Mercedes-Benz CLS-class C257 (2017-2021) front sam control unit Wiring diagrams

BLK WIRE BLK/BLU WIRE BRAKE FLUID LEVEL SWITCH BRN WIRE BRN/BLK WIRE BRN/RED WIRE BRN/WHT WIRE CAN B H CAN B L CAN HMI H CAN HMI L COMPUTER DATA LINES SYSTEM COUPE CONVERTIBLE DRIVER-SIDE FUSE, RELAY MODULE ELECTRIC PARKING BRAKE SWITCH FLEX-E BM FLEX-E BP FRONT SAM CONTROL UNIT FUSE 205 GRN WIRE GRY/BLU WIRE HOT AT ALL TIMES INSTRUMENT CLUSTER LEFT ELECTRIC PARKING BRAKE ACTUATOR MOTOR LEFT FRONT AXLE RPM SENSOR NCA WIRE PNK WIRE RED WIRE RED/BLU WIRE RED/WHT WIRE RIGHT ELECTRIC PARKING BRAKE ACTUATOR MOTOR RIGHT FRONT AXLE RPM SENSOR RIGHT FRONT BRAKE WEAR SENSOR SIG STEERING COLUMN MODULE CONTROL UNIT VIO WIRE VIO/WHT WIRE WHT WIRE WHT/YEL WIRE YEL WIRE

??? ??? BLK WIRE BLK/VIO WIRE BLU WIRE BLU/BLK WIRE BRN WIRE BRN/BLU WIRE BRN/GRN WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE CAN B H CAN B L COMPUTER DATA LINES SYSTEM DCS FRONT SAM CONTROL UNIT FUSE 302 FUSE 424 FUSE 6 GRN WIRE GRY WIRE GRY/RED WIRE HOT AT ALL TIMES LEFT FANFARE HORN LEFT REAR DOOR WARNING LAMP LOCK MOT GND/(+) MOT GND/(+) DCS GND MULTIPLE FUSE 3 ORG/GRN WIRE PASSENGER-SIDE A-PILLAR FUSE BOX PNK/BLU WIRE PNK/VIO WIRE PNK/WHT WIRE PRE-LOCKING POSITION MICROSWITCH REAR FUSE, RELAY MODULE RED WIRE RED/BLU WIRE RED/GRN WIRE RED/YEL WIRE RIGHT FRONT DOOR AMBIANCE ILLUMINATION RIGHT FRONT DOOR CENTRAL LOCKING INTERIOR SWITCH RIGHT FRONT DOOR CONTROL UNIT RIGHT FRONT DOOR EXTERIOR DOOR HANDLE ILLUMINATION RIGHT FRONT DOOR HANDLE AMBIANCE ILLUMINATION RIGHT FRONT DOOR LOCK RIGHT FRONT DOOR POWER CLOSING ACTUATOR MOTOR RIGHT FRONT DOOR STOWAGE COMPARTMENT ILLUMINATION SIG SIG GND THEFT DETECTION SYSTEM ELECTRICAL CONNECTOR THEFT DETECTION SYSTEM HORN RELAY UNLOCK W/ INCREASED THEFT PROTECTION W/ POWER CLOSING W/O POWER CLOSING W/ PREMIUM AMBIENT LIGHTING WHT/VIO WIRE YEL WIRE YEL/GRY WIRE

BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/GRN WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE BRN/GRN WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE CAN B H CAN B L CAN PER H CAN PER L CLIMATE CONTROL OPERATING UNIT COMPUTER DATA LINES SYSTEM COOLANT TEMPERATURE SENSOR DRIVER-SIDE FUSE, RELAY MODULE DRIVETRAIN CONTROL UNIT ELECTRIC COOLANT PUMP (BOTTOM RIGHT FRONT OF ENGINE) ENGINE COMPARTMENT PREFUSE BOX ENGINE FUSE, RELAY MODULE FAN MOTOR (BEHIND RADIATOR) FRONT SAM CONTROL UNIT FUSE 117 FUSE 119 FUSE 209 FUSE 305 FUSE 311 FUSE 7 GND TMOT GRN WIRE GRN/BLK WIRE GRN/WHT WIRE GRY/RED WIRE HOT AT ALL TIMES HOT W/ CPC RELAY ENERGIZED LIN ME-SFI (ME) CONTROL UNIT (LEFT TOP OF ENGINE) NCA WIRE OUTSIDE TEMPERATURE SENSOR OVERHEAD CONSOLE PASSENGER-SIDE A-PILLAR FUSE BOX PNK WIRE RAIN/LIGHT SENSOR RED WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE REFRIGERANT COMPRESSOR REFRIGERANT COMPRESSOR W/ MAGNETIC CLUTCH REFRIGERANT PRESSURE SENSOR (AT BOTTOM LEFT SIDE OF RADIATOR) SIG SIG GND W/ REFRIGERANT COMPRESSOR MAGNETIC CLUTCH W/O REFRIGERANT COMPRESSOR MAGNETIC CLUTCH YEL WIRE YEL/BLK WIRE

