Mercedes-Benz S-class W221 facelift (2009-2013) left front seat operation switch group Wiring diagrams

1 2 3 FLAT WIRE FLAT WIRE FLAT WIRE UB 31 DATA 1 2 CAN B L CAN B H 12 11 16 15 CAN-F L CAN-F H CAN-B L CAN-B H 16 15 CAN-B L CAN-B H 26 25 CAN-B L CAN-B H 3 6 CAN-A L CAN-A H BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE CAN-B H CAN-B L 30 31 CENTRAL GATEWAY CONTROL MODULE (LEFT FRONT UPPER FOOTWELL) COMPUTER DATA LINES SYSTEM DYNAMIC DRIVER SEAT MASSAGE FUNCTION MAIN VALVE FORE/AFT,HIEGHT, INCLINATION ADJUSTMENT SWITCH BACKREST SWITCH FRONT CENTRAL OPERATING UNIT FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR ENGINE COMPT) GRN WIRE GRY WIRE HEAD RESTRAINT ADJUSTMENT SWITCH LEFT FRONT DOOR CONTROL MODULE (IN LEFT FRONT DOOR) LEFT FRONT DYNAMIC SEAT CONTROL MODULE LEFT FRONT SEAT MASSAGE FUNCTION ACTUATOR MOTOR LEFT FRONT SEAT OPERATION SWITCH GROUP RED WIRE RED/WHT WIRE SEAT CUSHION FORE/AFT SWITCH WHT WIRE YEL WIRE YEL/WHT WIRE

1 2 3 FLAT WIRE FLAT WIRE FLAT WIRE UB 31 DATA 1 2 7 9 30 31 CAN-B L CAN-B H 1 2 CAN B L CAN B H 2 7 9 31 CAN-B L CAN-B H BLU WIRE BRN WIRE BRN/BLU WIRE BRN/GRN WIRE BRN/RED WIRE BRN/VIO WIRE COMPUTER DATA LINES SYSTEM FUSE 102 FUSE 92 PANEL FUSE BOX (UNDER LEFT SIDE DASH COVER) GRN/RED WIRE GRN/WHT WIRE HEATED SEAT SWITCH HOT AT ALL TIMES LEFT FRONT BACKREST HEATED CUSHION LEFT FRONT DOOR CONTROL MODULE (IN LEFT FRONT DOOR) LEFT FRONT SEAT BACKREST VENTILATION MOTOR GROUP (IF EQUIPPED) LEFT FRONT SEAT CONTROL MODULE LEFT FRONT SEAT CUSHION VENTILATION LEFT FRONT SEAT HEATED CUSHION LEFT FRONT SEAT OPERATION SWITCH GROUP LEFT INSTRUMENT MOTOR GROUP RED WIRE RED/BLU WIRE RED/GRN WIRE RED/VIO WIRE RIGHT FRONT BACKREST HEATED CUSHION RIGHT FRONT DOOR CONTROL MODULE (IN RIGHT FRONT DOOR) RIGHT FRONT SEAT BACKREST VENTILATION MOTOR GROUP (IF EQUIPPED) RIGHT FRONT SEAT CONTROL MODULE RIGHT FRONT SEAT CUSHION VENTILATION MOTOR GROUP RIGHT FRONT SEAT HEATED CUSHION RIGHT FRONT SEAT OPERATION SWITCH GROUP SEAT VENTILATION SWITCH YEL/RED WIRE

1 2 3 4 5 6 8 9 7 10 BSM WARN BSM BEREIT 1 2 3 FLAT WIRE FLAT WIRE FLAT WIRE UB 31 DATA 31 DATA 31 4 3 1 2 30 31 CAN-B L CAN-B H 4 5 6 FLAT WIRE FLAT WIRE FLAT WIRE 31 UB DATA AMBIENT LAMP AUTOMATIC DIMMING MIRROR BLK WIRE BRN WIRE BRN/RED WIRE CAN B L CAN B H COMPUTER DATA LINES SYSTEM DRIVER POWER WINDOW OUTSIDE MIRROR, TRUNK LID SWITCH GROUP FLAT WIRE FLAT WIRE FLAT WIRE FOLD IN/ FOLD OUT SWITCH FUSE 70 HOT AT ALL TIMES LEFT ELECTRICALLY ADJUSTABLE, HEATED OUTSIDE MIRROR LEFT FRONT SEAT OPERATION SWITCH GROUP LEFT OUTSIDE MIRROR TURN SIGNAL LAMP LEFT/RIGHT OUTSIDE MIRROR ADJUSTMENT SELECTION SWITCH MEMORY 1, 2, 3 SWITCH MEMORY SWITCH MIRROR ADJUSTMENT ROCKER SWITCH MIRROR FOLD-IN MOTOR MIRROR HEATER MIRROR IN/OUT ADJUST- MENT MOTOR MIRROR UP/DOWN ADJUST- MENT MIRROR IN/OUT ADJUST- MENT MOTOR MIRROR UP/DOWN ADJUST- MENT MOTOR MOTOR NCA WIRE RED WIRE RIGHT ELECTRICALLY ADJUSTABLE, HEATED OUTSIDE MIRROR RIGHT OUTSIDE MIRROR TURN SIGNAL LAMP

1 2 3 FLAT WIRE FLAT WIRE FLAT WIRE 1 2 CAN B L CAN B H 10 11 CAN-E H CAN-E L 14 5 13 11 12 9 3 1 7 H+ GND MLS- MLS+ H+ GND MLS- MLS+ 31 16 15 CAN-B L CAN-B H 3 2 1 DATA 31 UB BLK/WHT WIRE BLK/YEL WIRE BRN WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM ENGINE COMPARTMENT PREFUSE BOX FLAT WIRE FLAT WIRE FLAT WIRE FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR ENGINE COMPT) FUSE (RIGHT REAR ENGINE COMPT) GRN WIRE GRN/WHT WIRE GRN/YEL WIRE HOT AT ALL TIMES LEFT FRONT DOOR CONTROL MODULE (IN LEFT FRONT DOOR) LEFT FRONT SEAT OPERATION SWITCH GROUP MEMORY 1, 2, 3 SWITCH MEMORY SWITCH RAISE/LOWER, FORWARD/ BACKWARD SWITCH RED WIRE RED/WHT WIRE RED/YEL WIRE STEERING COLUMN IN/OUT MOTOR STEERING COLUMN MODULE (TOP OF STEERING COLUMN) STEERING COLUMN UP/DOWN MOTOR