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

BLK WIRE BLK/WHT WIRE BLU WIRE BLU/BRN WIRE BLU/RED WIRE BLU/YEL WIRE BRN WIRE BRN/BLK WIRE BRN/GRN WIRE BRN/RED WIRE BRN/VIO WIRE BRN/WHT WIRE BRN/YEL WIRE CAN B H CAN B H STERN CAN B L CENTER ENGINE HOOD CONTACT SWITCH CENTRAL CONTROL MODULE CENTRAL LOCKING STATUS DISPLAY COMPUTER DATA LINES SYSTEM DCS DCS (+) DCS GND DRIVER DOOR AMBIANCE ILLUMINATION DRIVER DOOR CENTRAL LOCKING INSIDE DOOR HANDLE SWITCH DRIVER DOOR CONTROL UNIT DRIVER DOOR HANDLE AMBIANCE ILLUMINATION DRIVER DOOR HANDLE ILLUMINATION DRIVER DOOR LOCK DRIVER DOOR POCKET LIGHTING ENGINE COMPARTMENT FUSE, RELAY MODULE FUSE 156 FUSE 21 GRN WIRE GRN/BLU WIRE GRN/RED WIRE GRY/RED WIRE HOT AT ALL TIMES LED LIN LOCK UNLOCK MOT GND/(+) MOT- PNK/BLU WIRE PNK/VIO WIRE PNK/WHT WIRE RED WIRE RED/BLK WIRE RED/GRN WIRE SIG SIG (1) SIG (2) SIG GND TRUNK LID/LIFTGATE EXTERNAL OPERATION BUTTON TRUNK LID/LIFTGATE LOCK TRUNK LID/LIFTGATE UNLOCKING BUTTON VEHICLE INTERIOR FUSE, RELAY MODULE VIO/PNK WIRE W/ INCREASED THEFT PROTECTION WHT/GRN WIRE WHT/VIO WIRE YEL WIRE

ALARM SIREN BLK WIRE BLU WIRE BRN WIRE BRN/BLK WIRE BRN/GRN WIRE BRN/RED WIRE CAN B H CAN B L CAN HMI H CAN HMI L COMPUTER DATA COMPUTER DATA LINES SYSTEM CORNER OF ROOF) DCS (+) DCS GND DRIVER DOOR EXIT, WARNING LAMP FRONT PASSENGER DOOR LOCK FRONT RIGHT - FUSE 129 FUSE 140 FUSE 161 FUSE 163 GRN WIRE GRY/RED WIRE HOT AT ALL TIMES INSTRUMENT CLUSTER CONTROL UNIT LEFT REAR DOOR CENTRAL LOCKING INSIDE DOOR HANDLE SWITCH LEFT REAR DOOR CONTROL UNIT LEFT REAR DOOR HANDLE AMBIANCE ILLUMINATION LEFT REAR DOOR HANDLE ILLUMINATION LEFT REAR DOOR LOCK LEFT REAR DOOR STOWAGE COMPARTMENT ILLUMINATION LIN LINES SYSTEM LOCK UNLOCK MOT GND/(+) OVERHEAD CONTROL PANEL CONTROL UNIT PNK WIRE PNK/BLU WIRE PNK/GRN WIRE PNK/VIO WIRE PNK/WHT WIRE RED WIRE RED/BLK WIRE RED/BLU WIRE RED/GRN WIRE RED/WHT WIRE SIG GND VEHICLE INTERIOR FUSE, RELAY MODULE VIO WIRE VIO/WHT WIRE VISION PACKAGE W/ INCREASED THEFT PROTECTION W/ LIGHTS, WHEELWELL) WHT/VIO WIRE YEL WIRE YEL/GRN 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/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

BRN WIRE CAN HMI H CAN HMI L COMPUTER DATA LINES SYSTEM FUSE 115 FUSE 119 HOT AT ALL TIMES LEFT FRONT REVERSIBLE EMERGENCY TENSIONING RETRACTOR RED WIRE RED/BLK WIRE RIGHT FRONT REVERSIBLE EMERGENCY TENSIONING RETRACTOR VEHICLE INTERIOR FUSE, RELAY MODULE VIO WIRE VIO/WHT 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

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

AB 1 (+) AB 1 GND AB 2 (+) AB 2 GND BLK/YEL WIRE BLU WIRE BLU/GRY WIRE BLU/WHT WIRE BRN WIRE BRN/GRY WIRE BRN/WHT WIRE CENTER, RIGHT REAR PASSENGER COMPARTMENT SEAT BELT BUCKLES DRIVER AIR BAG SQUIB 1 DRIVER AIR BAG SQUIB 2 DRIVER SIDE BAG SQUIB FRONT PASSENGER SIDE BAG SQUIB FUSE 112 GRN WIRE GRN/GRY WIRE GRY WIRE GRY/BLK WIRE GRY/VIO WIRE GRY/YEL WIRE HOT AT ALL TIMES LEFT "C" PILLAR) LEFT REAR EMERGENCY TENSIONING RETRACTOR SQUIB LEFT REAR SEAT BELT BUCKLE SWITCH NCA WIRE RED/BLU WIRE RIGHT FRONT BUMPER PEDESTRIAN PROTECTION SENSOR RIGHT FRONTAL ACCELERATION SENSOR STEERING COLUMN MODULE CONTROL UNIT VEHICLE INTERIOR FUSE, RELAY MODULE VIO/YEL WIRE WHT/VIO WIRE