Mercedes-Benz C-class W204/S204 (2006-2011) front sam control unit w/ fuse, relay module (left rear of engine compt) Wiring diagrams

3 1 2 LIN 2 31 AMBIENT LAMP AUTOMATIC DIMMING MIRROR BLU WIRE BRN WIRE BRN/GRY WIRE BRN/RED WIRE CAN B L CAN B H CENTER OF WINDSHIELD) COMPUTER DATA LINES SYSTEM FORWARD AUTOMATIC DIMMING MIRROR LIGHT SENSOR FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 17 GARAGE DOOR OPENER GARAGE DOOR OPENER 1 GARAGE DOOR OPENER 2 GARAGE GARAGE DOOR DOOR OPENER OPENER 3 INDICATOR LAMP GRN WIRE GRY WIRE GRY/RED WIRE GRY/YEL WIRE HOT AT ALL TIMES INSIDE REARVIEW MIRROR LEFT RIGHT READING READING LAMP LAMP LIGHT SENSOR (STANDARD) RAIN/LIGHT SENSOR (OPTIONAL) (RAIN/LIGHT SENSOR: TOP LIN 2 31 OPTIONAL PNK WIRE REARWARD AUTOMATIC DIMMING MIRROR LIGHT SENSOR RED/BLU WIRE YEL WIRE

1 2 3 4 5 6 7 8 HR+ VR+ 1 2 3 4 MOST OUT MOST IN 6 4 2 1 PNK WIRE ANST ANT BT SHIELD ANT GPS SHIELD AUDIO/COMAND DISPLAY AUX GND AUX R AUX JACK ELECTRICAL CONNECTOR AUX SHIELD AUX L BLK WIRE BLK/WHT WIRE BLU WIRE BLU/BLK WIRE BLU/WHT WIRE BLUETOOTH ANTENNA BRN WIRE BRN/GRN WIRE BRN/ORG WIRE BRN/PNK WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE CAN A L CAN A H DIAG (+) CAN B H 31 ON/OFF CAN B L COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM FM, AM, CL ANTENNA AMPLIFIER (CENTER FRONT OF ROOF) FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 26 FUSE 16 GPS GPS 1 GRN WIRE GRN/WHT WIRE GRN/YEL WIRE HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED HR- VR- INSTRUMENT CLUSTER, AUDIO/COMAND DISPLAY FAN MOTOR (UNDER LEFT SIDE OF DASH) LEFT FRONT DOOR BASS SPEAKER LEFT FRONT DOOR SPEAKER (W/O SOUND SYSTEM) LEFT FRONT DOOR TWEETER MOBILE PHONE ELECTRICAL CONNECTOR MULTI-FUNCTION ANTENNA NCA NCA WIRE NCA WIRE ORG/ WIRE ORG/WHT WIRE PNK 1 2 3 4 5 6 7 8 9 10 11 12 MIC 1+ MIC 2+ SHIELD WIRE PNK WIRE RADIO W/ AUTO PILOT SYSTEM REAR WINDOW ANTENNA AMPLIFIER 1 (CENTER REAR OF ROOF) RED WIRE RED/WHT RED WIRE RED/WHT WIRE RED/YEL WIRE RIGHT FRONT DOOR BASS SPEAKER RIGHT FRONT DOOR SPEAKER (W/O SOUND SYSTEM) RIGHT FRONT DOOR TWEETER SHIELD SHIELD FM 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 SOUND SYSTEMS VIO WIRE VL HL VL+ HL+ PNK WIRE VOICE CONTROL SYSTEM MICROPHONE W/ MODEL CODE 204.0 W/ MODEL CODE 204.2 WAKE-UP WHT WIRE WHT/YEL WIRE YEL WIRE

1 2 3 4 5 6 7 8 HR+ VR+ 1 2 3 4 MOST OUT MOST IN 6 4 2 1 PNK WIRE ANST AUDIO/COMAND DISPLAY AUX JACK ELECTRICAL CONNECTOR BLK WIRE BLK/WHT WIRE BLU WIRE BLU/BLK WIRE BLU/WHT WIRE BRN WIRE BRN/GRN WIRE BRN/ORG WIRE BRN/PNK WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE CAN A L CAN A H DIAG (+) CAN B H 31 ON/OFF CAN B L COMAND CONTROL UNIT COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM EMERGENCY CALL SYSTEM CONTROL UNIT (CENTER FRONT OF TRUNK) FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 26 FUSE 16 GND MIC - AUX GND AUX R GRN WIRE GRN/WHT WIRE GRN/YEL WIRE HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED HR- VR- INSTRUMENT CLUSTER, AUDIO/COMAND DISPLY FAN MOTOR (UNDER LEFT SIDE OF DASH) LEFT REAR DOOR SPEAKER (W/O SOUND SYSTEM) MOBILE PHONE ELECTRICAL CONNECTOR NCA NCA WIRE NCA WIRE ORG/ WIRE ORG/WHT WIRE PNK 1 2 3 4 5 6 7 8 9 10 11 12 MIC 1+ MIC 2+ SHIELD MIC + AUX SHIELD AUX L WIRE PNK WIRE RED WIRE RED/WHT RED WIRE RED/WHT WIRE RED/YEL WIRE RIGHT REAR DOOR SPEAKER (W/O SOUND SYSTEM) SOUND SYSTEMS VIO WIRE VL HL VL+ HL+ PNK WIRE VOICE CONTROL SYSTEM MICROPHONE W/ MOBILE PHONE PRE INSTALLATION W/O MOBILE PHONE PRE INSTALLATION WAKE-UP WHT WIRE WHT/YEL WIRE YEL WIRE

