Mercedes-Benz C-class W203/S203/CL203 facelift (2004-2008) nca Wiring diagrams

1 2 CAN B L CAN B H 1 2 MOST 1 2 3 4 5 6 7 8 9 10 11 12 13 IN OUT 30 WAKE UP 4 5 CAN L CAN H BLK WIRE BLU/BLK WIRE BRN WIRE BRN/GRN WIRE BRN/ORG WIRE BRN/PNK WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE COMMAND OPERATING, DISPLAY, CONTROL MODULE COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM EMERGENCY CALL SYSTEM CONTROL UNIT (W/O SOUND SYSTEM) (FRONT OF CARGO AREA) FAN MOTOR 1 WALKMAN SEPERATION POINT FAN MOTOR 2 FRONT PRE-FUSE BOX (AT RIGHT REAR OF ENGINE COMPT) FRONT SAM CONTROL UNIT, WITH FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 2 FUSE 4 GPS 1 2 3 4 5 6 7 8 GRN WIRE HOT AT ALL TIMES MUTE NCA WIRE ORG/ WIRE PNK WIRE RADIO ADDITIONAL FAN (FRONT OF CENTER CONSOLE) REAR SAM CONTROL UNIT WITH FUSE, RELAY MODULE (AT LEFT SIDE OF TRUNK) RED WIRE RED/BLU WIRE RED/GRY WIRE RED/YEL WIRE SCREEN ANTENNA AMPLIFIER MODULE 1 (WAGON) (LEFT REAR OF ROOF) SCREEN ANTENNA AMPLIFIER MODULE 2 (TOP LEFT OF TAILGATE) WAGON COUPE, SEDAN WAKE UP SIGNAL CONNECTOR WHT WIRE YEL WIRE YEL/BLK WIRE ZF 1 2 3 4 5 6 7 8 9 10 11 12

1 MOST IN 2 MOST OUT BASS MODULE LOUD SPEAKER (SEDAN) BRN/GRN WIRE BRN/ORG WIRE BRN/PNK WIRE BRN/WHT WIRE CD CHANGER EMERGENCY CALL SYSTEM CONTROL UNIT (FRONT OF CARGO AREA) GPS GPS ANTENNA (WAGON: AT TOP LEFT OF TAILGATE) GPS ANTENNA SPLITTER GRN WIRE LEFT FRONT DOOR MIRROR TRIANGLE SPEAKER (WAGON) (SEDAN) (COUPE) LEFT FRONT DOOR SPEAKER (WAGON) (SEDAN) (COUPE) LEFT REAR DOOR SPEAKER (WAGON) (SEDAN) (COUPE) NCA WIRE ORG/ WIRE PNK WIRE RIGHT FRONT DOOR MIRROR TRIANGLE SPEAKER (WAGON) (SEDAN) (COUPE) RIGHT FRONT DOOR SPEAKER (WAGON) (SEDAN) (COUPE) RIGHT REAR DOOR SPEAKER (WAGON) (SEDAN) (COUPE) SOUND AMPLIFIER W/O SOUND SYSTEM 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 (LEFT END OF DASH) LEFT FRONT HEATED SEAT SWITCHES LEFT LEFT FRONT FRONT HEATED HEATED BACKREST SEAT CUSHION CUSHION 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 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

1 2 MOST MOST IN MOST OUT 30 WAKE UP BASS MODULE LOUDSPEAKER BLK WIRE BLU/BLK WIRE BRN WIRE BRN/GRN WIRE BRN/ORG WIRE BRN/PNK WIRE BRN/RED WIRE BRN/WHT WIRE CAN B L MUTE CAN B H 31 CD CHANGER (IN GLOVE COMPT) COMPUTER DATA LINES SYSTEM NAVIGATION SYSTEM COMPUTER DATA LINES SYSTEM COUPE EARLY FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 24 GRN WIRE HOT AT ALL TIMES INTERIOR FUSE BOX (LEFT END OF DASH) LATE LEFT FRONT DOOR MIRROR TRIANGLE SPEAKER LEFT FRONT DOOR SPEAKER LEFT REAR DOOR SPEAKER MOST BUS CIRCUIT NCA WIRE ORG/ WIRE PNK WIRE RADIO RED WIRE RED/BLU WIRE RED/PNK WIRE RIGHT FRONT DOOR MIRROR TRIANGLE SPEAKER RIGHT FRONT DOOR SPEAKER RIGHT REAR DOOR SPEAKER SEDAN, COUPE WAGON WAGON SEDAN WAKE-UP WALKMAN SEPARATION POINT WHT WIRE YEL WIRE YEL/BLK WIRE ZF 1 2 3 4 5 6 7 8 9 10 11 12

