Mercedes-Benz C-class W205/S205/C205/A205 facelift (2018-2021) front sam control unit Wiring diagrams

ALARM SIREN BRN WIRE BRN/BLK WIRE BRN/GRN WIRE BRN/RED WIRE BRN/WHT WIRE CAN B H CAN B L CAN HMI H CAN HMI L CENTER CONSOLE ANTI-THEFT ALARM SYSTEM SWITCH GROUP COMPUTER DATA LINES SYSTEM EMERGENCY ALARM SYSTEM "CANCEL" BUTTON EMERGENCY ALARM SYSTEM "TRIGGER" BUTTON FRONT SAM CONTROL UNIT FUSE 308 FUSE 312 FUSE 318 FUSE 443 GRN/WHT WIRE HOT AT ALL TIMES HOT W/ BATTERY DISCONNECT SWITCH RELAY ENERGIZED INSTRUMENT CLUSTER LEFT FRONT DOOR INTERIOR PROTECTION SENSOR LEFT REAR INTERIOR PROTECTION SENSOR LEFT REAR WINDOW GLASS BREAKAGE SENSOR NCA WIRE OVERHEAD CONTROL PANEL CONTROL UNIT PASSENGER-SIDE A-PILLAR FUSE BOX REAR FUSE, RELAY MODULE REAR WINDOW GLASS BREAKAGE SENSOR RED WIRE RED/VIO WIRE RED/WHT WIRE RIGHT FRONT DOOR INTERIOR PROTECTION SENSOR RIGHT REAR INTERIOR PROTECTION SENSOR RIGHT REAR WINDOW GLASS BREAKAGE SENSOR SEDAN, COUPE SIG SPECIAL-PURPOSE VEHICLE MULTI-FUNCTION CONTROL UNIT YEL WIRE YEL/WHT WIRE

BLK/YEL WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/GRN WIRE BRN/RED WIRE BRN/WHT WIRE CAN B H CAN B L CAN HMI H CAN HMI L CLIMATE CONTROL OPERATING UNIT COMPUTER DATA LINES SYSTEM COOLANT LEVEL SWITCH COOLANT PUMP RELAY COOLANT TEMPERATURE SENSOR COOLANT THERMOSTAT HEATING ELEMENT DRIVER-SIDE FUSE, RELAY MODULE DRIVETRAIN CONTROL UNIT ELECTRIC COOLANT PUMP ENGINE COMPARTMENT PREFUSE BOX FAN MOTOR (BEHIND RADIATOR) FRONT SAM CONTROL UNIT FUSE 101 FUSE 107 FUSE 119 FUSE 209 FUSE 3 FUSE 315 FUSE 5 FUSE 7 GRN WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/RED WIRE GRY/YEL WIRE HOT W/ HOT W/ BATTERY DISCONNECT SWITCH RELAY ENERGIZED HOT W/ CPC RELAY ENERGIZED INSTRUMENT CLUSTER LEFT VEHICLE-END, ENGINE-END BUSBAR STUD 3 ME-SFI (ME) CONTROL UNIT NCA WIRE OUTSIDE TEMPERATURE SENSOR PANEL) PASSENGER-SIDE A-PILLAR FUSE BOX POWER SUPPLY POTENTIAL DISTRIBUTOR 3 PWR-1 RAIN/LIGHT SENSOR W/ ADDITIONAL FUNCTIONS RBA-1 RED WIRE RED/GRN WIRE RED/WHT WIRE REFRIGERANT COMPRESSOR (LOWER LEFT FRONT OF ENGINE) REFRIGERANT COMPRESSOR MAGNETIC CLUTCH REFRIGERANT COMPRESSOR REGULATION VALVE RELAY ENERGIZED SIG VIO/YEL WIRE YEL WIRE YEL/BRN WIRE YEL/WHT WIRE

