Mercedes-Benz B-class W246 facelift (2014-2018) nca Wiring diagrams

BLK WIRE BLK/YEL WIRE BLU/YEL WIRE BRN WIRE BRN/BLK WIRE BRN/RED WIRE CAN B H CAN B L COMPUTER DATA LINES SYSTEM ELECTRIC REFRIGERANT COMPRESSOR ENGINE CONTROLS SYSTEM FRONT ELECTRICAL PREFUSE BOX FUSE 5 GRN/BLK WIRE GRN/BRN WIRE GRN/ORG WIRE GRN/RED WIRE GRN/YEL WIRE HIGH-VOLTAGE DISCONNECT DEVICE HIGH-VOLTAGE POWER DISTRIBUTOR HIGH-VOLTAGE PTC HEATER HOT AT ALL TIMES HUMIDITY/ TEMPERATURE SENSOR HV- INTERIOR TEMPERATURE SENSOR W/ INTEGRATED FAN LIGHT SENSOR (-) LIN 1 LIN 1 IP NCA WIRE ORG/ WIRE ORG/BLU WIRE ORG/GRN WIRE ORG/RED WIRE OUTSIDE TEMPERATURE SENSOR OVERHEAD CONTROL PANEL CONTROL UNIT POT POT POT PRE AIR CONDITIONING BUTTON RAIN SENSOR RAIN/LIGHT SENSOR (W/ RAIN SENSOR) LIGHT SENSOR (W/O RAIN SENSOR) RED WIRE RED/BLK WIRE RED/BRN WIRE S- SHD SAM CONTROL UNIT (LEFT END OF DASH) SHD SIG UPPER CONTROL PANEL CONTROL UNIT YEL WIRE

BLK WIRE BLK/GRY WIRE BLK/YEL WIRE BLU WIRE BLU/YEL WIRE BRN WIRE BRN/GRN WIRE BRN/RED WIRE CAN B H CAN B L COMPUTER DATA LINES SYSTEM DRIVER SEAT AMBIANCE ILLUMINATION DRIVER SEAT CONTROL UNIT (UNDER DRIVER SEAT) DRIVER SIDE BAG SQUIB FOOTWELL ILLUMINATION DIODE 1 FOOTWELL ILLUMINATION DIODE 2 FOOTWELL ILLUMINATION SWITCH GRN WIRE GRN/PNK WIRE GRN/WHT WIRE GRN/YEL WIRE GROUND DISTRIBUTION SYSTEM GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/WHT WIRE INSTRUMENT ILLUMINATION CIRCUIT LEFT FRONT ILLUMINATED DOOR SILL MOLDING LEFT REAR DOOR AMBIANCE ILLUMINATION LEFT REAR DOOR DOOR HANDLE ILLUMINATION LEFT REAR DOOR LOCK LEFT REAR DOOR ROTARY TUMBLER SWITCH LEFT REAR FOOTWELL LAMP NCA WIRE ORG/ WIRE PNK/WHT WIRE POWER DISTRIBUTION SYSTEM RED/BLK WIRE RED/GRN WIRE RIGHT FRONT ILLUMINATED DOOR SILL MOLDING RIGHT REAR DOOR AMBIANCE ILLUMINATION RIGHT REAR DOOR DOOR HANDLE ILLUMINATION RIGHT REAR DOOR LOCK RIGHT REAR DOOR ROTARY TUMBLER SWITCH VIO/BLU WIRE W/O SEAT AMBIANCE ILLUMINATION W/ SEAT AMBIANCE ILLUMINATION WHT WIRE YEL WIRE YEL/BLU WIRE

