Mercedes-Benz C-class W204/S204 (2006-2011) (under right front seat) Wiring diagrams

1 2 3 4 FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE (+) (-) 31 (+) 1 2 5 4 CAN B L CAN B H 30 31 1 3 2 6 7 8 9 31 DATA 31 SIG 4 10 5 6 8 7 FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE SIG 5 6 7 8 9 FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE 6 7 8 9 ZV-MOT ZV-MOT GND SIG 9 10 12 14 15 17 CAN-B H CAN-B L ZV ZV ZV ZV BRN WIRE BRN/GRN WIRE BRN/PNK WIRE BRN/RED WIRE CENTRAL MOTOR LOCKING RIGHT FRONT DOOR LOCK CENTRAL W/ LOCKING KEYLESS GO MOTOR W/O LEFT FRONT KEYLESS GO DOOR LOCK COMPUTER DATA LINES SYSTEM FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE 12 13 14 15 FUSE 2 FUSE 3 FUSE 89 GRN WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/GRN WIRE GRY/PNK WIRE HOT AT ALL TIMES LEFT FRONT DOOR CONTROL UNIT NCA WIRE PASSENGER-SIDE POWER WINDOW SWITCH RED WIRE RED/GRY WIRE RED/WHT WIRE RIGHT FRONT DOOR CENTRAL LOCKING INTERIOR SWITCH RIGHT FRONT DOOR CONTROL UNIT RIGHT FRONT DOOR EXIT, WARNING LAMP (W/ INTERIOR LIGHTS PACKAGE) RIGHT FRONT DOOR HANDLE ILLUMINATION (W/ INTERIOR LIGHTS PACKAGE) ROTARY TUMBLER SWITCH SIG LED TRUNK LID RELEASE/ DRIVER TAILGATE CONTROL BUTTON (IF EQUIPPED) W/ KEYLESS GO W/O KEYLESS GO W/ TRUNK LID RELEASE, TAILGATE CONTROL W/O TRUNK LID RELEASE, TAILGATE CONTROL WHT WIRE ZV-MOT ZV-MOT GND SIG

1 2 3 4 (+) (-) 31 (+) 1 2 5 4 CAN B L CAN B H 18 28 ZV SIG 3 2 FLAT WIRE FLAT WIRE 30 31 4 3 CAN-B H CAN-B L SIG SIG 5 6 7 8 9 FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE 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 FLAT WIRE FLAT WIRE 12 13 14 15 FUSE FUSE GRN WIRE GRN/BLU WIRE GRN/YEL WIRE GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/GRN WIRE GRY/PNK WIRE LEFT FRONT DOOR CENTRAL LOCKING INTERIOR SWITCH LEFT FRONT DOOR DOOR HANDLE ILLUMINATION LEFT FRONT DOOR EXIT, WARNING LAMP LEFT REAR DOOR CONTROL UNIT LEFT REAR DOOR DOOR HANDLE ILLUMINATION (W/ INTERIOR LIGHTS PACKAGE) LEFT REAR DOOR EXIT, WARNING LAMP (W/ INTERIOR LIGHTS PACKAGE) LEFT REAR DOOR LOCK REAR SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT SIDE OF TRUNK/ CARGO AREA) RED WIRE RED/GRY WIRE RED/WHT WIRE RIGHT REAR DOOR CONTROL UNIT RIGHT REAR DOOR LOCK ROTARY TUMBLER SWITCH TAILGATE CONTROL BUTTON (W/ AUTOMATIC TAILGATE, KEYLESS GO) TANK CAP CENTRAL LOCKING MOTOR (RIGHT SIDE OF TRUNK) TRUNK LID RELEASE/ DRIVER TAILGATE CONTROL BUTTON W/ INTERIOR LIGHTS PACKAGE W/ KEYLESS W/O KEYLESS W/O KEYLESS W/ KEYLESS

