Mercedes-Benz. Cargo, passenger and cab chassis. Key start.
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Which wires give constant, ignition and ground on a 2015 Mercedes-Benz Sprinter (NCV3)?
On a 2015 Mercedes-Benz Sprinter (NCV3), take constant power from the Red/Gray (rt/gr) wire at the EK1 body builder connector X145/1 in the driver seat base, terminal 2, ignition from the Black/Yellow (sw/ge) wire at the EK1 connector X145/1, terminal 3, and ground to clean, bare body metal. Meter every wire first.
Written by API Signal, fleet GPS and camera installers for 35+ years across Georgia, South Carolina and North Carolina, installing every major telematics and camera brand. Every wire on this page lists its source.
Test every wire with a meter before you tap it
No wiring information is ever guaranteed. Colors and locations change with trim, options and build date, and the manufacturer can change them in the middle of a model year. We share this as a starting point for installers, and you are responsible for confirming every connection on the truck in front of you.
This page covers the 2015 Sprinter (NCV3, W906), sold as Mercedes-Benz: cargo van, passenger van and cab chassis.
We did not find a 2015-specific sheet. The colors come from the 2007 to 2014 installer sheets and Mercedes' EK1 sheet, which cover the whole NCV3. Our own team has not yet metered these on a 2015 van, and each row says so.
OBD-II portUnder the column, left side
Best power spotEK1, driver seat base
System voltage12V
Ignition typeKey (electronic ignition switch)
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Where do I get constant, ignition and ground on a 2015 Mercedes-Benz Sprinter (NCV3)?
Take constant, ignition and ground from the same area. Mercedes builds a body builder connector (EK1) into the driver seat base with battery, ignition and engine-running feeds, which is the cleanest spot on vans that have it.
Option 1 Mercedes upfitter
EK1 connector, driver seat base
Mercedes' body builder connector X145/1 and fuse box F55/4 in the driver seat base. Check your van has it.
Constant
Red/Gray (rt/gr)
EK1 body builder connector X145/1 in the driver seat base, terminal 2Battery (terminal 30), 25A on fuse 10. Mercedes-Benz's EK1 body builder connector sheet.
Mercedes says loads over 25A need the auxiliary battery option (E28).
Option 2 Ignition switch
Ignition switch and radio plug
Electronic ignition switch on the steering column, and the radio harness.
Constant
Red/Gray (rt/gr)
Ignition switch harnessAlways hot, 25A and 10A wires. Installer sheets from 2007, 2008, 2011 and 2014 agree.
Ignition
Black
Ignition switch, black 5-pin plug, pin 2Hot in run and start. From the 2011 and 2014 sheets; 2007 and 2008 give Black with no pin.
Ground
Brown
Radio 16-pin plug, pin A8Radio ground. 2008, 2010 and 2014 sheets agree.
Accessory
CAN data only
Not a wire on this vanAccessory is sent over the CAN bus, not a plain wire.
A 2014 sheet lists a Black/Yellow radio ignition wire on pin A7, but a later reply says that harness has no switched power. Meter it.
EK1 colors from Mercedes-Benz's EK1 body builder connector sheet (MY2007 to 2013, and Mercedes bulletin UM906.10 for the 906 Sprinter). Ignition switch and radio colors from installer sheets on the12volt.
What are the turn signal, reverse and light wires on a 2015 Mercedes-Benz Sprinter (NCV3)?
Circuit
Wire color
Location and what it does
Left turnPositive +Not yet checked
Black/White (sw/ws)
SAM fuse and relay box, driver kick panel, brown 52-pin (C9), pin 13Flashes with the left signal, front and rear. 2007, 2011 and 2014 sheets agree on the color.
Right turnPositive +Not yet checked
Black/Dark Green (sw/gn)
SAM brown 52-pin (C9), pin 24Flashes with the right signal.
Park lightPositive +Not yet checked
Gray/Black (left)
Gray/Red (right)
SAM C9, pins 23 and 9 (2011 and 2014); a 2007 sheet gives a 20-pin plug, pins 1 and 12On with the park lights. The 2007 sheet also lists a Gray/White negative park wire on the brown 24-pin, pin 13.
HeadlightPositive +Not yet checked
Yellow/Black (left)
Yellow/Red (right)
SAM 12-pin (C7), pins 10 and 4Headlight outputs. From the 2011 and 2014 sheets.
ReversePositive +Not yet checked
White/Dark Blue (ws/bl)
SAM 20-pin (C3), pin 14Hot in reverse. From the 2014 sheet only.
Dome lightNegative -Not yet checked
Brown/Dark Green (br/gn)
SAM 18-pin (C6), pin 1Dome output. 2008, 2011 and 2014 sheets agree.
Each chip shows the main insulation color with its stripe. Source: NCV3 installer sheets on the12volt, carried to 2015.
Where are the brake, door, speed and CAN wires on a 2015 Mercedes-Benz Sprinter (NCV3)?
Circuit
Wire color
Location and what it does
BrakePositive +Not yet checked
Pink/Green (rs/gn)
Brake switch above the pedal, or the rear fuse/relay box 14-pin, pin 3Hot with the pedal pressed, ignition on. A 2014 sheet and a 2016 etrailer answer agree.