BLK/VIO WIRE BLU/YEL WIRE BRN WIRE BRN/BLU WIRE BRN/PNK WIRE BRN/RED WIRE BRN/WHT WIRE CAN B H CAN B L COMPUTER DATA LINES SYSTEM GRN WIRE GRN/GRY WIRE GRY/WHT WIRE LEFT FRONT DOOR AMBIANCE ILLUMINATION LEFT FRONT DOOR CONTROL UNIT LEFT FRONT DOOR EXIT, WARNING LAMP LEFT FRONT DOOR HANDLE ILLUMINATION LEFT FRONT DOOR LOCK LEFT FRONT DOOR ROTARY TUMBLER SWITCH LEFT REAR READING LAMP LEFT REAR READING LAMP SWITCH NCA WIRE REAR AMBIENT LAMP REAR DOME LAMP REAR DOME LAMP (W/ READING LAMPS) RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE RIGHT FRONT DOOR AMBIANCE ILLUMINATION RIGHT FRONT DOOR CONTROL UNIT RIGHT FRONT DOOR EXIT, WARNING LAMP RIGHT FRONT DOOR HANDLE ILLUMINATION RIGHT FRONT DOOR LOCK RIGHT FRONT DOOR ROTARY TUMBLER SWITCH RIGHT REAR READING LAMP RIGHT REAR READING LAMP SWITCH SIG W/ EXTERIOR LIGHT, VISION PACKAGE W/O EXTERIOR LIGHT, VISION PACKAGE WHT WIRE

BATTERY MANAGEMENT SYSTEM CONTROL UNIT BRN WIRE BRN/RED WIRE CAMERA COVER CONTROL UNIT CAN B H CAN B L CAN EL H CAN EL L CAN I H CAN I L CAN L H CAN L L CAN-EL L LV CHARGER CONTROL UNIT DC/DC CONVERTER CONTROL UNIT DRIVETRAIN SENSOR CAN (CAN I) POTENTIAL DISTRIBUTOR ELECTRICAL CONNECTOR ELECTRIC DRIVE CAN (CAN EL) POTENTIAL DISTRIBUTOR ELECTRICAL CONNECTOR 1 ELECTRIC DRIVE CAN (CAN EL) POTENTIAL DISTRIBUTOR ELECTRICAL CONNECTOR 2 ELECTRIC DRIVE CAN (CAN EL) POTENTIAL DISTRIBUTOR ELECTRICAL CONNECTOR 3 ELECTRIC VEHICLE SOUND GENERATOR EMERGENCY CALL SYSTEM CONTROL UNIT GATEWAY FOR POWERTRAIN CONTROL UNIT HYBRID CAN (CAN L) POTENTIAL DISTRIBUTOR ELECTRICAL CONNECTOR ME-SFI (ME) CONTROL UNIT NCA WIRE NOX SENSOR CONTROL UNIT PARK PAWL CONTROL UNIT POWER ELECTRONICS CONTROL UNIT RED/YEL WIRE TELEMATICS SERVICES COMMUNICATION MODULE THERMAL MANAGEMENT CONTROL UNIT TRUNK LID/ LIFTGATE CONTROL UNIT DRIVETRAIN CONTROL UNIT W/ EMERGENCY CALL SYSTEM W/O EMERGENCY CALL SYSTEM WHT WIRE WHT/RED WIRE YEL WIRE YEL/BLK WIRE YEL/GRY WIRE YEL/RED WIRE

BLU WIRE BLU/BRN WIRE BLU/ORG WIRE BLU/VIO WIRE BLU/WHT WIRE BRAKE FLUID LEVEL SWITCH BRAKE SYSTEM WARNING LAMP BRN 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 DRIVER SEAT BELT BUCKLE RESTRAINT SYSTEM SWITCH ELECTRIC PARKING BRAKE CONTROL UNIT ELECTRIC PARKING BRAKE SWITCH ENGINE COMPARTMENT FUSE, RELAY MODULE FUSE 23 FUSE 236 FUSE 38 FUSE 73 FUSE 88 GRN WIRE GRN/BLK WIRE GRN/BLU WIRE GRN/GRY WIRE GRN/ORG WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/BLU WIRE HOT AT ALL TIMES HOT W/ CIRCUIT INSTRUMENT CLUSTER LEFT FRONT DOOR CONTROL UNIT LEFT FRONT DOOR LOCK LEFT FRONT DOOR ROTARY TUMBLER SWITCH MULTI-FUNCTION DISPLAY NCA WIRE ORG/BLU WIRE PARKING BRAKE INDICATOR LAMP RED WIRE RED/BLK WIRE RED/GRN WIRE RED/YEL WIRE RIGHT FRONT BRAKE WEAR SENSOR SAM CONTROL UNIT SEAT BELT WARNING LAMP SIG SUPPLEMENTAL RESTRAINT SYSTEM CONTROL UNIT SW 1 SW 3 SW 4 SW 6 VEHICLE INTERIOR FUSE BOX YEL WIRE

