Mercedes-Benz C-class W204/S204/С204 facelift (2011-2015) vio/wht Wiring diagrams

1.8L TURBO 3.5L 2.1L TURBO DIESEL 2 3 46 26 43 18 REG LUES 9 10 CAN-B H CAN-B L BLK/BLU WIRE BLK/RED WIRE BRN WIRE BRN/RED WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM COOLANT CIRCULATION PUMP (W/ THERMOTRONIC) (RIGHT SIDE OF ENGINE COMPT) COOLANT TEMPERATURE SENSOR ENGINE CONTROLS SYSTEM FRONT ELECTRICAL PREFUSE BOX (AT RIGHT REAR OF ENGINE COMPT) FRONT SAM CONTROL MODULE UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 151 GRN/BLU WIRE GRN/RED WIRE HOT AT ALL TIMES HOT W/ ENGINE CIRCUIT 87 RELAY ENERGIZED FUSE 22 KHD MRI PURGE CONTROL VALVE (LEFT FRONT ENGINE COMPT) RED WIRE RED/BLK WIRE RED/YEL WIRE REFRIGERANT PRESSURE SENSOR (AT BOTTOM LEFT SIDE OF RADIATOR CONDENSER) SIG SOLID STATE TMOT VIO/WHT WIRE WHT WIRE

1 2 3 4 VIDEO N LVDS N VIDEO P LVDS P 2 3 1 5 6 CAN S H CAN S L 31 31 31 PNK WIRE 4 1 3 2 15 31 CAN S L CAN S H BLK WIRE BLU WIRE BRN WIRE CAN E H CAN E L CAN H H CAN H H CAN H L CAN H H CAN H L BLS H BLS_M BLS_L CAN H L CAN S H CAN S L 31 PNK WIRE CAN-G H CAN-G L CAN-S H CAN-S L COMPUTER DATA LINES SYSTEM DISTRONIC CONTROL UNIT DISTRONIC ELECTRIC CONTROLLER UNIT (CENTER OF FRONT GRILLE) DISTRONIC RADAR SENSOR ELECTRONIC STABILITY PROGRAM CONTROL UNIT (LEFT FRONT OF ENGINE COMPT) FUSE GRN WIRE GRN/WHT WIRE HOT AT ALL TIMES HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED LEFT FRONT BUMPER DISTRONIC SENSOR (DTR) LEFT REAR BUMPER INTELLIGENT RADAR SENSOR (W/ BLIND SPOT ASSIST), LEFT REAR BUMPER RADAR SENSOR (BEHIND LEFT END OF REAR BUMPER) MULTI-FUNCTION CAMERA ORG/ WIRE PNK WIRE PNK/BLU WIRE PNK/GRN WIRE PNK/WHT WIRE RED/BLU WIRE RIGHT FRONT BUMPER DISTRONIC SENSOR (DTR) RIGHT REAR BUMPER INTELLIGENT RADAR SENSOR (W/ BLIND SPOT ASSIST), RIGHT REAR BUMPER RADAR SENSOR (BEHIND RIGHT REAR END OF REAR BUMPER) VIDEO, RADAR SENSOR SYSTEM CONTROL UNIT VIO WIRE VIO/WHT WIRE

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

1 2 CAN-H H CAN-H L 13 12 CAN-E L CAN-E H 18 19 CAN-H H CAN-H L 2 3 CAN-S H CAN-S L PNK WIRE 3 2 CAN-G L CAN-G H 3 2 CAN-H H CAN-H L 3 4 PNK WIRE 3 6 CAN-H H CAN-H L 74 75 CAN-E L CAN-E H BRN WIRE BRN/RED WIRE CAN B H CAN B L CAN E H CAN E L CAN H H CAN H L DISTRONIC ELECTRIC CONTROLLER UNIT (IF EQUIPPED) (BEHIND CENTER OF FRONT GRILLE) ELECTRONIC IGNITION SWITCH CONTROL UNIT ELECTRONIC STABILITY PROGRAM CONTROL UNIT (LEFT FRONT OF ENGINE COMPT) ELECTRONIC STABILITY PROGRAM CONTROL UNIT (W/ ESP, W/O ADAPTIVE DAMPING SYSTEM) GRN WIRE GRN/WHT WIRE INSTRUMENT CLUSTER (C-CLASS) LEFT REAR BUMPER INTELLIGENT RADAR SENSOR PNK 3 2 CAN-G L CAN-G H WIRE PNK WIRE PNK/WHT WIRE RIGHT REAR BUMPER INTELLIGENT RADAR SENSOR RIGHT REAR BUMPER RADAR SENSOR (BEHIND RIGHT REAR END OF REAR BUMPER) STEERING COLUMN MODULE CONTROL SUPPLEMENTAL RESTRAINT SYSTEM CONTROL UNIT (UNDER FRONT OF CENTER CONSOLE) UNIT (C-CLASS) (TOP OF STEERING COLUMN) VEHICLE DYNAMICS CAN VOLTAGE DISTRIBUTOR ELECTRICAL CONNECTOR VIO WIRE VIO/WHT WIRE YAW RATE, LATERAL, LONGITUDINAL ACCELERATION SENSOR (UNDER DRIVER'S SEAT)

