Mercedes-Benz C-class W204/S204/С204 facelift (2011-2015) hot w/ quiescent current cutout relay energized Wiring diagrams

12 13 17 18 CAN E L CAN E H CAN B L CAN B H 2 3 1 31 LIN 1 30 30 31 5 CAN B H CAN B L EMD 4 3 2 1 S_GB 30 6 5 4 3 2 1 ASS OFF ASS LED 31 6 5 4 3 2 1 OFF INTERIOR PROTECTION SWITCH ANTI-THEFT ALARM SYSTEM INDICATOR LAMP INSTRUMENT PANEL SWITCH GROUP BLK WIRE BLK/WHT WIRE BLU WIRE BLU/BLK WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/PNK WIRE BRN WIRE BRN/BLK WIRE BRN/GRY WIRE BRN/RED WIRE BRN/WHT WIRE CAN B L CAN B H CAN-B H CAN-B L COMPUTER DATA LINES SYSTEM EMERGENCY CALL SYSTEM CONTROL UNIT (CENTER FRONT OF TRUNK/CARGO AREA) FAN RELAY MODULE FRONT ELECTRICAL PREFUSE BOX (RIGHT REAR OF ENGINE COMPT) FUSE FUSE 17 FUSE 18 GRN WIRE GRN/WHT WIRE GRY/YEL WIRE HORNS SYSTEM HOT AT ALL TIMES HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED INFO INFO LED INSTRUMENT CLUSTER INTERIOR LEFT INTERIOR PROTECTION PROTECTION RECEIVER TRANSMITTER INTERIOR PROTECTION, TOW-AWAY PROTECTION CONTROL UNIT (IF EQUIPPED) IRS LED IRS-OFF LEFT ENGINE HOOD CONTACT SWITCH (LEFT FRONT CORNER OF ENGINE COMPT) MULTI-FUNCTION DISPLAY NCA WIRE OFF TOWING SENSOR BUTTON 8 7 6 4 3 2 SOS LED WS LED INFO LED WS INFO SOS REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (RIGHT SIDE OF TRUNK/CARGO AREA) REAR WINDOW GLASS BREAKAGE SENSOR RED WIRE RED/BLK WIRE RED/BLU WIRE RED/GRY WIRE RIGHT INTERIOR PROTECTION TRANSMITTER RIGHT REAR WINDOW GLASS BREAKAGE SENSOR SOS SOS LED W/ ECO START/ STOP FUNCTION W/O ECO START/ STOP FUNCTION WHT WIRE WS LED YEL WIRE YEL/RED WIRE YEL/VIO WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 CAN B H CAN B L AIR RECIRCULATION MODE BUTTON AUTOMATIC AIR CONDITIONING CONTROL, OPERATING UNIT BLOWER MOTOR (C-CLASS: UNDER RIGHT SIDE OF DASH) (GLK-CLASS: RIGHT SIDE DASH) BLOWER REGULATOR A/C HOUSING BLU/BLK WIRE BRN WIRE BRN/BLK WIRE BRN/RED WIRE COMPUTER DATA LINES SYSTEM FUSE GND (-) 31 GND LIN DATA GRY/BLU WIRE HOT AT ALL TIMES HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED LEFT CENTER AIR OUTLET SYMBOL ILLUMINATION LEFT FRONT SIDE AIR OUTLET SYMBOL ILLUMINATION NCA WIRE PTC HEATER BOOSTER (2.0L TURBO DIESEL) (UPPER CENTER OF HVAC UNIT) REAR WINDOW HEATER BUTTON RED WIRE RED/BLK WIRE RED/BLU WIRE RED/VIO WIRE RED/WHT WIRE RIGHT CENTER AIR OUTLET SYMBOL ILLUMINATION RIGHT FRONT SIDE AIR OUTLET SYMBOL ILLUMINATION SIG SIG NTC SUN SENSOR (TOP CENTER OF DASH) VIO/GRN WIRE VIO/WHT WIRE W/ AIR