Mercedes-Benz C-class W204/S204/С204 facelift (2011-2015) computer data lines system Wiring diagrams

10 9 CAN B L CAN B H 17 18 12 13 CAN B L CAN B H CAN E L CAN E H 3 1 CAN E L CAN E H 4 3 15 LWR ACOUSTIC TURN SIGNAL LIGHT FUNCTION CHECK BLK WIRE BLK/BLU WIRE BLK/GRN WIRE BLK/PNK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE BRN/RED WIRE COMPUTER DATA LINES SYSTEM EXTERIOR LIGHTS SWITCH FRONT FOG LAMP BUTTON FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 29 FUSE 5 FUSE 30 GRN WIRE GRN/WHT WIRE GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/BRN WIRE GRY/PNK WIRE GRY/WHT WIRE GRY/YEL WIRE HAZARD WARNING FLASHER SWITCH HEADLAMPS HOT W/ CIRCUIT 15 RELAY ENERGIZED ILLUMINATION SWITCH INSTRUMENT CLUSTER INSTRUMENT PANEL SWITCH GROUP LEFT FRONT LAMP UNIT LEFT FRONT LAMP UNIT TURN STANDING/ PARKING LAMP SIGNAL LAMP LEFT FRONT STANDING, PARKING LAMP LEFT FRONT TURN SIGNAL LAMP LEFT SIGNAL LAMP ACTUATION MODULE LED LEFT TURN SIGNAL IND LIGHT LIN 1 LWR PNK WIRE PNK/RED WIRE REAR FOG LIGHT BUTTON RED WIRE RIGHT TURN SIGNAL IND LIGHT W/ XENON WHT WIRE YEL WIRE

1 2 CAN B L CAN B H 9 10 (+) 31 BLK WIRE BLK/BLU WIRE BLK/GRN WIRE BLS L BLS H BLS M CAN E L CAN E H 31 31 BLU WIRE BRN WIRE BRN/RED WIRE COMPUTER DATA LINES SYSTEM ELECTRONIC STABILITY PROGRAM CONTROL UNIT (LEFT FRONT OF ENGINE COMPT) FRONT SAM CONTROL UNIT W/ FUSE FUSE 1, RELAY MODULE (LEFT REAR OF ENGINE COMPT) GRN WIRE GRN/WHT WIRE GRY WIRE GRY/WHT WIRE HOT AT ALL TIMES LEFT FRONT DOOR CONTROL MODULE (FRONT OF LEFT FRONT DOOR) LEFT FRONT SIDE MARKER LAMP LEFT OUTSIDE MIRROR NCA WIRE PNK PNK WIRE PNK WIRE PNK/BLU WIRE PNK/GRN WIRE PNK/RED WIRE PNK/WHT WIRE RED WIRE RED/GRN WIRE RIGHT ACTIVE CURVE ILLUMINATION ACTUATOR MOTOR RIGHT ACTIVE CURVE ILLUMINATION POSITION SENSOR RIGHT FRONT DOOR CONTROL MODULE (FRONT OF RIGHT FRONT DOOR) RIGHT FRONT SIDE MARKER LAMP RIGHT FRONT STANDING, PARKING LAMP RIGHT FRONT TURN SIGNAL LAMP RIGHT OUTSIDE MIRROR RIGHT RIGHT FRONT LAMP UNIT FRONT LAMP UNIT RIGHT SIGNAL LAMP ACTUATION MODULE LED STOP LAMP SWITCH (TOP OF BRAKE PEDAL ASSEMBLY) TURN SIGNAL LAMP TURN STANDING/ PARKING LAMP SIGNAL LAMP W/ XENON WHT WIRE