??? ??? BLK WIRE BLK/VIO WIRE BLU WIRE BLU/BLK WIRE BRN WIRE BRN/BLU WIRE BRN/GRN WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE CAN B H CAN B L COMPUTER DATA LINES SYSTEM DCS FRONT SAM CONTROL UNIT FUSE 302 FUSE 424 FUSE 6 GRN WIRE GRY WIRE GRY/RED WIRE HOT AT ALL TIMES LEFT FANFARE HORN LEFT REAR DOOR WARNING LAMP LOCK MOT GND/(+) MOT GND/(+) DCS GND MULTIPLE FUSE 3 ORG/GRN WIRE PASSENGER-SIDE A-PILLAR FUSE BOX PNK/BLU WIRE PNK/VIO WIRE PNK/WHT WIRE PRE-LOCKING POSITION MICROSWITCH REAR FUSE, RELAY MODULE RED WIRE RED/BLU WIRE RED/GRN WIRE RED/YEL WIRE RIGHT FRONT DOOR AMBIANCE ILLUMINATION RIGHT FRONT DOOR CENTRAL LOCKING INTERIOR SWITCH RIGHT FRONT DOOR CONTROL UNIT RIGHT FRONT DOOR EXTERIOR DOOR HANDLE ILLUMINATION RIGHT FRONT DOOR HANDLE AMBIANCE ILLUMINATION RIGHT FRONT DOOR LOCK RIGHT FRONT DOOR POWER CLOSING ACTUATOR MOTOR RIGHT FRONT DOOR STOWAGE COMPARTMENT ILLUMINATION SIG SIG GND THEFT DETECTION SYSTEM ELECTRICAL CONNECTOR THEFT DETECTION SYSTEM HORN RELAY UNLOCK W/ INCREASED THEFT PROTECTION W/ POWER CLOSING W/O POWER CLOSING W/ PREMIUM AMBIENT LIGHTING WHT/VIO WIRE YEL WIRE YEL/GRY WIRE

BATTERY DISCONNECT SWITCH RELAY BATTERY SENSOR BLK WIRE BLU/WHT WIRE BRN WIRE BRN/RED WIRE BRN/VIO WIRE CAN B H CAN B L CAN HMI H CAN HMI L CIRCUIT 30 TERMINAL BLOCK COMPUTER DATA LINES SYSTEM DC/DC CONVERTER CONTROL UNIT DRIVER-SIDE FUSE, RELAY MODULE FRONT SAM CONTROL UNIT FUSE 202 FUSE 6 INSTRUMENT CLUSTER INTEGRATED STARTER GENERATOR LIN ME-SFI (ME) CONTROL UNIT MPAC U MPAC V MPAC X MPAC Y MPAC Z NCA WIRE ON-BOARD ELECTRICAL SYSTEM BATTERY RED WIRE RED/BLK WIRE RED/WHT (OR RED) WIRE RED/WHT WIRE SIG STARTER GENERATOR CONTROL UNIT VIO WIRE VIO/WHT WIRE YEL WIRE

ALARM SIREN AMBIANCE ILLUMINATION CONTROL UNIT BRN WIRE BRN/GRN WIRE COOLANT CIRCULATION PUMP DIAGNOSTIC CONNECTOR DRIVE UNIT CONTROL UNIT DRIVER SIDE ENGINE HOOD CONTACT SWITCH DRIVETRAIN CONTROL UNIT ELECTRONIC IGNITION SWITCH CONTROL UNIT ENGINE FUSE, RELAY MODULE FRONT SAM CONTROL UNIT LEFT FANFARE HORN LEFT FRONT DOOR CONTROL UNIT LOW TEMPERATURE CIRCUIT CIRCULATION PUMP 1 LOWER RADIATOR TRIM FLAP ACTUATOR MOTOR OVERHEAD CONTROL PANEL CONTROL UNIT PARK PAWL CAPACITOR PERIPHERY CAN (CAN PER) POTENTIAL DISTRIBUTOR RIGHT FRONT DOOR CONTROL UNIT RIGHT FRONT LAMP UNIT RIGHT INTERIOR CAN (CAN B) POTENTIAL DISTRIBUTOR SLIDING ROOF CONTROL MODULE STATIONARY HEATER SWITCHOVER VALVE STATIONARY HEATER UNIT UPPER RADIATOR TRIM FLAP ACTUATOR MOTOR USER INTERFACE CAN (CAN HMI) POTENTIAL DISTRIBUTOR W/ INTERIOR MONITORING WINDSHIELD HEATER CONTROL UNIT