1 2 3 4 5 6 HS(-) ML/K HS(+) ML+ HS(+) MK+ 1 2 CAN B L CAN B H 31 SIG MOT+ MOT- BLK WIRE BLK/BLU WIRE BLK/RED WIRE BLK/YEL WIRE BLU WIRE BLU/RED WIRE BRN WIRE BRN/GRN WIRE BRN/RED WIRE BRN/YEL WIRE CAN B H CAN B L COMPUTER DATA LINES SYSTEM CONTROL UNIT (IN FRONT PASSENGER FRONT SEAT BACK) FRONT PASSE- NGER SEAT FORE/AFT ADJUSTMENT MOTOR (UNDER FRONT PASSENGER'S SEAT) FRONT PASSE- NGER SEAT HEIGHT ADJUSTMENT MOTOR (UNDER FRONT PASSENGER'S SEAT) FRONT PASSENGER SEAT CONTROL UNIT (UNDER FRONT PASSENGER'S SEAT) FRONT PASSENGER SEAT EASY ENTRY SYSTEM LIMIT SWITCH (IF EQUIPPED) FRONT PASSENGER SEAT LUMBAR SUPPORT FRONT PASSENGER SEAT LUMBAR SUPPORT ADJUSTMENT FRONT PASSENGER SEAT LUMBAR SUPPORT ADJUSTMENT SWITCH GRN WIRE GRN/BLK WIRE GRN/BLU WIRE GRN/VIO WIRE GRY WIRE HV_MOT+ NV_MOT- NV_MOT+ LV_MOT- LV_MOT+ HV_MOT- RED WIRE RED/BLU WIRE RED/GRN WIRE RED/YEL WIRE RIGHT FRONT SEAT ADJUSTMENT SWITCH GROUP (W/ FULLY ELECTRIC SEAT ADJUSTMENT) VIO WIRE VIO/WHT WIRE VIO/YEL WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE YEL WIRE

13 14 15 16 17 18 19 20 SIG SIG HS 1 +12 V 31 2 3 SIG SIG 4 5 SIG SIG 6 1 HS GND 30 RLS BLK WIRE BLU WIRE BLU/WHT WIRE BRN WIRE CAN B L COMPUTER DATA LINES SYSTEM FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) GRN WIRE GRY WIRE HALL SENSOR 1 HALL SENSOR 2 HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED FUSE 17 OVERHEAD CONTROL PANEL ELECTRONICS (C-CLASS: CENTER REAR OF TRUNK) PANORAMIC SLIDING ROOF CONTROL MODULE (LEFT FRONT OF ROOF) PANORAMIC SLIDING ROOF CONTROL UNIT PANORAMIC SLIDING ROOF HALL SENSOR 1 PANORAMIC SLIDING ROOF HALL SENSOR 2 PANORAMIC SLIDING ROOF MOTOR PNK WIRE PNK/GRN WIRE RED WIRE RED/BLU WIRE RED/WHT WIRE VIO WIRE VIO/WHT WIRE YEL WIRE YEL/RED WIRE

1 2 CAN-B H CAN-B L 2 HS AUTOMATIC AIR CONDITIONING CONTROL, OPERATING UNIT BLK WIRE BRN WIRE BRN/RED WIRE CAN B L CAN B H COMPUTER DATA LINES SYSTEM COUPE FUSE HEATED REAR WINDOW RELAY HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED REAR SAM CONTROL UNIT W/ FUSE, RELAY MODULE (RIGHT SIDE OF TRUNK/CARGO AREA) REAR WINDOW ANTENNA AMPLIFIER 1 (IF EQUIPPED) (CENTER REAR OF ROOF) REAR WINDOW HEATER REAR WINDOW HEATER BUTTON REAR WINDOW INTERFERENCE SUPPRESSION CAPACITOR 1 REAR WINDOW INTERFERENCE SUPPRESSION CAPACITOR 1 (SEDAN) REAR WINDOW INTERFERENCE SUPPRESSION CAPACITOR 2 RED WIRE VIO/WHT WIRE W/O ECO START/ STOP FUNCTION W/ ECO START/ STOP FUNCTION

