Mercedes-Benz C-class W204/S204 (2006-2011) (under driver's seat) Wiring diagrams

2 1 CAN-B H CAN-B L AMBIENT LAMP RIGHT READING LAMP BLK WIRE BLK/VIO WIRE BLK/WHT WIRE BLU WIRE BRN WIRE BRN/GRN WIRE BRN/RED WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM DOOR EXIT, WARNING LAMP FLAT WIRE FUSE 89 GRN WIRE GRN/WHT WIRE GRY WIRE GRY/BLU WIRE HOT AT ALL TIMES INSIDE REARVIEW MIRROR LEFT FRONT DOOR CONTROL UNIT LEFT FRONT DOOR HANDLE ILLUMINATION (W/ INTERIOR LIGHTS PACKAGE) LEFT READING LAMP LEFT REAR DOOR CONTROL UNIT LEFT REAR DOOR HANDLE ILLUMINATION (W/ INTERIOR LIGHTS PACKAGE) LEFT TRUNK LAMP (MODEL CODE 204.2) LEFT TRUNK LID AMBIENT LAMP, WARNING LAMP MODEL CODE 204.0 PNK WIRE RED WIRE RIGHT FRONT DOOR CONTROL UNIT RIGHT FRONT DOOR HANDLE ILLUMINATION (W/ INTERIOR LIGHTS PACKAGE) RIGHT REAR DOOR CONTROL UNIT RIGHT REAR DOOR HANDLE ILLUMINATION (W/ INTERIOR LIGHTS PACKAGE) RIGHT TRUNK LAMP RIGHT TRUNK LID AMBIENT LAMP, WARNING LAMP TRUNK LID EXTERNAL OPERATION SWITCH VIO WIRE WHT WIRE YEL WIRE

41 54 10 37 23 50 11 CAN-E H CAN-E L 43 39 64 88 75 74 (+) SV IPM ACCEL SET/ ACCELERATOR PEDAL SENSOR (TOP OF ACCELERATOR BLK/GRN WIRE BLK/PNK WIRE BLU WIRE BLU/BRN WIRE BLU/WHT WIRE BRN WIRE BRN/WHT WIRE BRN/YEL WIRE CAN C H CAN C L CAN E H CAN E H CAN E L CAN E L CAN H H CAN H L SV_HIGH SV_LOW SH_HIGH SH_LOW 31 COMPUTER CAN H H CAN H L 31 DATA LINES 5 6 SYSTEM COMPUTER DATA LINES SYSTEM CRUISE CONTROL LEVER DATA DCM DCP DEC DECEL DISTRONIC CONTROL (IF EQUIPPED) DISTRONIC CONTROL UNIT DISTRONIC ELECTRIC CONTROLLER UNIT DISTRONIC RADAR SENSOR FRONT BUMPER LEFT INNER RADAR SENSOR FRONT BUMPER RIGHT INNER RADAR SENSOR (DISTRONIC PLUS) FRONT BUMPER RIGHT OUTER RADAR SENSOR (DISTRONIC PLUS) FUSE 13 FUSE 79 GRN WIRE GRN/WHT WIRE HOT AT ALL TIMES IND INSTRUMENT PANEL PARKTRONIC WARNING INDICATOR (W/ CITY ASSIST SYSTEM) ME-SFI (ME) CONTROL MODULE (TOP CENTER OF ENGINE) NCA WIRE OFF ORG/ WIRE OUTPUT SHAFT RPM SENSOR FULLY INTEGRATED TRANSMISSION CONTROL UNIT PEDAL ASSEMBLY) PNK/BLK WIRE PNK/BLU WIRE PNK/GRN WIRE PNK/GRY WIRE PNK/RED WIRE PNK/VIO WIRE RADAR SENSORS CONTROL UNIT REAR BUMPER FRONT BUMPER RIGHT OUTER LEFT OUTER RADAR SENSOR RADAR SENSOR REAR BUMPER LEFT INNER RADAR SENSOR (BLIND SPOT ASSIST) REAR BUMPER LEFT OUTER RADAR SENSOR (BLIND SPOT ASSIST) REAR BUMPER RIGHT INNER RADAR SENSOR REAR PARKTRONIC WARNING INDICATOR (W/ CITY ASSIST SYSTEM) RED WIRE RED/BLK WIRE RED/BLU WIRE RES+ RESUME SET- STEERING COLUMN MODULE CONTROL UNIT (TOP OF STEERING COLUMN) THROTTLE VALVE ACTUATOR (IN AIR INTAKE MANIFOLD) VIO WIRE VIO/GRN WIRE VIO/WHT WIRE VIO/YEL WIRE

