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

1 2 3 4 5 6 31 CAN G H CAN G L 15 1 2 3 4 5 6 31 CAN G H CAN G L 15 31 31 3 6 LED LED 4 5 2 1 31 30 CAN-B H CAN-B L BLK WIRE BLU RED/ WIRE BRN WIRE BRN/RED WIRE CAN-B H CAN-B L COMPUTER DATA LINES SYSTEM HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED FUSE 41 LED 31 NCA WIRE PNK WIRE PNK/WHT WIRE RED/BLU WIRE RED/GRY WIRE RED/WHT WIRE RIGHT BLIND 3 2 1 SPOT ASSIST READINESS, WARRING INDICATOR (IF EQUIPPED) RIGHT OUTSIDE MIRROR WHT PNK/ WIRE

10 9 CAN B L CAN B H 30 31 11 SIG SIG (+) 31 30 CAN B L CAN B H 6 3 2 PNK WIRE BLK/GRY WIRE BLK/VIO 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 17 W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 21 GLOVE BOX LAMP) GRN WIRE GRN/WHT WIRE GRY/BLU WIRE GRY/WHT WIRE HOT AT ALL TIMES INTERIOR LAMP AUTOMATIC FUNCTION SWITCH INTERIOR PROTECTION SWITCH LEFT FRONT INTERIOR LAMP LEFT FRONT MIRROR LAMP SWITCH LEFT FRONT READING LAMP SWITCH LEFT REAR LEFT REAR READING LAMP LEFT SUN VISOR MIRROR LAMP PNK 8 9 10 WIRE PNK/YEL WIRE READING SWITCH REAR DOME LAMP REAR DOME LAMP, SWITCH REAR INTERIOR LAMP REAR SAM CONTROL UNIT W/ FUSE, RELAY MODULE (RIGHT SIDE OF TRUNK/CARGO AREA) RED WIRE RED/BLK WIRE RED/BLU 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 REAR READING SWITCH RIGHT SUN VISOR MIRROR LAMP W/ AVANTGARDE, ELEGANCE W/ CLASSIC W/O CAN W/ CAN YEL 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

3 2 CAN-C H CAN-C L 30 31 CAN-B H CAN-B L 4 3 2 1 30 31 CAN E H CAN E L 5 7 LWR BLK/BLU WIRE BLK/PNK WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/BLK WIRE BRN/RED WIRE COMBINATION SWITCH COMPT) COMPUTER DATA LINES SYSTEM EXTERIOR LIGHTS SWITCH FRONT ELECTRICAL PREFUSE BOX (AT RIGHT REAR OF ENGINE COMPT) FRONT FOG LAMP BUTTON FRONT FOG LAMP IND LAMP FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE FUSE 13 FUSE 29 FUSE 30 FUSE 5 GRN WIRE GRN/BLK WIRE GRN/BLU WIRE GRN/WHT WIRE GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/BRN WIRE GRY/PNK WIRE HEADLAMP FLASHER/ HIGH BEAM SWITCH HEADLAMP RANGE ADJUSTMENT ACTUATOR MOTOR HEADLAMP RANGE CONTROLLER (W/ HEADLAMP RANGE ADJUSTMENT FOR HALOGEN HEADLAMPS) HIGH BEAM IND LAMP HIGH BEAM LOW BEAM HEADLAMP RANGE ADJUSTMENT ACTUATOR MOTOR HOT AT ALL TIMES HOT W/ CIRCUIT 15 RELAY ENERGIZED HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED INSTRUMENT CLUSTER LEFT DAYTIME RUNNING LAMPS HEADLAMP (IF EQUIPPED) LEFT HIGH BEAM FOG LAMP (IF EQUI- PPED) LEFT REAR LAMP UNIT LEFT RIGHT FOG FRONT LAMP UNIT LAMP (IF EQUI- PPED) LOW BEAM LOW BEAM IND LAMP LOW BEAM SWITCH LWR LWR 31 MODULE CONTROL UNIT PARKING BRAKE INDICATOR SWITCH (ON PARKING BRAKE SUPPORT BRACKET) PNK/RED WIRE REAR FOG LAMP REAR FOG LAMP BUTTON REAR FOG LAMP IND LAMP 12 13 17 18 CAN E L CAN E H CAN B L CAN B H RED WIRE RED/BLU WIRE RED/WHT WIRE RIGHT DAYTIME RUNNING LAMPS HEADLAMP (IF EQUIPPED) RIGHT FRONT LAMP UNIT RIGHT REAR LAMP UNIT SIG SWITCH ILLUMINATION W/ ECO START/STOP FUNCTION W/ HEADLAMP RANGE ADJUSTMENT FOR HALOGEN HEADLAMPS W/O ECO START/STOP FUNCTION WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

1 2 4 3 CAN E L CAN E H 30 31 9 10 CAN-B H CAN-B L BLK WIRE BLK/WHT WIRE BRN WIRE BRN/RED WIRE CENTER HORNS BUTTON COMPUTER DATA LINES SYSTEM FANFARE HORN RELAY FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE FUSE 13 GRN WIRE GRN/WHT WIRE HOT AT ALL TIMES HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED LEFT FANFARE HORN (BEHIND LEFT SIDE OF FRONT BUMPER) LEFT FANFARE HORN SYSTEM BUTTON RED/BLU WIRE RELAY RIGHT FANFARE HORN (BEHIND RIGHT SIDE OF FRONT BUMPER) RIGHT FANFARE HORN SYSTEM BUTTON STEERING WHEEL ELECTRONICS

