Mercedes-Benz C-class W204/S204/С204 facelift (2011-2015) front sam control unit w/ fuse, relay module (left rear of engine compt) Wiring diagrams

2 1 31 SIG 3 1 2 LIN 2 31 3 4 W/ POWER GLASS TILTING/SLIDING SUNROOF 5 1 2 4 30 CAN-B L CAN-B H 31 AMBIENT LAMP AUTOMATIC BLK WIRE BLU WIRE BRN WIRE BRN/GRY WIRE BRN/RED WIRE COMPASS DISPLAY BUTTON COMPASS MODULE W/ DISPLAY (IF EQUIPPED) COMPUTER DATA LINES SYSTEM DIMMING MIRROR FORWARD AUTOMATIC DIMMING MIRROR LIGHT SENSOR FRONT ELECTRICAL PREFUSE BOX (RIGHT REAR OF ENGINE COMPT) FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE FUSE 2 GARAGE DOOR OPENER GARAGE DOOR OPENER BUTTON 1 GARAGE DOOR OPENER INDICATOR LAMP GARAGE GARAGE DOOR DOOR OPENER OPENER BUTTON 2 BUTTON 3 GRN WIRE GRY WIRE GRY/RED WIRE GRY/YEL WIRE HANDSFREE SYSTEM MICROPHONE HOT AT ALL TIMES HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED INSIDE REARVIEW MIRROR LEFT FRONT DOOR CONTROL UNIT LEFT OUTSIDE MIRROR LEFT READING LAMP LIGHT SENSOR (W/O RAIN/LIGHT SENSOR) LIN 2 31 NAVIGATION, SOUND SYSTEMS NCA WIRE ORG/ WIRE PNK WIRE REARWARD AUTOMATIC AUTOMATIC DIMMING DIMMING MIRROR MIRROR LIGHT SENSOR RED/BLU WIRE RED/WHT WIRE RIGHT READING LAMP USED) YEL WIRE

ANT GPS SHIELD BLK WIRE BLU/BLK WIRE BLU/BRN WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/PNK WIRE BLU/VIO WIRE BRN WIRE CAN D H CAN D L CENTER INSTRUMENT PANEL SPEAKER COMAND CONTROL UNIT (W/ COMAND) COMPUTER DATA LINES SYSTEM DIAGNOSTIC CONNECTOR (DLC) (UNDER LEFT SIDE OF DASH) EMERGENCY CALL SYSTEM ANTENNA (CENTER OF HAT SHELF) EMERGENCY CALL SYSTEM BUTTON EMERGENCY CALL SYSTEM CONTROL UNIT (CENTER FRONT TRUNK/CARGO AREA) FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 87 GLOBAL POSITIONING SYSTEM ANTENNA SPLITTER (RIGHT FRONT OF TRUNK/ CARGO AREA) GPS GRY WIRE GRY/BLU WIRE GRY/WHT WIRE HOT AT ALL TIMES INFO MB-INFO, BREAKDOWN ASSISTANCE BUTTON MIKR + MIKR - (-) MULTI-FUNCTION ANTENNA (CENTER REAR OF ROOF) MUTE NCA WIRE OVERHEAD CONTROL PANEL ELECTRONICS (W/O CAN) OVERHEAD CONTROL PANEL CONTROL UNIT RADIO (W/ AUDIO 20) REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (RIGHT SIDE OF TRUNK/CARGO AREA) RED/BLU WIRE SHIELD SIG ANT NOT SHIELD 1 2 SOS LED WS LED INFO LED SOS WS INFO CRASH SOUND SYSTEM AMPLIFIER CONTROL UNIT (LEFT SIDE TRUNK/ CARGO AREA) SUPPLEMENTAL RESTRAINT SYSTEM CONTROL UNIT (UNDER FRONT OF CENTER CONSOLE) TEL TELEDIAGNOSIS W/ NAVIGATION W/ SOUND SYSTEM W/O NAVIGATION W/O SOUND SYSTEM YEL WIRE YEL/BLK WIRE YEL/RED WIRE YEL/VIO WIRE

