Mercedes-Benz A-class W177 (2018-2023) (front of left front wheelwell) Wiring diagrams

BLK/RED WIRE BLU WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE COMPUTER DATA LINES SYSTEM COOLANT TEMPERATURE SENSOR COOLANT THERMOSTAT HEATING ELEMENT DRIVETRAIN CONTROL UNIT ENGINE COMPARTMENT FUSE, RELAY MODULE ENGINE COMPARTMENT PREFUSE BOX FAN MOTOR (BEHIND RADIATOR) FINE PARTICLE SENSOR FUSE 103 FUSE 118 FUSE 14 FUSE 143 FUSE 166 FUSE 27 FUSE 41 FUSE 53 FUSE 54 GRN WIRE GRN/VIO WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/BLK WIRE GRY/YEL WIRE HOT AT ALL TIMES HOT W/ HOT W/ BATTERY DISCONNECT SWITCH RELAY ENERGIZED ME-SFI (ME) CONTROL UNIT NCA WIRE POWER SUPPLY POTENTIAL DISTRIBUTOR 3 RED WIRE RED/BLU WIRE RED/GRN WIRE RED/VIO WIRE RELAY ENERGIZED SIG SIG GND VEHICLE INTERIOR FUSE, RELAY MODULE YEL/GRN WIRE

ALTERNATOR BATTERY DISCONNECT SWITCH RELAY BATTERY SENSOR BLK WIRE BLU/WHT WIRE BRN WIRE BRN/RED WIRE CAN B H STERN CAN B L CAN C H CAN C L CAN HMI H CAN HMI L CENTRAL CONTROL MODULE COMPUTER DATA LINES SYSTEM ENGINE COMPARTMENT PREFUSE BOX FUSE 2 GRN/WHT WIRE INSTRUMENT CLUSTER CONTROL UNIT LIN ME-SFI (ME) CONTROL UNIT NCA WIRE ON-BOARD ELECTRICAL SYSTEM BATTERY RED WIRE RED/WHT WIRE STARTER BATTERY PREFUSE BOX STARTER, ALTERNATOR CABLE CONNECTOR STARTING CIRCUIT VIO WIRE VIO/WHT WIRE WHT WIRE

BLK WIRE BLK/RED WIRE BLK/WHT WIRE BLU WIRE BLU/BLK WIRE BLU/WHT WIRE BRN WIRE CAN H H CAN H L COMPUTER DATA LINES SYSTEM ELECTRONIC STABILITY PROGRAM CONTROL UNIT ENGINE COMPARTMENT FUSE, RELAY MODULE FLEX-E BM FLEX-E BP FLEX-E BP PNK FLEX-E BM WIRE FUSE 107 FUSE 110 FUSE 41 FUSE 47 FUSE 70 GRN WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE GRY/BLU WIRE GRY/WHT WIRE HOT W/ BATTERY DISCONNECT SWITCH RELAY ENERGIZED HOT W/ ENGINE COMPARTMENT TERMINAL 15 RELAY ENERGIZED INTELLIGENT DRIVE CONTROL UNIT (UNDER FRONT PASSENGER SEAT) ME-SFI (ME) CONTROL UNIT MOT- PNK WIRE RED WIRE RED/GRN WIRE RED/ORG WIRE RED/YEL WIRE SENS (+) SENS GND SENS 1 SENS 2 SIG GND STEERING COLUMN MODULE CONTROL UNIT STOP LAMP SWITCH THROTTLE VALVE ACTUATOR VEHICLE INTERIOR FUSE, RELAY MODULE WHT WIRE YEL WIRE

ADAPTIVE DAMPING SYSTEM CONTROL UNIT BACKUP RELAY BRN WIRE BRN/WHT WIRE CENTER STOP LAMP CIRCUIT 31 POTENTIAL DISTRIBUTOR 1 DRIVE UNIT CONTROL UNIT ENGINE COMPARTMENT FUSE, RELAY MODULE INNER LEFT REAR LAMP UNIT INNER RIGHT REAR LAMP UNIT LEFT FANFARE HORN LEFT LICENSE PLATE LAMP LEFT LOAD COMPARTMENT LAMP LEFT OUTER REAR INTEGRATED RADAR SENSOR LEFT OUTER REAR RADAR SENSOR LEFT REAR LAMP UNIT LEFT REAR PASSENGER COMPARTMENT BACKREST LOCK MICROSWITCH LIFTGATE AMBIENT LAMP, WARNING LAMP LUGGAGE COMPARTMENT SOCKET NCA WIRE REAR AXLE DIFFERENTIAL DRIVE UNIT REAR CAMERA COVER MOTOR REAR WINDOW GLASS BREAKAGE SENSOR RIGHT LICENSE PLATE LAMP RIGHT OUTER REAR INTEGRATED RADAR SENSOR RIGHT OUTER REAR RADAR SENSOR RIGHT REAR PASSENGER COMPARTMENT BACKREST LOCK MICROSWITCH TAILGATE WIPER MOTOR TANK CAP CENTRAL LOCKING ACTUATOR TRAILER HITCH SWITCH TRUNK LID/LIFTGATE EXTERNAL OPERATION BUTTON TRUNK LID/LIFTGATE LOCK W/ INTERIOR MONITORING

