Mercedes-Benz S-class W221 facelift (2009-2013) computer data lines system 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 4 5 6 7 8 9 10 11 12 13 14 SKT (+) SIG 31 MSNT (-) BLK WIRE BLU WIRE BRN WIRE BRN/RED WIRE BRN/VIO WIRE BRN/WHT WIRE CAN B H CAN B L COMPUTER DATA LINES SYSTEM DRIVER LUMBAR SUPPORT REGULATOR CONTROL UNIT (IF EQUIPPED) FUSE 92 PANEL FUSE BOX (UNDER LEFT SIDE DASH COVER) GRN WIRE GRN/BLK WIRE GRN/BLU WIRE GRN/GRY WIRE GRN/PNK WIRE GRN/RED WIRE GRY/BLK WIRE GRY/GRN WIRE GRY/RED WIRE HOT AT ALL TIMES LEFT FRONT HEAD RESTRAINT MOTOR LEFT FRONT SEAT BACKREST ANGLE ADJUSTMENT MOTOR (IN LEFT SEAT BACK) LEFT FRONT SEAT CONTROL MODULE LEFT FRONT SEAT CUSHION FORWARD/BACK MOTOR (UNDER LEFT FRONT SEAT) LEFT FRONT SEAT CUSHION INCLINATION MOTOR (IN LEFT SEAT CUSHION) LEFT FRONT SEAT FORE/AFT ADJUSTMENT MOTOR LEFT FRONT SEAT HEIGHT ADJUSTMENT MOTOR LEFT INSTRUMENT ORG/ WIRE RED WIRE RED/BLU WIRE RED/GRY WIRE RED/VIO WIRE RED/WHT WIRE RED/YEL WIRE SEATS SYSTEM VZ (+) SIG MVZ (-) MVZ (-) MSKT (+) WHT WIRE YEL WIRE YEL/RED WIRE

4 2 3 1 CAN-B H CAN-B L BLK WIRE BLK/WHT WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/RED WIRE BRN/WHT WIRE CAN A H CAN A L CAN B H CAN B L COMAND CONTROL UNIT COMAND DISPLAY COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM W/ MULTICONTOUR SEAT, DYNAMIC SEAT FUSE 127 GRN WIRE GRN/BLK WIRE GRN/BLU WIRE GRN/GRY WIRE GRN/PNK WIRE GRN/RED WIRE GRN/WHT WIRE GRY/BLK WIRE GRY/GRN WIRE GRY/RED WIRE HOT AT ALL TIMES LEFT FRONT SEAT CONTROL MODULE LEFT REAR FOOTWELL LEFT REAR FOOTWELL LAMP LUMBAR PUMP (LEFT SIDE OF TRUNK) NCA WIRE ORG/ WIRE ORG/WHT WIRE REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (CENTER TRUNK) RED WIRE RED/GRN WIRE RED/WHT WIRE RED/YEL WIRE SEATS SEATS SYSTEM SYSTEM SEATS SYSTEM VIO/GRY WIRE W/ LUMBAR SUPPORT SEAT

3 2 1 4 31 CAN-B H CAN-B L 30 3 4 DFK 31 5 4 2 SVS-MOT SVS-MOT (-) 6 5 4 FLAT WIRE FLAT WIRE FLAT WIRE DATA UB 31 9 7 CAN-B H CAN-B L BLK WIRE BLU WIRE BRN WIRE BRN/GRY WIRE BRN/RED WIRE COMPUTER DATA LINES SYSTEM DASH COVER) DRIVER POWER WINDOW OUTSIDE MIRROR, TRUNK LID SWITCH GROUP FLAT WIRE FUSE FUSE 81 GRN WIRE GRY WIRE HOT AT ALL TIMES LEFT FRONT LEFT FRONT DOOR CONTROL MODULE (IN LEFT FRONT DOOR) LEFT FRONT DOOR DOOR TRIM STRIP INSIDE ILLUMINATION HANDLE LAMP 1 ILLUMINATION LEFT FRONT DOOR ENTRANCE/EXIT LAMP LEFT FRONT DOOR LOCK UNIT LEFT FRONT DOOR TRIM STRIP ILLUMINATION LAMP 2 LEFT FRONT DOOR WARNING LAMP LEFT FRONT DRIVE LOCK PAWL SWITCH LEFT FRONT POWER CLOSING MOTOR LEFT FRONT ROTARY TUMBLER SWITCH LEFT FRONT SAFETY LIMIT SWITCH LEFT FRONT SEAT CONTROL MODULE LEFT REAR FOOTWELL LAMP RED WIRE RIGHT INSTRUMENT PANEL FUSE BOX (UNDER RIGHT SIDE TRUNK LID OPEN/CLOSE SWITCH VIO/GRY WIRE W/ POWER CLOSING W/O AMBIANCE ILLUMINATION YEL WIRE

