Mercedes-Benz R-class W251 facelift (2007-2010) nca Wiring diagrams
This page contains all the electrical diagrams for the component. nca, in which he is found in the car Mercedes-Benz R-class W251 facelift (2007-2010). You can view various wiring diagrams where this component is used, as well as go to more detailed diagrams to see the complete connection and interaction in the system. All diagrams have links to quickly jump to the corresponding section with the component for easy viewing..
nca wiring diagram (21 of 41)
1 2 3 5 31 SIG 1
3 1 2 5 6 GND OR IR- IR+ IR DATA
35 36 CAN-B L CAN-B H
4 1 2 5 30 CAN-B H CAN-B L 31
BLU WIRE
BRN WIRE
BRN/RED WIRE
CND
COMPUTER DATA LINES SYSTEM
DRIVER OPEN & CLOSED SWITCH (W/ AUTOMATIC REAR END DOOR)
FRONT PASSENGER POWER WINDOW SWITCH
FUSE 26 RELAY BOX (RIGHT REAR OF CARGO AREA)
FUSE 34
GRN WIRE
GRY/BLK WIRE
HORNS SYSTEM
HOT AT ALL TIMES
LEFT FRONT DOOR CL MOTOR (REAR OF LEFT FRONT DOOR)
LEFT FRONT DOOR CONTROL MODULE (IN FRONT OF LEFT FRONT DOOR)
LEFT FRONT DOOR ENTRANCE, EXIT LAMP
LEFT FRONT DOOR INSIDE HANDLE ILLUMINATION
LEFT FRONT IR RECEIVER
LEFT FRONT KEYLESS GO DOOR HANDLE
LEFT INTERIOR CL [ZV] SWITCH
LOAD COMPARTMENT FUSE,
NCA WIRE
PNK/BLK WIRE
RED WIRE
RED/BLK WIRE
RIGHT FRONT DOOR CL MOTOR (REAR OF RIGHT FRONT DOOR)
RIGHT FRONT DOOR CONTROL MODULE (IN FRONT OF RIGHT FRONT DOOR)
RIGHT FRONT DOOR ENTRANCE, EXIT LAMP
RIGHT FRONT DOOR INSIDE HANDLE ILLUMINATION
RIGHT FRONT KEYLESS GO DOOR HANDLE (W/ KEYLESS GO)
RIGHT INTERIOR CL [ZV] SWITCH
SIG (2)
VIO/BLK WIRE
W/KEYLESS GO W/O IR REMOTE CONTROL
W/O KEYLESS GO W/ IR REMOTE CONTROL
WHT WIRE
WHT/BLK WIRE
Go to component -> Automatic door locks circuit (1 of 2) -> NCA WIRE
nca wiring diagram (22 of 41)
1 2 3 4 CAN B L CAN-B H SIG
10 11 BEL 31
12 13 30 AUF
26 16 CAN-B-L CAN-B-H
ATA (EDW) HOOD SWITCH (RIGHT FRONT OF ENGINE COMPT)
BLU WIRE
BRN WIRE
BRN/RED WIRE
CAN-B H CAN-B L
COMPUTER DATA LINES SYSTEM
DOOR CONTACT ON, OFF SWITCH
FUSE 40 RELAY BOX (RIGHT REAR OF CARGO AREA)
GRN/BLK WIRE
GRN/BLU WIRE
GRY WIRE
HOT AT ALL TIMES
LEFT REAR END DOOR CLOSING OBSTRUCTION SENSOR STRIP (IN LEFT "D" PILLAR)
LOAD COMPARTMENT FUSE,
MHK
NCA WIRE
ORG/ WIRE
OVERHEAD CONTROL PANEL MODULE
REAR DOOR HYDRAULIC PUMP
REAR END DOOR CLOSING CONTROL MODULE (LEFT REAR OF CARGO AREA)
REAR END DOOR CLOSING WARNING BUZZER (LEFT SIDE OF TAILGATE)
REAR END DOOR OPENING ANGLE RECOGNITION SENSOR
REAR SAM CONTROL MODULE (RIGHT REAR OF CARGO AREA)
RED WIRE
RED/BLU WIRE
RIGHT REAR END DOOR CLOSING OBSTRUCTION SENSOR STRIP (IN RIGHT "D" PILLAR)
RWT
RWTS BUTTON
SIG
WHT/BLU WIRE
Go to component -> Automatic door locks circuit (2 of 2) -> NCA WIRE