BATTERY SENSOR BRN WIRE CARSHARING CONTROL UNIT CELLULAR TELEPHONE SYSTEM ANTENNA AMPLIFIER/ COMPENSATOR CENTER AIR VENT AMBIANCE ILLUMINATION ELECTRICAL POWER STEERING CONTROL UNIT ELECTRONIC IGNITION SWITCH CONTROL UNIT FAN MOTOR FRONT PASSENGER SEAT HEAD RESTRAINT AMBIANCE ILLUMINATION INTELLIGENT DRIVE CONTROL UNIT LEFT CENTER AIR VENT AMBIANCE ILLUMINATION ME-SFI (ME) CONTROL UNIT NCA WIRE PERIPHERALS CAN (CAN PER) POTENTIAL DISTRIBUTOR ELECTRICAL CONNECTOR RIGHT CENTER AIR VENT AMBIANCE ILLUMINATION RIGHT FRONT FOOTWELL AMBIANCE ILLUMINATION RIGHT REAR FOOTWELL AMBIANCE ILLUMINATION RIGHT REAR SEAT HEAD RESTRAINT AMBIANCE ILLUMINATION SPECIAL-PURPOSE VEHICLE MULTI-FUNCTION CONTROL UNIT W/ ELECTRONIC INTERFACE W/ SEAT MODEL VARIANT 3 W/ WIRELESS PHONE CHARGING W/O SEAT MODEL VARIANT 3

BRN WIRE BRN/RED WIRE CAN B H CAN B H STERN CAN B L CAN LR H CAN LR L CENTRAL CONTROL MODULE COMPUTER DATA LINES SYSTEM ELECTRONIC IGNITION SWITCH CONTROL UNIT ENGINE COMPARTMENT FUSE, RELAY MODULE FLEX-E BP PNK FLEX-E BM WIRE FUSE 110 FUSE 21 GRN WIRE HORNS CONTACT PLATE HOT AT ALL TIMES LEFT FANFARE HORN NCA WIRE RED WIRE RED/ORG WIRE RIGHT FANFARE HORN SIG STEERING COLUMN MODULE CONTROL UNIT STEERING WHEEL ELECTRONICS VEHICLE INTERIOR FUSE, RELAY MODULE YEL WIRE YEL/GRY WIRE

BATTERY SENSOR BATTERY TERMINAL PYROFUSE BLK WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/RED WIRE CAN B H CAN B L CAN C H CAN C L CENTRAL CONTROL MODULE CHARGING CIRCUIT CIRCUIT 50 RELAY COMPUTER DATA LINES COMPUTER DATA LINES SYSTEM ELECTRONIC IGNITION SWITCH CONTROL UNIT ENGINE COMPARTMENT FUSE, RELAY MODULE FLEX-E BM FLEX-E BP FUSE 73 FUSE 75 GRN WIRE GRN/WHT WIRE HOT W/ ENGINE COMPARTMENT TERMINAL 15 RELAY ENERGIZED LIN ME-SFI (ME) CONTROL UNIT NCA WIRE ON-BOARD ELECTRICAL SYSTEM BATTERY ORG/ WIRE PNK WIRE RED WIRE RED/WHT WIRE REL (+) REL GND SIG (1) SIG (2) START/STOP BUTTON STARTER STARTER, ALTERNATOR CABLE CONNECTOR STEERING COLUMN MODULE CONTROL UNIT STERN SYSTEM VIO/WHT WIRE VIO/YEL WIRE VOLTAGE DIP LIMITER WHT WIRE YEL/RED WIRE

BLK WIRE BLK/VIO WIRE BLU WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE BRN/YEL WIRE CAN C H CAN C L CHARGE AIR COOLER CIRCULATION PUMP COMPUTER DATA LINES SYSTEM CRASH GASOLINE PARTICULATE FILTER DIFFERENTIAL PRESSURE SENSOR GRN WIRE GRN/BLU WIRE GRN/WHT WIRE GRY/BLU WIRE LIN LOWER RADIATOR TRIM FLAP ACTUATOR MOTOR ME-SFI (ME) CONTROL UNIT ORG/BLU WIRE PUMP (+) HEAT GND PUMP GND RED WIRE RED/BLU WIRE RED/GRN WIRE RED/GRY WIRE RED/WHT WIRE REL (+) REL GND SIG STARTING/ CHARGING SYSTEM SUPPLEMENTAL RESTRAINTS SYSTEM TEMPERATURE SENSOR UPSTREAM OF GASOLINE PARTICULATE FILTER TRANSMISSION OIL COOLING COOLANT CIRCULATION PUMP UPPER RADIATOR TRIM FLAP ACTUATOR MOTOR VALVE GND VIO/WHT WIRE WHT WIRE WHT/BLU WIRE WHT/YEL WIRE YEL/BLU WIRE YEL/RED WIRE

BLK WIRE BLK/BLU WIRE BLK/GRN WIRE BLK/RED WIRE BLK/WHT WIRE BLK/YEL WIRE BLU/RED WIRE BLU/VIO WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE BRN/BLK WIRE BRN/WHT WIRE CIRCUIT 31 POTENTIAL DISTRIBUTOR 1 CIRCUIT 31 POTENTIAL DISTRIBUTOR 2 CYLINDER 2 FUEL INJECTOR CYLINDER IGNITION COIL 1 CYLINDER IGNITION COIL 2 CYLINDER IGNITION COIL 3 CYLINDER IGNITION COIL 4 ENGINE OIL FILL LEVEL SENSOR GRN/WHT WIRE GRN/YEL WIRE GRY/RED WIRE GRY/YEL WIRE KNOCK SENSOR 1 POWER SUPPLY POTENTIAL DISTRIBUTOR 1 QUANTITY CONTROL VALVE RED WIRE RED/BLU WIRE RED/GRN WIRE RED/YEL WIRE VENT LINE CONTACT SWITCH 1 VIO/GRY WIRE VIO/RED WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/BRN WIRE WHT/RED WIRE WHT/YEL WIRE YEL/WHT WIRE