Front doorsNegative -Not yet checked
Dark Blue/Dark Green (bl/gn)
Driver door module 20-pin, pin 8 (driver); SAM C9, pin 43 (passenger)Door triggers. Same color both sides.
Rear and side doorsNegative -Not yet checked
Yellow/White (ge/ws)
Pink/White (rs/ws)
Yellow/Dark Green (left slider)
Gray/Dark Green (right slider)
SAM C9, pins 4 and 41; power sliding doors at the B-pillar switch 3-pin, pin 2The sheets call C9 pins 4 and 41 the left and right rear doors; confirm whether they are the cargo doors. The slider wires are for power sliding doors.
Parking brakeNegative -Not yet checked
Brown/White (br/ws)
SAM C9, pin 32Grounds with the parking brake set. From the 2014 sheet only.
Lock / unlockNegative -Not yet checked
Dark Blue/Red (lock)
Dark Blue/Black (unlock)
Driver door module 20-pin, pins 12 and 11; passenger side SAM C9, pins 49 and 48Lock and unlock. 2007, 2011 and 2014 sheets agree.
HazardNot foundNot yet checked
Not found
CAN data onlyThe hazard switch talks over the CAN bus; there is no plain wire to tap.
Vehicle speedAC signalNot yet checked
White
Instrument cluster, white 18-pin, pin 8Speed signal. From the 2014 sheet only.
TachAC signalNot yet checked
Yellow/Gray (ge/gr)
Engine computer (ECM) 96-pin on the driver fender, pin 33 or 35The 2011 sheet says pin 33 and the 2014 sheet pin 35. Meter it.
CAN busDataNot yet checked
Brown/Red (high)
Brown (low)
SAM C9, pins 51 and 52The 2014 sheet warns these are reported flipped on some vans. Never cut or splice them; Mercedes says to use the PSM for signals.
Sources: Mercedes-Benz's EK1 body builder connector sheet and Mercedes bulletin UM906.10 (OEM), Mercedes' 2015 fuse supplement (OEM), and installer sheets on the12volt for 2007, 2008, 2010, 2011 and 2014 vans. PSM module pin colors, EK2 and terminal 15R were not found.
Which years share wiring with the 2015 Mercedes-Benz Sprinter (NCV3)?
This page2015No year-specific sheet. Carried from the NCV3 sheets.
Same wiring2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2016, 2017 and 2018One generation (NCV3, W906). Installer sheets from 2007 to 2014 agree on the colors, and Mercedes' EK1 sheet covers the 906.
Not this page2019 and newerThe 2019 Sprinter (VS30) is a new generation with its own pages.
Where are the fuse boxes and ground points on a 2015 Mercedes-Benz Sprinter (NCV3)?
Driver seat baseBody builder fusesFuse 10 (25A) battery, fuse 11 (15A) ignition, fuse 12 (10A) engine running, fuses 17 and 18 (25A) for the PSM module. From Mercedes' 2015 fuse supplement.
Driver kick panelSAM fuse and relay boxMost body signals are on its plugs. A 150A Red feed is on the rear fuse/relay box, black 3-pin, pin 1.
Ground pointsClean body metalUse clean, bare body metal, never the battery negative post.
Fuses from Mercedes' 2015 fuse supplement. Our team has not yet checked them on a van.
Where is the OBD-II port on a 2015 Mercedes-Benz Sprinter (NCV3)?
OBD II
Diagnostic portOBD-II port: under the column, left sidePlug-in GPS trackers and OBD harnesses connect here. Check the port before you plan the install.
Common questions about 2015 Mercedes-Benz Sprinter (NCV3) wiring
What wire is constant power on a 2015 Mercedes-Benz Sprinter (NCV3)?
Red/Gray (rt/gr) at the EK1 body builder connector X145/1 in the driver seat base, terminal 2. Battery (terminal 30), 25A on fuse 10. Meter it before you tap it.
What wire is ignition on a 2015 Mercedes-Benz Sprinter (NCV3)?
Black/Yellow (sw/ge) at the EK1 connector X145/1, terminal 3. Ignition (terminal 15), 15A on fuse 11. Meter it before you tap it.
Where is the reverse wire on a 2015 Mercedes-Benz Sprinter (NCV3)?
White/Dark Blue (ws/bl) (positive +) at the SAM 20-pin (C3), pin 14. Hot in reverse. Meter it before you tap it.
Where is the brake wire on a 2015 Mercedes-Benz Sprinter (NCV3)?
Pink/Green (rs/gn) (positive +) at the brake switch above the pedal, or the rear fuse/relay box 14-pin, pin 3. Hot with the pedal pressed, ignition on. Meter it before you tap it.
Where is the parking brake wire on a 2015 Mercedes-Benz Sprinter (NCV3)?
Brown/White (br/ws) (negative -) at the SAM C9, pin 32. Grounds with the parking brake set. Meter it before you tap it.
Where is the vehicle speed signal on a 2015 Mercedes-Benz Sprinter (NCV3)?
White at the instrument cluster, white 18-pin, pin 8. Speed signal. Meter it before you tap it.
Which years share wiring with the 2015 Mercedes-Benz Sprinter (NCV3)?
2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2016, 2017 and 2018. One generation (NCV3, W906).
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