Mercedes-Benz A-class W177 (2018-2023) hot w/ battery disconnect switch relay energized Wiring diagrams

BLK WIRE BLK/BLU WIRE BLK/RED WIRE BLK/VIO WIRE BLU WIRE BLU/BLK WIRE BLU/BRN WIRE BLU/YEL WIRE BRAKE FLUID LEVEL SWITCH BRN WIRE BRN/BLK WIRE BRN/WHT WIRE BRN/YEL WIRE CAN H H CAN H L CENTRAL CONTROL MODULE COMPUTER DATA LINES SYSTEM ELECTRONIC STABILITY PROGRAM CONTROL UNIT ENGINE COMPARTMENT FUSE, RELAY MODULE EXTERIOR LIGHTS, ELECTRIC PARKING BRAKE SWITCH GROUP FLEX-E BM FLEX-E BP FUSE 23 FUSE 24 FUSE 65 FUSE 72 GRN WIRE GRN/BLK WIRE GRN/BLU WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE GRY/BLU WIRE GRY/WHT WIRE HOT W/ BATTERY DISCONNECT SWITCH RELAY ENERGIZED MOT GND/(+) MOT GND/(+) 31 PNK WIRE PNK/GRN WIRE PNK/RED WIRE RED/BLK WIRE RED/BLU WIRE RED/YEL WIRE RIGHT FRONT BRAKE WEAR SENSOR SIG SIG (+) 52 SIG (1) SIG (2) SIG 3 SIG 4 SIG GND VIO WIRE W/ ENGINE COMPARTMENT TERMINAL 15 RELAY ENERGIZED WHT WIRE WHT/YEL WIRE YEL WIRE

ACTIVE BRAKE ASSIST CONTROLLER UNIT BLK/RED WIRE BRN WIRE CAN HMI H CAN HMI L COMPUTER DATA LINES SYSTEM ENGINE COMPARTMENT FUSE, RELAY MODULE FLEX-E BM FUSE 111 FUSE 70 GRN WIRE HOT W/ BATTERY DISCONNECT SWITCH RELAY ENERGIZED HOT W/ ENGINE COMPARTMENT TERMINAL 15 RELAY ENERGIZED INSTRUMENT CLUSTER CONTROL UNIT PNK FLEX-E BP WIRE RED WIRE VEHICLE INTERIOR FUSE, RELAY MODULE VIO WIRE VIO/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

BLK/BLU WIRE BLK/VIO WIRE BLU WIRE BRN WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/ORG WIRE BRN/RED WIRE CAN B H CAN B L COMPUTER DATA LINES SYSTEM DRIVER DOOR CONTROL UNIT (IN DRIVER FRONT DOOR) DRIVER SEAT ADJUSTMENT SWITCH GROUP DRIVER SEAT BACKREST INCLINATION ADJUSTMENT MOTOR, HALL SENSOR DRIVER SEAT CONTROL UNIT DRIVER SEAT FORE/AFT ADJUSTMENT MOTOR, HALL SENSOR DRIVER SEAT HEIGHT ADJUSTMENT MOTOR, HALL SENSOR DRIVER SEAT INCLINATION ADJUSTMENT MOTOR, HALL SENSOR FLEX-E BP FLEX-E BM PNK WIRE FUSE 136 FUSE 156 FUSE 164 GRN WIRE GRN/ORG WIRE GRY WIRE GRY/BLU WIRE HOT W/ BATTERY DISCONNECT SWITCH RELAY ENERGIZED MOT (+)/GND CAN-B H MOT GND/(+) ORG/ WIRE RED WIRE RED/GRN WIRE RED/GRY WIRE RED/ORG WIRE RED/VIO WIRE RED/WHT WIRE SEATS SYSTEM SENS SENS GND SIG SIG GND STEERING COLUMN MODULE CONTROL UNIT VEHICLE INTERIOR FUSE, RELAY MODULE VIO WIRE WHT/ORG WIRE

