Mercedes-Benz C-class W204/S204/С204 facelift (2011-2015) hot at all times Wiring diagrams

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

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

1 3 30 LIN 1 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 REAR SAM CONTROL UNIT W/ FUSE, RELAY MODULE (RIGHT SIDE OF TRUNK/CARGO AREA) REAR WINDOW ROLLER SUN BLIND BUTTON REAR WINDOW ROLLER SUN BLIND MOTOR (CENTER OF HAT SHELF) RED WIRE RED/GRN WIRE UPPER CONTROL PANEL CONTROL UNIT W/O ECO START/ STOP BUTTON W/ ECO START/ STOP BUTTON WHT WIRE YEL WIRE

1 2 CAN B L CAN B H 1 4 12 13 17 18 31 30 CAN E L CAN E H CAN B L CAN B H 12 31 6 5 31 31 RETURN LINE GSS, FA 8 9 GND SIG BBV HR BBV VL BFS BLU WIRE BRAKE FLUID LEVEL SWITCH (IN BRAKE FLUID RESERVOIR) 81 74 75 30 CAN E L CAN E H BRAKE SYSTEM WARNING LAMP BRN WIRE BRN/BLK WIRE BRN/GRN WIRE BRN/PNK WIRE BRN/RED WIRE BRN/WHT WIRE CAN B H CAN B L CAN E H CAN E L COMPUTER DATA LINES SYSTEM DIESEL DRIVER SEAT BELT BUCKLE RESTRAINT SYSTEMS SWITCH (IN DRIVER'S SEAT BELT BUCKLE) FUSE 15 FUSE 28 GASOLINE GRN (OR WIRE GRN WIRE GRN/WHT WIRE GRY WIRE GRY/GRN WIRE HOT AT ALL TIMES INSTRUMENT CLUSTER LEFT FRONT DOOR CONTROL UNIT (LEFT FRONT DOOR ASSEMBLY) LEFT FRONT DOOR LOCK ROTARY TUMBLER SWITCH MULTI-FUNCTION DISPLAY NCA WIRE PARKING BRAKE INDICATOR SWITCH (ON PARKING BRAKE SUPPORT BRACKET) RED WIRE RED/BRN WIRE RED/GRY WIRE RED/YEL WIRE RIGHT FRONT BRAKE WEAR SENSOR (ON RIGHT FRONT BRAKE CALIPER ASSEMBLY) RIGHT REAR BRAKE WEAR SENSOR (ON RIGHT REAR BRAKE CALIPER ASSEMBLY) SEAT BELT WARNING LAMP SERVICE BRAKE IND LAMP SIG SUPPLEMENTAL RESTRAINT SYSTEM CONTROL UNIT (UNDER FRONT OF CENTER CONSOLE) W/ KEYLESS GO W/O KEYLESS GO WARNING BUZZER YEL WIRE YEL/RED WIRE

AUTOMATIC CHILD SEAT RECOGNITION AIR BAG OFF IND LAMP BLK/GRY WIRE BLU WIRE BLU/BLK WIRE BLU/GRN WIRE BLU/YEL WIRE BRN WIRE BRN/BLK WIRE BRN/BLU WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/PNK WIRE BRN/VIO WIRE BRN/YEL WIRE CAN-E L CAN-E H COMPUTER DATA LINES SYSTEM CRH OUT ANLG DRIVER SEAT BELT BUCKLE RESTRAINT SYSTEM SWITCH (IN DRIVER SEAT BELT BUCKLE) FUSE 15 FUSE 18 FUSE 21 GRN WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/GRN WIRE GRY/YEL WIRE HOT AT ALL TIMES HOT W/ CIRCUIT KB, FA- KB, FA+ LEFT FRONT DOOR PRESSURE SENSOR (IN LEFT FRONT DOOR) LIN LIN 1 ME-SFI (ME) CONTROL UNIT (3.5L: LEFT SIDE OF ENGINE) PNK/BLK WIRE PNK/WHT WIRE REAR HEAD RESTRAINTS BUTTON RED/BRN WIRE RED/GRN WIRE RIGHT FRONT DOOR PRESSURE SENSOR (IN RIGHT FRONT DOOR) SUPPLEMENTAL RESTRAINT SYSTEM CONTROL UNIT (UNDER FRONT OF CENTER CONSOLE) UPPER CONTROL PANEL CONTROL UNIT VIO WIRE VIO/GRN WIRE W/ WEIGHT SENSING SYSTEM WHT/YEL WIRE YEL WIRE YEL/BRN WIRE

