Mercedes-Benz C-class W204/S204/С204 facelift (2011-2015) (under right front seat) Wiring diagrams

1 2 3 4 (+) (-) 31 (+) 1 2 3 4 5 6 7 8 9 FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE 1 2 5 4 CAN B L CAN B H 10 11 12 FLAT WIRE FLAT WIRE 18 28 ZV SIG 4 30 31 3 SIG CAN B H CAN B L SIG 6 7 ZV-MOT ZV-MOT 7 6 ZV-MOT ZV-MOT BLU WIRE BRN WIRE BRN/GRY WIRE BRN/PNK WIRE BRN/RED WIRE CENTRAL MOTOR LOCKING COMPUTER DATA LINES SYSTEM FLAT WIRE FLAT WIRE FLAT WIRE GRN WIRE GRN/BLU WIRE GRN/YEL WIRE GRY WIRE GRY/BLK WIRE GRY/BLU WIRE LEFT FRONT DOOR CENTRAL LOCKING INTERIOR SWITCH LEFT FRONT DOOR DOOR HANDLE ILLUMINATION LEFT FRONT DOOR EXIT, WARNING LAMP LEFT FRONT DOOR HANDLE RECESS ILLUMINATION (W/ INTERIOR LIGHTS PACKAGE) LEFT REAR DOOR CONTROL UNIT (REAR OF LEFT REAR DOOR) LEFT REAR DOOR DOOR HANDLE ILLUMINATION (W/ INTERIOR LIGHTS PACKAGE) LEFT REAR DOOR EXIT, WARNING LAMP (W/ INTERIOR LIGHTS PACKAGE) LEFT REAR DOOR HANDLE RECESS ILLUMINATION (W/ INTERIOR LIGHTS PACKAGE) LEFT REAR DOOR LOCK REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (RIGHT SIDE OF TRUNK/ CARGO AREA) RED WIRE RED/GRY WIRE RED/WHT WIRE RIGHT REAR DOOR CONTROL UNIT (REAR OF RIGHT REAR DOOR) RIGHT REAR DOOR HANDLE RECESS ILLUMINATION (W/ INTERIOR LIGHTS PACKAGE) RIGHT REAR DOOR LOCK ROTARY TUMBLER SWITCH TAILGATE CONTROL BUTTON (W/ AUTOMATIC TAILGATE, KEYLESS GO) TANK CAP CENTRAL LOCKING MOTOR (RIGHT SIDE OF TRUNK/CARGO AREA) TRUNK LID RELEASE/DRIVER TAILGATE CONTROL BUTTON W/ INTERIOR LIGHTS PACKAGE W/ KEYLESS W/O KEYLESS W/O KEYLESS W/ KEYLESS

BLK WIRE BLK/WHT WIRE BRN WIRE CAN A H CAN A L COMAND CONTROL UNIT COMPUTER DATA LINES SYSTEM DVD PLAYER FUSE 86 W/ FUSE, RELAY MODULE (RIGHT SIDE OF TRUNK/CARGO AREA) HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED LEFT REAR DISPLAY NCA WIRE REAR SAM CONTROL UNIT RED/GRN WIRE RIGHT REAR DISPLAY SHIELD SHIELD AUDIO-R AUDIO GND SHIELD AUDIO-R AUDIO GND VIDEO-GND SIG SIG SHIELD AUDIO-L SIG SHIELD AUDIO-L VIDEO-Y VIDEO-C AUDIO SHIELD AUDIO L SHIELD VIDEO-GND AUDIO-R AUDIO GND SIG YEL WIRE

4 5 2 3 30 31 CAN E L CAN E H BRN WIRE COMPUTER DATA LINES SYSTEM FUSE GRN WIRE GRN/WHT WIRE HOT AT ALL TIMES REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (RIGHT SIDE OF TRUNK/CARGO AREA) RED/VIO WIRE RED/WHT WIRE

2 1 4 3 10 9 5 31 SIG SH (+) SH (-) 31 (+) LED 31 2 1 5 4 CAN B H CAN B L 30 31 4 5 3 6 33 33 LED LED 6 3 LED LED 9 10 3 4 (+) 31 SH (-) SH (+) BLK WIRE BRN WIRE BRN/PNK WIRE BRN/RED WIRE COMPUTER DATA LINES SYSTEM DRIVER-SIDE POWER WINDOW, OUTSIDE MIRROR ADJUSTMENT SWITCH GROUP FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR ENGINE COMPT) FUSE FUSE 41 HOT AT ALL TIMES HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED LED 31 LEFT BLIND SPOT ASSIST READINESS, WARNING INDICATOR LEFT FRONT POWER WINDOW SWITCH LEFT OUTSIDE MIRROR LEFT OUTSIDE MIRROR ADJUSTMENT SWITCH LEFT OUTSIDE MIRROR TURN SIGNAL LAMP LEFT REAR POWER WINDOW SWITCH MIRROR HEATER NCA WIRE OUTSIDE MIRROR ADJUSTMENT SWITCH OUTSIDE MIRROR FOLD-IN/ FOLD-OUT SWITCH PNK WIRE REAR SAM CONTROL UNIT W/ FUSE, RELAY MODULE (RIGHT SIDE OF REAR SIDE WINDOW CHILD SAFETY LOCK SWITCH RED/BLK WIRE RED/GRY WIRE RED/WHT WIRE RIGHT FRONT POWER WINDOW SWITCH RIGHT OUTSIDE MIRROR RIGHT OUTSIDE MIRROR ADJUSTMENT SWITCH RIGHT OUTSIDE MIRROR TURN SIGNAL LAMP RIGHT REAR POWER WINDOW SWITCH TRUNK/CARGO AREA)