OUTLET SYMBOL ILLUMINATION W/O ECO START/STOP FUNCTION W/ ECO START/STOP FUNCTION WHT WIRE WHT/BLU WIRE WHT/BRN WIRE YEL WIRE YEL/BLU WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 CAN B H CAN B L 30 GND 31 AIR RECIRCULATION MODE BUTTON AUTOMATIC AIR CONDITIONING CONTROL, OPERATING UNIT BLOWER MOTOR (UNDER RIGHT SIDE OF DASH) BLOWER REGULATOR A/C HOUSING BLU WIRE BLU/BLK WIRE BRN WIRE BRN/BLK WIRE BRN/RED WIRE COMPUTER DATA LINES SYSTEM DATA FUSE FUSE 43 HOT AT ALL TIMES HOT W/ CIRCUIT 15 RELAY ENERGIZED HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED REAR ENGINE COMPT) (GLK-CLASS: RIGHT REAR ENGINE COMPT) REAR SAM CONTROL UNIT W/FUSE, RELAY MODULE (C-CLASS: AT RIGHT REAR WINDOW HEATER BUTTON RED WIRE RED/BLK WIRE RED/BLU WIRE RED/VIO WIRE RED/WHT WIRE SIG SIG NTC DATA FOND GND DATA SUN SENSOR (TOP CENTER OF DASH) VIO/WHT WIRE W/O ECO START/STOP FUNCTION W/ ECO START/STOP FUNCTION WHT WIRE WHT/BLU WIRE YEL WIRE YEL/BLU WIRE

1 2 3 4 VIDEO N LVDS N VIDEO P LVDS P 2 3 1 5 6 CAN S H CAN S L 31 31 31 PNK WIRE 4 1 3 2 15 31 CAN S L CAN S H BLK WIRE BLU WIRE BRN WIRE CAN E H CAN E L CAN H H CAN H H CAN H L CAN H H CAN H L BLS H BLS_M BLS_L CAN H L CAN S H CAN S L 31 PNK WIRE CAN-G H CAN-G L CAN-S H CAN-S L COMPUTER DATA LINES SYSTEM DISTRONIC CONTROL UNIT DISTRONIC ELECTRIC CONTROLLER UNIT (CENTER OF FRONT GRILLE) DISTRONIC RADAR SENSOR ELECTRONIC STABILITY PROGRAM CONTROL UNIT (LEFT FRONT OF ENGINE COMPT) FUSE GRN WIRE GRN/WHT WIRE HOT AT ALL TIMES HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED LEFT FRONT BUMPER DISTRONIC SENSOR (DTR) LEFT REAR BUMPER INTELLIGENT RADAR SENSOR (W/ BLIND SPOT ASSIST), LEFT REAR BUMPER RADAR SENSOR (BEHIND LEFT END OF REAR BUMPER) MULTI-FUNCTION CAMERA ORG/ WIRE PNK WIRE PNK/BLU WIRE PNK/GRN WIRE PNK/WHT WIRE RED/BLU WIRE RIGHT FRONT BUMPER DISTRONIC SENSOR (DTR) RIGHT REAR BUMPER INTELLIGENT RADAR SENSOR (W/ BLIND SPOT ASSIST), RIGHT REAR BUMPER RADAR SENSOR (BEHIND RIGHT REAR END OF REAR BUMPER) VIDEO, RADAR SENSOR SYSTEM CONTROL UNIT VIO WIRE VIO/WHT WIRE

30 H SIDE ADAPTIVE DAMPING CONTROL UNIT (RIGHT FRONT FOOTWELL) BLK/BLU WIRE BLK/WHT WIRE BLU/WHT WIRE BRN WIRE BRN/RED WIRE BRN/WHT WIRE FUSE CONTROL MODULE W/ FUSE, RELAY MODULE (RIGHT SIDE OF TRUNK) GND GND GRN/WHT WIRE HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED L SIDE L SIDE SIG LEFT FRONT LEVEL SENSOR (IN LEFT FRONT WHEELWELL) LEFT REAR AXLE DAMPING VALVE UNIT LEFT REAR BODY LATERAL ACCELERATION SENSOR LEFT REAR LEVEL SENSOR (IN LEFT REAR WHEELWELL) NCA WIRE PNK/RED WIRE REAR SAM RED/BLU WIRE RIGHT REAR AXLE DAMPING VALVE UNIT RIGHT REAR LEVEL SENSOR (IN RIGHT REAR WHEELWELL) SIG SIG 31 H SIDE WHT/BLU WIRE WHT/RED WIRE YEL/WHT WIRE

