Mercedes-Benz GLS-class X166 (2015-2019) steering column module control unit Wiring diagrams

ABS IND. BFS BLA BLU/BLK WIRE BLU/WHT WIRE BRAKE FLUID LEVEL SWITCH BRAKE SYSTEM WARNING IND LAMP BRN WIRE BRN/RED WIRE CAN B H CAN B L COCKPIT CIRCUIT 30 FUSE BOX COMPUTER DATA LINES SYSTEM DIGITAL TACHOGRAPH CONTROL UNIT DOWNHILL SPEED REGULATION BUTTON ESP OFF BUTTON ESP WARNING IND LAMP ESP/ASR OFF WARNING IND LAMP FUSE 12 FUSE 15 FUSE 20 GRN WIRE GRN/BLK WIRE GRN/WHT WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT W/ INSTRUMENT CLUSTER INSTRUMENT CLUSTER SYSTEM LEFT FRONT AXLE RPM SENSOR LEFT REAR AXLE RPM SENSOR LOW RANGE BUTTON LOWER CONTROL PANEL CONTROL UNIT NCA WIRE OFF ROAD PROGRAM BUTTON OFF-ROAD OPERATING PANEL CONTROL UNIT ON-ROAD/ OFF ROAD MENU BUTTON PARKING BRAKE IND LAMP PNK/WHT WIRE RED/BLK WIRE RED/WHT WIRE RELAY ENERGIZED RIGHT FRONT AXLE RPM SENSOR RIGHT REAR AXLE RPM SENSOR STEERING COLUMN MODULE CONTROL UNIT STEERING WHEEL ANGLE SENSOR UPPER CONTROL PANEL CONTROL UNIT VIO WIRE VIO/BLK WIRE WHT WIRE

ACCEPT/TERMINATE PHONE CALL BUTTON AUDIO/COMAND CONTROL PANEL AUDIO/COMAND CONTROLLER BACK BUTTON BACK, VOICE CONTROL SYSTEM OFF BUTTON BATTERY COMPARTMENT PREFUSE BOX BLK WIRE BLK/WHT WIRE BLU WIRE BLU/BLK WIRE BRN WIRE BUTTONS +, - FOR SETTING SPECIFIC FUNCTIONS, VOLUME CONTROL CAN A H CAN A L COMPUTER DATA LINES SYSTEM DELETE BUTTON FUSE 1 FUSE 21 FUSE 5 FUSE 50 GRN WIRE GRN/WHT WIRE HOT AT ALL TIMES HOT W/ CIRCUIT L OK LEFT FREE PROGRAMMING BUTTON LEFT MULTI-FUNCTION STEERING WHEEL BUTTON GROUP MULTIPLE FUSE 1 MULTIPLE FUSE 2 MUTE FUNCTION BUTTON MUTE SBS TEL ANSWER/ END CALL NCA WIRE OK BUTTON ORG/ WIRE R RETURN RED/BLK WIRE RED/WHT WIRE RIGHT FREE PROGRAMMING BUTTON RIGHT MULTI-FUNCTION STEERING WHEEL BUTTON GROUP SCROLL FORWARD/BACK BUTTON STEERING COLUMN MODULE CONTROL UNIT STEERING WHEEL CLOCK SPRING CONTACT STEERING WHEEL ELECTRONICS SYSTEM SELECTION BUTTON U MFL L U MFL R UP/DOWN VOICE CONTROL SYSTEM ON BUTTON WHT WIRE