BLK/YEL WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/GRN WIRE BRN/RED WIRE CAN B H CAN B L CAN C H CAN C L CAN HMI H CAN HMI L CLIMATE CONTROL UNIT COMPUTER DATA LINES SYSTEM COOLANT CIRCULATION PUMP COOLANT LEVEL SWITCH COOLANT PUMP RELAY COOLANT TEMPERATURE GAUGE COOLANT TEMPERATURE SENSOR COOLANT TEMPERATURE WARNING LAMP COOLANT THERMOSTAT HEATING ELEMENT DRIVER-SIDE FUSE, RELAY MODULE DRIVETRAIN CONTROL UNIT ELECTRIC COOLANT PUMP ENGINE COMPARTMENT PREFUSE BOX ENGINE FUSE, RELAY MODULE FAN MOTOR (BEHIND RADIATOR) FRONT SAM CONTROL UNIT FUSE 101 FUSE 107 FUSE 120 FUSE 207 FUSE 315 FUSE 5 FUSE 7 GRN WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/YEL WIRE HOT W/ HOT W/ BATTERY DISCONNECT (LEFT REAR OF ENGINE COMPT) SWITCH RELAY ENERGIZED HOT W/ BATTERY DISCONNECT SWITCH RELAY ENERGIZED HOT W/ CPC RELAY ENERGIZED INSTRUMENT CLUSTER INTERIOR TEMPERATURE SENSOR W/ INTEGRATED FAN LEFT VEHICLE-END, ENGINE-END BUSBAR STUD 3 ME-SFI (ME) CONTROL UNIT OVERHEAD CONTROL PANEL CONTROL UNIT PASSENGER-SIDE A-PILLAR FUSE BOX POWER SUPPLY POTENTIAL DISTRIBUTOR 3 PURGE CONTROL VALVE PWR-1 RBA-1 RED WIRE RED/BLK WIRE RED/GRN WIRE RED/WHT WIRE REG RELAY ENERGIZED SIG SIG GND WAPU+ WHT/BLU WIRE YEL WIRE YEL/BRN WIRE YEL/WHT WIRE

BLK WIRE BLU/BLK WIRE BLU/BRN WIRE BLU/GRN WIRE BRN WIRE BRN/RED WIRE CAN B H CAN B L CAN H H CAN H L CAN HMI H CAN HMI L COC COMPUTER DATA LINES SYSTEM DRIVER-SIDE FUSE, RELAY MODULE DTRL ELECTRIC PARKING BRAKE SWITCH ELECTRONIC STABILITY PROGRAM CONTROL UNIT ENGINE FUSE, RELAY MODULE EXTERIOR LIGHTS SWITCH FRONT SAM CONTROL UNIT FUSE 126 FUSE 200 FUSE 3 GRN WIRE GRY/BLU WIRE GRY/ORG WIRE GRY/PNK WIRE GRY/VIO WIRE GRY/WHT WIRE GRY/YEL WIRE HB (+) HOT AT ALL TIMES HOT W/ ENGINE COMPARTMENT TERMINAL 15 RELAY ENERGIZED INSTRUMENT CLUSTER LB (+) LEFT FRONT LAMP UNIT MULTI FUSE 1 PASSENGER-SIDE A-PILLAR FUSE BOX PNK WIRE PNK/RED WIRE RAIN/LIGHT SENSOR W/ ADDITIONAL FUNCTIONS RED WIRE RED/WHT WIRE RIGHT FRONT LAMP UNIT SENS SIG (1) SIG (2) SIG 3 SIG 4 SML TSI-L (+) VIO WIRE VIO/WHT WIRE YEL WIRE YEL/WHT WIRE

