE PNK/RED WIRE REAR DOME REAR DOME LAMP REAR LEFT DOME TRUNK LAMP LAMP REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT SIDE OF TRUNK/CARGO AREA) RED WIRE RED/BLU WIRE RED/GRN WIRE RED/GRY WIRE RED/YEL WIRE RELAY ENERGIZED RIGHT FRONT DOOR CONTACT SWITCH (AT RIGHT "B" PILLAR) RIGHT FRONT DOOR CONTROL MODULE RIGHT FRONT DOOR ENTRANCE, EXIT LAMP RIGHT FRONT READING RIGHT READING RIGHT REAR DOOR RIGHT REAR DOOR CONTROL MODULE RIGHT TRUNK LAMP RIGHT VANITY MIRROR LAMP TRUNK AJAR TRUNK LAMP TRUNK LID CONTACT SWITCH (AT CENTER REAR OF TRUNK LID) VIO/BLU WIRE WAGON YEL WIRE

BATTERY BRN WIRE BRN/WHT WIRE ME-SFI (ME) CONTROL MODULE, DATA LINK CONNECTOR SCREEN ANTENNA AMPLIFIER MODULE 2, SCREEN ANTENNA AMPLIFIER MODULE 1

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

1 2 3 CAN H CAN L 1 2 CAN H CAN L 1 2 CAN-B H CAN-B L 1 2 CAN-C H CAN-C L 10 11 CAN-C H CAN-C L 10 9 CAN-B H CAN-B L 11 15 CAN-C H CAN-C L 12 13 CAN-B L CAN-B H 13 12 CAN-C H CAN-C L 18 17 CAN B H CAN B L 2 1 CAN L CAN H 4 3 CAN-B H CAN-B L 41 40 CAN C H CAN C L 41 54 CAN-C H CAN-C L 5 SPEED A/T 6 5 CAN-C H CAN-C L 7 6 CAN-C H CAN-C L 7 SPEED A/T 8 7 CAN-B H CAN-B L BRN WIRE BRN/RED WIRE BRN/WHT WIRE CAN DATABUS ADAPTER CONNECTOR (BEHIND LEFT KICK PANEL) COCKPIT VOLTAGE DISTRIBUTOR CONNECTOR COMFORT AAC PUSHBUTTON CONTROL MODULE, AAC PUSHBUTTON CONTROL MODULE DI CONTROL MODULE ELECTRIC CONTROL UNIT (VGS) ELECTRONIC SELECTOR LEVER CONTROL MODULE (AT BASE OF GEAR SHIFT ASSEMBLY) ESP, BAS CONTROL MODULE (AT LEFT FRONT OF ENGINE COMPT) ETC CONTROL MODULE (EGS) (UNDER RIGHT SIDE OF DASH) FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) GRN WIRE GRN/WHT WIRE INSTRUMENT CLUSTER ME-SFI CONTROL MODULE (AT LEFT REAR OF ENGINE COMPT) OVERHEAD CONTROL PANEL CONTROL MODULE STEERING COLUMN MODULE (AT TOP OF STEERING COLUMN) UPPER CONTROL PANEL CONTROL MODULE

31 AIS AMBIENT LAMP AUTOMATIC DIMMING MIRROR BLK WIRE BLU WIRE BRN WIRE BRN/BLU WIRE BRN/RED WIRE CAN-BL CAN-BH COMPUTER DATA LINES SYSTEM EMERGENCY CALL SYSTEM CONTROL UNIT (FRONT OF CARGO AREA) FORWARD AUTOMATIC DIMMING FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE W/ FUSE, RELAY MODULE (LEFT SIDE OF TRUNK/ CARGO AREA.) GARAGE DOOR OPENER PUSHBUTTON 1 GARAGE DOOR OPENER PUSHBUTTON 2 GARAGE DOOR OPENER PUSHBUTTON 3 GARAGE DOOR OPENER TRANSMITTER UNIT GRN WIRE GRY/BLU WIRE HOT AT ALL TIMES INTERIOR LIGHTS SYSTEM COMPUTER DATA LINES SYSTEM INTERIOR REARVIEW MIRROR UNIT MIRROR SENSOR MIRROR SENSOR BACKWARD AUTOMATIC DIMMING NCA WIRE OVERHEAD CONTROL PANEL CONTROL MODULE PNK/RED WIRE POWER TOPS SYSTEM RAIN/LIGHT SENSOR (AT FRONT OF HEADLINER) REAR SAM CONTROL MODULE RED/BLU WIRE RS 31 SOS PUSHBUTTON SWITCH VIO WIRE YEL WIRE YEL/RED WIRE YEL/VIO WIRE

"C" PILLAR) 1 2 9 10 31 30 CAN-B L CAN-B H 17 18 12 13 CAN-B L CAN-B H CAN-C L CAN-C H 2 3 4 KPR 87 15 2 3 FUEL CAP FUEL CAP 3 4 CAN-B L CAN-B H 4 5 CAN-B L CAN-B H BLK 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 (SEDAN, WAGON) (AT RIGHT "C" PILLAR) COUPE, SEDAN DISPLAY DOOR CONTACT SWITCH (AT RIGHT "B" PILLAR) DOOR CONTACT SWITCH (SEDAN, WAGON) (AT LEFT FRONT PRE-FUSE BOX (AT RIGHT REAR OF ENGINE COMPT) FUEL FILLER FLAP CL MOTOR (AT RIGHT SIDE OF TRUNK) FUSE 2 FUSE 4 GRN WIRE GRN/WHT WIRE GRN/YEL WIRE HOT AT ALL TIMES INSTRUMENT CLUSTER INTERIOR CENTRAL LOCKING SWITCH LEFT FRONT DOOR CONTACT SWITCH LEFT REAR NCA WIRE OVERHEAD CONTROL PANEL CONTROL MODULE PAWL ROTARY TUMBLER SWITCH (COUPE, SEDAN) (CENTER REAR OF TAILGATE) 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 RIGHT FRONT RIGHT REAR DOOR ROOF DRIVE SYSTEM (COUPE) (AT FRONT CENTER OF ROOF) 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) UPPER CONTROL PANEL CONTROL MODULE VIO WIRE VIO/BLU WIRE WHT WIRE YEL WIRE YEL/BLU WIRE YEL/GRN WIRE

1 2 CAN B L CAN B H 9 10 CAN-B L CAN-B H BLK WIRE BLU WIRE BRN WIRE BRN/GRY WIRE BRN/RED WIRE COMPUTER DATA LINES SYSTEM FRONT PRE-FUSE BOX (AT RIGHT REAR OF ENGINE COMPT) FUSE 2 GRN WIRE HALL HALL SENSOR SENSOR HALL SENSOR HOT AT ALL TIMES NCA WIRE OVERHEAD CONTROL PANEL CONTROL MODULE POWER ROOF SWITCH REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE RED WIRE RED/BLU WIRE ROLLER SUN BLIND DRIVE UNIT (PANORAMIC SLIDING ROOF) SUN BLIND MOTOR ROOF DRIVE SYSTEM (SLIDING SUN ROOF) HALL ROOF SENSOR MOTOR VIO WIRE YEL 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