1 2 3 4 5 6 7 8 HR+ VR+ 1 2 3 4 MOST OUT MOST IN 6 4 2 1 PNK WIRE ANST AUDIO/COMAND DISPLAY AUX JACK ELECTRICAL CONNECTOR BLK WIRE BLK/WHT WIRE BLU WIRE BLU/BLK WIRE BLU/WHT WIRE BRN WIRE BRN/GRN WIRE BRN/ORG WIRE BRN/PNK WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE CAN A L CAN A H DIAG (+) CAN B H 31 ON/OFF CAN B L COMAND CONTROL UNIT COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM EMERGENCY CALL SYSTEM CONTROL UNIT (CENTER FRONT OF TRUNK) FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 26 FUSE 16 GND MIC - AUX GND AUX R GRN WIRE GRN/WHT WIRE GRN/YEL WIRE HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED HR- VR- INSTRUMENT CLUSTER, AUDIO/COMAND DISPLY FAN MOTOR (UNDER LEFT SIDE OF DASH) LEFT REAR DOOR SPEAKER (W/O SOUND SYSTEM) MOBILE PHONE ELECTRICAL CONNECTOR NCA NCA WIRE NCA WIRE ORG/ WIRE ORG/WHT WIRE PNK 1 2 3 4 5 6 7 8 9 10 11 12 MIC 1+ MIC 2+ SHIELD MIC + AUX SHIELD AUX L WIRE PNK WIRE RED WIRE RED/WHT RED WIRE RED/WHT WIRE RED/YEL WIRE RIGHT REAR DOOR SPEAKER (W/O SOUND SYSTEM) SOUND SYSTEMS VIO WIRE VL HL VL+ HL+ PNK WIRE VOICE CONTROL SYSTEM MICROPHONE W/ MOBILE PHONE PRE INSTALLATION W/O MOBILE PHONE PRE INSTALLATION WAKE-UP WHT WIRE WHT/YEL WIRE YEL WIRE

ANT GPS SHIELD BLK WIRE BLK/YEL 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 COMPUTER DATA LINES SYSTEM DIAGNOSTIC CONNECTOR (UNDER LEFT SIDE OF DASH) ELECTRONICS (W/O CAN) EMERGENCY CALL SYSTEM ANTENNA (CENTER OF HAT SHELF) EMERGENCY CALL SYSTEM BUTTON EMERGENCY CALL SYSTEM CONTROL UNIT (CENTER FRONT OF TRUNK) FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 83 (LEFT SIDE OF TRUNK/CARGO AREA) FUSE 87 GLOBAL POSITIONING SYSTEM ANTENNA SPLITTER (RIGHT FRONT OF TRUNK) GPS GRY WIRE GRY/BLU WIRE GRY/WHT WIRE HOT AT ALL TIMES HOT W/ CIRCUIT INFO MB-INFO, BREAKDOWN ASSISTANCE BUTTON MIKR + MIKR - (-) KEEP ON MULTI-FUNCTION ANTENNA MUTE NCA WIRE OVERHEAD CONTROL PANEL CONTROL MODULE (W/ CAN) OVERHEAD CONTROL PANEL REAR SAM CONTROL UNIT W/ FUSE, RELAY MODULE 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 OF TRUNK) SUPPLEMENTAL RESTRAINT SYSTEM CONTROL UNIT (UNDER FRONT OF CENTER CONSOLE) TEL TELEDIAGNOSIS VIO WIRE 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 BLU WIRE BLU/WHT WIRE BRN WIRE BRN/RED WIRE CAN C H CAN C L COMPUTER DATA LINES SYSTEM CONTROL UNIT) DRIVER SEAT CONTACTING STRIP FRONT PASSENGER SEAT CONTACTING FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 12 GRY/YEL WIRE HOT AT ALL TIMES LEFT FRONT BACKREST HEATED CUSHION (IF EQUIPPED) LEFT FRONT HEATED SEAT BUTTON LEFT FRONT SEAT SITTING SURFACE HEATED CUSHION (IF EQUIPPED) LIN 1 31 REAR SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT 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) STRIP TRUNK/CARGO AREA) UPPER CONTROL PANEL