nca wiring diagram (23 of 41)
1 2 3 4 LHZ FAF 31 DIAG
1 2 GND NTC
10 11 CAN H CAN L
5 6 CAN-B L CAN-B H
BRN WIRE
BRN/RED WIRE
COMPUTER DATA LINES SYSTEM
FANFARE HORNS, AIRBAG CLOCK SPRING CONTACT
GRN WIRE
GRN/WHT WIRE
HEATER COIL
HEATER COIL TEMP SENS
HOT AT ALL TIMES COCKPIT FUSE BOX (BEHIND RIGHT END OF DASH) FUSE 13
HS (SIH), SEAT VENTILATION, STEERING WHEEL HEATER CONTROL UNIT
MULTIFUNCTION STEERING WHEEL ELECTRONICS UNIT (INSIDE STEERING WHEEL)
NCA WIRE
RED WIRE
RED/BLU WIRE
STEERING COLUMN ADJUSTMENT/STEERING WHEEL HEATER SWITCH
STEERING WHEEL HEATER
STEERING WHEEL HEATER FUNCTION INDICATOR LAMP
STEERING WHEEL HEATER SWITCH
STEERING WHEEL HEATER/FANFARE HORNS ELECTRONICS
VIO/BLK WIRE
Go to component -> Heated steering wheel circuit -> NCA WIRE
nca wiring diagram (24 of 41)
1 2 3 4 5 6 7 8 ANT GND
ANT GND
BLK WIRE
BLK/WHT WIRE
BLU WIRE
BLU/BLK WIRE
BLU/WHT WIRE
BRN WIRE
BRN/BLK WIRE
BRN/RED WIRE
BRN/WHT WIRE
CAN B H
CAN B L
COCKPIT KEYLESS GO ANTENNA (UNDER FRONT OF CENTER FLOOR CONSOLE)
COMPUTER DATA LINES SYSTEM
GND GND GND GND GND GND GND GND
GRN/BLK WIRE
GRN/BLU WIRE
HR VR HL VL
INTERIOR KEYLESS GO ANTENNA (CENTER REAR OF FLOOR)
KEYLESS GO CONTROL MODULE (RIGHT REAR OF CARGO AREA)
KEYLESS GO LEFT REAR DOOR ANTENNA (IN LEFT REAR DOOR)
KEYLESS GO RIGHT REAR DOOR ANTENNA (IN RIGHT REAR DOOR)
KEYLESS GO TRUNK ANTENNA (LEFT SIDE OF TAILGATE)
LEFT FRONT KEYLESS GO DOOR HANDLE
LEFT REAR KEYLESS GO DOOR HANDLE
NCA WIRE
PNK/BLK WIRE
PNK/WHT WIRE
RED WIRE
RED/BLK WIRE
RED/WHT WIRE
RIGHT FRONT KEYLESS GO DOOR HANDLE
RIGHT REAR KEYLESS GO DOOR HANDLE
ROOF ANTENNA MODULE (CENTER REAR OF ROOF)
WHT WIRE
WHT/BLK WIRE
YEL/BLK WIRE
YEL/WHT WIRE
Go to component -> Keyless go system circuit -> NCA WIRE
nca wiring diagram (25 of 41)
1 3 2 PNK WIRE
12 13 14 15 16 17 33 34 35 36 37 38 31 (-) SV DATA
4 3 CAN B L CAN B H
BLK WIRE
BLK/BLU WIRE
BLU WIRE
BRN WIRE
BRN/RED WIRE
CAN B L CAN B H
CENTER LEFT FRONT PTS ULTRASONIC SENSOR (LEFT SIDE OF FRONT BUMPER)
CENTER RIGHT FRONT PTS ULTRASONIC SENSOR (RIGHT SIDE OF FRONT BUMPER)
CIRCUIT 31 LEFT FOOTWELL VOLTAGE DISTRIBUTOR CONNECTOR 1
COMPUTER DATA LINES SYSTEM
DATA
INNER LEFT FRONT PTS ULTRASONIC SENSOR (LEFT CENTER OF FRONT BUMPER)
INNER LEFT REAR PTS ULTRASONIC SENSOR (LEFT SIDE OF REAR BUMPER)
INNER RIGHT FRONT PTS ULTRASONIC SENSOR (RIGHT CENTER OF FRONT BUMPER)
INNER RIGHT REAR PTS ULTRASONIC SENSOR (RIGHT SIDE OF REAR BUMPER)
INSTRUMENT PANEL DRIVER SIDE PTS WARNING DISPLAY
NCA WIRE
ORG/ WIRE
OUTER LEFT FRONT PTS ULTRASONIC SENSOR (LEFT CORNER OF FRONT BUMPER)
OUTER LEFT REAR PTS ULTRASONIC SENSOR (LEFT CORNER OF REAR BUMPER)
