Mercedes-Benz A-class W177 (2018-2023) red Wiring diagrams

BLU WIRE BLU/WHT WIRE BRN WIRE CAN HMI H CAN HMI L CAN LR H CAN LR L COMPUTER DATA LINES SYSTEM ELECTRONIC IGNITION SWITCH CONTROL UNIT ENGINE COMPARTMENT FUSE, RELAY MODULE FLEXRAY E BP PNK FLEXRAY E BM WIRE FUSE 164 FUSE 49 GRN WIRE HOT AT ALL TIMES INSTRUMENT CLUSTER CONTROL UNIT NCA WIRE P NOT RED WIRE RED/GRN WIRE RED/WHT WIRE SIG STEERING COLUMN MODULE CONTROL UNIT STEERING WHEEL DOWNSHIFT BUTTON STEERING WHEEL ELECTRONICS STEERING WHEEL UPSHIFT BUTTON VEHICLE INTERIOR FUSE, RELAY MODULE VIO WIRE VIO/WHT WIRE

ALL-WHEEL DRIVE CONTROL UNIT BLK WIRE BRN WIRE COMPUTER DATA LINES SYSTEM DIFFERENTIAL LOCK ACTUATOR FLEX-E BP FUSE 139 GRN WIRE GRY WIRE HOT AT ALL TIMES MOT GND/(+) NCA WIRE ORG/ WIRE RED WIRE RED/BLK WIRE SENS (+) FLEX-E BM PNK WIRE SENS 1 SENS 2 SENS GND SHD TEMP TEMP GND VEHICLE INTERIOR FUSE, RELAY MODULE WHT WIRE YEL WIRE

58 D AIR CONDITIONING SYSTEM ANTI-LOCK BRAKES SYSTEM BLK WIRE BLK/BLU WIRE BLK/ORG WIRE BLK/RED WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/BRN WIRE BLU/GRN WIRE BLU/WHT WIRE BRN WIRE BRN/GRN WIRE BRN/RED WIRE BRN/VIO WIRE BRN/WHT WIRE BRN/YEL WIRE CENTRAL CONTROL MODULE CLUTCH COMPUTER DATA LINES SYSTEM CRUISE CONTROL SYSTEM DOOR LOCKS SYSTEM, ANTI-THEFT SYSTEMS DTRL ENGINE COMPARTMENT FUSE, RELAY MODULE ENGINE CONTROLS SYSTEM FUSE 21 FUSE 40 FUSE 42 FUSE 68 GND KLA GRN WIRE GRN/BLU WIRE GRN/BRN WIRE GRN/VIO WIRE GRN/YEL WIRE GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/GRN WIRE GRY/ORG WIRE GRY/RED WIRE HAZARD SIG HB (+) HEADLIGHTS SYSTEM HEADLIGHTS, EXTERIOR LIGHTS SYSTEMS HORNS SYSTEM HOT W/ BATTERY DISCONNECT SWITCH RELAY ENERGIZED HOT W/ ENGINE COMPARTMENT 15 RELAY ENERGIZED HOT W/ TERMINAL ILLU INSTRUMENT CLUSTER SYSTEM LB (+) MOT GND/(+) MOT GND/(+) HAZARD SIG NCA WIRE ORG/ WIRE PNK WIRE PNK/RED WIRE POWER DISTRIBUTION SYSTEM RED WIRE RED/BLU WIRE RED/PNK WIRE RED/VIO WIRE RED/YEL WIRE RELAY ENERGIZED SIG SIG (1) SIG (2) SIG 3 SML STARTING/CHARGING SYSTEM TSI-L (+) TSIR (+) VALVE GND VIO WIRE VIO/BLK WIRE WHT/BLU WIRE WIPER/WASHER SYSTEM YEL WIRE YEL/GRY WIRE