4.7L TURBO 4.7L TURBO 3.5L, 3.5L FLEX, 3.0L TURBO ACCELERATE, SET SWITCH ACCELERATOR PEDAL SENSOR ACTUAL VALVE POTENTIOMETER 1 ACTUAL VALVE POTENTIOMETER 2 ACTUATOR MOTOR BLK WIRE BLK/BLU WIRE BLS H BLS L BLS M 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 H H CAN H L CDI CONTROL UNIT (2.1L TURBO DIESEL) COMPUTER DATA LINES SYSTEM CRUISE CONTROL LEVER DECELERATE, SET SWITCH DISTRONIC CONTROL DISTRONIC CONTROLLER UNIT DISTRONIC ELECTRIC CONTROLLER UNIT DISTRONIC RADAR SENSOR DISTRONIC WARNING LAMP IND ELECTRONIC STABILITY PROGRAM CONTROL UNIT ENGINE COMPARTMENT FUSE, RELAY MODULE FULLY INTEGRATED TRANSMISSION CONTROL UNIT FUSE 20 FUSE 213 FUSE 234 GRN WIRE GRN/WHT WIRE GRY WIRE GRY/BLU WIRE HOT AT ALL TIMES HOT W/ HOT W/ CIRCUIT 15 RELAY ENERGIZED IND SWITCH INSTRUMENT CLUSTER OFF SWITCH ORG/ WIRE OUTPUT SHAFT RPM SENSOR PNK WIRE PNK/BLK WIRE PNK/VIO WIRE POTI SIG POWER DISTRIBUTION SYSTEM RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE RELAY ENERGIZED RESUME FROM MEMORY SWITCH S VREF 3 STEERING COLUMN MODULE CONTROL UNIT STOP LAMP SWITCH THROTTLE VALVE ACTUATOR U PWG VIO WIRE VIO/BLK WIRE VIO/BLU WIRE VIO/WHT WIRE W/ DISTRONIC PLUS WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/BRN WIRE

BACKUP LAMPS CIRCUIT BLK WIRE BLK/GRN WIRE BLK/WHT WIRE BLS H BLS L BLS M BLU WIRE BLU/BLK WIRE BLU/WHT WIRE BRN WIRE CAN H H CAN H L COMBINATION SWITCH COMPUTER DATA LINES SYSTEM ELECTRONIC STABILITY PROGRAM CONTROL UNIT ENGINE COMPARTMENT FUSE, RELAY MODULE ENGINE COMPARTMENT PREFUSE BOX FUSE 1 FUSE 211 GRN WIRE GRN/BLK WIRE GRN/WHT WIRE GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/YEL WIRE HOT AT ALL TIMES INNER RIGHT REAR LAMP UNIT OUTER TURN SIGNAL LAMP OVERHEAD CONTROL PANEL CONTROL UNIT PNK/BLK WIRE RAIN/LIGHT SENSOR (TOP CENTER OF WINDSHIELD) RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE RIGHT BACKUP LAMP RIGHT FRONT LAMP UNIT (W/ LED HEADLAMP) RIGHT FRONT LAMP UNIT (W/O LED HEADLAMP) RIGHT FRONT SIDE MARKER LAMP RIGHT HEADLAMP CONTROL UNIT RIGHT INSIDE TAILLIGHT RIGHT LED SIGNALING LIGHTS ACTUATION FAN MOTOR MODULE RIGHT PARKING LIGHT, STANDING LIGHT, DAYTIME RUNNING LIGHT STEERING COLUMN MODULE CONTROL UNIT STOP LAMP SWITCH (TOP OF BRAKE PEDAL ASSEMBLY) TURN SIGNAL LAMPS SWITCH VIO WIRE VIO/BLK WIRE VIO/WHT WIRE WHT/BLU WIRE

BLK WIRE BRN WIRE COMPUTER DATA LINES SYSTEM FUSE 20 GRN WIRE GRN/WHT WIRE HEATING ELEMENT TEMPERATURE SENSOR HOT W/ NCA WIRE NTC- PNK/BLU WIRE RED/BLK WIRE RELAY ENERGIZED STEERING COLUMN ADJUSTMENT SWITCH STEERING COLUMN ADJUSTMENT, STEERING WHEEL HEATER SWITCH STEERING COLUMN MODULE CONTROL UNIT STEERING WHEEL CLOCK SPRING CONTACT STEERING WHEEL ELECTRONICS STEERING WHEEL HEATER STEERING WHEEL HEATER HEATING ELEMENT STEERING WHEEL HEATER INDICATOR LAMP STEERING WHEEL HEATER SWITCH W/ STEERING WHEEL HEATER, AUTOMATIC LANE RECOGNITION, ACTIVE LANE KEEPING ASSIST