BLK WIRE BLK/BRN WIRE BLU/BRN WIRE BRN WIRE BRN/RED WIRE CAN B H CAN B L CAN H H CAN H L CAN HMI H CAN HMI L CAN PER H CAN PER L COC COMPUTER DATA LINES SYSTEM DRIVER-SIDE FUSE, RELAY MODULE ELECTRIC PARKING BRAKE SWITCH ELECTRONIC STABILITY PROGRAM CONTROL UNIT ENGINE FUSE, RELAY MODULE EXTERIOR LIGHTS SWITCH FRONT SAM CONTROL UNIT FUSE 110 FUSE 111 FUSE 126 FUSE 200 FUSE 3 GRN WIRE GRN/WHT WIRE GRY/BLU WIRE HOT AT ALL TIMES HOT W/ ENGINE COMPARTMENT TERMINAL 15 RELAY ENERGIZED INSTRUMENT CLUSTER LEFT FRONT LAMP UNIT LEFT REAR LEVEL SENSOR MULTI FUSE 1 PASSENGER-SIDE A-PILLAR FUSE BOX PNK WIRE PNK/RED WIRE RAIN/LIGHT SENSOR W/ ADDITIONAL FUNCTIONS RED WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE RIGHT FRONT LAMP UNIT SENS SIG SIG (1) SIG (2) SIG 3 SIG 4 VIO WIRE VIO/WHT WIRE WHT WIRE WHT/BLK WIRE YEL WIRE YEL/WHT WIRE

BLK WIRE BLU WIRE BRN WIRE BRN/RED WIRE CAN B H CAN B L COMPUTER DATA LINES SYSTEM FRONT SAM CONTROL UNIT FUSE 312 FUSE 317 GRN WIRE GRY WIRE HALL SENSOR 1 HALL SENSOR 2 HOT W/ BATTERY DISCONNECT SWITCH RELAY ENERGIZED MOT- MOTOR OVERHEAD CONTROL PANEL CONTROL UNIT PANORAMIC SLIDING ROOF ROLLER SUN BLIND DRIVE UNIT PANORAMIC SLIDING SUNROOF CONTROL MODULE PASSENGER-SIDE A-PILLAR FUSE BOX RED WIRE RED/WHT WIRE SEDAN, COUPE SIG (1) SIG (2)

BLK WIRE BRN WIRE BRN/RED WIRE CAN B H CAN B L COMPUTER DATA LINES SYSTEM COUPE, SEDAN DISCONNECT SWITCH RELAY ENERGIZED EC (+) EC GND EC GND EC+ FRONT SAM CONTROL UNIT FUSE 3 FUSE 302 FUSE 312 FUSE 406 HOT W/ BATTERY HOT W/ BATTERY DISCONNECT SWITCH RELAY ENERGIZED INSIDE REAR VIEW MIRROR LEFT FRONT DOOR CONTROL UNIT LEFT OUTSIDE MIRROR MULTIPLE FUSE 1 NCA WIRE OVERHEAD CONTROL PANEL CONTROL UNIT PASSENGER-SIDE A-PILLAR FUSE BOX RAIN/LIGHT SENSOR W/ ADDITIONAL FUNCTIONS REAR FUSE, RELAY MODULE RED WIRE RED/WHT WIRE RIGHT FRONT DOOR CONTROL UNIT RIGHT OUTSIDE MIRROR YEL WIRE