1 2 CAN-B H CAN-B L 2 1 5 4 CAN B H CAN B L 30 31 AUTOMATIC AIR CONDITIONING CONTROL, OPERATING UNIT BLK WIRE BLK/WHT WIRE BRN WIRE BRN/RED WIRE COMPUTER DATA LINES SYSTEM FUSE GRY WIRE HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED LEFT OUTSIDE MIRROR MIRROR HEATER REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (RIGHT SIDE OF TRUNK/ CARGO AREA) REAR WINDOW HEATER BUTTON RED WIRE RED/GRY WIRE RED/WHT WIRE RIGHT OUTSIDE MIRROR WHT WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 CAN-E L CAN-E H 31 30 1 2 ALDW+ ALDW- 1 2 LH+ LH- 1 2 NTC + NTC - 2 3 GND LSP- 2 3 LSP+ GND BACK, VOICE CONTROL SYSTEM OFF BUTTON BEAM SWITCH BLK WIRE BLU WIRE BRN WIRE CENTER HORNS BUTTON COMBINATION SWITCH COMPUTER DATA LINES SYSTEM CRUISE CONTROL LEVER DECELERATE, SET SWITCH RESUME FROM MEMORY SWITCH ACCELERATE, SET SWITCH DISTRONIC CONTROL (IF EQUIPPED) FANFARE HORNS, AIR BAG CLOCK SPRING CONTACT FRONT SAM CONTROL UNIT W/ FUSE CONTROL UNIT W/ FUSE/RELAY MODULE (RIGHT SIDE OF TRUNK) FUSE FUSE/RELAY MODULE (LEFT REAR OF ENGINE COMPT) GRN WIRE GRN/WHT WIRE GRY/BLU WIRE HEATING ELEMENT TEMPERATURE SENSOR HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED INDICATOR SWITCH LEFT FANFARE HORN SYSTEM BUTTON LEFT MULTI-FUNCTION STEERING WHEEL BUTTON GROUP LH+/ALDW+ LH-/ALDW- MUTE BUTTON OFF SWITCH OK BUTTON ORG/ WIRE PNK MUTE WIRE REAR SAM RED WIRE RED/BLU WIRE RED/ORG WIRE RIGHT FANFARE HORN SYSTEM BUTTON RIGHT MULTI-FUNCTION STEERING WHEEL BUTTON GROUP SCROLL FORWARD/ BACK BUTTON STEERING ANGLE SENSOR STEERING COLUMN ADJUSTMENT SWITCH STEERING COLUMN MODULE CONTROL UNIT (TOP OF STEERING COLUMN) STEERING WHEEL ELECTRONICS STEERING WHEEL HEATER STEERING WHEEL HEATER HEATING ELEMENT STEERING WHEEL VIBRATION MOTOR (W/ AUTOMATIC LANE DETECTION) SUPPLEMENTAL RESTRAINTS SYSTEM SYSTEM SELECTION BUTTON TEL TURN SIGNAL LAMP SWITCH HEADLAMP FLASHER/HIGH BEAM SWITCH LOW VIO WIRE VOICE CONTROL SYSTEM ON BUTTON W/ STEERING WHEEL HEATER, AUTOMATIC LANE DETECTION WINDSHIELD WASHER SYSTEM SWITCH WIPE SWITCH YEL WIRE

