Mercedes-Benz S-class W221 facelift (2009-2013) upper control panel control unit Wiring diagrams

1 2 CAN-C L CAN-C H COMPUTER DATA LINES SYSTEM 10 6 12 4 1 30 CAN-B L CAN-B H 30 31 55 42 CAN-C L CAN-C H AUTOMATIC CHILD SEAT RECOGNITION AIR BAG OFF IND LAMP BLK WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/GRY WIRE BRN/RED WIRE CAN H H CAN H L CAN-F H CAN-F L COCKPIT SWITCH GROUP COMAND COMAND DISPLAY DISPLAY SWIVEL SWIVEL LEFT RIGHT SWITCH SWITCH COMAND DISPLAY DIMMER BRIGHTNESS CONTROL COMPUTER DATA LINES SYSTEM DTR CONTROL UNIT DTR RADAR SENSOR DTR WARNING LAMP IND ELECTRIC CONTROL UNIT (VGS) ESP LEVEL OFF ADJUSTMENT SWITCH SWITCH EXTERIOR LIGHTS, INSTRUMENT CLUSTER SYSTEM FREELY PROGRAMMABLE BUTTON FRONT CENTRAL OPERATING UNIT FUSE 66 GRN WIRE GRY WIRE GRY/RED WIRE GRY/YEL WIRE HAZARD WARNING SYSTEM BUTTON HOT W/ CHASIS CIRCUIT 87 RELAY ENERGIZED INSTRUMENT CLUSTER ME-SFI (ME) CONTROL MODULE (RIGHT REAR OF ENGINE COMPT) OUTPUT SPEED SENSOR PTS OFF SWITCH RED WIRE RED/BLK WIRE RED/GRN WIRE RED/WHT WIRE SIG UPPER CONTROL PANEL CONTROL UNIT VIO WIRE VIO/WHT WIRE YEL WIRE YEL/BLK WIRE YEL/WHT WIRE

1 12 6 2 8 7 31 CAN-B H CAN-B L 31 12 13 CAN-F L CAN-F H 15 16 CAN-B H CAN-B L BRN WIRE BRN/GRY WIRE BRN/RED WIRE BRN/YEL WIRE COCKPIT SWITCH GROUP COMPUTER DATA LINES SYSTEM EXTERIOR LAMP SWITCH FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR ENGINE COMPT) FUSE 6 PREFUSE BOX (RIGHT REAR ENGINE COMPT) GRY/RED WIRE GRY/YEL WIRE HCS (SRA) SWITCH HCS PUMP (LEFT FRONT WHEELWELL) HOT AT ALL TIMES INSTRUMENT CLUSTER LIN BUS RED WIRE RED/GRY WIRE UPPER CONTROL PANEL CONTROL UNIT YEL WIRE YEL/WHT WIRE