BLK/BLU WIRE BLK/GRN WIRE BLU/BLK WIRE BRN WIRE BRN/RED WIRE CAN B H CAN B L COMPUTER DATA LINES SYSTEM COUPE CONVERTIBLE COUPE, SEDAN FRONT PASSENGER SEAT BACKREST INCLINATION ADJUSTMENT MOTOR FRONT PASSENGER SEAT PARTIALLY ELECTRIC SEAT ADJUSTMENT SWITCH FRONT SAM CONTROL UNIT FUSE 476 GRN WIRE GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/BRN WIRE GRY/WHT WIRE HOT W/ BATTERY DISCONNECT SWITCH RELAY ENERGIZED LEFT BACKREST RELEASE/ INCLINATION MICROSWITCH LEFT LUGGAGE COMPARTMENT REAR BACKREST RELEASE BUTTON LEFT REAR BACKREST INCLINATION SWITCH LEFT REAR BACKREST LOCK SWITCH LEFT REAR BACKREST RELEASE ACTUATOR ORG/ WIRE ORG/BLU WIRE ORG/GRN WIRE ORG/PNK WIRE PNK WIRE REAR FUSE, RELAY MODULE REAR SAM CONTROL UNIT RED WIRE RED/GRN WIRE RIGHT BACKREST RELEASE/ INCLINATION MICROSWITCH RIGHT LUGGAGE COMPARTMENT REAR BACKREST RELEASE BUTTON RIGHT REAR BACKREST INCLINATION SWITCH RIGHT REAR BACKREST LOCK SWITCH RIGHT REAR BACKREST RELEASE ACTUATOR SIG SIG PNK (+) WIRE YEL/GRN WIRE

BASIC BLK WIRE BLU WIRE BRAKE FLUID LEVEL SWITCH BRN WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/RED WIRE BRN/WHT WIRE CAN B H CAN B L CAN B L RBA-1 CAN H H CAN H L CAN HMI H CAN HMI L COMPUTER DATA LINES COMPUTER DATA LINES SYSTEM DRIVER SEAT BELT BUCKLE SWITCH DRIVER-SIDE FUSE, RELAY MODULE ELECTRIC PARKING BRAKE SWITCH GROUP ELECTRONIC STABILITY PROGRAM CONTROL UNIT ENGINE COMPARTMENT PREFUSE BOX FRONT SAM CONTROL UNIT FUSE 1 FUSE 2 FUSE 200 FUSE 322 FUSE 477 GRN WIRE GRY/BLU WIRE GRY/GRN WIRE HOT AT ALL TIMES HOT W/ BATTERY DISCONNECT SWITCH RELAY ENERGIZED INSTRUMENT CLUSTER LEFT FRONT DOOR CONTROL UNIT (IN LEFT FRONT DOOR) LEFT FRONT DOOR LOCK PASSENGER-SIDE A-PILLAR FUSE BOX PWR-1 REAR FUSE, RELAY MODULE REAR SAM CONTROL UNIT RED WIRE RED/WHT WIRE RED/YEL WIRE RIGHT FRONT BRAKE WEAR SENSOR RIGHT REAR BRAKE WEAR SENSOR ROTARY TUMBLER SWITCH SIG SIG (+) CAN-B H SIG (1) SIG (2) SIG 3 SIG 4 SIG GND SUPPLEMENTAL RESTRAINT SYSTEM CONTROL UNIT SUPPLEMENTAL RESTRAINTS SYSTEM SYSTEM VIO WIRE VIO/WHT WIRE WHT WIRE WHT/GRY WIRE YEL WIRE YEL/WHT WIRE

BLK/BLU WIRE BLU/WHT WIRE BRN WIRE BRN/RED WIRE BRN/YEL WIRE CAN B H CAN B L CAN HMI H CAN HMI L COMPUTER DATA LINES SYSTEM DRIVER-SIDE FUSE, RELAY MODULE ENGINE COMPARTMENT PREFUSE BOX ENGINE FUSE, RELAY MODULE FRONT SAM CONTROL UNIT FUSE 106 FUSE 112 FUSE 200 FUSE 3 FUSE 5 HOT AT ALL TIMES INSTRUMENT CLUSTER MULTIPLE FUSE 1 N/A PASSENGER-SIDE A-PILLAR FUSE BOX RAIN/LIGHT SENSOR W/ ADDITIONAL FUNCTIONS RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE SIG WINDSHIELD WASHER SYSTEM PUMP WINDSHIELD WASHER SYSTEM WASHER FLUID LEVEL SWITCH WIPER MOTOR WIPER PARK POSITION HEATER RELAY YEL WIRE YEL/WHT WIRE