Mercedes-Benz C-class W204/S204 (2006-2011) (left front footwell) Wiring diagrams

1 2 3 4 5 6 7 8 HR+ VR+ 1 2 3 4 MOST OUT MOST IN 6 4 2 1 PNK WIRE ANST ANT BT SHIELD ANT GPS SHIELD AUDIO/COMAND DISPLAY AUX GND AUX R AUX JACK ELECTRICAL CONNECTOR AUX SHIELD AUX L BLK WIRE BLK/WHT WIRE BLU WIRE BLU/BLK WIRE BLU/WHT WIRE BLUETOOTH ANTENNA BRN WIRE BRN/GRN WIRE BRN/ORG WIRE BRN/PNK WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE CAN A L CAN A H DIAG (+) CAN B H 31 ON/OFF CAN B L COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM FM, AM, CL ANTENNA AMPLIFIER (CENTER FRONT OF ROOF) FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 26 FUSE 16 GPS GPS 1 GRN WIRE GRN/WHT WIRE GRN/YEL WIRE HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED HR- VR- INSTRUMENT CLUSTER, AUDIO/COMAND DISPLAY FAN MOTOR (UNDER LEFT SIDE OF DASH) LEFT FRONT DOOR BASS SPEAKER LEFT FRONT DOOR SPEAKER (W/O SOUND SYSTEM) LEFT FRONT DOOR TWEETER MOBILE PHONE ELECTRICAL CONNECTOR MULTI-FUNCTION ANTENNA NCA NCA WIRE NCA WIRE ORG/ WIRE ORG/WHT WIRE PNK 1 2 3 4 5 6 7 8 9 10 11 12 MIC 1+ MIC 2+ SHIELD WIRE PNK WIRE RADIO W/ AUTO PILOT SYSTEM REAR WINDOW ANTENNA AMPLIFIER 1 (CENTER REAR OF ROOF) RED WIRE RED/WHT RED WIRE RED/WHT WIRE RED/YEL WIRE RIGHT FRONT DOOR BASS SPEAKER RIGHT FRONT DOOR SPEAKER (W/O SOUND SYSTEM) RIGHT FRONT DOOR TWEETER SHIELD SHIELD FM 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 SOUND SYSTEMS VIO WIRE VL HL VL+ HL+ PNK WIRE VOICE CONTROL SYSTEM MICROPHONE W/ MODEL CODE 204.0 W/ MODEL CODE 204.2 WAKE-UP WHT WIRE WHT/YEL WIRE YEL WIRE

1 2 3 4 5 6 7 8 HR+ VR+ 1 2 3 4 MOST OUT MOST IN 6 4 2 1 PNK WIRE ANST ANT BT SHIELD ANT GPS SHIELD AUDIO/COMAND DISPLAY AUX GND AUX R AUX JACK ELECTRICAL CONNECTOR AUX SHIELD AUX L BLK WIRE BLK/WHT WIRE BLU WIRE BLU/BLK WIRE BLU/WHT WIRE BLUETOOTH ANTENNA BRN WIRE BRN/GRN WIRE BRN/ORG WIRE BRN/PNK WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE CAN A L CAN A H DIAG (+) CAN B H 31 ON/OFF CAN B L COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM FM, AM, CL ANTENNA AMPLIFIER (CENTER FRONT OF ROOF) FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 26 FUSE 16 GPS GPS 1 GRN WIRE GRN/WHT WIRE GRN/YEL WIRE HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED HR- VR- INSTRUMENT CLUSTER, AUDIO/COMAND DISPLAY FAN MOTOR (UNDER LEFT SIDE OF DASH) LEFT FRONT DOOR BASS SPEAKER LEFT FRONT DOOR SPEAKER (W/O SOUND SYSTEM) LEFT FRONT DOOR TWEETER MOBILE PHONE ELECTRICAL CONNECTOR MULTI-FUNCTION ANTENNA NCA NCA WIRE NCA WIRE ORG/ WIRE ORG/WHT WIRE PNK 1 2 3 4 5 6 7 8 9 10 11 12 MIC 1+ MIC 2+ SHIELD WIRE PNK WIRE RADIO W/ AUTO PILOT SYSTEM REAR WINDOW ANTENNA AMPLIFIER 1 (CENTER REAR OF ROOF) RED WIRE RED/WHT RED WIRE RED/WHT WIRE RED/YEL WIRE RIGHT FRONT DOOR BASS SPEAKER RIGHT FRONT DOOR SPEAKER (W/O SOUND SYSTEM) RIGHT FRONT DOOR TWEETER SHIELD SHIELD FM 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 SOUND SYSTEMS VIO WIRE VL HL VL+ HL+ PNK WIRE VOICE CONTROL SYSTEM MICROPHONE W/ MODEL CODE 204.0 W/ MODEL CODE 204.2 WAKE-UP WHT WIRE WHT/YEL WIRE YEL WIRE