AMPLIFIER MODULE 1, SCREEN ANTENNA (WAGON) (LEFT REAR OF ROOF) AMPLIFIER MODULE 2, SCREEN ANTENNA (WAGON) (TOP LEFT OF TAILGATE) BLK WIRE BRN WIRE COUPE GRN WIRE NCA WIRE REAR SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT SIDE OF RED/GRY WIRE RED/YEL WIRE SEDAN TRUNK/CARGO AREA) WAGON WAGON COUPE ZF 1 2 3

1 2 MOST MOST IN MOST OUT BLK WIRE BLU/BLK WIRE BRN WIRE FUSE 16 HOT AT ALL TIMES MOST BUS CIRCUIT NCA WIRE ORG/ WIRE REAR SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT SIDE OF TRUNK/CARGO AREA) RED WIRE RED/BLK WIRE SAT SDAR CONTROL UNIT (AT RIGHT REAR OF TRUNK) SDAR TRUNK LID ANTENNA PREINSTALLATION CONNECTOR 1 SDAR TRUNK LID ANTENNA PREINSTALLATION CONNECTOR 2 TER WAKE-UP WHT WIRE

1 2 CAN B L CAN B H 2 19 15 22 18 TRUNK EMERG TRUNK EMERG TRUNK EXT TRUNK MOTOR TRUNK AJAR 4 5 CAN L CAN H BLU/GRN WIRE BLU/RED WIRE BRN WIRE BRN/RED WIRE COMPUTER DATA LINES SYSTEM FRONT PRE-FUSE BOX (RIGHT REAR OF ENGINE COMPT) FUSE 2 FUSE 4 GRN WIRE GRN/YEL WIRE HOT AT ALL TIMES NCA WIRE PNK/RED WIRE REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT SIDE OF TRUNK/CARGO AREA) RED WIRE TRUNK LID EMERGENCY RELEASE SWITCH (AT REAR OF TRUNK LID) TRUNK LID EXTERNAL OPERATION SWITCH (IN TRUNK LID) VIO/BLU WIRE YEL WIRE

1 2 MOST MOST IN MOST OUT BLU/BLK WIRE BRN WIRE EARLY PRODUCTION LATE PRODUCTION GRN WIRE GRY WIRE HANDS-FREE SYSTEM MICROPHONE GROUP MIC 2+ MIC GND NCA WIRE ORG/ WIRE PNK MIC 1 MIC 3 MIC 4 WIRE PNK WIRE REAR SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT SIDE OF TRUNK/ CARGO AREA) RED/BLK WIRE SHIELD VIO WIRE VOICE CONTROL SYSTEM CONTROL MODULE (WAGON: AT FRONT OF CARGO AREA) WAKE UP 31

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 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 9 8 CA BLK/BLU WIRE BLK/GRY 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 COLUMN) COMBINATION SWITCH COMPUTER DATA LINES SYSTEM COOLANT LEVEL INDICATOR SWITCH (RIGHT FRONT OF ENGINE COMPT) DI CONTROL MODULE ESP, BAS CONTROL MODULE (AT LEFT FRONT OF ENGINE COMPT) FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 2 FUSE 31 FUSE 4 GRN WIRE GRN/WHT WIRE HOT AT ALL TIMES HOT AT ALL TIMES FRONT PRE-FUSE BOX (AT RIGHT REAR OF ENGINE COMPT) FUSE 6 INTERIOR FUSE BOX (LEFT END OF DASH) MOTOR+ MOTOR- NCA WIRE OVERHEAD CONTROL PANEL CONTROL MODULE PNK/RED WIRE RAIN/LIGHT SENSOR (AT FRONT OF HEADLINER) REAR SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT SIDE OF TRUNK/CARGO AREA) 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 (AT TOP OF STEERING TO WHEEL SPEED SENSORS VIO WIRE VIO/YEL WIRE WASHER NOZZLE HEATERS WASHER NOZZLE HOSE HEATER WINDSHIELD WASHER SYSTEM SWITCH WIPER MOTOR (AT LEFT REAR OF ENGINE COMPT) WIPER ON/OFF RELAY WIPER SWITCH YEL WIRE YEL/BLU WIRE