16 15 23 2 BSL R 24 22 21 NSL-L RFL-L RFL-R 31 30 CAN B L CAN B H 31 LIN 2 4 1 2 30 CAN E L CAN E H 58 58 54 SL R 6 7 CAN B L CAN B H BLK WIRE BLK/BLU WIRE BLK/BRN WIRE BLK/GRN WIRE BLK/RED WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BRN WIRE BRN/GRY WIRE BRN/RED WIRE BSL L COMBINATION SWITCH COMPUTER DATA LINES SYSTEM FOG BACKUP BACKUP LAMP LAMP LAMP FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 13 FUSE 164 GRN WIRE GRN/BLU WIRE GRN/WHT WIRE GRY WIRE GRY/BLU WIRE GRY/RED WIRE GRY/VIO WIRE GRY/YEL WIRE HEADLAMP FLASHER/ HIGH BEAM SWITCH HOT AT ALL TIMES INNER STOP/ TAIL LAMP INNER TURN SIGNAL LAMP TAIL/ STOP/ PARKING TAIL LAMP LAMP LEFT LICENSE PLATE LAMP CENTER STOP LAMP LEFT REAR LAMP UNIT NSL-R PNK SL L WIRE PNK WIRE PNK/RED WIRE RAIN/LIGHT SENSOR (W/ RAIN/LIGHT SENSOR) REAR SAM CONTROL UNIT W/ FUSE, RELAY MODULE (RIGHT SIDE OF TRUNK) RED WIRE RED/BLU WIRE RIGHT LICENSE PLATE LAMP RIGHT REAR LAMP UNIT SIDE MARKER LAMP SIDE MARKER LAMP FOG LAMP STEERING COLUMN MODULE CONTROL UNIT (TOP OF STEERING COLUMN) STOP STOP/ TURN SIGNAL LAMP TAIL/ PARKING LAMP TURN SIGNAL LAMPS SWITCH VIO WIRE VIO/BLU WIRE W/O ECO START/STOP FUNCTION W/ ECO START/STOP FUNCTION WHT WIRE YEL 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

3 7 LWR 9 10 CAN-B H CAN-B L BLK/BLU WIRE BLK/PNK WIRE BRN WIRE BRN/BLK WIRE BRN/RED WIRE COMPUTER DATA LINES SYSTEM FRONT ELECTRICAL PREFUSE BOX (AT RIGHT REAR OF ENGINE COMPT) FRONT FOG LAMP BUTTON FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE FUSE 152 FUSE 161 156 FUSE 4 FUSE 29 FUSE 30 FUSE 5 GRN WIRE GRN/BLK WIRE GRN/BLU WIRE GRN/WHT WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/BRN WIRE GRY/PNK WIRE HOT AT ALL TIMES HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED HOT W/CIRCUIT 15 RELAY ENERGIZED ILLUMINATION LEFT DAYTIME RUNNING LAMPS HEADLAMP (IF EQUIPPED) LWR 31 PARKING BRAKE INDICATOR SWITCH (ON PARKING BRAKE SUPPORT BRACKET) PNK/RED WIRE PNK/WHT WIRE REAR FOG LAMP BUTTON RED WIRE RED/BLU WIRE RED/WHT WIRE RIGHT ACTIVE CURVE ILLUMINATION ACTUATOR MOTOR RIGHT ACTIVE CURVE ILLUMINATION POSITION SENSOR RIGHT CORNERING RIGHT FRONT LAMP UNIT RIGHT HEADLAMP RANGE ADJUSTMENT ACTUATOR MOTOR RIGHT LIGHT DISTRIBUTION ACTUATOR MOTOR RIGHT LIGHT DISTRIBUTION POSITION SENSOR RIGHT XENON BULB W/ INTEGRATED IGNITION MODULE RIGHT XENON LIGHT POWER SUPPLY MODULE SIG SWITCH ILLUMINATION W/O ECO START/ STOP FUNCTION W/ ECO START/ STOP FUNCTION WHT/BLU WIRE WHT/RED WIRE YEL WIRE YEL/BLK WIRE