1 2 3 4 5 6 7 8 HR+ VR+ 1 2 3 4 MOST OUT MOST IN 6 4 2 1 PNK WIRE ANST AUDIO/COMAND DISPLAY AUX JACK ELECTRICAL CONNECTOR BLK WIRE BLK/WHT WIRE BLU WIRE BLU/BLK WIRE BLU/WHT WIRE BRN WIRE BRN/GRN WIRE BRN/ORG WIRE BRN/PNK WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE CAN A L CAN A H DIAG (+) CAN B H 31 ON/OFF CAN B L COMAND CONTROL UNIT COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM EMERGENCY CALL SYSTEM CONTROL UNIT (CENTER FRONT OF TRUNK) FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 26 FUSE 16 GND MIC - AUX GND AUX R GRN WIRE GRN/WHT WIRE GRN/YEL WIRE HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED HR- VR- INSTRUMENT CLUSTER, AUDIO/COMAND DISPLY FAN MOTOR (UNDER LEFT SIDE OF DASH) LEFT REAR DOOR SPEAKER (W/O SOUND SYSTEM) MOBILE PHONE ELECTRICAL CONNECTOR NCA NCA WIRE NCA WIRE ORG/ WIRE ORG/WHT WIRE PNK 1 2 3 4 5 6 7 8 9 10 11 12 MIC 1+ MIC 2+ SHIELD MIC + AUX SHIELD AUX L WIRE PNK WIRE RED WIRE RED/WHT RED WIRE RED/WHT WIRE RED/YEL WIRE RIGHT REAR DOOR SPEAKER (W/O SOUND SYSTEM) SOUND SYSTEMS VIO WIRE VL HL VL+ HL+ PNK WIRE VOICE CONTROL SYSTEM MICROPHONE W/ MOBILE PHONE PRE INSTALLATION W/O MOBILE PHONE PRE INSTALLATION WAKE-UP WHT WIRE WHT/YEL WIRE YEL WIRE

1 2 3 4 5 6 7 8 HR+ VR+ 1 2 3 4 MOST OUT MOST IN 6 4 2 1 PNK WIRE ANST AUDIO/COMAND DISPLAY AUX JACK ELECTRICAL CONNECTOR BLK WIRE BLK/WHT WIRE BLU WIRE BLU/BLK WIRE BLU/WHT WIRE BRN WIRE BRN/GRN WIRE BRN/ORG WIRE BRN/PNK WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE CAN A L CAN A H DIAG (+) CAN B H 31 ON/OFF CAN B L COMAND CONTROL UNIT COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM EMERGENCY CALL SYSTEM CONTROL UNIT (CENTER FRONT OF TRUNK) FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 26 FUSE 16 GND MIC - AUX GND AUX R GRN WIRE GRN/WHT WIRE GRN/YEL WIRE HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED HR- VR- INSTRUMENT CLUSTER, AUDIO/COMAND DISPLY FAN MOTOR (UNDER LEFT SIDE OF DASH) LEFT REAR DOOR SPEAKER (W/O SOUND SYSTEM) MOBILE PHONE ELECTRICAL CONNECTOR NCA NCA WIRE NCA WIRE ORG/ WIRE ORG/WHT WIRE PNK 1 2 3 4 5 6 7 8 9 10 11 12 MIC 1+ MIC 2+ SHIELD MIC + AUX SHIELD AUX L WIRE PNK WIRE RED WIRE RED/WHT RED WIRE RED/WHT WIRE RED/YEL WIRE RIGHT REAR DOOR SPEAKER (W/O SOUND SYSTEM) SOUND SYSTEMS VIO WIRE VL HL VL+ HL+ PNK WIRE VOICE CONTROL SYSTEM MICROPHONE W/ MOBILE PHONE PRE INSTALLATION W/O MOBILE PHONE PRE INSTALLATION WAKE-UP WHT WIRE WHT/YEL WIRE YEL WIRE