10 9 CAN B L CAN B H 3 2 LWR 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 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 28 FUSE 5 GRN WIRE GRY WIRE GRY/BLU WIRE GRY/BRN WIRE HOT AT ALL TIMES HOT W/ CIRCUIT 15 RELAY ENERGIZED HOT W/ ENGINE CIRCUIT 87 RELAY ENERGIZED INSTRUMENT CLUSTER INSTRUMENT ILLUMINATION, INSTRUMENT ILLUMINATION BRIGHTNESS CONTROL LWR NCA WIRE PNK/RED WIRE RED WIRE RED/BLU WIRE RED/YEL WIRE SHIFT GATE SYMBOL ILLUMINATION SWITCH ILLUMINATION W/O XENON LAMPS WHT WIRE YEL WIRE

1 2 3 4 5 6 30 RLS SIG SIG SIG SIG GND 1 2 3 4 5 6 7 8 31 SOS INFO WS 1 2 3 4 5 6 7 8 LIN 2 1 2 3 4 5 6 IRS OFF IRS LED 27 28 29 31 32 30 SOS LED WS LED INFO LED WS INFO SOS 31 ASS LED ASS OFF 31 FL AUTOMATIC AIR CONDITIONING CONTROL, OPERATING UNIT BLK WIRE BLK/GRY WIRE BLU WIRE BLU/BLK WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/PNK WIRE BLU/WHT WIRE BRN WIRE BRN/BLK WIRE BRN/GRY WIRE BRN/WHT WIRE FRONT DOME LAMP SWITCH FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 12 FUSE 152 GASOLINE GND NTC (+) GRN WIRE GRN/WHT WIRE GRY WIRE GRY/BLU WIRE GRY/RED WIRE GRY/YEL WIRE HOT AT ALL TIMES FRONT ELECTRICAL PREFUSE BOX HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED INFO LED WS LED SOS LED INTERIOR LAMP AUTOMATIC FUNCTION SWITCH INTERIOR PROTECTION RECEIVER INTERIOR PROTECTION SWITCH (W/ TOW-AWAY PROTECTION, INTERIOR PROTECTION) INTERIOR TEMPERATURE SENSOR W/ INTEGRATED FAN LEFT FRONT READING LAMP SWITCH LEFT INTERIOR PROTECTION TRANSMITTER LIN 2 NCA WIRE NTC- PNK 17 18 WIRE PNK WIRE POWER TOPS SYSTEM REAR DOME LAMP, SWITCH RED WIRE RED/BLK WIRE RED/BLU WIRE RED/BRN WIRE RED/GRN WIRE RED/VIO WIRE RED/WHT WIRE RIGHT FRONT READING LAMP SWITCH RIGHT INTERIOR PROTECTION TRANSMITTER RIGHT LEFT FRONT FRONT INTERIOR INTERIOR LAMP LAMP SIG LIN 2 TOWING SENSOR BUTTON (W/ TOW-AWAY PROTECTION, INTERIOR PROTECTION) WHT WIRE YEL WIRE YEL/RED WIRE YEL/VIO WIRE

1 2 3 4 5 6 7 8 LIN 2 1 2 3 4 5 6 IRS OFF IRS LED 2 3 4 5 6 7 8 SOS INFO WS 27 28 29 31 32 30 SOS LED WS LED INFO LED WS INFO SOS 31 ASS LED ASS OFF 31 FL BLK WIRE BLK/GRY WIRE BLU WIRE BLU/BLK WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/PNK WIRE BRN WIRE BRN/GRY WIRE BRN/RED WIRE CAN B L CAN B H LIN 2 COMPUTER DATA LINES SYSTEM EMERGENCY CALL SYSTEM CONTROL UNIT (IF EQUIPPED) (CENTER FRONT OF TRUNK) FRONT DOME LAMP SWITCH FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 17 GRN WIRE GRY WIRE GRY/BLU WIRE GRY/RED WIRE GRY/YEL WIRE HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED HS 2 HS(+) INFO LED WS LED SOS LED INTERIOR LAMP AUTOMATIC FUNCTION SWITCH INTERIOR PROTECTION SWITCH (W/ TOW-AWAY PROTECTION, INTERIOR PROTECTION) INTERIOR TEMPERATURE SENSOR W/ INTEGRATED FAN LEFT FRONT INTERIOR LAMP LEFT FRONT READING LAMP SWITCH LIN 2 MOTOR OVERHEAD CONTROL PANEL CONTROL UNIT (CENTER REAR OF TRUNK) PNK 14 15 WIRE PNK WIRE POWER TOPS SYSTEM REAR DOME LAMP, SWITCH RED WIRE RED/BLK WIRE RED/BLU WIRE RED/VIO WIRE RIGHT FRONT INTERIOR LAMP RIGHT FRONT READING LAMP SWITCH TILTING/ SLIDING ROOF SWITCH TOWING SENSOR BUTTON (W/ TOW-AWAY PROTECTION, INTERIOR PROTECTION) VIO WIRE WHT WIRE YEL WIRE YEL/RED WIRE YEL/VIO WIRE

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

1 2 COMPUTER DATA LINES SYSTEM CAN-B L CAN-B H 10 5 7 12 13 3 6 11 4 31 CAN-B L CAN-B H HS(-) HS(+) MLS H MLS HS(+) MLS V 2 1 CAN-E H CAN-E L BLU WIRE BRN WIRE BRN/RED WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM CRUISE RESUME CONTROL FROM LEVER MEMORY SWITCH DRIVER SEAT CONTROL UNIT (UNDER DRIVER'S SEAT) GRN WIRE GRN/WHT WIRE GRY/BLK WIRE GRY/GRN WIRE GRY/YEL WIRE LEFT FRONT SEAT ADJUSTMENT SWITCH GROUP (W/ FULLY ELECTRIC SEAT ADJUSTMENT) RED/BLU WIRE RED/YEL WIRE STEERING COLUMN ADJUSTMENT SWITCH YEL/BLK WIRE YEL/BLU WIRE