ADDITIONAL BATTERY FUSE AIR CONDITIONING SYSTEM BL (+) BL/TST (+) BLK/ORG 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/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE BRN/GRY WIRE BRN/RED WIRE BUL (+) CAN B H CAN B H STERN CAN B L CENTRAL CONTROL MODULE COMPUTER DATA LINES SYSTEM CRASH DCS DEFOGGER SYSTEM DIAG DOOR LOCKS, TRUNK, TAILGATE, FUEL DOORS SYSTEMS ENGINE CONTROLS SYSTEM FUSE 158 FUSE 165 GRN WIRE GRN/BLK WIRE GRN/BRN WIRE GRN/GRY WIRE GRN/WHT WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/PNK WIRE GRY/WHT WIRE HOT AT ALL TIMES HOT W/ BATTERY DISCONNECT SWITCH RELAY ENERGIZED INSTRUMENT CLUSTER SYSTEM MOT (+) GND MOT MOT GND/(+) MOT- NAVIGATION SYSTEM ORG/BLK WIRE PNK/BLU WIRE PNK/GRY WIRE PNK/RED WIRE POWER DISTRIBUTION SYSTEM RED WIRE RED/BLK WIRE RED/BLU WIRE RED/GRN WIRE RED/GRY WIRE RED/YEL WIRE REL (+) SEATS SYSTEM SIG SIG (1) SIG (L) SIG R SUPPLEMENTAL RESTRAINTS SYSTEM TL (+) TL/PL (+) TRUNK, TAILGATE, FUEL DOORS SYSTEM TSI (+) VEHICLE INTERIOR FUSE, RELAY MODULE VIO WIRE VIO/BLK WIRE VIO/GRN WIRE WHT/VIO WIRE WIPER/WASHER SYSTEM WIPER/WASHER SYSTEM NAVIGATION SYSTEM WIPER/WASHER, MIRRORS, HEADLIGHTS SYSTEMS YEL WIRE YEL/GRN WIRE YEL/WHT WIRE

AUDIO H AUDIO L+ AUGMENTED REALITY CAMERA BACKUP CAMERA CONTROL UNIT BLK WIRE BLK/BLU WIRE BLK/WHT WIRE BLU WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE CAN A H CAN A L CAN HMI H CAN HMI L CAN-D H CAN-D L CARSHARING CONTROL UNIT COMPUTER DATA LINES SYSTEM DRIVER HANDS-FREE SYSTEM MICROPHONE FRONT PASSENGER HANDS-FREE SYSTEM MICROPHONE FUSE 152 FUSE 166 GPS GPS ANTENNA GRN WIRE GRN/PNK WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE GRY/WHT WIRE HEAD UNIT (LOWER LEFT END OF DASH) HOT W/ BATTERY DISCONNECT SWITCH RELAY ENERGIZED HSVL LEFT A-PILLAR TWEETER LEFT FRONT DOOR WOOFER/MIDRANGE SPEAKER LEFT REAR DOOR TWEETER LEFT REAR DOOR WOOFER/MIDRANGE SPEAKER MIC H MIC-L NCA WIRE PARKING SYSTEM CONTROL UNIT RED WIRE RED/GRN WIRE RED/GRY WIRE SHD SHD GNSS SHD MM-BOX SHD RVC SHD SPV/AR USB DATA H USB DATA L USB RUI H USB RUI L VEHICLE INTERIOR FUSE, RELAY MODULE VIO WIRE VIO/WHT WIRE W/ ACTIVE PARKING ASSIST W/ PARKTRONIC W/ HERMES LTE W/O ACTIVE PARKING ASSIST W/ PARKTRONIC W/O HERMES LTE W/O SOUND SYSTEM WAKE-UP WHT WIRE

AUDIO H AUDIO L+ BLK WIRE BLK/BLU WIRE BLK/WHT WIRE BLU WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE CAN A H CAN A L CAN HMI H CAN HMI L COMPUTER DATA LINES SYSTEM DRIVER HANDS-FREE SYSTEM MICROPHONE ETH (-) FRONT PASSENGER HANDS-FREE SYSTEM MICROPHONE GRN WIRE GRN/BLU WIRE GRN/PNK WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE GRY/BLU WIRE HEAD UNIT/INSTRUMENT CLUSTER CONTROL UNIT LEFT A-PILLAR TWEETER LEFT FRONT DOOR WOOFER/MIDRANGE SPEAKER MIC H MUTE NCA WIRE PNK WIRE RED WIRE RED/GRY WIRE RIGHT A-PILLAR TWEETER RIGHT FRONT DOOR WOOFER/MIDRANGE SPEAKER RIGHT REAR DOOR TWEETER RIGHT REAR DOOR WOOFER/MIDRANGE SPEAKER SHD SUPPLEMENTAL RESTRAINTS SYSTEM USB DATA H USB DATA L USB RUI H USB RUI L VIO WIRE VIO/WHT WIRE W/ SOUND SYSTEM WAKE-UP WHT WIRE WHT/BLK WIRE YEL WIRE