BLK/GRY WIRE BRN WIRE BRN/BLK WIRE BRN/YEL WIRE CAN E H CAN E L COMPUTER DATA LINES SYSTEM ELECTRIC PARKING BRAKE CONTROL UNIT ELECTRIC PARKING BRAKE SWITCH FUSE 73 FUSE 74 FUSE 93 GRN WIRE GRN/BLK WIRE GRN/BLU WIRE GRN/GRY WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/BLU WIRE HOT AT ALL TIMES HOT W/ CIRCUIT 15 RELAY ENERGIZED LEFT ELECTRIC PARKING BRAKE ACTUATOR MOTOR MOTOR NCA WIRE RED WIRE RED/BLK WIRE RED/GRN WIRE RED/YEL WIRE RIGHT ELECTRIC PARKING BRAKE ACTUATOR MOTOR SW 1 SW 3 SW 4 SW 6 VEHICLE INTERIOR FUSE BOX

BLK WIRE BLU/BLK WIRE BRN WIRE BRN/RED WIRE BRN/YEL WIRE CAN B H CAN B L CENTRAL LOCKING MOTOR CLA CLASS, GLA CLASS COMPUTER DATA LINES SYSTEM DRIVER TRUNK LID/ LIFTGATE CONTROL BUTTON FUEL FILLER/ SOCKET FLAP CENTRAL LOCKING ACTUATOR FUSE 23 FUSE 78 GRN WIRE GRN/BLK WIRE GRN/WHT WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/PNK WIRE HOT AT ALL TIMES LEFT FRONT DOOR CONTROL MODULE MOT- NCA WIRE ORG/ WIRE ORG/GRN WIRE RED WIRE RED/BLK WIRE S SIG SAM CONTROL UNIT (LEFT END OF DASH) SIG S_SIG TRUNK LID EMERGENCY OPENING SWITCH TRUNK LID RELEASE BUTTON TRUNK LID/ LIFTGATE CONTROL BUTTON TRUNK LID/ LIFTGATE CONTROL ELECTRIC MOTOR TRUNK LID/ LIFTGATE CONTROL HALL SENSOR TRUNK LID/LIFTGATE CENTRAL LOCKING MOTOR TRUNK LID/LIFTGATE CONTROL DRIVE UNIT TRUNK LID/LIFTGATE CONTROL UNIT TRUNK LID/LIFTGATE CONTROL WARNING BUZZER TRUNK LID/LIFTGATE EXTERNAL OPERATION SWITCH TRUNK LID/LIFTGATE LOCKING ELEMENT TRUNK LID/LIFTGATE LOCKING PAWL SWITCH TRUNK LID/LIFTGATE ROTARY TUMBLER SWITCH VEHICLE INTERIOR FUSE BOX VIO WIRE VIO/BRN WIRE VIO/YEL WIRE YEL/BLK WIRE YEL/BLU WIRE YEL/GRN WIRE