BASS BASS SPEAKER (C-CLASS) BLU WIRE BLU/BLK WIRE BLU/BRN WIRE BLU/VIO WIRE BRN WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/ORG WIRE BRN/PNK WIRE BRN/VIO WIRE BRN/WHT WIRE BRN/YEL WIRE CENTER INSTRUMENT PANEL SPEAKER COUPE EMERGENCY CALL SYSTEM CONTROL UNIT (IF EQUIPPED) (CENTER FRONT TRUNK/CARGO AREA) FUSE GRN WIRE GRY WIRE HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED LCT LEFT FRONT DOOR SPEAKER LEFT REAR BASS LEFT REAR DOOR SPEAKER LEFT REAR SURROUND LOUDSPEAKER LEFT REAR TWEETER MOST DATA BUS CIRCUIT NCA WIRE ON MUTE ORG/ WIRE PNK EXCEPT COUPE WIRE PNK PNK WIRE PNK WIRE REAR BASS SPEAKER REAR BASS SPEAKER AMPLIFIER (GLK-CLASS) (LEFT SIDE OF TRUNK/ CARGO AREA) REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (RIGHT SIDE OF TRUNK/CARGO AREA) RED/BLU WIRE RED/YEL WIRE RIGHT FRONT DOOR SPEAKER RIGHT REAR BASS SPEAKER RIGHT REAR DOOR SPEAKER RIGHT REAR SURROUND LOUDSPEAKER RIGHT REAR TWEETER SOUND SYSTEM AMPLIFIER CONTROL UNIT (LEFT SIDE OF TRUNK/CARGO AREA) SPEAKER TWEETER VIO WIRE VIO/BRN WIRE VIO/RED WIRE VIO/WHT WIRE WAKE-UP WHT WIRE YEL WIRE YEL/BLK WIRE

1.8L TURBO 2.1L TURBO DIESEL 3 4 CAN B H CAN B L 3.5L 41 40 CAN C H CAN C L BATTERY SENSOR (C-CLASS: ON BATTERY) (GLK CLASS: ON BATTERY NEGATIVE POST) BLK WIRE BLU WIRE BLU/RED WIRE BLU/WHT WIRE BRN WIRE BRN/RED WIRE CAN C H CAN C H CAN C L CAN C L CHARGING CIRCUIT COMPUTER DATA LINES SYSTEM D- D+ ELECTRONIC IGNITION SWITCH CONTROL UNIT ELECTRONIC SELECTOR LEVER MODULE CONTROL MODULE (A/T) (UNDER CENTER CONSOLE) ELECTRONIC TRANSMISSION CONTROL UNIT FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 25 FUSE 7 HOT W/ CIRCUIT 15 RELAY ENERGIZED ON-BOARD ELECTRICAL SYSTEM BATTERY POWER DISTRIBUTION SYSTEM RED WIRE RED/BLU WIRE RELAY STARTER STARTER CIRCUIT STR+ VIO WIRE VIO/WHT WIRE

BLK WIRE BLK/BLU WIRE BLK/RED WIRE BLU/BLK WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/PNK WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE BRN/BLU WIRE BRN/GRY WIRE BRN/ORG WIRE BRN/RED WIRE BRN/VIO WIRE BRN/WHT WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM DCM DOWNSTREAM OF CATALYTIC CONVERTER (UNDER RIGHT FRONT OF VEHICLE, IN EXHAUST) ENGINE OIL PUMP VALVE EV 1 FRONT SAM CONTROL MODULE W/ FUSE, FUSE FUSE RELAY MODULE (LEFT REAR OF ENGINE COMPT) GRN WIRE GRN/BRN WIRE GRN/GRY WIRE GRN/VIO WIRE GRN/WHT WIRE GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/GRN WIRE GRY/PNK WIRE GRY/VIO WIRE HOT AT ALL TIMES HOT W/ CHASSIS CIRCUIT 87 RELAY ENERGIZED HOT W/ CIRCUIT INTAKE MANIFOLD RESONANCE FLAP SWITCH OVER VALVE INTAKE MANIFOLD SELECTOR DRUM SWITCH OVER VALVE IPM LEFT NOX SENSOR LSHK ME-SFI (ME) CONTROL MODULE (LEFT SIDE OF ENGINE) NCA WIRE NWSA 1 NWSE 2 DCM ORG/ WIRE PNK COMPUTER DATA LINES SYSTEM WIRE PNK WIRE PNK/BLU WIRE PNK/GRN WIRE PNK/RED WIRE PNK/WHT WIRE RED/BLU WIRE RED/GRN WIRE RED/GRY WIRE RED/WHT WIRE RELAY ENERGIZED RIGHT NOX SENSOR RIGHT NOX SENSOR CONTROL UNIT (W/ STRATIFIED CHARGE) VIO WIRE VIO/BLU WIRE VIO/BRN WIRE VIO/WHT WIRE WHT/BLK WIRE WHT/BRN WIRE WHT/GRN WIRE WHT/GRY WIRE WHT/VIO WIRE WHT/YEL WIRE YEL/BRN WIRE YEL/GRY WIRE YEL/VIO WIRE ZUE 1 ZUE 4 ZUE 3 ZUE 5 ZUE 6 ZEU 2