12 13 17 18 CAN E L CAN E H CAN B L CAN B H 30 31 CAN E H CAN E L ABBL-R 31 15 ABBL-L BLK/BLU WIRE BRN WIRE BRN/RED WIRE CAN B H CAN B L COMBINATION SWITCH COMPUTER DATA LINES SYSTEM FRONT ELECTRICAL PREFUSE BOX (AT RIGHT REAR OF ENGINE COMPT) FRONT FOG LAMPS INDICATOR LAMP FUSE GRN WIRE GRN/BLK WIRE GRN/BLU WIRE GRN/WHT WIRE GRN/YEL WIRE HEADLAMP CONTROL UNIT HEADLAMP FLASHER/ HIGH BEAM SWITCH HIGH BEAM INDICATOR HOT AT ALL TIMES ILLUMINATION INSTRUMENT CLUSTER LEFT ACTIVE CURVE ILLUMINATION ACTUATOR MOTOR LEFT ACTIVE CURVE ILLUMINATION POSITION SENSOR LEFT CORNERING LEFT FRONT LAMP UNIT LEFT HEADLAMP RANGE ADJUSTMENT ACTUATOR MOTOR LEFT LIGHT DISTRIBUTION ACTUATOR MOTOR LEFT LIGHT DISTRIBUTION POSITION SENSOR LEFT REAR LAMP UNIT LEFT XENON BULB W/ INTEGRATED IGNITION MODULE LEFT XENON LIGHT POWER SUPPLY MODULE (BEHIND LEFT SIDE OF FRONT BUMPER) LOW BEAM INDICATOR LAMP LOW BEAM SWITCH PNK/WHT WIRE REAR FOG LAMP REAR FOG LAMP INDICATOR RED WIRE RED/BLU WIRE RIGHT DAYTIME RUNNING LAMPS HEADLAMPS (IF EQUIPPED) RIGHT REAR LAMP UNIT SIG SIG 31 31 CAN G L CAN G H STEERING COLUMN MODULE CONTROL UNIT W/O ECO START/STOP FUNCTION WHT/BLU WIRE WHT/RED WIRE WHT/YEL WIRE YEL/BLK WIRE YEL/WHT 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

7 6 24 5 GSS, BF RETURN LINE SBE GSS, FA 74 75 COMPUTER DATA LINES SYSTEM CAN E L CAN E H ACOUSTIC TURN SIGNAL LIGHT FUNCTION CHECK ANTI-LOCK BRAKE SYSTEM INDICATOR LAMP BBV HR BBV VL BFS BLK WIRE BLU WIRE BRAKE SYSTEM WARNING LAMP 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 COOLANT TEMPERATURE GAUGE COOLANT TEMPERATURE WARNING LAMP DIGITAL CLOCK, OUTSIDE TEMPERATURE INDICATOR DISTRONIC WARNING LAMP (IF EQUIPPED) ELECTRONIC STABILITY PROGRAM WARNING LAMP ENGINE DIAGNOSIS INDICATOR LAMP ESP/ASR OFF WARNING LAMP FRONT FOG LAMPS INDICATOR LAMP FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUEL LEVEL INDICATOR FUEL RESERVE INDICATOR LAMP FUSE 28 FUSE 18 GASOLINE GEAR INDICATOR (PRND) GRN WIRE GRN/WHT WIRE GRY/GRN WIRE GRY/YEL WIRE HIGH BEAM INDICATOR LAMP HOT AT ALL TIMES INSTRUMENT CLUSTER INSTRUMENT ILLUMINATION INSTRUMENT ILLUMINATION BRIGHTNESS CONTROL LEFT TURN SIGNAL IND LAMP LIN 1 LOW BEAM INDICATOR LAMP MULTI-FUNCTION DISPLAY PREGLOW INDICATOR LAMP (DIESEL) RED/GRN WIRE RED/GRY WIRE RED/YEL WIRE RIGHT TURN SIGNAL IND LAMP SEAT BELT WARNING LAMP SERVICE BRAKE INDICATOR LAMP SIG SPEEDOMETER SUPPLEMENTAL RESTRAINT SYSTEM CONTROL UNIT (UNDER FRONT OF CENTER CONSOLE) SUPPLEMENTAL RESTRAINT SYSTEM INDICATOR LAMP TACHOMETER, BRIGHTNESS SENSOR TIRE PRESSURE MONITOR WARNING LAMP (IF EQUIPPED) TRANSMISSION MODE DISPLAY (S) TRAVEL DISTANCE DISPLAY VIO/GRN WIRE WARNING BUZZER YEL WIRE YEL/BLU WIRE YEL/RED WIRE