1 2 CAN-B H CAN-B L 2 HS AUTOMATIC AIR CONDITIONING CONTROL, OPERATING UNIT BLK WIRE BRN WIRE BRN/RED WIRE CAN B L CAN B H COMPUTER DATA LINES SYSTEM COUPE FUSE HEATED REAR WINDOW RELAY HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED REAR SAM CONTROL UNIT W/ FUSE, RELAY MODULE (RIGHT SIDE OF TRUNK/CARGO AREA) REAR WINDOW ANTENNA AMPLIFIER 1 (IF EQUIPPED) (CENTER REAR OF ROOF) REAR WINDOW HEATER REAR WINDOW HEATER BUTTON REAR WINDOW INTERFERENCE SUPPRESSION CAPACITOR 1 REAR WINDOW INTERFERENCE SUPPRESSION CAPACITOR 1 (SEDAN) REAR WINDOW INTERFERENCE SUPPRESSION CAPACITOR 2 RED WIRE VIO/WHT WIRE W/O ECO START/ STOP FUNCTION W/ ECO START/ STOP FUNCTION

15 SIG 30 30 (+) 31 SIG 58 SL-L SL-R (+) PNK WIRE 7 8 9 10 11 12 13 14 (+) ANST ZV ANT BSL-R ANTI-THEFT SYSTEM SOUND SYSTEMS SEATS SYSTEM SUPPLEMENTAL BLK WIRE BLK/BLU WIRE BLK/BRN WIRE BLK/GRN WIRE BLK/GRY WIRE BLK/RED WIRE BLK/VIO WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/BRN WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/VIO WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE BRN/BLU WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/PNK WIRE BRN/RED WIRE BRN/YEL WIRE BSL-R BSL-L ZV CAN B H CAN B L 31 31 31 31 CAN B L CAN B H (+) (+) SIG LIN COMPUTER DATA LINES SYSTEM DEFOGGER SYSTEM DOOR LOCKS SYSTEM ENGINE CONTROLS SYSTEM EXTERIOR LIGHTS SYSTEM ANTI-THEFT SYSTEM EXTERIOR LIGHTS SYSTEM EXTERIOR LIGHTS SYSTEM TRUNK, TAILGATE, FUEL DOORS SYSTEM EXTERIOR LIGHTS SYSTEM INTERIOR LIGHTS SYSTEM FRONT ELECTRICAL PREFUSE BOX (AT RIGHT REAR OF ENGINE COMPT) FUSE FUSE 164 GRN WIRE GRN/BLU WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/BLU WIRE GRY/PNK WIRE GRY/VIO WIRE GRY/YEL WIRE HFE HFE SIG SIG SIG HOT AT ALL TIMES HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED INSTRUMENT CLUSTER SYSTEM POWER DISTRIBUTION SYSTEM INSTRUMENT CLUSTER, ANTI-THEFT SYSTEMS INSTRUMENT CLUSTER, ANTI-THEFT SYSTEMS INSTRUMENT CLUSTER, ANTI-THEFT SYSTEMS PNK BSL-L WIRE PNK/RED WIRE POWER DISTRIBUTION SYSTEM REAR SAM CONTROL UNIT W/ FUSE, RELAY MODULE (RIGHT SIDE OF TRUNK/CARGO AREA) RED WIRE RED/BLK WIRE RED/BLU WIRE RED/GRN WIRE RED/GRY WIRE RED/VIO WIRE RED/WHT WIRE RED/YEL WIRE RFL-R RFL-L NSL-R NSL-L RSS EIN RSS AUS SEATS SYSTEM SEATS SYSTEM SUPPLEMENTAL RESTRAINTS SYSTEM SIG SIG SIG SIG SOUND SYSTEMS SOUND SYSTEMS SEATS SYSTEM SUPPLEMENTAL RESTRAINTS SYSTEM TRUNK, TAILGATE, FUEL DOORS SYSTEM TRUNK, TAILGATE, FUEL DOORS SYSTEM STARTING/CHARGING SYSTEM VIO/BLU WIRE VIO/WHT WIRE W/O ECO START/STOP FUNCTION WHT/BLU WIRE WHT/YEL WIRE WIPER/WASHER SYSTEM WIPER/WASHER SYSTEM SOUND SYSTEMS EXTERIOR LIGHTS SYSTEM YEL 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