2019 Mercedes-Benz Sprinter Fuse Box Diagram & Amp Ratings
A complete technician's guide to the fuse panels, relay locations, and circuit assignments on the 2019 Mercedes-Benz Sprinter.
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As an ASE-certified master technician, I know how frustrating electrical issues can be, especially on a workhorse like the 2019 Mercedes-Benz Sprinter. Whether you are running a fleet of delivery vans or building out a custom camper, knowing where your fuses and relays are located is crucial for minimizing downtime. The 2019 model year marks the beginning of the VS30 generation, featuring an updated electrical architecture to support advanced driver aids and modern infotainment.
Below is a comprehensive guide to the fuse box locations, diagrams, and amperage ratings for your 2019 Sprinter. Keep in mind that exact fuse assignments can vary significantly based on your van's trim, wheelbase, and factory upfitter options. Always verify the circuit using the printed legend inside the fuse box lid or the factory fuse allocation chart located in the vehicle's toolkit.
Quick answer
The 2019 Mercedes-Benz Sprinter has three primary fuse box locations:
- Driver's Footwell Fuse Box: Located inside the cabin, behind the kick panel on the left side of the driver's footwell.
- Driver's Seat Base Fuse Box: Located underneath the driver's seat, accessible by removing the side cover of the seat base.
- Engine Compartment Fuse Box: Located under the hood on the driver's side, near the firewall and jump-start terminals.
Driver's Footwell Fuse Box
This fuse panel is located behind the trim panel in the driver's footwell. It primarily handles interior cabin electronics, lighting, and dashboard accessories.
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| 1 | 15A | Blue | 12V Power socket / Cigar lighter (Front) |
| 2 | 20A | Yellow | Radio / MBUX Infotainment display |
| 3 | 10A | Red | SRS Airbag control module |
| 4 | 7.5A | Brown | Instrument cluster / Dashboard lighting |
| 5 | 15A | Blue | Windshield wiper motor |
| 6 | 10A | Red | Headlights (Low beam - Left/Right control) |
| 7 | 10A | Red | Turn signals / Hazard flasher module |
| 8 | 30A | Green | Blower motor (Front cabin climate control) |
| 9 | 15A | Blue | Interior dome lights / Cargo area lighting |
| 10 | 10A | Red | Horn relay / Steering wheel controls |
| 11 | 25A | Clear | Power windows (Driver/Passenger) |
| 12 | 10A | Red | OBD2 Diagnostic port |
Note: The flasher relay and interior lighting relays are also integrated into the control modules near this panel.
Driver's Seat Base Fuse Box
This is the main distribution block for body control functions, upfitter connections, and heavy-duty auxiliary circuits. If you have a passenger or camper upfit, you will spend a lot of time here.
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| 20 | 30A | Green | Power seat adjustment (Driver) |
| 21 | 15A | Blue | Fuel pump module |
| 22 | 20A | Yellow | Trailer brake controller (If equipped) |
| 23 | 25A | Clear | Auxiliary rear blower / A/C clutch relay control |
| 24 | 15A | Blue | Rear 12V outlets / Cargo accessory power |
| 25 | 10A | Red | Central locking system |
| 26 | 30A | Green | Heated seats / Rear window defroster |
| 27 | 20A | Yellow | Upfitter auxiliary terminal (Terminal 15/Ignition) |
| R1 | Relay | Black | Fuel Pump Relay |
| R2 | Relay | Black | Terminal 15 (Ignition Power) Relay |
Engine Compartment Fuse Box
Located under the hood on the left side (driver's side in LHD vehicles), this fuse box protects the critical powertrain components, engine management, and high-draw systems.
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| 30 | 25A | Clear | ABS / ESP Control Module |
| 31 | 40A | Orange | ABS / ESP Hydraulic Pump |
| 32 | 15A | Blue | Engine Control Module (ECM/PCM) |
| 33 | 20A | Yellow | Ignition coils / Glow plug module (Diesel) |
| 34 | 30A | Green | Starter relay / Starter solenoid circuit |
| 35 | 15A | Blue | Transmission Control Module (TCM) |
| 36 | 20A | Yellow | Headlights (High beam / DRL control) |
| 37 | 15A | Blue | Radiator fan control / A/C compressor clutch |
| 38 | 10A | Red | Brake light switch / Tail lights / Park lights |
| R3 | Relay | Black | Starter Relay |
| R4 | Relay | Black | Engine Control (Main Relay) |
How to test a fuse
Electrical gremlins can usually be traced back to a blown fuse. Here is the professional way to test them:
- Visual Inspection: Pull the suspect fuse using a fuse puller or needle-nose pliers. Hold it up to a light source and check the U-shaped or S-shaped wire inside. If the wire is broken or the plastic is scorched, the fuse is blown.