ANTI-THEFT ALARM SYSTEM/EMERGENCY CALL SYSTEM BUTTON GROUP BLK/BLU WIRE BLU WIRE BLU/BLK WIRE BLU/WHT WIRE BRN WIRE BRN/RED WIRE CAN B H CAN B L COMBINATION SWITCH COMPUTER DATA LINES SYSTEM DIGITAL TACHOGRAPH CONTROL UNIT EXTERIOR LIGHTS SWITCH FRONT CENTER CONSOLE CUPHOLDER ILLUMINATION FRONT CENTER CONSOLE ILLUMINATION FRONT CIGARETTE LIGHTER W/ ASHTRAY ILLUMINATION FUSE 114 FUSE 152 FUSE 20 FUSE 250 GRN WIRE GRN/WHT WIRE GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/WHT WIRE GRY/YEL WIRE HEADLAMP FLASHER/ HIGH BEAM SWITCH HOT AT ALL TIMES HOT W/ CIRCUIT HOT W/ CIRCUIT 15 RELAY ENERGIZED INTERIOR PREFUSE BOX LDS 1 LDS 2 LDS 3 LIFTGATE CONTROL BUTTON SYMBOL ILLUMINATION NCA WIRE OVERHEAD CONTROL PANEL CONTROL UNIT REAR CONTROL UNIT REAR FUSE BOX RED WIRE RED/BLK WIRE RED/WHT WIRE SAM CONTROL UNIT (RIGHT KICK PANEL) STEERING COLUMN MODULE CONTROL UNIT SWITCH ILLUMINATION TAILGATE CONTROL BUTTON W/ INTERIOR LIGHTS PACKAGE WHT WIRE WHT/YEL WIRE

15 RELAY (DIAGRAM 4 OF 4) 2.1L TURBO DIESEL EXCEPT 2.1L TURBO DIESEL ACTIVE ROLL STABILIZATION CONTROL UNIT ADDITIONAL BATTERY BLK WIRE BLU WIRE BLU/GRY WIRE BOOSTER BLOWER ELECTRONIC BLOWER CONTROLLER BRN WIRE BRN/BLK WIRE BRN/RED WIRE BUFFER BATTERY FUSE CAN B H CAN B L CAN-D H CAN-D L COCKPIT CIRCUIT 30 FUSE BOX COMPUTER DATA LINES SYSTEM CONTROL UNIT) DC/AC CONVERTER CONTROL UNIT DIAGNOSTIC CONNECTOR ECO START/STOP FUNCTION ADDITIONAL BATTERY ECO START/STOP FUNCTION ADDITIONAL BATTERY RELAY ELECTRONIC IGNITION SWITCH CONTROL UNIT ENGINE COMPARTMENT FUSE, RELAY MODULE FROM BATTERY COMPARTMENT PREFUSE BOX (DIAGRAM 1 OF 4) FROM CIRCUIT FROM CIRCUIT 15 RELAY (DIAGRAM 4 OF 4) FROM REAR FUSE BOX (DIAGRAM 4 OF 4) FRONT PASSENGER SEAT OCCUPIED RECOGNITION, ACSR FULLY INTEGRATED TRANSMISSION CONTROL UNIT FUSE 10 FUSE 11 FUSE 12 FUSE 13 FUSE 134 FUSE 135 FUSE 136 FUSE 137 FUSE 138 FUSE 14 FUSE 15 FUSE 157 FUSE 16 FUSE 17 FUSE 18 FUSE 213 GLE CLASS GLOVE BOX LAMP) GRN WIRE GRN/BLU WIRE GRN/WHT WIRE GRY WIRE GRY/WHT WIRE INTELLIGENT SERVO MODULE FOR DIRECT SELECT LEFT FRONT DOOR CONTROL UNIT N/A NCA WIRE NOT P ORG/BLK WIRE ORG/BLU WIRE PNK WIRE RBA REAR WINDOW WIPER RELAY RED WIRE RED/WHT WIRE RETROFIT HEAD UP DISPLAY, INSTRUMENT CLUSTER SAM CONTROL UNIT SOCKET MICRO SWITCH STEERING COLUMN MODULE CONTROL UNIT SUPPLEMENTAL RESTRAINT SYSTEM TAILGATE WIPER MOTOR TK FT TO REAR FUSE BOX (DIAGRAM 4 OF 4) UPPER CONTROL PANEL CONTROL UNIT W/ AUTOMATIC AIR CONDITIONING W/ ECO START/STOP FUNCTION W/O ECO START/STOP FUNCTION 9 SPEED A/T 6 SPEED A/T 6 WEIGHT SENSING SYSTEM (WSS) CONTROL UNIT WHT WIRE YEL WIRE YEL/WHT WIRE