2 7 8 31 (+) (+) 30 31 CAN-B H CAN-B L BLK/GRY WIRE BLK/VIO WIRE BLOCK BLU WIRE BLU/WHT WIRE BRN WIRE BRN/RED WIRE CAN C H CAN C L COMPUTER DATA LINES SYSTEM DRIVER SEAT CONNECTOR BLOCK FRONT ELECTRICAL PREFUSE BOX (AT RIGHT REAR OF ENGINE COMPT) FRONT PASSENGER SEAT CONNECTOR FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 163 158 FUSE 18 GRY/YEL WIRE HOT AT ALL TIMES HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED LEFT FRONT BACKREST HEATED CUSHION (IF EQUIPPED) LEFT FRONT HEATED SEAT BUTTON LEFT FRONT SEAT SITTING SURFACE HEATED CUSHION (IF EQUIPPED) LIN 1 31 NCA WIRE REAR SAM CONTROL UNIT W/ FUSE, RELAY MODULE (RIGHT SIDE OF RED WIRE RED/GRN WIRE RIGHT FRONT BACKREST HEATED CUSHION (IF EQUIPPED) RIGHT FRONT HEATED SEAT BUTTON RIGHT FRONT SEAT SITTING SURFACE HEATED CUSHION (IF EQUIPPED) STATIONARY HEATER BUTTON TRUNK/CARGO AREA) UPPER CONTROL PANEL CONTROL UNIT W/ ECO START/ STOP FUNCTION W/O ECO START/ STOP FUNCTION

10 9 CAN B L CAN B H 3 2 LWR 7 6 4 5 12 11 10 9 CAN C H CAN C L AUTOMATIC TRANSMISSION MODE BUTTON BLK/PNK WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/RED WIRE COMPUTER DATA LINES SYSTEM EXTERIOR LIGHTS SWITCH FRONT CIGARETTE LIGHTER W/ ASHTRAY ILLUMINATION (W/ SMOKER PACKAGE) FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FRONT VEHICLE INTERIOR POWER OUTLET (W/O SMOKER PACKAGE) FUSE 16 FUSE 28 FUSE 5 GRN WIRE GRY WIRE GRY/BLU WIRE GRY/BRN WIRE HOT AT ALL TIMES HOT W/ CIRCUIT 15 RELAY ENERGIZED HOT W/ ENGINE CIRCUIT 87 RELAY ENERGIZED INSTRUMENT CLUSTER INSTRUMENT ILLUMINATION, INSTRUMENT ILLUMINATION BRIGHTNESS CONTROL LWR NCA WIRE PNK/RED WIRE RED WIRE RED/BLU WIRE RED/YEL WIRE SHIFT GATE SYMBOL ILLUMINATION SWITCH ILLUMINATION W/O XENON LAMPS WHT WIRE YEL WIRE

13 14 15 16 17 18 19 20 SIG SIG HS 1 +12 V 31 2 3 SIG SIG 4 5 SIG SIG 6 1 HS GND 30 RLS BLK WIRE BLU WIRE BLU/WHT WIRE BRN WIRE CAN B L COMPUTER DATA LINES SYSTEM FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) GRN WIRE GRY WIRE HALL SENSOR 1 HALL SENSOR 2 HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED FUSE 17 OVERHEAD CONTROL PANEL ELECTRONICS (C-CLASS: CENTER REAR OF TRUNK) PANORAMIC SLIDING ROOF CONTROL MODULE (LEFT FRONT OF ROOF) PANORAMIC SLIDING ROOF CONTROL UNIT PANORAMIC SLIDING ROOF HALL SENSOR 1 PANORAMIC SLIDING ROOF HALL SENSOR 2 PANORAMIC SLIDING ROOF MOTOR PNK WIRE PNK/GRN WIRE RED WIRE RED/BLU WIRE RED/WHT WIRE VIO WIRE VIO/WHT WIRE YEL WIRE YEL/RED WIRE