- Use a Test Light: This is the fastest method. Attach the alligator clip of a 12V test light to a solid, bare-metal ground. Turn the ignition to the "ON" position (engine off). Probe the two small metal testing tabs on the top of the fuse. If the test light illuminates on both sides, the fuse is good. If it only lights up on one side, the fuse is blown.
- Use a Digital Multimeter (DMM): Set your multimeter to the continuity setting (the one that beeps) or the lowest Ohms (Ω) setting. Touch a probe to each test tab on top of the fuse. If you hear a beep or see a reading close to 0.0 ohms, the fuse is intact. If you get an "OL" (Open Loop) reading, the fuse is dead.
Never replace a blown fuse with one of a higher amperage rating. Doing so bypasses the safety limit of the circuit and can lead to melted wires or a vehicle fire.
Common blown fuses on this vehicle
Sprinters are generally reliable, but they do have a few common electrical pain points. If you are experiencing issues, check these circuits first:
- 12V Power Sockets (Fuse #1 - Footwell): Delivery drivers and contractors constantly plug in phones, laptops, and GPS units. A damaged charger will instantly pop this 15A fuse.
- Blower Motor (Fuse #8 - Footwell): The Sprinter's cabin is massive, meaning the blower motor runs at high speeds constantly. Over time, the motor pulls higher amperage as its bearings wear out, popping the 30A fuse. Check the cabin air filter; a clogged filter stresses the motor.
- Trailer Brake / Lights (Fuse #22 - Seat Base): If you frequently tow different trailers, a short in the trailer's wiring harness will blow the trailer brake or tail light fuses in the Sprinter. Always inspect the trailer plug for corrosion.
- Upfitter Accessory Power (Fuse #27 - Seat Base): Camper conversions often tie into the Sprinter's factory upfitter blocks. If an aftermarket accessory draws too much current, it will blow the designated upfitter fuse under the seat.
Electrical diagnostics can get complicated quickly, especially on modern CAN-bus networks. If you keep blowing the same fuse, you have a short circuit that needs professional attention.
Find a trusted shop on Repairius.
Before you pull a fuse on the 2019 Mercedes-Benz Sprinter
- Use the label printed on the panel cover or the owner's manual for your exact build. Layouts change with options, model year and build date, so a chart for another truck can be wrong.
- Replace a blown fuse only with the same amp rating. A larger fuse can let wiring overheat.
- A fuse that blows again right away means a short or failing component downstream. Find the cause before replacing it again.
- A good fuse doesn't prove the circuit works — relays, grounds and connectors fail too.
- Disconnect the battery before working near high-current fuses or cables.
Learn more: How fuses, relays and truck electrical systems work
More specs for the 2019 Mercedes-Benz Sprinter
Oil Capacity & Filter
Capacity, weight, filter PN, drain plug torque, change interval.
Fluid Type Specs
Engine oil, coolant, ATF, diff, brake, PS, DEF — with OEM spec numbers.
Coolant Capacity & Type
Total system capacity, OEM coolant spec, flush interval, bleed tips.
Transmission Fluid & Service
Trans model, fluid spec, capacity, filter PN, service interval.
Torque Specifications
Lug nuts, drain plug, caliper, axle nut, plug, key fasteners.
Brake Pad & Rotor Specs
Pad PNs, rotor size, min thickness, caliper torque.
Tire Size & Pressure
OEM size, cold psi, bolt pattern, wheel size, TPMS.
Battery Size & Group
Group size, CCA, AGM/flooded, dimensions, reset note.
A/C Refrigerant & Oil
R-134a or R-1234yf, charge oz, PAG oil spec.
Bulb Sizes (Headlight, Tail, Fog)
Headlight, fog, tail, turn, reverse, interior.
Factory Maintenance Schedule
Service intervals by mileage, severe-duty notes, known issues.
Towing Capacity & Payload
Max tow, payload, GVWR/GCWR, hitch class by trim.
Serpentine Belt Routing & Length
Belt routing, length, rib count, OEM + aftermarket PNs.
Wheel Alignment Specifications
Camber, caster, toe ranges (front & rear), adjustability notes.
Paint Color Codes
All factory colors with paint codes, sticker location, touch-up tips.
Wiper Blade Sizes
Driver/passenger/rear blade size, attachment, OEM + cross-refs.
Spark Plug Type & Gap
Plug PN, gap, torque, interval by engine.
Transmission & Axle Gear Ratios
Trans gear ratios, axle ratios, RPO codes, tow vs MPG impact.
Key Fob Programming
DIY programming steps, FCC ID, fob PN, battery, transponder.
Same spec — other model years
Maintenance & repair guides
2019 Mercedes-Benz Sprinter Maintenance Schedule →
Available maintenance guidance; confirm the manufacturer schedule.
Repair planning references →
Plan the scope of work; detailed procedures need configuration-matched evidence.
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