Mercedes-Benz GLA-class X156 facelift (2017-2020) front electrical prefuse box Wiring diagrams

AC HOUSING, AIR QUALITY SENSOR AIR RECIRCULATION MODE BUTTON AUTOMATIC AIR CONDITIONING CONTROL, OPERATING UNIT BF SIG BLOWER MOTOR BLOWER REGULATOR BLU WIRE BLU/BLK WIRE BLU/BRN WIRE BLU/VIO WIRE BLU/WHT WIRE BRN WIRE BRN/BLK WIRE BRN/GRN WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE CAN B H CAN B L CENTRAL AIR DISTRIBUTION POSITION DETECTION MICROSWITCH COMPUTER DATA LINES SYSTEM COOLANT CIRCULATION PUMP DEFOGGER SYSTEM EVAPORATOR TEMPERATURE SENSOR F SIG FRONT ELECTRICAL PREFUSE BOX FUSE 34 FUSE 5 FUSE 81 FUSE 82 GRN WIRE GRN/BLK WIRE GRN/BRN WIRE GRN/RED WIRE GRN/YEL WIRE HOT AT ALL TIMES INTERIOR TEMPERATURE SENSOR MK+ MOT- NCA WIRE ORG/ WIRE OUTSIDE TEMPERATURE SENSOR REAR WINDOW HEATER BUTTON RED WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE REFRIGERANT COMPRESSOR REFRIGERANT PRESSURE SENSOR RV+ S SIG SIG SUN SENSOR VEHICLE INTERIOR FUSE BOX VIO/BRN WIRE VIO/GRN WIRE VIO/WHT WIRE VIO/YEL WIRE W/O MAGNETIC CLUTCH W/ MAGNETIC CLUTCH WHT/BLK WIRE YEL/RED WIRE YEL/VIO WIRE

30 AB 30 FH 30 IB SRA AIR CONDITIONING SYSTEM ANTI-LOCK BRAKES SYSTEM BLK WIRE BLK/BLU WIRE BLK/GRN WIRE BLK/GRY WIRE BLK/RED WIRE BLK/WHT WIRE BLU WIRE BLU/BLK WIRE BLU/BRN WIRE BLU/GRN WIRE BLU/ORG WIRE BLU/RED WIRE BLU/VIO WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE BRN/BLU WIRE BRN/RED WIRE BRN/YEL WIRE CAN B H CAN B L CENTER ENGINE HOOD CONTACT SWITCH COMPUTER DATA LINES SYSTEM DOOR LOCKS SYSTEM ELV SIG ENGINE COMPARTMENT FUSE, RELAY MODULE ENGINE CONTROLS SYSTEM EXTERIOR LIGHTS, HEADLIGHTS SYSTEMS FRA-L FRA-R FRONT ELECTRICAL PREFUSE BOX FUSE 236 FUSE 25 FUSE 4 FUSE 79 FUSE 80 GRN WIRE GRN/BLK WIRE GRN/YEL WIRE GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/RED WIRE HEADLIGHTS SYSTEM HORN RLY HORNS SYSTEM HOT AT ALL TIMES I/P INSTRUMENT CLUSTER SYSTEM LIN-B 15 MOT- ORG/BLU WIRE PLR PLTFL R (+) PLTFL L (+) SIG PLTFL L (+) UPLTFL R PLTFL R (+) GND SIG POWER DISTRIBUTION SYSTEM RED WIRE RED/BLK WIRE RED/BLU WIRE RED/GRN WIRE RED/GRY WIRE RED/WHT WIRE RED/YEL WIRE SAM CONTROL UNIT (LEFT END OF DASH) SIG SIG (1) SIG (2) SIG 3 STARTING/CHARGING SYSTEM UPLTFL L (+) VEHICLE INTERIOR FUSE BOX VIO WIRE VIO/WHT WIRE WHT WIRE WHT/BLK WIRE WHT/RED WIRE WIPER/WASHER SYSTEM WMV A/D WMV PP WMV WS WSA YEL WIRE YEL/BLK WIRE YEL/BLU WIRE YEL/GRN WIRE YEL/GRY WIRE YEL/VIO WIRE YEL/WHT WIRE