3 2 SIG SIG 30 RLS 5 4 SIG SIG 5 6 8 7 9 10 31 HS 1 HS 2 HS (+) MOTOR - MOTOR + 9 10 6 7 30 31 CAN B L CAN B H BLK WIRE BLK/GRY WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/RED WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) GRN WIRE GRN/WHT WIRE GRY WIRE HALL SENSOR 1 HALL SENSOR 2 HOT AT ALL TIMES FUSE 17 OVERHEAD CONTROL PANEL CONTROL UNIT (W/ POWER GLASS TILTING/SLIDING SUNROOF) OVERHEAD CONTROL PANEL ELECTRONICS (C-CLASS: CENTER REAR OF TRUNK) PANORAMIC SLIDING ROOF CONTROL MODULE (LEFT FRONT OF ROOF) PANORAMIC SLIDING ROOF CONTROL UNIT PANORAMIC SLIDING ROOF HALL SENSOR 1 PANORAMIC SLIDING ROOF HALL SENSOR 2 PANORAMIC SLIDING ROOF MOTOR RED WIRE RED/BLU WIRE RED/WHT WIRE ROOF FRONT OF ROOF) MOTOR SEAT) AREA) SENSOR 1 HALL SENSOR 2 HALL SIG SIG HS 2 SIG HS 1 TILTING/ SLIDING ROOF DRIVE UNIT (GLK-CLASS: CENTER TILTING/ SLIDING ROOF SWITCH VIO WIRE W/ POWER GLASS TILTING/SLIDING SUNROOF W/ PANORAMIC SLIDING ROOF WHT WIRE YEL WIRE

1 3 30 LIN 1 2 4 3 31 (+) (-) 31 30 CAN B L CAN B H BRN WIRE BRN/RED WIRE CAN B H CAN B L COMPUTER DATA LINES SYSTEM FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 12 GRN WIRE GRY WIRE GRY/YEL WIRE HOT AT ALL TIMES LIN 1 REAR SAM CONTROL UNIT W/ FUSE, RELAY MODULE (RIGHT SIDE OF TRUNK/CARGO AREA) REAR WINDOW ROLLER SUN BLIND BUTTON REAR WINDOW ROLLER SUN BLIND MOTOR (CENTER OF HAT SHELF) RED WIRE RED/GRN WIRE UPPER CONTROL PANEL CONTROL UNIT W/O ECO START/ STOP BUTTON W/ ECO START/ STOP BUTTON WHT WIRE YEL WIRE

1.8L TURBO 2.1L TURBO DIESEL 3 4 CAN B H CAN B L 3.5L 41 40 CAN C H CAN C L BATTERY SENSOR (C-CLASS: ON BATTERY) (GLK CLASS: ON BATTERY NEGATIVE POST) BLK WIRE BLU WIRE BLU/RED WIRE BLU/WHT WIRE BRN WIRE BRN/RED WIRE CAN C H CAN C H CAN C L CAN C L CHARGING CIRCUIT COMPUTER DATA LINES SYSTEM D- D+ ELECTRONIC IGNITION SWITCH CONTROL UNIT ELECTRONIC SELECTOR LEVER MODULE CONTROL MODULE (A/T) (UNDER CENTER CONSOLE) ELECTRONIC TRANSMISSION CONTROL UNIT FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 25 FUSE 7 HOT W/ CIRCUIT 15 RELAY ENERGIZED ON-BOARD ELECTRICAL SYSTEM BATTERY POWER DISTRIBUTION SYSTEM RED WIRE RED/BLU WIRE RELAY STARTER STARTER CIRCUIT STR+ VIO WIRE VIO/WHT WIRE