360 DEGREE CAMERA CONTROL UNIT, BACKUP CAMERA 7 SPEED A/T AIRMATIC RELAY ALARM SIREN AUDIO/ COMAND DISPLAY AUTOMATIC AIR CONDITIONING CONTROL, OPERATING UNIT BACKUP RELAY BLK WIRE BLU WIRE BRN WIRE CELLULAR TELEPHONE SYSTEM ANTENNA AMPLIFIER/COMPENSATOR (W/ COMFORT TELEPHONY) CHASSIS GATEWAY CONTROL UNIT CIRCUIT 15 RELAY COMAND CONTROL UNIT COMAND FAN MOTOR COOLANT RUN-ON PUMP RELAY DISTRONIC ELECTRIC CONTROLLER UNIT DRIVER SEAT CONTROL UNIT DVD PLAYER ELECTRONIC STABILITY PROGRAM CONTROL UNIT ENGINE COMPARTMENT FUSE, RELAY MODULE FANFARE HORN RELAY FROM BATTERY COMPARTMENT PREFUSE BOX (DIAGRAM 1 OF 4) FROM ENGINE COMPARTMENT PREFUSE BOX (DIAGRAM 1 OF 4) FROM MULTIPLE FUSE 1 (DIAGRAM 1 OF 4) FRONT LONG RANGE RADAR SENSOR FRONT PASSENGER SEAT CONTROL UNIT FUSE 1 FUSE 100 FUSE 101 FUSE 102 FUSE 103 FUSE 104 FUSE 105 FUSE 106 FUSE 19 FUSE 2 FUSE 20 FUSE 201 FUSE 202 FUSE 203 FUSE 204 FUSE 206 FUSE 207 FUSE 208 FUSE 209 FUSE 21 FUSE 210 FUSE 211 FUSE 22 FUSE 221 FUSE 223 FUSE 224 FUSE 225 FUSE 226 FUSE 227 FUSE 228 FUSE 229 FUSE 230 FUSE 231 FUSE 232 FUSE 233 FUSE 234 FUSE 236 FUSE 237 FUSE 241 FUSE 3 FUSE 4 FUSE 5 FUSE 6 INTELLIGENT SERVO MODULE FOR DIRECT SELECT LEFT FRONT LAMP UNIT LEFT FRONT LAMP UNIT, RIGHT FRONT LAMP UNIT LEFT REAR DISPLAY MOBILEPHONE CONTROL PLATE MULTI-FUNCTION CAMERA MULTIMEDIA CONNECTION UNIT MULTIPLE FUSE 2 MULTIPLE FUSE 3 MULTIPLE FUSE 4 N/A N/A N/A PNK WIRE RADAR SENSORS CONTROL UNIT RCP (HBF) CONTROL UNIT RED WIRE RIGHT FRONT LAMP UNIT RIGHT FRONT LAMP UNIT, LEFT FRONT LAMP UNIT RIGHT REAR DISPLAY SAM CONTROL UNIT SPRAY NOZZLE HOSE HEATER RELAY STARTER CIRCUIT 50 RELAY STATIONARY HEATER UNIT STEERING COLUMN MODULE CONTROL UNIT TAILGATE CONTROL UNIT TIRE PRESSURE MONITOR CONTROL UNIT TUNER UNIT TURBOCHARGER RELAY W/ COMAND W/ LED HEADLAMPS W/ REAR ENTERTAINMENT W/O DISTRONIC PLUS W/O LED HEADLAMPS WHT WIRE WINDSHIELD WIPER ON/OFF RELAY WIPER PARK POSITION HEATER RELAY YEL WIRE