1 2 3 4 5 6 HS(-) ML/K HS(+) ML+ HS(+) MK+ 1 2 CAN B L CAN B H 3 2 1 FLAT WIRE FLAT WIRE FLAT WIRE 31 HS(+) HS(-) HS(+) 6 7 8 FLAT WIRE FLAT WIRE FLAT WIRE BLK WIRE BLK/BLU WIRE BLK/RED WIRE BLK/YEL WIRE BLU WIRE BRN WIRE BRN/GRN WIRE BRN/RED WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM DRIVER SEAT BACKREST INCLI- NATION ADJUST- MENT MOTOR (IN DRIVER'S SEAT BACK) DRIVER SEAT CONTROL UNIT DRIVER SEAT FORE/AFT ADJUSTMENT MOTOR (UNDER DRIVER'S SEAT) DRIVER SEAT HEAD RESTRAINT ADJUSTMENT MOTOR DRIVER SEAT HEIGHT ADJUSTMENT MOTOR (UNDER DRIVER'S SEAT) DRIVER SEAT INCLINATION ADJUSTMENT MOTOR (UNDER DRIVER'S SEAT) GRY WIRE GRY/BLK WIRE GRY/GRN WIRE GRY/YEL WIRE HV_MOT+ NV_MOT- NV_MOT+ LEFT FRONT DOOR CONTROL UNIT LEFT FRONT SEAT ADJUSTMENT SWITCH GROUP (W/ FULLY ELECTRIC ADJUSTMENT) LV_MOT- LV_MOT+ HV_MOT- MLS H MLS V CAN-B L MLS CAN-B H RED WIRE RED/YEL WIRE STEERING COLUMN (IN/OUT) ADJUSTMENT MOTOR (IF EQUIPPED) STEERING COLUMN (UP/DOWN) ADJUSTMENT MOTOR (IF EQUIPPED) VIO WIRE VIO/WHT WIRE VIO/YEL WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE YEL/BLK WIRE YEL/BLU WIRE

ANT GPS SHIELD BLK WIRE BLK/YEL WIRE BLU/BLK WIRE BLU/BRN WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/PNK WIRE BLU/VIO WIRE BRN WIRE CAN D H CAN D L CENTER INSTRUMENT PANEL SPEAKER COMAND CONTROL UNIT COMPUTER DATA LINES SYSTEM DIAGNOSTIC CONNECTOR (UNDER LEFT SIDE OF DASH) ELECTRONICS (W/O CAN) EMERGENCY CALL SYSTEM ANTENNA (CENTER OF HAT SHELF) EMERGENCY CALL SYSTEM BUTTON EMERGENCY CALL SYSTEM CONTROL UNIT (CENTER FRONT OF TRUNK) FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 83 (LEFT SIDE OF TRUNK/CARGO AREA) FUSE 87 GLOBAL POSITIONING SYSTEM ANTENNA SPLITTER (RIGHT FRONT OF TRUNK) GPS GRY WIRE GRY/BLU WIRE GRY/WHT WIRE HOT AT ALL TIMES HOT W/ CIRCUIT INFO MB-INFO, BREAKDOWN ASSISTANCE BUTTON MIKR + MIKR - (-) KEEP ON MULTI-FUNCTION ANTENNA MUTE NCA WIRE OVERHEAD CONTROL PANEL CONTROL MODULE (W/ CAN) OVERHEAD CONTROL PANEL REAR SAM CONTROL UNIT W/ FUSE, RELAY MODULE RED/BLU WIRE SHIELD SIG ANT NOT SHIELD 1 2 SOS LED WS LED INFO LED SOS WS INFO CRASH SOUND SYSTEM AMPLIFIER CONTROL UNIT (LEFT SIDE OF TRUNK) SUPPLEMENTAL RESTRAINT SYSTEM CONTROL UNIT (UNDER FRONT OF CENTER CONSOLE) TEL TELEDIAGNOSIS VIO WIRE W/ NAVIGATION W/ SOUND SYSTEM W/O NAVIGATION W/O SOUND SYSTEM YEL WIRE YEL/BLK WIRE YEL/RED WIRE YEL/VIO WIRE

BATTERY SENSOR, ON BOARD ELECTRICAL SYSTEM BATTERY BLK WIRE BRN WIRE WHT WIRE

2 1 5 4 CAN B H CAN B L 30 31 BLK WIRE BRN WIRE BRN/RED WIRE COMPUTER DATA LINES SYSTEM FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE GRY WIRE HOT AT ALL TIMES LEFT FRONT DOOR CONTROL UNIT LEFT OUTSIDE MIRROR RED WIRE RED/GRY WIRE RED/WHT WIRE RIGHT FRONT DOOR CONTROL UNIT RIGHT OUTSIDE MIRROR WHT WIRE