BLK WIRE BLK/GRY WIRE BLK/VIO WIRE BLK/WHT WIRE BLK/YEL WIRE BLU/BLK WIRE BLU/GRN WIRE BRN WIRE BRN/BLK WIRE BRN/GRN WIRE BRN/PNK WIRE BRN/VIO WIRE BRN/YEL WIRE CAN L COMPUTER DATA LINES SYSTEM DRIVER ETR (GUS) SQUIB DRIVER PELVIS AIR BAG SQUIB (IF EQUIPPED) (OUTER SIDE OF DRIVER FRONT SEAT) DRIVER SEAT NECK-PRO HEAD RESTRAINT SOLENOID (C-CLASS: IN DRIVER HEADREST) FRONT ELECTRICAL PRE-FUSE BOX (AT RIGHT REAR OF ENGINE COMPT) FRONT PASSENGER ETR (GUS) SQUIB FRONT SAM CONTROL FUSE FUSE 150 FUSE MODULE W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) GRN WIRE GRN/VIO WIRE GRN/WHT WIRE GRN/YEL WIRE GS, HL+ GS, HL- SB, BF- SB, BF+ GS, HR+ GS, HR- PG, BF- PG, BF+ PG, FA+ PG, FA- CAK, FA CAK, BF HOT AT ALL TIMES HOT W/ INSTRUMENT CLUSTER LEFT WINDOW BAG SQUIB PNK WIRE REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (RIGHT SIDE OF TRUNK/ CARGO AREA) RED WIRE RED/BLK WIRE RED/BLU WIRE RED/GRN WIRE RED/VIO WIRE RED/YEL WIRE RELAY 1 ENERGIZED RIGHT REAR SIDE BAG SQUIB (IF EQUIPPED) (RIGHT REAR "C" PILLAR) RIGHT WINDOW AIR BAG SQUIB SB, FA- SB, FA+ (+) (-) WB, VR- WB, VR+ SB, HR+ SB, HR- SUPPLEMENTAL RESTRAINT SYSTEM CONTROL UNIT SUPPLEMENTAL RESTRAINT SYSTEM INDICATOR LAMP VIO/BLU WIRE VIO/GRN WIRE VIO/YEL WIRE W/O ECO START/STOP FUNCTION WHT WIRE WHT/BLK WIRE WHT/BRN WIRE WHT/GRN WIRE WHT/VIO WIRE

BRN WIRE BRN/RED WIRE CAN B H CAN B L CAN E H CAN E L COMPUTER DATA LINES SYSTEM FRONT SAM CONTROL UNIT FUSE 28 W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) GRN WIRE GRN/WHT WIRE HOT AT ALL TIMES INSTRUMENT CLUSTER LEFT FRONT TIRE PRESSURE SENSOR LEFT REAR TIRE PRESSURE SENSOR RED/GRN WIRE RED/YEL WIRE RIGHT FRONT TIRE PRESSURE SENSOR RIGHT REAR TIRE PRESSURE SENSOR TIRE PRESSURE MONITOR WARNING LAMP

-1 +2 1 2 3 4 5 6 7 8 9 10 GND GND 1-2, 3-4, 5-6, 7-8) 4 2 1 5 31 CAN B H CAN B L 30 BLK/WHT WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/RED WIRE BRN/YEL WIRE CAN B H CAN B L CAN B L CAN B H COMPUTER DATA LINES SYSTEM FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 2 FUSE 61 GND SIG GRN/BLK WIRE GRN/BLU WIRE GRN/GRY WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/BLU WIRE GRY/PNK WIRE HFE HOT AT ALL TIMES HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED LEFT FRONT DOOR CONTROL UNIT (FRONT OF LEFT FRONT DOOR) NCA WIRE ORG/ WIRE ORG/GRN WIRE REAR SAM CONTROL UNIT W/ FUSE, RELAY MODULE (RIGHT SIDE OF TRUNK) RED/WHT WIRE RED/YEL WIRE RIGHT TAILGATE CONTROL OBSTRUCTION SENSOR STRIP (RIGHT SIDE OF TAILGATE) SIG SIG SIG TAILGATE CENTRAL LOCKING MOTOR TAILGATE CONTROL BUTTON (W/ AUTOMATIC TAILGATE, KEYLESS GO SYSTEM) TAILGATE CONTROL DRIVE UNIT TAILGATE CONTROL MAGNETIC CLUTCH TAILGATE CONTROL POSITION SENSOR TAILGATE CONTROL TAILGATE ELECTRIC CONTROL MOTOR HALL SENSOR TAILGATE CONTROL UNIT (GLK-CLASS) TAILGATE CONTROL WARNING BUZZER (BOTTOM OF TAILGATE) TAILGATE EXTERNAL OPERATION SWITCH TAILGATE LOCKING ELEMENT (GLK-CLASS) TRUNK LID EMERGENCY OPENING SWITCH (TRUNK LID) W/ AUTOMATIC TAILGATE W/O AUTOMATIC TAILGATE WHT WIRE WHT/BLU WIRE WHT/YEL WIRE YEL WIRE