AM FM DABIII ANTENNA AMPLIFIER AUDIO H AUDIO L+ BLK WIRE BLK/ORG WIRE BLU WIRE BLU/BRN WIRE BRN WIRE BT WLAN CENTER INSTRUMENT PANEL SPEAKER DABIII ELECTRONIC IGNITION SWITCH CONTROL UNIT FM AM FM DABIII FUSE 204 GRN WIRE GRN/BLU WIRE GRN/BRN WIRE GRN/GRY WIRE GRY/BLU WIRE HEAD UNIT/INSTRUMENT CLUSTER CONTROL UNIT HOT W/ BATTERY DISCONNECT SWITCH RELAY ENERGIZED HSVL MIC-L MIDLINE SOUND SYSTEM NCA WIRE PNK WIRE REAR FUSE, RELAY MODULE REAR SPOILER ANTENNA REAR SUBWOOFER REAR WINDOW ANTENNA RED WIRE RED/BLU WIRE RED/GRY WIRE SHD SOUND SYSTEM AMPLIFIER CONTROL UNIT W/ MIDLINE SOUND SYSTEM WAKE-UP WHT WIRE WHT/BLK WIRE YEL WIRE

AM FM DABIII AUDIO H AUDIO L+ BLK WIRE BLK/BLU WIRE BLU WIRE BLU/WHT WIRE BLUETOOTH/WIFI ANTENNA BT WLAN COMPUTER DATA LINES SYSTEM DIAGNOSTIC CONNECTOR ETH (+) ETHERNET ETH (-) ETH (-) PNK ETH (+) WIRE FM DABIII FUSE 108 FUSE 131 FUSE 144 FUSE 145 FUSE 152 GRN WIRE GRN/BLK WIRE GRN/BLU WIRE GRY/BLU WIRE HEAD UNIT (LOWER LEFT END OF DASH) HOT W/ BATTERY DISCONNECT SWITCH RELAY ENERGIZED HSVL INSTRUMENT CLUSTER CONTROL UNIT INT-WLAN-EXT MOST MUTE NCA WIRE PNK AUDIO L WIRE PNK WIRE RED WIRE RED/BLU WIRE RED/BRN WIRE RED/GRY WIRE RED/YEL WIRE SDARS SDARS ANTENNA SHD SHD BT/WLAN SHD CID/PIP SHD EMOST SHD FM/AM SHD TV/SDARS SHD WLAN TV 1 ANTENNA AMPLIFIER TV 3 ANTENNA AMPLIFIER VEHICLE INTERIOR FUSE, RELAY MODULE WAKE-UP WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/GRY WIRE

AUDIO H AUDIO L+ BLK WIRE BLK/WHT WIRE BLU WIRE BLU/WHT WIRE BRN WIRE COMPUTER DATA LINES SYSTEM FUSE 104 GRN WIRE GRN/BLU WIRE GRN/GRY WIRE GRN/WHT WIRE GRY WIRE GRY/BLU WIRE GRY/WHT WIRE HERMES CONTROL UNIT HOT W/ BATTERY DISCONNECT SWITCH RELAY ENERGIZED LEFT A-PILLAR SURROUND SOUND SYSTEM TWEETER LEFT FRONT DOOR SURROUND SOUND SYSTEM MIDRANGE SPEAKER LEFT REAR DOOR SURROUND SOUND SYSTEM TWEETER LEFT REAR MIDRANGE SPEAKER (PREMIUM) MOST MUTE NCA WIRE PNK WIRE PNK/WHT WIRE RED WIRE RED/GRY WIRE RIGHT A-PILLAR SURROUND SOUND SYSTEM TWEETER RIGHT FRONT DOOR SURROUND SOUND SYSTEM MIDRANGE SPEAKER RIGHT REAR DOOR SURROUND SOUND SYSTEM MIDRANGE SPEAKER RIGHT REAR TWEETER (PREMIUM) SHD SOUND SYSTEM AMPLIFIER CONTROL UNIT VEHICLE INTERIOR FUSE, RELAY MODULE VIO WIRE VIO/WHT WIRE

BLU/BRN WIRE BLU/RED WIRE BLU/YEL WIRE BRN WIRE BRN/RED WIRE CAN B H STERN CAN B L CENTRAL CONTROL MODULE COMPUTER DATA LINES SYSTEM DCS ENGINE COMPARTMENT FUSE, RELAY MODULE FUSE 21 GRN/GRY WIRE GRN/WHT WIRE GRY/BLU WIRE GRY/PNK WIRE HOT W/ BATTERY DISCONNECT SWITCH RELAY ENERGIZED MOT- RED WIRE SIG TANK CAP CENTRAL LOCKING ACTUATOR TRUNK LID/ LIFTGATE LOCK TRUNK LID/LIFTGATE EMERGENCY OPENING BUTTON TRUNK LID/LIFTGATE EXTERNAL OPERATION BUTTON