10 9 CAN B L CAN B H 30 31 11 12 SIG SIG (+) (+) 31 30 CAN B L CAN B H 6 3 2 PNK WIRE 6 7 CAN B L CAN B H BLK/GRY WIRE BLK/VIO WIRE BLK/WHT WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/BLK WIRE BRN/GRN WIRE BRN/RED WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM FL 31 31 FRONT DOME LAMP SWITCH FRONT SAM CONTROL UNIT FUSE 21 W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) GLOVE BOX LAMP) GLOVE BOX LAMP/ SWITCH GRN WIRE GRN/WHT WIRE GRY/BLU WIRE GRY/WHT WIRE INTERIOR LAMP AUTOMATIC FUNCTION SWITCH INTERIOR PROTECTION SWITCH LEFT FRONT INTERIOR LAMP LEFT FRONT READING LAMP SWITCH LEFT REAR READING LAMP LEFT SUN LEFT FRONT VISOR MIRROR LAMP MIRROR LAMP SWITCH PNK WIRE PNK/YEL WIRE REAR DOME LAMP REAR DOME LAMP, SWITCH REAR INTERIOR LAMP REAR SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT SIDE OF TRUNK/CARGO AREA) RED WIRE RED/BLK WIRE RED/VIO WIRE RELAY ENERGIZED RIGHT FRONT INTERIOR LAMP RIGHT FRONT MIRROR LAMP SWITCH RIGHT FRONT READING LAMP SWITCH RIGHT REAR READING LAMP RIGHT SUN VISOR MIRROR LAMP W/ AVANTGARDE, ELEGANCE W/ CLASSIC YEL WIRE

2 7 8 31 (+) (+) 30 31 CAN-B H CAN-B L BLK/GRY WIRE BLK/VIO WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/RED WIRE CAN C H CAN C L COMPUTER DATA LINES SYSTEM CONTROL UNIT) DRIVER SEAT CONTACTING STRIP FRONT PASSENGER SEAT CONTACTING FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 12 GRY/YEL WIRE HOT AT ALL TIMES LEFT FRONT BACKREST HEATED CUSHION (IF EQUIPPED) LEFT FRONT HEATED SEAT BUTTON LEFT FRONT SEAT SITTING SURFACE HEATED CUSHION (IF EQUIPPED) LIN 1 31 REAR SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT SIDE OF RED WIRE RED/GRN WIRE RIGHT FRONT BACKREST HEATED CUSHION (IF EQUIPPED) RIGHT FRONT HEATED SEAT BUTTON RIGHT FRONT SEAT SITTING SURFACE HEATED CUSHION (IF EQUIPPED) STRIP TRUNK/CARGO AREA) UPPER CONTROL PANEL

1 5 LIN 1 LWR 10 9 CAN B L CAN B H 2 3 CAN-C L CAN-C H 3 4 2 LIN 1 LWR 31 7 6 4 5 12 11 10 9 CAN C H CAN C L AUTOMATIC TRANSMISSION MODE BUTTON BLK/PNK WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/RED WIRE COMPUTER DATA LINES SYSTEM ELECTRONIC SELECTOR LEVER MODULE CONTROL MODULE (A/T) (UNDER CENTER CONSOLE) EXTERIOR LIGHTS SWITCH FRONT CIGARETTE LIGHTER W/ ASHTRAY ILLUMINATION (W/ SMOKER PACKAGE) FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FRONT VEHICLE INTERIOR POWER OUTLET (W/O SMOKER PACKAGE) FUSE 16 FUSE 18 FUSE 28 GRN WIRE GRY WIRE GRY/BLU WIRE GRY/YEL WIRE HOT AT ALL TIMES HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED INSTRUMENT CLUSTER INSTRUMENT ILLUMINATION, INSTRUMENT ILLUMINATION BRIGHTNESS CONTROL INSTRUMENT PANEL SWITCH GROUP LIN 1 NCA WIRE RED WIRE RED/BLU WIRE RED/GRY WIRE RED/YEL WIRE SHIFT GATE SYMBOL ILLUMINATION SWITCH ILLUMINATION WHT WIRE YEL WIRE