30 B ALTERNATOR BATTERY SENSOR BLK WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/RED WIRE CAN B H CAN B L CAN E H CAN E L COMPUTER DATA LINES SYSTEM DECOUPLING RELAY ECO START/ STOP FUNCTION ADDITIONAL BATTERY ECO START/STOP FUNCTION ADDITIONAL BATTERY RELAY ELECTRONIC IGNITION SWITCH CONTROL UNIT FRONT ELECTRICAL PREFUSE BOX FUSE 1 FUSE 2 FUSE 22 FUSE 26 GRN WIRE GRN/WHT WIRE INSTRUMENT CLUSTER ME-SFI (ME) CONTROL UNIT ON-BOARD ELECTRICAL SYSTEM BATTERY PYROFUSE RED WIRE RED/GRN WIRE RED/YEL WIRE SAM CONTROL UNIT STARTER STARTER FRONT-END RELAY VEHICLE INTERIOR FUSE BOX W/ START/STOP VOLTAGE DIP PROTECTION W/O START/STOP VOLTAGE DIP PROTECTION

ACTIVATED CHARCOAL FILTER SHUTOFF VALVE AUTOMATIC AIR CONDITIONING CONTROL, OPERATING UNIT BLK/BLU WIRE BLU/BLK WIRE BLU/WHT WIRE BRN WIRE BRN/BLK WIRE BRN/GRN WIRE BRN/RED WIRE CAN B H CAN B L CAN I H CAN I L COMPUTER DATA LINES SYSTEM COOLANT CIRCULATION PUMP COOLANT PUMP SWITCHOVER VALVE COOLANT TEMPERATURE SENSOR COOLANT THERMOSTAT HEATING ELEMENT ENGINE COMPARTMENT FUSE, RELAY MODULE ENGINE CONTROLS SYSTEM FRONT ELECTRICAL PREFUSE BOX FUSE 213 FUSE 216 FUSE 34 FUSE 5 GRN/BLU WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/YEL WIRE HOT AT ALL TIMES HOT W/ CIRCUIT INTERIOR TEMPERATURE SENSOR W/ INTEGRATED FAN LIN ME-SFI (ME) CONTROL UNIT ORG/GRN WIRE OVERHEAD CONTROL PANEL CONTROL UNIT PURGE CONTROL VALVE PWM REAR OF ENGINE COMPT) RED WIRE RED/BLK WIRE RED/BLU WIRE RED/GRN WIRE RED/YEL WIRE REFRIGERANT PRESSURE SENSOR SIG VEHICLE INTERIOR FUSE BOX YEL WIRE YEL/BLK WIRE

AUTOMATIC AIR CONDITIONING CONTROL, OPERATING UNIT BLK WIRE BLU WIRE BRN WIRE BRN/RED WIRE CAN B H CAN B L COMPUTER DATA LINES SYSTEM FRONT ELECTRICAL PREFUSE BOX FUSE 2 FUSE 23 FUSE 24 FUSE 34 FUSE 35 30 GRN WIRE HEATED REAR WINDOW RELAY HOT AT ALL TIMES LEFT FRONT DOOR CONTROL UNIT LEFT OUTSIDE MIRROR MIRROR HEATER REAR WINDOW HEATER REAR WINDOW HEATER BUTTON REAR WINDOW INTERFERENCE SUPPRESSION CAPACITOR RED WIRE RED/BLK WIRE RED/BLU WIRE RIGHT FRONT DOOR CONTROL UNIT RIGHT OUTSIDE MIRROR VEHICLE INTERIOR FUSE BOX WHT WIRE YEL/RED WIRE

BLK WIRE BLU WIRE BLU/WHT WIRE BRN WIRE COMPUTER DATA LINES SYSTEM ELECTRIC POWER STEERING ACTUATOR MOTOR ELECTRIC POWER STEERING TORQUE SENSOR ELECTRICAL POWER STEERING CONTROL UNIT FRONT ELECTRICAL PREFUSE BOX FUSE 3 HOT AT ALL TIMES INSTRUMENT CLUSTER RED WIRE SIG-MAIN SIG-SUB WHT WIRE YEL WIRE