1 2 3 4 5 6 7 8 9 10 11 12 WH (-) (-) SV WH (DATA) BLK/GRN WIRE BLK/PNK WIRE BLK/WHT WIRE BLK/YEL WIRE BLU/BRN WIRE BLU/YEL WIRE BRN WIRE BRN/BLU WIRE BRN/RED WIRE BRN/YEL WIRE CAN B L CAN B H (-) SH WV (-) 31 CAN E H CAN E L CENTER LEFT FRONT PARKTRONIC DISTANCE SENSOR CENTER RIGHT FRONT PARKTRONIC DISTANCE SENSOR COMPUTER DATA LINES SYSTEM FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 59 UNIT W/ FUSE, RELAY MODULE (LEFT SIDE OF TRUNK/CARGO AREA) GRN WIRE GRN/WHT WIRE GRY/YEL WIRE HOT AT ALL TIMES INNER LEFT FRONT PARKTRONIC DISTANCE SENSOR INNER LEFT REAR PARKTRONIC DISTANCE SENSOR INNER RIGHT FRONT PARKTRONIC DISTANCE SENSOR INNER RIGHT REAR PARKTRONIC DISTANCE SENSOR INSTRUMENT PANEL PARKTRONIC WARNING INDICATOR LIN 1 OUTER LEFT FRONT PARKTRONIC DISTANCE SENSOR OUTER LEFT REAR PARKTRONIC DISTANCE SENSOR OUTER RIGHT FRONT PARKTRONIC DISTANCE SENSOR OUTER RIGHT REAR PARKTRONIC DISTANCE SENSOR PARKTRONIC BUTTON PARKTRONIC CONTROL UNIT PNK/RED WIRE REAR PARKTRONIC WARNING INDICATOR REAR SAM CONTROL UPPER CONTROL PANEL CONTROL MODULE W V (DATA) WH (+) (+) SV WHT/RED WIRE WHT/YEL WIRE YEL/RED WIRE YEL/VIO WIRE YEL/WHT 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 CAN B H CAN B L COMPUTER DATA LINES SYSTEM DRIVE UNIT 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 MODULE (W/ POWER GLASS TILTING/SLIDING SUNROOF) OVERHEAD CONTROL PANEL ELECTRONICS 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 PANORAMIC SLIDING ROOF ROLLER SUN BLIND DRIVE UNIT RED WIRE RED/BLU WIRE RED/WHT WIRE ROOF MOTOR SENSOR 1 HALL SENSOR 2 HALL SIG SIG HS 2 SIG HS 1 SUN BLIND MOTOR TILTING/ SLIDING ROOF TILTING/ SLIDING ROOF SWITCH VIO WIRE W/ OVERHEAD CONTROL PANEL WHT WIRE YEL WIRE

1 2 MOST MOST OUT MOST IN 31 30 WAKE UP 31 CAN A H CAN A L AUDIO/ COMAND CONTROLLER AUDIO/COMAND CONTROL PANEL AUDIO/COMAND DISPLAY BACK BUTTON BLK WIRE BLK/WHT WIRE BLU WIRE BLU/BLK WIRE BLU/BRN WIRE BLU/VIO WIRE BLU/WHT WIRE BRN WIRE BRN/GRY WIRE CAN A H CAN A L 31 CAN A L GND SND RTN CAN A H CENTER INSTRUMENT PANEL SPEAKER COMAND CONTROL UNIT COMPUTER DATA LINES SYSTEM DELETE BUTTON EMERGENCY CALL SYSTEM CONTROL UNIT (IF EQUIPPED) FRONT SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT REAR OF ENGINE COMPT) FUSE 11 FUSE 84 MODULE (LEFT SIDE OF TRUNK/CARGO AREA) GRN WIRE GRN/WHT WIRE GRY WIRE HOT AT ALL TIMES HOT W/ QUIESCENT CURRENT CUTOUT RELAY ENERGIZED LCT MOST DATA BUS CIRCUIT MULTI-FUNCTION ANTENNA NCA WIRE ORG/ WIRE ORG/WHT WIRE RADIO W/ AUTO PILOT SYSTEM REAR SAM CONTROL UNIT W/ FUSE, RELAY RED WIRE RED/BLK WIRE RED/BLU WIRE RED/BRN WIRE RED/GRY WIRE RED/VIO WIRE RED/WHT WIRE SAT 1 2 3 4 SATELLITE DIGITAL AUDIO RADIO (SDAR) CONTROL UNIT SHIELD ANT W/O AUDIO 50 WHT WIRE YEL/BLK WIRE

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 LIN 1 31 REAR SAM CONTROL UNIT W/ FUSE, RELAY MODULE (LEFT SIDE OF TRUNK/CARGO AREA) REAR WINDOW ROLLER SUN BLIND BUTTON REAR WINDOW ROLLER SUN BLIND MOTOR (IF EQUIPPED) (CENTER OF HAT SHELF) RED WIRE RED/GRN WIRE UPPER CONTROL PANEL CONTROL UNIT WHT WIRE YEL WIRE