10 5 FLAT WIRE FLAT WIRE 2 1 CAN-B H CAN-B L 2 1 COMPUTER DATA LINES SYSTEM CAN B H CAN B L 8 7 FLAT WIRE FLAT WIRE AUTOMATIC AIR CONDITIONING CONTROL, OPERATING UNIT BRN WIRE BRN/RED WIRE COMPUTER DATA LINES SYSTEM CONTROL DRIVER TAILGATE CONTROL BUTTON (W/ TAILGATE FLAT WIRE FLAT WIRE FLAT WIRE FRONT ELECTRICAL PREFUSE BOX (AT RIGHT REAR OF ENGINE COMPT) FUSE 89 GRY/BLU WIRE HOT AT ALL TIMES LEFT CENTER AIR OUTLET SYMBOL ILLUMINATION LEFT FRONT DOOR CENTRAL LOCKING INTERIOR SWITCH LEFT FRONT DOOR CONTROL UNIT LEFT FRONT SIDE AIR OUTLET SYMBOL ILLUMINATION LEFT REAR DOOR CONTROL UNIT LEFT REAR POWER WINDOW SWITCH NCA WIRE REAR AIR OUTLET SYMBOL ILLUMINATION RED WIRE RIGHT CENTER AIR OUTLET SYMBOL ILLUMINATION RIGHT FRONT DOOR CENTRAL LOCKING INTERIOR SWITCH RIGHT FRONT DOOR CONTROL UNIT RIGHT FRONT SIDE AIR OUTLET SYMBOL ILLUMINATION RIGHT REAR DOOR CONTROL UNIT RIGHT REAR POWER WINDOW SWITCH TRUNK LID RELEASE BUTTON TRUNK LID RELEASE BUTTON (W/ TRUNK LID RELEASE) W/ AIR OUTLET SYMBOL ILLUMINATION

AUTOMATIC TRANSMISSION NEUTRAL POSITION SWITCH BRN WIRE BRN/RED WIRE CAN B H CAN B L CAN E H CAN E L CC CA CHASSIS CIRCUIT 87 RELAY COMPUTER DATA LINES SYSTEM DATA ELECTRIC STEERING LOCK CONTROL UNIT (TOP OF STEERING COLUMN) ELECTRONIC IGNITION SWITCH CONTROL UNIT ELECTRONIC STABILITY PROGRAM CONTROL UNIT FROM FUSE 101 (DIAGRAM 1 OF 5) FROM FUSE 111 (DIAGRAM 1 OF 5) FROM FUSE 16 (DIAGRAM 4 OF 5) FROM FUSE 32 (DIAGRAM 4 OF 5) FUSE FUSE 26 FUSE FUSE FUSE GRN WIRE GRN/WHT WIRE INSTRUMENT CLUSTER LEFT FRONT DOOR CONTROL UNIT RED WIRE RED/BRN WIRE RED/GRN WIRE RED/GRY WIRE RED/WHT WIRE RED/YEL WIRE RIGHT FRONT DOOR CONTROL UNIT W/ REAR BATTERY W/O REAR BATTERY WHT/RED WIRE

2 4 3 31 (+) (-) 31 30 CAN B L CAN B H BRN WIRE BRN/RED WIRE CAN B H CAN B L COMPUTER DATA LINES SYSTEM FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 12 GRN WIRE GRY WIRE GRY/YEL WIRE HOT AT ALL TIMES LIN 1 LIN 1 31 REAR SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT SIDE OF TRUNK/CARGO AREA) REAR WINDOW ROLLER SUN BLIND BUTTON REAR WINDOW ROLLER SUN BLIND MOTOR (IF EQUIPPED) (CENTER OF HAT SHELF) RED WIRE RED/GRN WIRE UPPER CONTROL PANEL CONTROL UNIT WHT WIRE YEL WIRE