OUTER RIGHT FRONT PTS ULTRASONIC SENSOR (RIGHT CORNER OF FRONT BUMPER)
OUTER RIGHT REAR PTS ULTRASONIC SENSOR (RIGHT CORNER OF REAR BUMPER)
PNK WIRE
PNK/WHT WIRE
PTS CONTROL MODULE (UNDER DRIVER'S SEAT)
PTS OFF SWITCH
REAR DOME LAMP PTS WARNING DISPLAY
RED WIRE
RED/WHT WIRE
UPPER CONTROL PANEL CONTROL MODULE
VIO/WHT WIRE
YEL WIRE
YEL/BLU WIRE
YEL/WHT WIRE
Go to component -> Parktronic circuit -> NCA WIRE
nca wiring diagram (26 of 41)
1 2 5 4 CAN-B L CAN-B H 31 30
2 1 5 4 CAN-B L CAN-B H 31 30
8 7 6 GND GND
AUTOMATIC DIMMING MIRROR
BLK WIRE
BRN WIRE
BRN/RED WIRE
CLOSE VENT WINDOW SWITCH
COMPUTER DATA LINES SYSTEM
DEFOGGER SYSTEM
DRIVER POWER WINDOW, OUTSIDE MIRROR ADJUSTMENT SWITCH GROUP
EXTERIOR INTERIOR LIGHTS LIGHTS SYSTEM SYSTEM
EXTERIOR MIRROR FOLD IN/ FOLD OUT SWITCH
FUSE 26
FUSE 34
HOT AT ALL TIMES
INTERIOR DEFOGGER LIGHTS SYSTEM SYSTEM
LEFT ELECTRICALLY ADJUSTABLE, HEATED EXTERIOR MIRROR
LEFT FRONT DOOR CONTROL MODULE (IN LEFT FRONT DOOR)
LEFT FRONT POWER WINDOW SWITCH
LEFT LEFT EXTERIOR OUTSIDE MIRROR MIRROR TURN AMBIENT SIGNAL LAMP LAMP
LEFT OUTSIDE MIRROR ADJUSTMENT SELECTION SWITCH
LEFT REAR POWER WINDOW SWITCH
LOAD COMPARTMENT FUSE, RELAY BOX (RIGH REAR OF CARGO AREA)
MIRROR IN/OUT MOTOR
MIRROR MIRROR HEATER FOLD IN MOTOR
MIRROR UP/DOWN MOTOR
NCA WIRE
OPEN VENT WINDOW SWITCH
OUTSIDE MIRROR ADJUSTMENT ROCKER SWITCH
REAR SIDE WINDOWS CHILD SAFETY LOCK SWITCH
RED WIRE
RIGHT ELECTRICALLY ADJUSTABLE, HEATED EXTERIOR MIRROR
RIGHT FRONT DOOR CONTROL MODULE (IN RIGHT FRONT DOOR)
RIGHT FRONT POWER WINDOW SWITCH
RIGHT MIRROR EXTERIOR FOLD IN MIRROR MOTOR TURN SIGNAL LAMP
RIGHT MIRROR OUTSIDE HEATER MIRROR AMBIENT LAMP
RIGHT OUTSIDE MIRROR ADJUSTMENT SELECTION SWITCH
RIGHT REAR POWER WINDOW SWITCH
Go to component -> Power mirror circuit -> NCA WIRE
nca wiring diagram (27 of 41)
1 2 4 5 CAN-B H CAN-B L 30 31
17 18 CAN-B H CAN-B L
4 3 CAN-B H CAN-B L
BLU/BLK WIRE
BRN WIRE
BRN/RED WIRE
CLOSE VENT WINDOW SWITCH
COMFORT ACC PUSHBUTTON CONTROL MODULE (IF EQUIPPED) ACC PUSHBUTTON
COMPUTER DATA LINES SYSTEM
CONTROL MODULE
DRIVER POWER WINDOW, OUTSIDE MIRROR ADJUSTMENT SWITCH GROUP
EIS (EZS) CONTROL UNIT
FRONT PASSENGER POWER WINDOW SWITCH
FUSE 26
FUSE 34
HOT AT ALL TIMES
LEFT FRONT DOOR CONTROL MODULE (IN LEFT FRONT DOOR)
LEFT FRONT POWER WINDOW MOTOR (CENTER OF LEFT FRONT DOOR)
LEFT FRONT POWER WINDOW SWITCH
LEFT REAR POWER WINDOW SWITCH
LOAD COMPARTMENT FUSE, RELAY BOX (RIGHT SIDE OF CARGO AREA)
NCA WIRE
OPEN VENT WINDOW SWITCH
ORG/ WIRE
PNK WIRE
REAR SIDE WINDOWS CHILD SAFETY LOCK SWITCH
RED WIRE
RIGHT FRONT DOOR CONTROL MODULE (IN RIGHT FRONT DOOR)