ADAPTIVE DAMPING SYSTEM CONTROL UNIT BLK WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/WHT WIRE BRN WIRE COMPUTER DATA LINES SYSTEM FLEX-E BM FLEX-E BP FUSE 114 GRN WIRE GRN/GRY WIRE GRN/YEL WIRE GRY WIRE HOT W/ BATTERY DISCONNECT SWITCH RELAY ENERGIZED LEFT FRONT AXLE DAMPING VALVE UNIT LEFT FRONT LEVEL SENSOR LEFT REAR AXLE DAMPING VALVE UNIT LEFT REAR LEVEL SENSOR NCA WIRE ORG/ WIRE PNK WIRE RED/VIO WIRE RIGHT FRONT AXLE DAMPING VALVE UNIT RIGHT FRONT LEVEL SENSOR RIGHT REAR AXLE DAMPING VALVE UNIT RIGHT REAR LEVEL SENSOR SIG SIG (+) VLV H VEHICLE INTERIOR FUSE, RELAY MODULE VIO WIRE VLV H VLV L WHT WIRE WHT/YEL WIRE YEL WIRE YEL/BLK WIRE YEL/GRN WIRE

AUDIO H AUDIO L+ BLK WIRE BLK/BLU WIRE BLK/WHT WIRE BLU WIRE BRN WIRE CAN A H CAN A L CAN H H CAN H L CAN HMI H CAN HMI L COMPUTER DATA LINES SYSTEM ELECTRONIC STABILITY PROGRAM CONTROL UNIT ETH (+) WAKE UP ETH (-) ETHERNET EXTERIOR LIGHTS, ELECTRIC PARKING BRAKE SWITCH GROUP FUSE 111 FUSE 145 FUSE 158 FUSE 168 GRN WIRE GRN/BLK WIRE GRN/BLU WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/WHT WIRE HAND MOTION SENSOR HEAD UNIT (LOWER LEFT END OF DASH) HEAD UNIT/INSTRUMENT CLUSTER DISPLAY CLUSTER HOT W/ BATTERY DISCONNECT SWITCH RELAY ENERGIZED HSVL INSTRUMENT CLUSTER CONTROL UNIT INSTRUMENT CLUSTER SPEAKER NCA WIRE RED WIRE RED/GRY WIRE SHD SHD CID/PIP SIG (1) SIG (2) SIG 3 SIG 4 VEHICLE INTERIOR FUSE, RELAY MODULE VIO WIRE VIO/WHT WIRE WAKE-UP WHT WIRE

BLK WIRE BLK/BLU WIRE BLK/GRN WIRE BLK/RED WIRE BLK/YEL WIRE BLU WIRE BRN WIRE BRN/GRY WIRE BRN/RED WIRE BRN/YEL WIRE BSM (+) SENS 1 CAN B H CAN B L COMPUTER DATA LINES SYSTEM DRIVER DOOR CONTROL UNIT DRIVER SEAT ADJUSTMENT SWITCH GROUP DRIVER SIDE OUTSIDE MIRROR DRIVER-SIDE POWER WINDOW, OUTSIDE MIRROR ADJUSTMENT SWITCH GROUP EC (+) EC GND FOLD OUT/IN FRONT PASSENGER DOOR CONTROL UNIT FRONT PASSENGER SEAT ADJUSTMENT SWITCH GROUP FUSE 156 FUSE 163 GRN WIRE GRY WIRE GRY/WHT WIRE HEAT (+) BSM GND HEAT GND HOT W/ BATTERY DISCONNECT SWITCH RELAY ENERGIZED ILLU (+) FOLD IN/OUT MOT GND/(+) MOT LR (+)/GND MOT UD (+)/GND PASSENGER SIDE OUTSIDE MIRROR RED WIRE RED/GRN WIRE SENS SENS (+) SENS 2 SENS 2 SENS GND TSI (+) TSI GND VEHICLE INTERIOR FUSE, RELAY MODULE VIO WIRE WHT WIRE YEL WIRE YEL/GRN WIRE YEL/WHT WIRE