1 2 3 4 5 6 7 8 9 10 11 12 31 31 FRB VL 30 HSK BEL CAN-B L 1 3 2 NIGHT VISION ASSIST BUTTON 2 4 5 10 7 9 SW 6 SW 4 CAN G L CAN G H SW 3 SW 1 ANALOG CLOCK ATA(EDW) FUNCTION INDICATOR AUTOMATIC CHILD SEAT RECOGNITION AIRBAG OFF IND LAMP BLU WIRE BRAKE FLUID INDICATOR SWITCH (LEFT REAR OF ENGINE COMPT) BRN WIRE BRN/GRY WIRE BRN/RED WIRE BRN/WHT WIRE CAN B H COCKPIT SWITCH GROUP COMAND DISPLAY BRIGHTNESS CONTROL COMPUTER DATA LINES SYSTEM CRUISE CONTROL SYSTEM DEFROST/ HEATED WINDSHIELD BUTTON ELECTRIC PARKING BRAKE CONTROL UNIT (LEFT REAR WHEELWELL) ELECTRIC PARKING BRAKE SWITCH ESP OFF SWITCH FRB VR 30 GRN WIRE GRN/BRN WIRE GRN/WHT WIRE GRY WIRE GRY/BLU WIRE GRY/BRN WIRE GRY/RED WIRE GRY/YEL WIRE HEATED REAR WINDOW BUTTON INTERIOR LIGHTS SYSTEM COMPUTER DATA LINES SYSTEM LEFT AUTOMATIC AIR CONDITIONING BUTTON LEFT BLOWER BUTTON LEFT TEMPERATURE SELECTION BUTTON LEVEL ADJUSTMENT SWITCH NIGHT VIEW ASSIST DISPLAY BRIGHTNESS CONTROL SWITCH, CONTROLS ILLUMINATION OFF/ RESIDUAL HEAT BUTTON OVERHEAD CONTROL PANEL CIRCUIT PTS LEFT COMAND OFF DISPLAY SWITCH SWIVEL SWITCH RED WIRE RED/BLK WIRE RED/WHT WIRE RIGHT AIR BLOWER RECIRCULATION BUTTON BUTTON RIGHT AUTOMATIC AIR CONDITIONING BUTTON RIGHT COMAND DISPLAY SWIVEL SWITCH RIGHT TEMPERATURE SELECTION BUTTON ROTARY LIGHT SWITCH SIG STH/ZUH/ RESIDUAL HEAT BUTTON UPPER CONTROL PANEL CONTROL UNIT VIO/BRN WIRE YEL WIRE YEL/BLK WIRE YEL/GRN WIRE YEL/RED WIRE

A/C AIR RECIRCULATION UNIT BATTERY MANAGEMENT SYSTEM CONTROL UNIT BATTERY SENSOR BLK RED/ WIRE BLK WIRE BLU WIRE BLU/YEL WIRE BRN WIRE CAN I H CAN I L COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM PYROTECHNICAL SEPARATOR DATA LINK CONNECTOR ELECTRIC REFRIGERANT COMPRESSOR ELECTRIC SUCTION FAN ENGINE, A/C W/ INTEGRATED CONTROL FROM ENGINE COMPARTMENT PREFUSE BOX (DIAGRAM 1 OF 4) FROM FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (DIAGRAM 3 OF 4) FROM LEFT INSTRUMENT PANEL FUSE BOX (DIAGRAM 3 OF 4) FUSE 10 FUSE 3 FUSE 10 FUSE 9 FUSE 36 FUSE 38 FUSE 37 FUSE 29 FUSE 39 FUSE 4 FUSE 3 FUSE 5 FUSE 54 FUSE 6 FUSE 6 FUSE 2 FUSE 7 FUSE 8 FUSE 9 GENERATOR GRN WIRE HEATED WINDSHIELD CONTROL MODULE (W/ SPECIAL PROTECTION) HV- INSTRUMENT CLUSTER NCA WIRE PNK WIRE PNK/GRN WIRE PNK/RED WIRE POWER ELECTRONICS CONTROL UNIT QUIESCENT CURRENT CUTOUT RELAY RED WIRE RED/BLK WIRE RED/BRN WIRE RED/GRN WIRE RED/WHT WIRE RED/YEL WIRE STARTER CIRCUIT 15 RELAY TO CHASSIS CIRCUIT 87 RELAY (DIAGRAM 3 OF 4) TO CIRCUIT TO EIS (EZS) CONTROL UNIT (DIAGRAM 4 OF 4) TO FRONT SAM CONTROL MODULE STARTER W/ FUSE, RELAY MODULE (DIAGRAM 1 OF 4) TO FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (DIAGRAM 3 OF 4) TO LEFT INSTRUMENT PANEL FUSE BOX (DIAGRAM 3 OF 4) TO REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (DIAGRAM 2 OF 4) TO REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (DIAGRAM 3 OF 4) TO RIGHT INSTRUMENT PANEL FUSE BOX (DIAGRAM 2 OF 4) TO SPECIAL PROTECTION VEHICLE ADDITIONAL FUSE HOLDER (DIAGRAM 2 OF 4) UPPER CONTROL PANEL CONTROL UNIT VACUUM PUMP ON-BOARD ELECTRICAL SYSTEM BATTERY RELAY (+) (W/ MILD HYBRID DRIVE) YEL WIRE