RIGHT FRONT POWER WINDOW MOTOR (CENTER OF RIGHT FRONT DOOR)
RIGHT FRONT POWER WINDOW SWITCH
RIGHT REAR POWER WINDOW SWITCH
WHT WIRE
Go to component -> Power windows circuit (1 of 2) -> NCA WIRE
nca wiring diagram (28 of 41)
AUX L +
AUX R +
BACKUP CAMERA
BACKUP CAMERA VOLTAGE SUPPLY MODULE
BLK WIRE
BRN WIRE
CIRCUIT 31 LEFT REAR SEAT VOLTAGE DISTRIBUTOR CONNECTOR 2
COMAND OPERATING, DISPLAY, CONTROL MODULE
DVD PLAYER (W/ REAR ENTERTAINMENT)
NCA WIRE
RED/BLK WIRE
SHIELD
VIDEO OUT VIDEO GND
W/ REAR ENTERTAINMENT
W/O REAR ENTERTAINMENT
WHT/BLK WIRE
YEL WIRE
Go to component -> Rear camera circuit -> NCA WIRE
nca wiring diagram (29 of 41)
1 2 3 4 5 6 31 30 HL HR CAN B L CAN B H
1 2 3 4 5 6 7 8 9 10 31 31 SIG SIG 30
3 1 SIR SIL
31 31 PNK WIRE
36 35 CAN-B H CAN-B L
BACKREST HEATED CUSHION
BLU WIRE
BLU/BLK WIRE
BRN WIRE
BRN/RED WIRE
CAN B H
CAN B L
CIRCUIT 31 LEFT FOOTWELL VOLTAGE DISTRIBUTOR CONNECTOR 1
CIRCUIT 31 LEFT REAR SEAT VOLTAGE DISTRIBUTOR CONNECTOR 3
CIRCUIT 31 RIGHT FOOTWELL VOLTAGE DISTRIBUTOR CONNECTOR
COMPUTER DATA LINES SYSTEM
FRONT SAM CONTROL UNIT (UNDER FRONT PASSENGER'S SEAT)
FUSE 31 FUSE, RELAY BOX (RIGHT REAR OF CARGO AREA)
FUSE 68
GRN WIRE
GRN/WHT WIRE
GRY WIRE
GRY/BLK WIRE
HOT AT ALL TIMES
LEFT FRONT HS SWITCH
LEFT FRONT SEAT BACKREST VENTILATION MOTOR GROUP (IN LEFT FRONT SEAT BACK)
LEFT FRONT SEAT CUSHION VENTILATION MOTOR GROUP (IN LEFT FRONT SEAT CUSHION)
LEFT FRONT SEAT HEATED CUSHION
LEFT FRONT SEAT VENTILATION BLOWER REGULATOR
LEFT FRONT SEAT VENTILATION SWITCH RIGHT FRONT HS SWITCH
LEFT REAR FOOTWELL
LHZ-
NCA WIRE
PNK WIRE
RED WIRE
RIGHT FRONT BACKREST HEATED CUSHION
RIGHT FRONT SEAT BACKREST VENTILATION MOTOR GROUP (IN RIGHT FRONT SEAT BACK)
RIGHT FRONT SEAT CUSHION VENTILATION MOTOR GROUP (IN RIGHT FRONT SEAT CUSHION)
RIGHT FRONT SEAT HEATED CUSHION
RIGHT FRONT SEAT VENTILATION BLOWER REGULATOR (IN RIGHT FRONT SEAT BACK)
RIGHT FRONT SEAT VENTILATION SWITCH
SEAT HEATED CUSHION
STEERING COLUMN MODULE (IF EQUIPPED) (TOP OF STEERING COLUMN)
UPPER CONTROL PANEL CONTROL MODULE
VIO WIRE
VIO/BLK WIRE
Go to component -> Ventilation & heated seat circuit -> NCA WIRE
nca wiring diagram (30 of 41)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 MIC OUT
1 2 MOST IN MOST OUT
BRN WIRE
CIRCUIT 31 LEFT REAR SEAT VOLTAGE DISTRIBUTOR CONNECTOR 2
EMERGENCY CALL SYSTEM CONTROL UNIT (IN LEFT REAR FOOTWELL)
GRN WIRE
HANDS-FREE SYSTEM MICROPHONE GROUP
MIC GND
MIC OUT +
NCA WIRE
ORG/ WIRE
PNK MIC 1 MIC 3 WIRE
PNK WIRE
RED/BLK WIRE
SOUND SYSTEMS
VOICE CONTROL SYSTEM (VCS (SBS)) CONTROL UNIT
WAKE UP 31
Go to component -> Voice activation circuit -> NCA WIRE