BLK WIRE BLK/GRY WIRE BLU/YEL WIRE BRN WIRE BRN/BLU WIRE BRN/RED WIRE CAN B H CAN B L CAN E H CAN E L COMBINATION SWITCH COMPUTER DATA LINES SYSTEM DECOUPLING RELAY FRONT ELECTRICAL PREFUSE BOX FUSE 239 FUSE 32 FUSE 56 FUSE 82 FUSE 96 GRN WIRE GRN/BRN WIRE GRN/ORG WIRE GRN/RED WIRE GRN/WHT WIRE GRY WIRE HOT AT ALL TIMES HOT W/ CIRCUIT INSTRUMENT CLUSTER LIFTGATE WINDSHIELD WASHER SYSTEM SWITCH MOT- NCA WIRE ORG/GRN WIRE OVERHEAD CONTROL PANEL UNIT RAIN/LIGHT SENSOR (W/ RAIN SENSOR) LIGHT SENSOR (W/O RAIN SENSOR) REAR WINDOW WIPER RELAY RED WIRE RED/BLU WIRE RED/VIO WIRE RED/WHT WIRE SAM CONTROL UNIT (LEFT END OF DASH) SIG SPRAY NOZZLE HEATER SPRAY NOZZLE HOSE HEATER STEERING COLUMN MODULE CONTROL UNIT TAILGATE WIPER MOTOR VEHICLE INTERIOR FUSE BOX VIO WIRE WINDSHIELD WASHER SYSTEM PUMP WINDSHIELD WASHER SYSTEM SWITCH WINDSHIELD WASHER SYSTEM WASHER FLUID LEVEL SWITCH WINDSHIELD WIPER ON/OFF RELAY WIPER LEVEL 1/2 RELAY WIPER MOTOR WIPER SWITCH WMV A/D WMV PP WMV WS YEL/GRN WIRE YEL/VIO WIRE

BLK WIRE BLK/BLU WIRE BLK/YEL WIRE BLU/YEL WIRE CAN EL H CAN EL L COMPUTER DATA ELECTRIC MACHINE ELECTRIC MACHINE ROTOR POSITION SENSOR ELECTRIC REFRIGERANT COMPRESSOR (LOWER LEFT FRONT OF DRIVE MODULE ASSEMBLY) ENC A ENC B HV- LINES SYSTEM NCA WIRE ORG/ WIRE ORG/RED WIRE ORG/VIO WIRE POT PRX RED/BLK WIRE RED/BRN WIRE RED/WHT WIRE RED/YEL WIRE SHD SUPPLEMENTAL RESTRAINT SYSTEM CONTROL UNIT WHT/GRY WIRE WHT/RED WIRE YEL WIRE

50 RELAY (DIAGRAM 2 OF 7) BLK/RED WIRE BLU WIRE BLU/BRN WIRE BLU/GRN WIRE BLU/YEL WIRE BRN WIRE BRN/RED WIRE CAN B H CAN B L COMPUTER DATA LINES SYSTEM COOLANT TEMPERATURE SENSOR DOWNSTREAM OF HIGH-VOLTAGE BATTERY COOLANT TEMPERATURE SENSOR UPSTREAM OF HIGH-VOLTAGE BATTERY COOLANT TEMPERATURE WARNING LAMP DEFOGGER SYSTEM DRIVE COOLANT TEMPERATURE SENSOR ENGINE COMPARTMENT FUSE, RELAY MODULE ENGINE DIAGNOSIS INDICATOR LAMP FROM CIRCUIT 15 RELAY (UNLATCHED) (DIAGRAM 2 OF 7) FROM STARTER CIRCUIT FUSE 206 FUSE 210 FUSE 212 FUSE 213 FUSE 214 FUSE 215 GRN WIRE GRN/BLU WIRE HEATING ELEMENT HIGH-VOLTAGE BATTERY COOLANT CIRCUIT HEATING ELEMENT INSTRUMENT CLUSTER MULTIFUNCTION DISPLAY N/A NCA WIRE ORG/ WIRE POT POWER DISPLAY POWER INDICATOR RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE RES FUSE 209 SIG TEMPERATURE SENSOR THERMAL MANAGEMENT CONTROL UNIT (BEHIND REAR OF LEFT CARGO AREA TRIM PANEL) VIO WIRE WHT/BLU WIRE WHT/GRY WIRE WHT/RED WIRE WHT/YEL WIRE YEL WIRE YEL/BLU WIRE YEL/BRN WIRE