AC HOUSING, ANALOG CLOCK BRN WIRE CLIMATE CONTROL OPERATING UNIT CLIMATE CONTROL UNIT DRIVER SEAT CONTROL UNIT DRIVER SEAT HEATER CONTROL UNIT DRIVER SEAT LUMBAR SUPPORT ADJUSTMENT CONTROL UNIT DRIVER SEAT LUMBAR SUPPORT PNEUMATIC PUMP DRIVER SEAT SIDE PRE-SAFE PULSE SQUIB DRIVER SIDE BAG SQUIB FRONT PASSENGER SEAT CONTROL UNIT FRONT PASSENGER SEAT HEATER CONTROL UNIT FRONT PASSENGER SEAT LUMBAR SUPPORT ADJUSTMENT CONTROL UNIT FRONT PASSENGER SEAT LUMBAR SUPPORT PNEUMATIC PUMP FRONT PASSENGER SEAT PARTIALLY ELECTRIC SEAT ADJUSTMENT SWITCH FRONT PASSENGER SEAT SIDE PRE-SAFE PULSE SQUIB FRONT PASSENGER SIDE AIR VENT AMBIANCE ILLUMINATION FRONT PASSENGER SIDE BAG SQUIB FRONT SAM CONTROL UNIT FRONT SEAT HEATER/ SEAT VENTILATION CONTROL UNIT GLOVE BOX LAMP/ SWITCH LEFT FRONT CENTER CONSOLE AMBIANCE ILLUMINATION LEFT FRONT MULTICONTOUR SEAT CONTROL UNIT REAR AIR CONDITIONING OPERATING UNIT RIGHT FRONT MULTICONTOUR SEAT CONTROL UNIT RIGHT FRONT REVERSIBLE EMERGENCY TENSIONING RETRACTOR RIGHT REAR DOOR CONTROL UNIT SEPARATE TRUNK LID LOCK SWITCH UPPER CONTROL PANEL CONTROL UNIT

??? ??? BLK WIRE BLK/BRN WIRE BLU 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 128 FUSE 133 FUSE 200 FUSE 305 GRN WIRE GRN/RED WIRE GRN/WHT WIRE GRY WIRE GRY/BLU WIRE HOT AT ALL TIMES HOT W/ ENGINE COMPARTMENT TERMINAL 15 RELAY ENERGIZED INSTRUMENT CLUSTER LEFT FRONT LAMP UNIT LEFT FRONT LEVEL SENSOR LEFT REAR LEVEL SENSOR OVERHEAD CONSOLE PASSENGER-SIDE A-PILLAR FUSE BOX PNK WIRE PNK/RED WIRE RAIN/LIGHT SENSOR W/ ADDITIONAL FUNCTIONS RED WIRE RED/GRN WIRE RED/YEL WIRE RIGHT FRONT LAMP UNIT SENS SENS (+) SIG 3 SIG SIG (1) SIG (2) SIG 3 SIG 4 VIO WIRE VIO/WHT WIRE WHT/BLK WIRE WHT/YEL WIRE YEL WIRE

BLK WIRE BLK/BRN WIRE BLU 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 128 FUSE 133 FUSE 200 FUSE 305 GRN WIRE GRN/WHT WIRE GRY 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 OVERHEAD CONSOLE PASSENGER-SIDE A-PILLAR FUSE BOX PNK WIRE PNK/RED WIRE RAIN/LIGHT SENSOR W/ ADDITIONAL FUNCTIONS RED WIRE RED/YEL WIRE RIGHT FRONT LAMP UNIT SENS SENS (+) SIG 3 SIG SIG (1) SIG (2) SIG 3 SIG 3 PNK SIG WIRE SIG 4 VIO WIRE VIO/WHT WIRE WHT/BLK WIRE YEL WIRE

58 D BATTERY DISCONNECT SWITCH RELAY BATTERY SENSOR BLK WIRE BLK/WHT WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/RED WIRE BRN/VIO WIRE CAN B H CAN B L CIRCUIT 30 TERMINAL BLOCK COMPUTER DATA LINES SYSTEM DC/DC CONVERTER CONTROL UNIT DRIVER-SIDE FUSE, RELAY MODULE ELECTRONIC IGNITION SWITCH CONTROL UNIT FLEX-E BP PNK FLEX-E BM WIRE FRONT SAM CONTROL UNIT FULLY INTEGRATED TRANSMISSION CONTROL ELECTRIC CONTROL UNIT FUSE 202 FUSE 6 GRN WIRE INTEGRATED STARTER GENERATOR KEYLESS GO START/STOP BUTTON LIN ME-SFI (ME) CONTROL UNIT MPAC U MPAC V MPAC X MPAC Y MPAC Z NCA WIRE ON-BOARD ELECTRICAL SYSTEM BATTERY ORG/ WIRE RED WIRE RED/BLK WIRE RED/WHT (OR RED) WIRE RED/WHT WIRE SIG SIG (1) SIG (2) SIG 3 STARTER GENERATOR CONTROL UNIT STEERING COLUMN MODULE CONTROL UNIT WHT WIRE YEL WIRE