1 2 3 4 CAN-B L CAN-B H 31 30 1 2 4 3 CAN-B L CAN-B H 30 31 2 3 31 DFK 31 31 58 58 31 FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE BLK WIRE BLU WIRE BRN WIRE BRN/RED WIRE BRN/YEL WIRE CAN B L CAN B H COMPUTER DATA LINES SYSTEM CORNERING ILLUMINATION (IF EQUIPPED) FLAT WIRE FRONT CIGAR LIGHTER W/ ASHTRAY ILLUMINATION FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR ENGINE COMPT) GROUND DISTRIBUTION SYSTEM GRY/BLU WIRE GRY/GRN WIRE LEFT FRONT HEADLAMP UNIT LEFT REAR ASHTRAY ILLUMINATION (W/ AMBIANCE ILLUMINATION) LEFT REAR DOOR CONTROL MODULE LEFT REAR DOOR ENTRANCE, EXIT LAMP LEFT REAR DOOR INSIDE HANDLE ILLUMINATION LEFT REAR DOOR LOCK UNIT LEFT REAR DOOR TRIM STRIP ILLUMINATION LEFT REAR DOOR WARNING LAMP LEFT REAR DRIVE LOCK PAWL SWITCH LEFT REAR ROTARY TUMBLER SWITCH LEFT REAR SAFETY LIMIT SWITCH LEFT XENON HEADLAMP CONTROL MODULE NCA WIRE ORG/ WIRE REAR CIGAR LIGHTER RED WIRE RED/WHT WIRE RIGHT FRONT HEADLAMP UNIT RIGHT REAR ASHTRAY ILLUMINATION (W/ AMBIANCE ILLUMINATION) RIGHT REAR DOOR CONTROL MODULE (IN RIGHT REAR DOOR) RIGHT REAR DOOR ENTRANCE/EXIT LAMP RIGHT REAR DOOR INSIDE HANDLE ILLUMINATION RIGHT REAR DOOR LOCK UNIT RIGHT REAR DOOR TRIM STRIP ILLUMINATION RIGHT REAR DOOR WARNING LAMP RIGHT REAR DRIVE LOCK PAWL SWITCH RIGHT REAR FOOTWELL RIGHT REAR SAFETY LIMIT SWITCH RIGHT REAR ROTARY TUMBLER SWITCH RIGHT XENON HEADLAMP CONTROL MODULE SPIEGEL L SPIEGEL R STOWAGE COMPARTMENT ILLUMINATION W/ POWER CLOSING W/O AMBIANCE ILLUMINATION

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 4 5 6 30 31 CAN-B H CAN-B L 1 2 3 4 5 6 7 8 MOT-L MOT-NV MOT-NV MOT-NV MOT-LV 1 2 CAN B L CAN B H 7 8 9 10 11 12 SIBL SIBL (+) (+) 9 10 11 12 13 14 MOT-NV MOT-NV MOT-LV MOT-NV MOT-LV BACKREST SWITCH BLK WIRE BLU WIRE BLU/BLK WIRE BLU/GRN WIRE BLU/PNK WIRE BLU/RED WIRE BRN WIRE BRN/RED WIRE COMPUTER DATA LINES SYSTEM FLAT WIRE FLAT WIRE FLAT WIRE 1 2 3 UB 31 DATA FORE/AFT ADJUSTMENT SWITCH FRONT (OR) REAR SEAT ADJUSTMENT SELECTION SWITCH FUSE 143 FUSE 144 GRN WIRE GRN/BLK WIRE GRN/BLU WIRE GRN/PNK WIRE GRN/YEL WIRE GRY/PNK WIRE HEAD RESTRAINT ADJUSTMENT SWITCH HOT AT ALL TIMES HS LV- HS LV- HS NV+ HS NV+ HS LV+ HS NV+ HS NV+ HS NV+ HS NV- HS NV- LEFT REAR DOOR CONTROL MODULE LEFT REAR HEAD RESTRAINT INCLINATION ADJUSTMENT MOTOR LEFT REAR SEAT CUSHION INCLINATION ADJUSTMENT MOTOR (UNDER LEFT REAR SEAT) LEFT REAR SEAT FORE/AFT ADJUSTMENT MOTOR (UNDER LEFT REAR SEAT) LEFT REAR SEAT OPERATION SWITCH GROUP MOT-NV MOT-LV PNK/BLK WIRE PNK/BRN WIRE PNK/GRN WIRE PNK/RED WIRE PNK/VIO WIRE PNK/WHT WIRE PNK/YEL WIRE REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (CENTER TRUNK) REAR SEATS CONTROL MODULE (RIGHT SIDE OF TRUNK) RED WIRE RED/BLU WIRE RED/GRN WIRE RED/WHT WIRE RIGHT REAR RIGHT REAR DOOR CONTROL MODULE RIGHT REAR HEAD RESTRAINT INCLINATION ADJUSTMENT MOTOR RIGHT REAR SEAT OPERATION SWITCH GROUP RIGHT SEAT FORE/AFT ADJUSTMENT MOTOR (UNDER RIGHT REAR SEAT) SEAT CUSHION INCLINATION ADJUSTMENT MOTOR (UNDER RIGHT REAR SEAT) SEAT CUSHION INCLINATION SWITCH SEATS SYSTEM VIO/BLK WIRE VIO/BLU WIRE VIO/GRY WIRE VIO/WHT WIRE