2 7 8 31 (+) (+) 30 31 CAN-B H CAN-B L BLK/GRY WIRE BLK/VIO WIRE BLOCK BLU WIRE BLU/WHT WIRE BRN WIRE BRN/RED WIRE CAN C H CAN C L COMPUTER DATA LINES SYSTEM DRIVER SEAT CONNECTOR BLOCK FRONT ELECTRICAL PREFUSE BOX (AT RIGHT REAR OF ENGINE COMPT) FRONT PASSENGER SEAT CONNECTOR FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 163 158 FUSE 18 GRY/YEL WIRE HOT AT ALL TIMES HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED LEFT FRONT BACKREST HEATED CUSHION (IF EQUIPPED) LEFT FRONT HEATED SEAT BUTTON LEFT FRONT SEAT SITTING SURFACE HEATED CUSHION (IF EQUIPPED) LIN 1 31 NCA WIRE REAR SAM CONTROL UNIT W/ FUSE, RELAY MODULE (RIGHT 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) STATIONARY HEATER BUTTON TRUNK/CARGO AREA) UPPER CONTROL PANEL CONTROL UNIT W/ ECO START/ STOP FUNCTION W/O ECO START/ STOP FUNCTION

ADJUSTMENT MOTOR (IN FRONT PASSENGER'S SEAT BACK) BLK/BLU WIRE BLK/GRY WIRE BLK/RED WIRE BLK/VIO WIRE BLK/YEL WIRE BRN WIRE BRN/RED WIRE COMPUTER DATA LINES SYSTEM DRIVER SEAT BACKREST INCLINATION ADJUSTMENT MOTOR (IN DRIVER'S SEAT BACK) DRIVER SEAT FORE/AFT ADJUSTMENT MOTOR (UNDER DRIVER'S SEAT) DRIVER SEAT HEIGHT ADJUSTMENT MOTOR (UNDER DRIVER'S SEAT) DRIVER SEAT INCLINATION ADJUSTMENT MOTOR (UNDER DRIVER'S SEAT) FRONT ELECTRICAL PREFUSE BOX (AT RIGHT REAR OF ENGINE COMPT) FRONT PASSENGER SEAT BACKREST INCLINATION FRONT PASSENGER SEAT FORE/AFT ADJUSTMENT MOTOR FRONT PASSENGER SEAT HEIGHT ADJUSTMENT MOTOR FRONT PASSENGER SEAT INCLINATION ADJUSTMENT MOTOR FUSE FUSE FUSE HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED FUSE LEFT FRONT BACKREST ADJUSTMENT SWITCH LEFT FRONT SEAT ADJUSTMENT SWITCH GROUP LEFT FRONT SEAT FORE/AFT ADJUSTMENT SWITCH LEFT FRONT SEAT HEIGHT ADJUSTMENT SWITCH LEFT FRONT SEAT INCLINATION ADJUSTMENT SWITCH REAR SAM CONTROL UNIT W/ FUSE, RELAY MODULE (RIGHT SIDE OF TRUNK/CARGO AREA) RED WIRE RED/WHT WIRE RIGHT FRONT BACKREST ADJUSTMENT SWITCH RIGHT FRONT SEAT ADJUSTMENT SWITCH GROUP RIGHT FRONT SEAT FORE/AFT ADJUSTMENT SWITCH RIGHT FRONT SEAT HEIGHT ADJUSTMENT SWITCH RIGHT FRONT SEAT INCLINATION ADJUSTMENT SWITCH SEAT ADJUSTMENT RELAY SIDE OF CARGO AREA) W/ ECO START/ STOP FUNCTION W/O ECO START/ STOP FUNCTION WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/GRN WIRE