31 30 7 34 8 CAN B L CAN B H TG R 6 7 CAN C L CAN C H ATA (EDW) FUNCTION INDICATOR AUTOMATIC CHILD SEAT RECOGNITION AIR BAG OFF INDICATOR LAMP BLU WIRE BLU/BLK WIRE BLU/GRN WIRE BLU/WHT WIRE BRAKE FLUID LEVEL SWITCH (IN BRAKE FLUID RESERVOIR) BRN WIRE BRN/BLK WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM DOWNHILL SPEED REGULATION BUTTON (GLK CLASS) ECO START/ STOP FUNCTION BUTTON ELECTRONIC SELECTOR LEVER MODULE CONTROL MODULE (C-CLASS: UNDER CENTER CONSOLE) GRY/YEL WIRE HAZARD WARNING SYSTEM BUTTON LEFT FRONT HEATED SEAT BUTTON LEFT FRONT SEAT VENTILATION BUTTON LEFT FUEL LEVEL INDICATOR SENSOR (IN FUEL TANK) LIN 1 NCA WIRE OFFROAD PROGRAM BUTTON (GLK CLASS) PARKING BRAKE INDICATOR SWITCH (PARKING BRAKE SUPPORT BRACKET) PARKING SYSTEM BUTTON REAR HEAD RESTRAINTS BUTTON REAR SAM CONTROL UNIT W/ FUSE, RELAY MODULE (RIGHT SIDE OF TRUNK/ CARGO AREA) REAR WINDOW ROLLER SUN BLIND BUTTON RED/GRN WIRE RED/GRY WIRE RIGHT FRONT BRAKE PAD WEAR SENSOR (C-CLASS: AT RIGHT FRONT BRAKE ASSEMBLY) RIGHT FRONT HEATED SEAT BUTTON RIGHT FRONT SEAT VENTILATION BUTTON RIGHT FUEL LEVEL INDICATOR SENSOR (IN FUEL TANK) RIGHT REAR BRAKE PAD WEAR SENSOR (AT RIGHT REAR BRAKE ASSEMBLY) STATIONARY HEATER BUTTON TG L UPPER CONTROL PANEL CONTROL UNIT VEHICLE DYNAMICS BUTTON YEL/RED WIRE

1 2 3 4 5 6 7 8 9 10 31/1 15 54 31 LED 31/2 AHK BLK WIRE BLK/GRN WIRE BLK/RED WIRE BLK/WHT WIRE BLU WIRE BRN WIRE BRN/RED WIRE CAN-B H CAN-B L COMPUTER DATA LINES SYSTEM FRONT ELECTRICAL PREFUSE BOX (AT RIGHT REAR OF ENGINE COMPT) FUSE FUSE 53 FUSE 54 FUSE 57 FUSE 58 FUSE 89 GRN WIRE GRY WIRE GRY/YEL WIRE HOT AT ALL TIMES HOT W/ CIRCUIT 15 RELAY ENERGIZED HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED LED REAR SAM CONTROL UNIT W/ FUSE, RELAY MODULE (RIGHT SIDE OF TRUNK/CARGO AREA) RED WIRE RED/BLU WIRE RED/GRN WIRE RED/YEL WIRE RFL (+) TRAILER HITCH LOCKING SWITCH (W/ SWIVELING TRAILER HITCH) TRAILER HITCH RELEASE (W/ SWIVELING TRAILER HITCH) TRAILER RECOGNITION CONTROL UNIT TRAILER SOCKET W/O ECO START/ STOP FUNCTION W/ ECO START/ STOP FUNCTION WHT WIRE