Mercedes-Benz S-class W221 (2005-2009) 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 BLK WIRE BLK/GRN WIRE BLU WIRE BRN WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE CENTRAL GATEWAY CONTROL MODULE CENTRAL LUMBAR CUSHION PIEZO VALVE CENTRAL LUMBAR CUSHION PRESSURE SENSOR COMPUTER DATA LINES SYSTEM FRONT SAM CONTROL MODULE W/ FUSE/ RELAY MODULE LEFT BACKREST LATERAL SUPPORT CUSHION PIEZO VALVE LEFT BACKREST LATERAL SUPPORT CUSHION PRESSURE SENSOR LEFT FRONT DOOR CONTROL MODULE (IN LEFT FRONT DOOR) LEFT FRONT SEAT BACKREST CUSHION VALVE GROUP LEFT FRONT SEAT OPERATION SWITCH GROUP LOWER LUMBAR CUSHION PIEZO VALVE LOWER LUMBAR CUSHION PRESSURE SENSOR MEMORY 1, 2, 3 SWITCH MEMORY STORE BUTTON SWITCH NCA WIRE ORG/GRN WIRE ORG/WHT WIRE RED/WHT WIRE RIGHT BACKREST LATERAL SUPPORT CUSHION PIEZO VALVE (W/ DYNAMIC SEAT) RIGHT BACKREST LATERAL SUPPORT CUSHION PRESSURE SENSOR (W/ DYNAMIC SEAT) SHOULDER SHOULDER CUSHION CUSHION PRESSURE PIEZO SENSOR VALVE UPPER LUMBAR CUSHION PIEZO VALVE UPPER LUMBAR CUSHION PRESSURE SENSOR WHT WIRE WHT/GRN 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 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 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 LEFT FRONT SEAT CONTROL MODULE LEFT FRONT SEAT CUSHION VENTILATION LEFT FRONT SEAT HEATED CUSHION LEFT FRONT SEAT OPERATION SWITCH GROUP LEFT FRONT SEAT VENTILATION BLOWER REGULATOR (IF EQUIPPED) LEFT INSTRUMENT MOTOR GROUP MOTOR GROUP (IF EQUIPPED) 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 RIGHT FRONT SEAT VENTILATION BLOWER REGULATOR (IF EQUIPPED) SEAT VENTILATION SWITCH YEL/RED WIRE

1 2 3 4 5 6 8 9 7 10 BSM WARN BSM BEREIT 10 8 FLAT WIRE 31 DATA 31 4 3 1 2 30 31 CAN-B L CAN-B H AMBIENT LAMP AMBIENT LAMP FLAT WIRE FLAT WIRE 4 3 AUTOMATIC DIMMING MIRROR BRN WIRE BRN/RED WIRE CAN B L CAN B H COMPUTER DATA LINES SYSTEM DRIVER POWER WINDOW OUTSIDE MIRROR, TRUNKLID SWITCH GROUP FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE 4 3 FLAT WIRE FLAT WIRE 4 9 FLAT WIRE FLAT WIRE 7 5 FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE 1 2 3 UB 31 DATA FLAT WIRE FLAT WIRE FLAT WIRE 4 5 6 31 UB DATA FLAT WIRE FLAT WIRE FLAT WIRE 9 7 6 FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE FOLD IN/ FOLD OUT SWITCH FUSE 70 HOT AT ALL TIMES HOT AT ALL TIMES RIGHT FUSE 80 INSTRUMENT PANEL FUSE BOX LEFT ELECTRICALLY ADJUSTABLE, HEATED EXTERIOR MIRROR LEFT EXTERIOR MIRROR TURN SIGNAL LAMP LEFT FRONT SEAT OPERATION SWITCH GROUP LEFT/RIGHT OUTSIDE MIRROR ADJUSTMENT SELECTION SWITCH MEMORY 1, 2, 3 SWITCH MEMORY STORE BUTTON SWITCH MIRROR ADJUSTMENT ROCKER SWITCH MIRROR FOLD-IN MOTOR MIRROR HEATER MIRROR HEATER FLAT WIRE FLAT WIRE 4 9 MIRROR IN/OUT ADJUST- MENT MOTOR MIRROR UP/DOWN ADJUST- MENT MIRROR IN/OUT ADJUST- MENT MOTOR MIRROR UP/DOWN ADJUST- MENT MOTOR MOTOR FLAT WIRE NCA WIRE RED WIRE RIGHT ELECTRICALLY ADJUSTABLE, HEATED EXTERIOR MIRROR RIGHT EXTERIOR MIRROR TURN SIGNAL LAMP 8 10

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 FLAT WIRE FLAT WIRE FLAT WIRE FRONT PREFUSE FRONT SAM CONTROL MODULE W/ FUSE/ RELAY MODULE FUSE 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 STORE BUTTON SWITCH RAISE/LOWER, FORWARD/ BACKWARD SWITCH RED WIRE RED/WHT WIRE RED/YEL WIRE STEERING COLUMN ADJUSTMENT, STEERING WHEEL HEATER SWITCH STEERING COLUMN FORWARD/BACKWARD MOTOR STEERING COLUMN MODULE (AT TOP OF STEERING COLUMN) STEERING COLUMN RAISE/LOWER MOTOR