ACCELERATE, ACCEPT/TERMINATE PHONE CALL BUTTON ALDW - BACK, VOICE CONTROL SYSTEM OFF BUTTON BLK WIRE BLU WIRE BRN WIRE BUTTONS +, - FOR SETTING SPECIFIC FUNCTIONS, VOLUME CONTROL CENTER HORNS BUTTON COCKPIT CIRCUIT 30 FUSE BOX COMBINATION SWITCH COMPUTER DATA LINES SYSTEM CRUISE CONTROL LEVER DECELERATE, SET SWITCH DIRECT SELECT LEVER DISTRONIC CONTROL DRIVER AIR BAG SQUIB 1 DRIVER AIR BAG SQUIB 2 FUSE 11 FUSE 20 GRN WIRE GRN/WHT WIRE HEADLAMP FLASHER/ HIGH BEAM SWITCH HEATING ELEMENT TEMPERATURE SENSOR HOT AT ALL TIMES INDICATOR SWITCH L OK LEFT FANFARE HORN SYSTEM BUTTON LEFT MULTI-FUNCTION STEERING WHEEL BUTTON GROUP LIFTGATE WINDSHIELD WASHER SYSTEM SWITCH LOW BEAM SWITCH LSP + MUTE FUNCTION BUTTON MUTE SBS NCA WIRE NTC- OFF SWITCH OK BUTTON PNK/BLU WIRE R RETURN RED WIRE RED/BLK WIRE RED/WHT WIRE RELAY ENERGIZED RESUME FROM MEMORY SWITCH RIGHT FANFARE HORN SYSTEM BUTTON RIGHT MULTI-FUNCTION STEERING WHEEL BUTTON GROUP SCROLL FORWARD/BACK BUTTON SET SWITCH STEERING COLUMN ADJUSTMENT SWITCH STEERING COLUMN ADJUSTMENT, STEERING WHEEL HEATER SWITCH STEERING COLUMN MODULE CONTROL UNIT STEERING WHEEL ANGLE SENSOR STEERING WHEEL CLOCK SPRING CONTACT STEERING WHEEL DOWNSHIFT BUTTON (IF EQUIPPED) STEERING WHEEL ELECTRONICS STEERING WHEEL HEATER STEERING WHEEL HEATER HEATING ELEMENT STEERING WHEEL HEATER INDICATOR LAMP (IF EQUIPPED) STEERING WHEEL HEATER SWITCH (IF EQUIPPED) STEERING WHEEL UPSHIFT BUTTON (IF EQUIPPED) STEERING WHEEL VIBRATION MOTOR SUPPLEMENTAL RESTRAINTS SYSTEM SYSTEM SELECTION BUTTON TURN SIGNAL LAMPS SWITCH U MFL L TEL ANS/ END CALL UP/DOWN GND U MFL R UP/DOWN VIO WIRE VOICE CONTROL SYSTEM ON BUTTON W/ STEERING WHEEL HEATER, AUTOMATIC LANE RECOGNITION, ACTIVE LANE KEEPING ASSIST WINDSHIELD WASHER SYSTEM SWITCH WIPE SWITCH YEL WIRE

BLK WIRE BRN WIRE BRN/RED WIRE CAN B H CAN B H RBA CAN B L COMPUTER DATA LINES SYSTEM DRIVER SEAT CONTROL UNIT FUSE 102 FUSE 127 FUSE 20 FUSE 253 GRN WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE HOT AT ALL TIMES HOT W/ CIRCUIT HS SIG HS(+) INTERIOR PREFUSE BOX LEFT FRONT DOOR CONTROL UNIT LEFT FRONT MEMORY 1 SWITCH LEFT FRONT MEMORY 2 SWITCH LEFT FRONT MEMORY 3 SWITCH LEFT FRONT MEMORY FUNCTION SWITCH LEFT FRONT SEAT ADJUSTMENT SWITCH GROUP MLS H MLS V ORG/ WIRE REAR FUSE BOX RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE STEERING COLUMN ADJUSTMENT SWITCH STEERING COLUMN ADJUSTMENT, STEERING WHEEL HEATER SWITCH STEERING COLUMN IN/OUT ADJUSTMENT MOTOR, HALL SENSOR STEERING COLUMN MODULE CONTROL UNIT STEERING COLUMN UP/DOWN ADJUSTMENT MOTOR, HALL SENSOR VIO WIRE WHT WIRE