ALARM SIREN BLU/GRY WIRE BRN WIRE BRN/BLK WIRE BRN/GRN WIRE BRN/RED WIRE CAN B H CAN B L CENTRAL CONTROL MODULE COMPUTER DATA LINES SYSTEM FUSE 129 FUSE 140 GRN WIRE GRN/BLU WIRE GRN/GRY WIRE HOT AT ALL TIMES HOT W/ BATTERY DISCONNECT SWITCH RELAY ENERGIZED INSIDE REAR VIEW MIRROR LEFT FRONT MIRROR LAMP SWITCH LEFT REAR INTERIOR/ READING LAMP LEFT SUN VISOR MIRROR LAMP NCA WIRE OVERHEAD CONTROL PANEL CONTROL UNIT REAR DOME LAMP REAR WINDOW GLASS BREAKAGE SENSOR RED WIRE RED/BLU WIRE RED/GRN WIRE RED/GRY WIRE RED/WHT WIRE RIGHT FRONT MIRROR LAMP SWITCH RIGHT REAR INTERIOR/ READING LAMP RIGHT SUN VISOR MIRROR LAMP RL (+) SIG SIG RL VEHICLE INTERIOR FUSE, RELAY MODULE W/ LIGHT, VISION W/O LIGHT, VISION WHT/BLU WIRE WHT/BRN WIRE YEL WIRE YEL/BLU WIRE YEL/GRN WIRE

BLK/BLU WIRE BLK/VIO WIRE BLU WIRE BRN WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/ORG WIRE BRN/RED WIRE BRN/WHT WIRE CAN B H CAN B L COMPUTER DATA LINES SYSTEM FLEX-E BP FLEX-E BM PNK WIRE FRONT PASSENGER DOOR CONTROL UNIT FRONT PASSENGER SEAT ADJUSTMENT SWITCH GROUP FRONT PASSENGER SEAT BACKREST INCLINATION ADJUSTMENT MOTOR, HALL SENSOR FRONT PASSENGER SEAT CONTROL UNIT FRONT PASSENGER SEAT FORE/AFT ADJUSTMENT MOTOR, HALL SENSOR FRONT PASSENGER SEAT HEIGHT ADJUSTMENT MOTOR, HALL SENSOR FRONT PASSENGER SEAT INCLINATION ADJUSTMENT MOTOR, HALL SENSOR FUSE 138 FUSE 163 FUSE 164 GRN WIRE GRN/ORG WIRE GRY WIRE GRY/BLU WIRE HOT AT ALL TIMES HOT W/ BATTERY DISCONNECT SWITCH RELAY ENERGIZED MOT GND/(+) ORG/ WIRE RED WIRE RED/GRN WIRE RED/GRY WIRE RED/ORG WIRE RED/VIO WIRE RED/WHT WIRE SEATS SYSTEM SENS SENS GND SIG SIG GND STEERING COLUMN MODULE CONTROL UNIT VEHICLE INTERIOR FUSE, RELAY MODULE VIO WIRE WHT/ORG WIRE

BLK/BLU WIRE BLK/YEL WIRE BRN WIRE BRN/GRY WIRE BRN/RED WIRE CAN B H CAN B H STERN CAN B L CENTRAL CONTROL MODULE COMPUTER DATA LINES SYSTEM DRIVER DOOR CONTROL UNIT DRIVER SIDE OUTSIDE MIRROR EC (+) EC GND EC GND EC+ FRONT PASSENGER DOOR CONTROL UNIT FUSE 140 FUSE 156 FUSE 169 GRN WIRE HOT W/ BATTERY DISCONNECT SWITCH RELAY ENERGIZED INSIDE REAR VIEW MIRROR LIN OVERHEAD CONTROL PANEL CONTROL UNIT PASSENGER SIDE OUTSIDE MIRROR POWER DISTRIBUTION SYSTEM RAIN/LIGHT SENSOR W/ ADDITIONAL FUNCTIONS RED WIRE RED/GRN WIRE RED/GRY WIRE RED/WHT WIRE VEHICLE INTERIOR FUSE, RELAY MODULE