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

1 2 CAN B L CAN B H 10 7 9 8 4 5 (+) SIG 31 SIG 33 33 2 1 5 4 CAN B H CAN B L 30 31 3 2 1 FLAT WIRE FLAT WIRE FLAT WIRE 31 SIG. SH(+) SH(-) 31 5 4 8 9 7 10 33 33 SIG 31 SIG (+) 6 7 8 FLAT WIRE FLAT WIRE FLAT WIRE 9 10 3 4 8 7 6 (+) 31 SH(-) SH(+) BLK WIRE BRN WIRE BRN/RED WIRE COMPUTER DATA LINES SYSTEM DRIVER-SIDE POWER WINDOW, OUTSIDE MIRROR ADJUSTMENT SWITCH GROUP FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE 30 31 FUSE 2 HORI MOTOR HOT AT ALL TIMES IN/OUT MOTOR (IF EQUI- PPED) LEFT FRONT DOOR CONTROL UNIT LEFT FRONT SEAT ADJUSTMENT SWITCH GROUP LEFT OUTSIDE MIRROR LEFT OUTSIDE MIRROR ADJUSTMENT SWITCH MIRROR HEATER OUTSIDE MIRROR ADJUSTMENT SWITCH OUTSIDE MIRROR FOLD-IN/ FOLD-OUT SWITCH (IF EQUIPPED) RED/GRY WIRE RED/WHT WIRE RIGHT EXTERIOR MIRROR RIGHT FRONT DOOR CONTROL UNIT RIGHT OUTSIDE MIRROR RIGHT OUTSIDE MIRROR ADJUSTMENT SWITCH VERT MOTOR

1 2 3 4 5 6 7 8 LIN 2 1 2 3 4 5 6 IRS OFF IRS LED 30 32 31 29 28 27 SOS INFO WS INFO LED WS LED SOS LED 30 S GB 31 ASS LED ASS OFF 31 FL 31 HS 1 HS(+) HS 2 MOTOR - MOTOR + 8 7 6 5 4 3 2 1 SOS LED WS LED INFO LED AUTOMATIC DIMMING MIRROR BLK WIRE BLK/GRY WIRE BLU WIRE BLU/BLK WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/PNK WIRE BRN WIRE BRN/BLK WIRE BRN/GRY WIRE BRN/RED WIRE CAN B L CAN B H CAN B L CAN B H LIN 2 30 31 COMPASS DISPLAY BUTTON (USA) COMPASS MODULE W/ DISPLAY (USA) COMPUTER DATA LINES SYSTEM EMERGENCY CALL SYSTEM CONTROL UNIT FRONT DOME LAMP SWITCH FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 17 FUSE 46 GARAGE DOOR OPENER BUTTON 1 GARAGE DOOR OPENER BUTTON 2 GARAGE DOOR OPENER BUTTON 3 GARAGE DOOR OPENER INDICATOR LAMP GRN WIRE GRY WIRE GRY/BLU WIRE GRY/RED WIRE GRY/YEL WIRE HOT AT ALL TIMES INSIDE REARVIEW MIRROR INTERIOR LAMP AUTOMATIC FUNCTION SWITCH INTERIOR PROTECTION RECEIVER INTERIOR PROTECTION SWITCH (W/ TOW-WAY PROTECTION, INTERIOR PROTECTION) INTERIOR PROTECTION, TOW-WAY PROTECTION CONTROL UNIT (IF EQUIPPED) INTERIOR TEMPERATURE SENSOR W/ INTEGRATED FAN LEFT FRONT INTERIOR LAMP LEFT FRONT READING LAMP SWITCH LEFT INTERIOR PROTECTION TRANSMITTER LEFT READING LAMP GARAGE DOOR OPENER LEFT REAR WINDOW GLASS BREAKAGE SENSOR (W/ MODEL CODE 204.2) LIN 2 NCA WIRE OVERHEAD CONTROL PANEL CONTROL MODULE PNK WIRE POWER TOPS SYSTEM REAR DOME LAMP, SWITCH REAR SAM CONTROL UNIT W/ FUSE, RELAY MODULE REAR WINDOW GLASS BREAKAGE SENSOR (W/ MODEL CODE 204.2) RED WIRE RED/BLK WIRE RED/BLU WIRE RED/VIO WIRE RIGHT AMBIENT READING LAMP LAMP RIGHT FRONT INTERIOR LAMP RIGHT FRONT READING LAMP SWITCH RIGHT INTERIOR PROTECTION TRANSMITTER RIGHT REAR WINDOW GLASS BREAKAGE SENSOR (W/ MODEL CODE 204.2) TILTING/SLIDING ROOF SWITCH TOWING SENSOR BUTTON (W/ TOW-WAY PROTECTION, INTERIOR PROTECTION) USA VIO WIRE W/ MODEL CODE 204.2 WHT WIRE WS INFO SOS 31 YEL WIRE YEL/RED WIRE YEL/VIO WIRE

BACKUP CAMERA BAS BLK WIRE BRN WIRE BRN/RED WIRE CAN-B H CAN-B L COMAND CONTROL UNIT COMPUTER DATA LINES SYSTEM NCA WIRE RED/BLU WIRE REVERSE CAMERA CONTROL MODULE SHIELD SIG SIG SHIELD UB GND YEL WIRE