1 2 3 4 5 6 CAN C H CAN C L 1 2 CAN-C L CAN-C H 17 18 CAN B L CAN B H 2 3 CAN-C L CAN-C H 31 CAN C L CAN C H 31 SIG 4 3 CAN B L CAN B H 87 GND AUTOMATIC TRANSMISSION MODE BUTTON AUTOMATIC TRANSMISSION NEUTRAL POSITION SWITCH (BASE OF SHIFT LEVER ASSEMBLY) BLU WIRE BLU/WHT WIRE BRN WIRE BRN/RED WIRE CAN C H CAN C L CLUTCH CONTROL SOLENOID COMPUTER DATA LINES SYSTEM D- D+ ELECTRIC STEERING LOCK CONTROL UNIT (STEERING COLUMN) ELECTRONIC IGNITION SWITCH CONTROL UNIT ELECTRONIC SELECTOR LEVER MODULE CONTROL MODULE (C-CLASS: UNDER CENTER CONSOLE) FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FULLY SELECTION INTEGRATED RANGE TRANSMISSION SENSOR CONTROL UNIT FUSE GEAR INDICATOR GEAR INDICATOR SENSOR 1 2 3 4 5 6 7 8 9 10 11 12 13 14 GRN WIRE GRN/WHT WIRE GRY/BLU WIRE HOT W/ CHASSIS CIRCUIT 87 RELAY ENERGIZED HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED INSTRUMENT CLUSTER INTERNAL OUTPUT TRANSMISSION SHAFT SPEED RPM RPM SENSOR SENSOR MULTIDISK MULTIDISK BRAKE BRAKE CONTROL CONTROL SOLENOID SOLENOID PNK/RED WIRE PRND R/P S (+) R/P S (-) RED/BLK WIRE RED/BLU WIRE RED/GRN WIRE SELECT LEVER POSITIONS R, P LOCKING SOLENOID SHIFT GATE SYMBOL ILLUMINATION (IF EQUIPPED) STEERING COLUMN MODULE CONTROL UNIT (INTEGRAL TO STEERING COLUMN MODULE) TIPP (MASSE) TIPP (PLUS) TIPP (-) TIPP (+) TRANSMISSION MODE DISPLAY TRANSMISSION OIL TEMPERATURE SENSOR TURBINE WHEEL RPM SENSOR W/ KEYLESS GO SYSTEM W/O KEYLESS GO SYSTEM WHT WIRE WHT/GRN WIRE WORKING PRESSURE CONTROL SOLENOID VALVE YEL WIRE

-1 +2 1 2 3 4 5 6 7 8 9 10 GND GND 1-2, 3-4, 5-6, 7-8) 4 2 1 5 31 CAN B H CAN B L 30 BLK/WHT WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/RED WIRE BRN/YEL WIRE CAN B H CAN B L CAN B L CAN B H COMPUTER DATA LINES SYSTEM FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 2 FUSE 61 GND SIG GRN/BLK WIRE GRN/BLU WIRE GRN/GRY WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/BLU WIRE GRY/PNK WIRE HFE HOT AT ALL TIMES HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED LEFT FRONT DOOR CONTROL UNIT (FRONT OF LEFT FRONT DOOR) NCA WIRE ORG/ WIRE ORG/GRN WIRE REAR SAM CONTROL UNIT W/ FUSE, RELAY MODULE (RIGHT SIDE OF TRUNK) RED/WHT WIRE RED/YEL WIRE RIGHT TAILGATE CONTROL OBSTRUCTION SENSOR STRIP (RIGHT SIDE OF TAILGATE) SIG SIG SIG TAILGATE CENTRAL LOCKING MOTOR TAILGATE CONTROL BUTTON (W/ AUTOMATIC TAILGATE, KEYLESS GO SYSTEM) TAILGATE CONTROL DRIVE UNIT TAILGATE CONTROL MAGNETIC CLUTCH TAILGATE CONTROL POSITION SENSOR TAILGATE CONTROL TAILGATE ELECTRIC CONTROL MOTOR HALL SENSOR TAILGATE CONTROL UNIT (GLK-CLASS) TAILGATE CONTROL WARNING BUZZER (BOTTOM OF TAILGATE) TAILGATE EXTERNAL OPERATION SWITCH TAILGATE LOCKING ELEMENT (GLK-CLASS) TRUNK LID EMERGENCY OPENING SWITCH (TRUNK LID) W/ AUTOMATIC TAILGATE W/O AUTOMATIC TAILGATE WHT WIRE WHT/BLU WIRE WHT/YEL WIRE YEL WIRE