30 FH BLK/YEL WIRE BLU/BLK WIRE BLU/BRN WIRE BLU/GRN WIRE BLU/WHT WIRE BRN WIRE BRN/RED WIRE CAN B H CAN B L COMBINATION SWITCH COMPUTER DATA LINES COMPUTER DATA LINES SYSTEM DECOUPLING RELAY EXTERIOR LIGHTS SWITCH FRONT ELECTRICAL PREFUSE BOX FRONT FOG LAMP BUTTON FRONT FOG LAMPS INDICATOR LAMP FUSE 4 FUSE 89 GRN WIRE GRN/BRN WIRE GRN/ORG WIRE GRN/RED WIRE GRN/WHT WIRE GRY/BLU WIRE GRY/GRN WIRE HEADLAMP FLASHER/ HIGH BEAM SWITCH HIGH BEAM INDICATOR LAMP HOT AT ALL TIMES HOT W/ CIRCUIT 15 RELAY ENERGIZED HUMIDITY/ TEMPERATURE SENSOR INNER LEFT REAR LAMP UNIT INSTRUMENT CLUSTER LEFT FOG LAMP LEFT REAR FOG LAMP LIGHT SENSOR (-) LOW BEAM INDICATOR LAMP LOW BEAM SWITCH ORG/GRN WIRE OVERHEAD CONTROL PANEL CONTROL UNIT RAIN SENSOR RAIN/LIGHT SENSOR (W/ RAIN SENSOR) LIGHT SENSOR (W/O RAIN SENSOR) REAR FOG LAMP INDICATOR LAMP REAR FOG LIGHT BUTTON RED/YEL WIRE RIGHT FOG LAMP SAM CONTROL UNIT (LEFT END OF DASH) STEERING COLUMN MODULE CONTROL UNIT SWITCH ILLUMINATION SYSTEM VEHICLE INTERIOR FUSE BOX W/ RAIN SENSOR YEL WIRE YEL/BLK WIRE YEL/BLU WIRE

BLK WIRE BRN WIRE BRN/RED WIRE CAN B H CAN B L CAN E H CAN E L CENTER HORNS BUTTON COMPUTER DATA LINES SYSTEM DECOUPLING RELAY ENGINE COMPARTMENT FUSE, RELAY MODULE FANFARE HORN RELAY FRONT ELECTRICAL PREFUSE BOX FUSE 205 FUSE 32 GRN WIRE GRN/WHT WIRE HOT AT ALL TIMES LEFT FANFARE HORN LEFT FANFARE HORN SYSTEM BUTTON NCA WIRE RED WIRE REL FF RIGHT FANFARE HORN RIGHT FANFARE HORN SYSTEM BUTTON SAM CONTROL UNIT (LEFT END OF DASH) STEERING COLUMN MODULE CONTROL UNIT STEERING WHEEL CLOCK SPRING CONTACT STEERING WHEEL ELECTRONICS VEHICLE INTERIOR FUSE BOX W/O ECO START/STOP FUNCTION YEL WIRE YEL/BLK WIRE