4 2 3 1 CAN-B H CAN-B L BLK WIRE BLK/WHT WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/BLK WIRE BRN/GRY WIRE BRN/RED WIRE BRN/WHT WIRE CAN A H CAN A L CAN B H CAN B L CAN-B H CAN-B L 30 31 CAN-F H CAN-F L CENTRAL GATEWAY CONTROL MODULE (LEFT FRONT UPPER FOOTWELL) COMAND CONTROL UNIT COMAND DISPLAY COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM W/ MULTICONTOUR SEAT, DYNAMIC SEAT DYNAMIC FRONT PASSENGER SEAT MASSAGE FUNCTION MAIN VALVE FRONT CENTRAL OPERATING UNIT FUSE 127 GRN WIRE GRN/BLU WIRE GRN/WHT WIRE GRY WIRE HOT AT ALL TIMES LEFT REAR FOOTWELL LUMBAR PUMP (LEFT SIDE OF TRUNK) NCA WIRE ORG/ WIRE ORG/WHT WIRE REAR SAM CONTROL MODULE W/ FUSE, RELAY MODULE (CENTER TRUNK) RED WIRE RED/WHT WIRE RED/YEL WIRE RIGHT FRONT DYNAMIC SEAT CONTROL MODULE RIGHT FRONT SEAT MASSAGE FUNCTION ACTUATOR MOTOR W/ LUMBAR SUPPORT SEAT WHT WIRE YEL WIRE YEL/WHT WIRE

ADJUSTMENT SWITCH BACKREST SWITCH BRN WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE CAN B H CAN B L COMPUTER DATA LINES SYSTEM DATA FLAT WIRE FLAT WIRE FLAT WIRE FLAT WIRE FORE/AFT, HEIGHT, INCLINATION FRONT SAM CONTROL MODULE W/ FUSE, RELAY MODULE (LEFT REAR ENGINE COMPT) GRN/BLK WIRE GRN/BLU WIRE GRN/GRY WIRE GRN/PNK WIRE GRN/RED WIRE GRN/WHT WIRE GRY/BLK WIRE GRY/GRN WIRE GRY/RED WIRE HEAD RESTRAINT ADJUSTMENT RED/GRN WIRE RED/WHT WIRE RED/YEL WIRE RIGHT FRONT DOOR CONTROL MODULE (IN RIGHT FRONT DOOR) RIGHT FRONT SEAT CONTROL MODULE RIGHT FRONT SEAT OPERATION SWITCH GROUP RIGHT REAR FOOTWELL LAMP SEAT CUHION FORE/AFT SWITCH SEATS SYSTEM SWITCH VIO/GRY WIRE

BLK WIRE BLU WIRE BRN WIRE BRN/RED WIRE BRN/VIO WIRE CAN B H CAN B L COMPUTER DATA LINES SYSTEM FUSE 102 GRN WIRE GRN/BLK WIRE GRN/BLU WIRE GRN/GRY WIRE GRN/PNK WIRE GRN/RED WIRE GRY/BLK WIRE GRY/GRN WIRE GRY/RED WIRE HOT AT ALL TIMES LEFT INSTRUMENT PANEL FUSE BOX (UNDER LEFT SIDE DASH COVER) ORG/ WIRE RED WIRE RED/BLU WIRE RED/GRY WIRE RED/VIO WIRE RED/YEL WIRE RIGHT FRONT BACKREST ANGLE ADJUSTMENT MOTOR RIGHT FRONT HEAD RESTRAINT MOTOR RIGHT FRONT SEAT BELT COMFORT SOLENOID RIGHT FRONT SEAT CONTROL MODULE RIGHT FRONT SEAT CUSHION FORWARD/BACK MOTOR (UNDER RIGHT FRONT SEAT) RIGHT FRONT SEAT CUSHION INCLINATION MOTOR (IN RIGHT SEAT CUSHION) RIGHT FRONT SEAT FORE/AFT ADJUSTMENT MOTOR (UNDER RIGHT REAR SEAT) RIGHT FRONT SEAT HEIGHT ADJUSTMENT MOTOR SEATS SYSTEM WHT WIRE YEL WIRE YEL/RED WIRE