1 2 FRONT PASSENGER SEAT BACKREST ADJUSTMENT SWITCH BLK WIRE BLK/BLU WIRE BLK/GRY WIRE BLK/VIO WIRE BLK/YEL WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/VIO WIRE BLU/WHT WIRE BRN WIRE BRN/RED WIRE C-CLASS COUPE COMPUTER DATA LINES SYSTEM (C-CLASS SEDAN) DRIVER SEAT BACKREST ADJUSTMENT SWITCH DRIVER SEAT HEIGHT ADJUSTMENT SWITCH DRIVER SEAT BACKREST INCLINATION ADJUSTMENT MOTOR (IN DRIVER'S SEAT BACK) DRIVER SEAT EASY ENTRY SYSTEM LIMIT SWITCH DRIVER SEAT HEIGHT ADJUSTMENT MOTOR (UNDER DRIVER'S SEAT) DRIVER SEAT PARTIALLY ELECTRIC SEAT ADJUSTMENT SWITCH FRONT ELECTRICAL PREFUSE BOX (RIGHT REAR OF ENGINE COMPT) FRONT PASSENGER SEAT EASY ENTRY SYSTEM LIMIT SWITCH FRONT PASSENGER SEAT HEIGHT ADJUSTMENT MOTOR (UNDER FRONT PASSENGER'S SEAT) FRONT PASSENGER SEAT HEIGHT ADJUSTMENT SWITCH FRONT PASSENGER SEAT PARTIALLY ELECTRIC SEAT ADJUSTMENT SWITCH FUSE FUSE 44 FUSE 45 FUSE 60 HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED MULTICONTOUR SEAT PNEUMATIC PUMP REAR SAM CONTROL UNIT W/ FUSE, RED WIRE RED/WHT WIRE RELAY MODULE (RIGHT SIDE OF TRUNK/CARGO AREA) SEAT ADJUSTMENT RELAY SIG W/ ECO START/ STOP FUNCTION W/O ECO START/ STOP FUNCTION WHT/BLK WIRE WHT/GRN WIRE

1 2 3 PNK WIRE 1 2 4 5 HS 1 HS (+) FH H FH T 1 2 5 4 CAN B L CAN B H 1 2 5 4 CAN B L CAN B H 30 31 4 5 2 1 FH H FH T H (+) HS 1 7 6 31 SIG 9 6 8 SIG SIG BLK WIRE BLK/BRN WIRE BLK/PNK WIRE BLK/VIO WIRE BRN WIRE BRN/PNK WIRE BRN/RED WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM FUSE 2 FUSE 3 FUSE 41 GRN WIRE GRY WIRE H (-) HOT AT ALL TIMES HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED HS(+) LEFT FRONT POWER WINDOW MOTOR (C-CLASS: CENTER OF LEFT FRONT DOOR) LEFT FRONT POWER WINDOW SWITCH LEFT REAR POWER WINDOW MOTOR (C-CLASS: CENTER OF LEFT REAR POWER WINDOW SWITCH NCA WIRE PASSENGER-SIDE POWER WINDOW SWITCH REAR SIDE RIGHT REAR WINDOW POWER CHILD SAFETY WINDOW LOCK SWITCH SWITCH RED WIRE RED/BLK WIRE RED/GRY WIRE RED/WHT WIRE RIGHT FRONT POWER WINDOW MOTOR (C-CLASS: CENTER OF RIGHT FRONT DOOR) RIGHT REAR DOOR RIGHT REAR POWER WINDOW MOTOR (C-CLASS: CENTER OF RIGHT REAR POWER WINDOW SWITCH SIG WHT WIRE YEL WIRE YEL/GRN WIRE YEL/GRY WIRE

BRN WIRE FUSE GRN/RED WIRE GRN/YEL WIRE GRY/YEL WIRE HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED LEFT FRONT BACKREST SEAT VENTILATION MOTORS LEFT FRONT SEAT CUSHION SEAT VENTILATION MOTORS LEFT FRONT SEAT VENTILATION BLOWER REGULATOR LEFT FRONT SEAT VENTILATION BUTTON LIN 1 NCA WIRE REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (RIGHT SIDE OF TRUNK/CARGO AREA) RED/BLU WIRE RED/GRN WIRE RED/GRY WIRE RED/YEL WIRE RIGHT FRONT BACKREST SEAT VENTILATION MOTORS RIGHT FRONT SEAT CUSHION SEAT VENTILATION MOTORS RIGHT FRONT SEAT VENTILATION BLOWER REGULATOR RIGHT FRONT SEAT VENTILATION BUTTON UPPER CONTROL PANEL CONTROL UNIT

BLK WIRE BLK/GRY WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/GRN WIRE BLU/YEL WIRE BRN WIRE BRN/BLK WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/VIO WIRE BRN/YEL WIRE DRIVER AIR BAG SQUIB 1 DRIVER AIR BAG SQUIB 2 DRIVER KNEEBAG SQUIB (IF EQUIPPED) (LOWER LEFT SIDE OF DASH) FANFARE HORNS, AIR BAG CLOCK SPRING CONTACT (TOP OF STEERING COLUMN) GRN WIRE GRN/YEL WIRE GRY WIRE LEFT FRONTAL ACCELERATION SENSOR (BEHIND LEFT SIDE OF FRONT BUMPER) LEFT REAR SIDE BAG SQUIB (IF EQUIPPED) (LEFT REAR "C" PILLAR) LEFT SIDE AIR BAG SENSOR (BASE OF LEFT "B" PILLAR) NCA WIRE PNK/BLK WIRE RED WIRE RED/VIO WIRE RIGHT FRONTAL ACCELERATION SENSOR (BEHIND RIGHT SIDE OF FRONT BUMPER) RIGHT SIDE AIR BAG SENSOR (BASE RIGHT "B" PILLAR) STEERING COLUMN MODULE CONTROL UNIT (TOP OF STEERING COLUMN) VIO WIRE VIO/GRN WIRE WHT WIRE WHT/BRN WIRE WHT/YEL WIRE YEL WIRE