ALTERNATOR AMPLIFIER CONTROL UNIT AUDIO COMAND CONTROL PANEL AUDIO/ COMAND DISPLAY AUTOMATIC AIR CONDITIONING CONTROL, OPERATING UNIT BATTERY SENSOR BLK WIRE BLU WIRE BRN WIRE CONTROL UNIT) DECOUPLING RELAY DRIVER SEAT CONTROL UNIT DRIVER SEAT LUMBAR SUPPORT ADJUSTMENT CONTROL UNIT ECO START/ STOP FUNCTION ADDITIONAL BATTERY RELAY ELECTRIC PARKING BRAKE CONTROL UNIT ELECTRICAL POWER STEERING CONTROL UNIT FAN MOTOR FRONT ELECTRICAL PREFUSE BOX FRONT PASSENGER SEAT CONTROL UNIT FRONT PASSENGER SEAT LUMBAR SUPPORT ADJUSTMENT CONTROL UNIT FUEL PUMP CONTROL UNIT FUSE 1 FUSE 2 FUSE 21 FUSE 22 FUSE 23 FUSE 24 FUSE 25 FUSE 27 FUSE 3 FUSE 32 FUSE 33 FUSE 34 FUSE 36 FUSE 37 FUSE 38 FUSE 39 FUSE 4 FUSE 46 FUSE 5 FUSE 54 FUSE 55 FUSE 56 FUSE 57 FUSE 58 FUSE 59 FUSE 6 FUSE 60 FUSE 61 FUSE 62 FUSE 63 FUSE 7 FUSE 73 FUSE 74 FUSE 75 FUSE 76 FUSE 77 FUSE 78 FUSE 8 FUSE 98 GRN WIRE GRY WIRE KEYLESS-GO CONTROL UNIT LEFT FRONT DOOR CONTROL UNIT N/A ON-BOARD ELECTRICAL SYSTEM BATTERY OVERHEAD CONTROL PANEL CONTROL UNIT PYROFUSE REAR SWITCHING MODULE RED WIRE RIGHT FRONT DOOR CONTROL UNIT SAM CONTROL UNIT SOUND SYSTEM STARTER STARTER FRONT-END RELAY STEERING COLUMN MODULE CONTROL UNIT SUPPLEMENTAL RESTRAINT SYSTEM TO ENGINE COMPARTMENT FUSE, RELAY MODULE (DIAGRAM 2 OF 5) TO ENGINE COMPARTMENT FUSE, RELAY MODULE (DIAGRAM 3 OF 5) TO FUSE 110 (DIAGRAM 2 OF 5) TO FUSE 47 (DIAGRAM 2 OF 5) TRAILER RECOGNITION CONTROL UNIT TRUNK LID/LIFT GATE CONTROL UNIT VEHICLE INTERIOR FUSE BOX VIO WIRE W/ MEMORY W/O KEYLESS-GO W/ KEYLESS-GO W/O MEMORY W/O START/STOP VOLTAGE DIP PROTECTION W/ START/STOP VOLTAGE DIP PROTECTION WHT WIRE YEL WIRE

BLK WIRE BLK/GRY WIRE BLU/RED WIRE BLU/YEL WIRE BRN WIRE BRN/BLU WIRE BRN/RED WIRE CAN B H CAN B L CAN E H CAN E L COMBINATION SWITCH COMPUTER DATA LINES SYSTEM DECOUPLING RELAY FRONT ELECTRICAL PREFUSE BOX FUSE 239 FUSE 32 FUSE 56 FUSE 82 FUSE 96 GRN WIRE GRN/BRN WIRE GRN/ORG WIRE GRN/RED WIRE GRN/WHT WIRE GRY WIRE HOT AT ALL TIMES HOT W/ CIRCUIT INSTRUMENT CLUSTER LIFTGATE WINDSHIELD WASHER SYSTEM SWITCH MOT- NCA WIRE ORG/GRN WIRE OVERHEAD CONTROL PANEL CONTROL UNIT RAIN/LIGHT SENSOR (W/ RAIN SENSOR) LIGHT SENSOR (W/O RAIN SENSOR) REAR WINDOW WIPER RELAY RED WIRE RED/BLU WIRE RED/VIO WIRE RED/WHT WIRE SAM CONTROL UNIT (LEFT END OF DASH) SIG SPRAY NOZZLE HEATER SPRAY NOZZLE HOSE HEATER STEERING COLUMN MODULE CONTROL UNIT TAILGATE WIPER MOTOR VEHICLE INTERIOR FUSE BOX VIO WIRE WINDSHIELD WASHER SYSTEM PUMP WINDSHIELD WASHER SYSTEM SWITCH WINDSHIELD WASHER SYSTEM WASHER FLUID LEVEL SWITCH WINDSHIELD WIPER ON/OFF RELAY WIPER LEVEL 1/2 RELAY WIPER MOTOR WIPER SWITCH WMV A/D WMV PP WMV WS YEL/GRN WIRE YEL/VIO WIRE