2 1 4 3 10 9 31 SIG SH (+) SH (-) 31 (+) 2 1 5 4 CAN B H CAN B L 30 31 2 1 5 4 COMPUTER CAN-B H CAN-B L 30 31 DATA LINES SYSTEM 9 10 3 4 (+) 31 SH (-) SH (+) AUTOMATIC DIMMING MIRROR (W/ ENTRANCE EXIT LAMPS) LEFT OUTSIDE MIRROR 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 HOT AT ALL TIMES IN/OUT MOTOR (IF EQUIPPED) LEFT EXTERIOR MIRROR TURN SIGNAL LAMP LEFT FRONT DOOR CONTROL UNIT MIRROR HEATER OUTSIDE MIRROR FOLD-IN/ FOLD-OUT SWITCH (IF EQUIPPED) RED/GRY WIRE RED/WHT WIRE RIGHT EXTERIOR MIRROR TURN SIGNAL LAMP RIGHT FRONT DOOR CONTROL UNIT RIGHT OUTSIDE MIRROR

BRN WIRE ELECTRONIC STABILITY PROGRAM CONTROL UNIT FUEL PUMP CONTROL MODULE REAR WINDOW GLASS BREAKAGE SENSOR REAR WINDOW INTERFERENCE SUPPRESSION CAPACITOR 1 REAR WINDOW INTERFERENCE SUPPRESSION CAPACITOR 2 SUPPLEMENTAL RESTRAINT SYSTEM CONTROL UNIT 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

31 30 7 34 8 CAN B L CAN B H TG R 40 41 CAN C L CAN C H 41 54 CAN E H CAN E L 6 7 CAN C L CAN C H 7 6 24 5 GSS, BF RETURN LINE SBE GSS, FA 74 75 CAN-E L CAN-E H ACOUSTIC TURN SIGNAL LIGHT FUNCTION CHECK ANTI-LOCK BRAKE SYSTEM INDICATOR LAMP AREA) BBV HL BBV HR BFS BLK WIRE BLU WIRE BLU/BLK WIRE BLU/GRN WIRE BLU/WHT WIRE BRAKE FLUID LEVEL SWITCH (IN BRAKE FLUID RESERVOIR) BRAKE FLUID, PARKING BRAKE WARNING LAMP (EXCEPT USA) BRN WIRE BRN/BLK WIRE BRN/BLU WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE CAN B L CAN B H CAN E H CAN E L CAN-E L CAN-E H COMPUTER DATA LINES SYSTEM CONSOLE) COOLANT TEMPERATURE GAUGE DRIVER SEAT BELT BUCKLE RESTRAINT SYSTEMS SWITCH (IN DRIVER'S SEAT BELT BUCKLE) ELECTRONIC SELECTOR LEVER MODULE CONTROL MODULE (UNDER CENTER ELECTRONIC STABILITY PROGRAM WARNING LAMP ELECTRONIC TRANSMISSION CONTROL UNIT ENGINE COOLANT TEMPERATURE MALFUNCTION INDICATOR ENGINE DIAGNOSIS MALFUNCTION INDICATOR LAMP FRONT PASSENGER SEAT OCCUPIED RECOGNITION (W/ SEAT BELT REMINDER WARNING) FUEL LEVEL INDICATOR FUEL RESERVE INDICATOR LAMP FUSE 28 GEAR DISPLAY (PRND) GRN WIRE GRN/WHT WIRE GRY/GRN WIRE HIGH BEAM INDICATOR LAMP INSTRUMENT CLUSTER INSTRUMENT ILLUMINATION INSTRUMENT ILLUMINATION BRIGHTNESS CONTROL LEFT FUEL LEVEL INDICATOR SENSOR (IN FUEL TANK) LEFT TURN SIGNAL IND LAMP ME-SFI (ME) CONTROL MODULE (TOP CENTER OF ENGINE) MULTI-FUNCTION DISPLAY NCA WIRE PARKING BRAKE INDICATOR SWITCH (ON PARKING BRAKE SUPPORT BRACKET) REAR SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT SIDE OF TRUNK/CARGO RED/GRY WIRE RED/YEL WIRE RIGHT FRONT BRAKE WEAR SENSOR (AT RIGHT FRONT BRAKE ASSEMBLY) RIGHT FUEL LEVEL INDICATOR SENSOR (IN FUEL TANK) RIGHT REAR BRAKE PAD WEAR SENSOR (AT RIGHT REAR BRAKE ASSEMBLY) RIGHT TURN SIGNAL IND LAMP SEAT BELT REMINDER LAMP SERVICE BRAKE INDICATOR LAMP (USA) SIG SPEEDOMETER SUPPLEMENTAL RESTRAINT SYSTEM CONTROL UNIT (UNDER FRONT OF CENTER CONSOLE) SUPPLEMENTAL RESTRAINT SYSTEM INDICATOR LAMP TACHOMETER, BRIGHTNESS SENSOR TG L TIRE PRESSURE MONITOR WARNING LAMP (IF EQUIPPED) TRANSMISSION MODE DISPLAY VIO/GRN WIRE WARNING BUZZER YEL WIRE YEL/RED 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 HS(-) ML/K HS(+) ML+ HS(+) MK+ 1 2 CAN B L CAN B H 3 2 1 FLAT WIRE FLAT WIRE FLAT WIRE 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 CAN B H CAN B L COMPUTER DATA LINES SYSTEM 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 FRONT PASSENGER SEAT HEAD RESTRAINT ADJUSTMENT MOTOR GRY WIRE HV_MOT+ NV_MOT- NV_MOT+ LV_MOT- LV_MOT+ HV_MOT- RED WIRE RED/GRN WIRE RED/YEL WIRE RIGHT FRONT DOOR CONTROL UNIT RIGHT FRONT SEAT ADJUSTMENT SWITCH GROUP VIO WIRE VIO/WHT WIRE VIO/YEL WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE

BLK/RED WIRE BLK/YEL WIRE BLU WIRE BRN WIRE CIRCUIT 15 RELAY EMERGENCY DVD PLAYER CALL SYSTEM (IF EQUIPPED) CONTROL UNIT (IF EQUIPPED) FROM FUSE 41 (DIAGRAM FROM FUSE 46 (DIAGRAM FROM FUSE 61 (DIAGRAM 1 OF 1) FRONT CIGARETTE LIGHTER W/ ASHTRAY ILLUMINATION (W/ SMOKER PACKAGE) FRONT VEHICLE INTERIOR POWER OUTLET (W/ NON- CG SMOKER PACKAGE) FUEL PUMP CONTROL MODULE FUEL PUMP RELAY MODULE FUSE FUSE 37 FUSE 38 FUSE 39 FUSE 41 FUSE 42 FUSE 54 FUSE 56 FUSE 59 FUSE 60 FUSE 71 FUSE 83 FUSE 86 FUSE 84 FUSE FUSE GRY WIRE GRY/BLU WIRE LEFT REAR DOOR CONTROL UNIT MULTICONTOUR SEAT PNEUMATIC PUMP (IF EQUIPPED) NCA WIRE PNK PNK WIRE PNK WIRE PNK/RED WIRE RED WIRE RED/BLK WIRE RED/BLU (OR PNK/RED) WIRE RED/BLU WIRE RED/GRN WIRE RED/GRY WIRE RED/WHT WIRE RED/YEL WIRE RELAY 1 RES FUSE RIGHT REAR DOOR CONTROL UNIT SEAT ADJUSTMENT RELAY TAILGATE WINDSHIELD WIPER RELAY TO FRONT SAM CONTROL W/ FUSE, RELAY MODULE (DIAGRAM 4 OF 5) TO FUSE 42 (DIAGRAM 2 OF 5) TO FUSE 74 (DIAGRAM TO FUSE 76 (DIAGRAM TO FUSE 85 (DIAGRAM TRAILER RECOGNITION CONTROL MODULE (W/ TOWING HITCH) VEHICLE INTERIOR POWER OUTLET (W/ REAR SOCKET) W/O W/ SMOKER SMOKER PACKAGE PACKAGE YEL WIRE