Mercedes-Benz A-class W177 (2018-2023) (lower left end of dash) Wiring diagrams

AUGMENTED REALITY CAMERA BRN WIRE CAN HMI H CAN HMI L COMPUTER DATA LINES SYSTEM FUSE 148 HEAD UNIT HOT W/ BATTERY DISCONNECT SWITCH RELAY ENERGIZED HSVL NCA WIRE RED/BLK WIRE SHD SPV/AR VEHICLE INTERIOR FUSE, RELAY MODULE VIO WIRE VIO/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 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

BLU WIRE BRN WIRE BRN/RED WIRE CAN B H CAN B L CAN-D H CAN-D L CARSHARING CONTROL UNIT DIAGNOSTIC CONNECTOR DRIVER MULTICONTOUR SEAT CONTROL UNIT DRIVER SEAT CONTROL UNIT (UNDER DRIVER'S SEAT) ELECTRONIC IGNITION SWITCH CONTROL UNIT ETH (-) ETHERNET FUSE 109 GRN WIRE GRY WIRE GRY/WHT WIRE HEAD UNIT (LOWER LEFT END OF DASH) HEAD UNIT/ INSTRUMENT CLUSTER CONTROL UNIT HERMES CONTROL UNIT HOT W/ BATTERY DISCONNECT SWITCH RELAY ENERGIZED INSTRUMENT CLUSTER CONTROL UNIT PNK WIRE RED WIRE VEHICLE INTERIOR FUSE, RELAY MODULE W/ LEFT/RIGHT FRONT MULTICONTOUR SEATS W/O LEFT/RIGHT FRONT MULTICONTOUR SEATS WAKE-UP WHT WIRE WHT/BLK WIRE

AUGMENTED REALITY CAMERA (IF EQUIPPED) (TOP CENTER OF WINDSHIELD) BACKUP CAMERA CONTROL UNIT (IF EQUIPPED) (CENTER OF LIFTGATE) BLK WIRE BLK/WHT WIRE BLU WIRE BLU/WHT WIRE BRN WIRE CAN A H CAN A L CAN HMI H CAN HMI L HEAD UNIT (LOWER LEFT END OF DASH) HEAD UNIT/INSTRUMENT CLUSTER CONTROL UNIT HEAD-UP DISPLAY (IF EQUIPPED) (UPPER LEFT SIDE OF DASH) INSTRUMENT CLUSTER CONTROL UNIT LEFT FRONT REVERSIBLE EMERGENCY TENSIONING RETRACTOR NCA WIRE RIGHT FRONT REVERSIBLE EMERGENCY TENSIONING RETRACTOR SUPPLEMENTAL RESTRAINT SYSTEM CONTROL UNIT USER INTERFACE CAN (CAN HMI) POTENTIAL DISTRIBUTOR VIO WIRE VIO/WHT WIRE W/ PRE- SAFE

360 DEGREE SYSTEM REVERSING CAMERA BLU WIRE BRN WIRE FRONT END 360 DEGREE CAMERA GRN WIRE HEAD UNIT HSVL LEFT OUTSIDE MIRROR 360 DEGREE CAMERA LVDS H LVDS L NCA WIRE ORG/ WIRE PARKING SYSTEM CONTROL UNIT RIGHT OUTSIDE MIRROR 360 DEGREE CAMERA RVC SHD SHIELD SIG W/ 360 DEGREE CAMERA W/ BACKUP CAMERA W/ CONNECT 20 W/ CONNECT 5

BACKUP CAMERA CONTROL UNIT (CENTER OF LIFTGATE) BLU/BLK WIRE BLU/GRN WIRE BLU/GRY WIRE BRN WIRE BRN/RED WIRE CAN B H STERN CAN B L CAN HMI H CAN HMI L CENTRAL CONTROL MODULE COMPUTER DATA LINES SYSTEM ENGINE COMPARTMENT FUSE, RELAY MODULE FUSE 171 FUSE 21 HEAD UNIT HEAD UNIT/ INSTRUMENT CLUSTER CONTROL UNIT HOT W/ BATTERY DISCONNECT SWITCH RELAY ENERGIZED MOT GND/(+) NCA WIRE REAR CAMERA COVER MOTOR RED WIRE RED/WHT WIRE SHIELD SHIELD DISP/RVC SHIELD RVC SIG VEHICLE INTERIOR FUSE, RELAY MODULE VIO WIRE VIO/WHT WIRE W/ CONNECT 20 W/ CONNECT 5

BLU WIRE CENTER INSTRUMENT PANEL SPEAKER GRN WIRE GRN/GRY WIRE GRY WIRE GRY/BLU WIRE GRY/WHT WIRE HEAD UNIT LEFT C-PILLAR SURROUND SOUND SYSTEM MIDRANGE SPEAKER NCA WIRE PNK WIRE PNK/WHT WIRE REAR SUBWOOFER RED/GRY WIRE RIGHT C-PILLAR SURROUND SOUND SYSTEM MIDRANGE SPEAKER

BLK WIRE BLK/BLU WIRE BLK/YEL WIRE BLU WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE BRN/VIO WIRE BRN/YEL WIRE DRIVER ETR (GUS) SQUIB DRIVER KNEE BAG SQUIB FRONT PASSENGER AIR BAG BLEED VALVE SQUIB FRONT PASSENGER AIR BAG SQUIB 1 FRONT PASSENGER AIR BAG SQUIB 2 FRONT PASSENGER SEAT OCCUPIED RECOGNITION GRN WIRE GRN/YEL WIRE GRY WIRE GRY/YEL WIRE HEAD UNIT/ INSTRUMENT CLUSTER CONTROL UNIT HERMES CONTROL UNIT NCA WIRE PNK/BLK WIRE PNK/YEL WIRE RED/BLU WIRE SIG VIO WIRE VIO/YEL WIRE WEIGHT SENSING SYSTEM (WSS) CONTROL UNIT WHT/VIO WIRE