2025 Mercedes-Benz Sprinter Fuse Box Diagram & Amperage
Detailed fuse and relay information for your 2025 Sprinter, including common issues and how-to guides.
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Quick answer
The 2025 Mercedes-Benz Sprinter has three main fuse box locations:
- Driver-Side Dash Fuse Box: Located behind a removable panel on the driver's side of the dashboard, accessible when the driver's door is open.
- Under-Hood Fuse Box: Found in the engine compartment, near the battery, this box contains high-amperage fuses and relays for major vehicle systems.
- Driver's Seat Pedestal Fuse Box: Situated at the base of the driver's seat, housing fuses for various body and chassis electronics.
Driver-Side Dash Fuse Box
This fuse panel primarily services interior and convenience-related circuits. To access it, open the driver's door and pry off the plastic cover on the side of the dashboard.
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| 1 | 5A | Tan | Instrument Cluster |
| 2 | 10A | Red | Radio, Infotainment System |
| 3 | 15A | Blue | 12V Power Outlet / Cigar Lighter |
| 4 | 20A | Yellow | Blower Motor Fan |
| 5 | 5A | Tan | Airbag (SRS) Control Module |
| 6 | 10A | Red | Dome/Reading Lights |
| 7 | 15A | Blue | Windshield Wipers |
| 8 | 10A | Red | Heated Mirrors |
| 9 | 5A | Tan | Rain Sensor |
| 10 | 25A | Clear | Power Windows |
Under-Hood Fuse Box
Located in the engine bay, this fuse box is home to fuses and relays that control critical engine and safety systems. Always disconnect the battery before servicing high-amperage fuses in this location.
| Fuse # / Relay | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| F1 | 30A | Green | Engine Control Module (ECM/PCM) |
| F2 | 25A | Clear | Fuel Pump |
| F3 | 15A | Blue | Ignition Coils |
| F4 | 20A | Yellow | Starter Motor Relay |
| F5 | 15A | Blue | Low Beam Headlights |
| F6 | 15A | Blue | High Beam Headlights |
| F7 | 10A | Red | Tail Lights / Parking Lights |
| F8 | 30A | Green | ABS Control Module |
| F9 | 20A | Yellow | A/C Compressor Clutch |
| F10 | 40A | Orange | Radiator Fan |
| R1 | - | Black | Starter Relay |
| R2 | - | Black | Fuel Pump Relay |
| R3 | - | Black | ECM/PCM Main Relay |
Driver's Seat Pedestal Fuse Box
This unique location at the base of the driver's seat contains a mix of fuses for various onboard electronics. You may need to slide the driver's seat fully forward or back to access the cover.
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| S1 | 30A | Green | Trailer Brake Control Module |
| S2 | 25A | Clear | Power Seat Motors |
| S3 | 15A | Blue | Auxiliary Heater |
| S4 | 20A | Yellow | Rear 12V Power Outlet |
| S5 | 10A | Red | Telematics / Emergency Call System |
| S6 | 15A | Blue | Central Locking System |
| S7 | 5A | Tan | Electronic Stability Program (ESP) |
| S8 | 10A | Red | Rear View Camera |
Note: The fuse numbers, amperage, and circuits listed above are for the most common configuration of the 2025 Mercedes-Benz Sprinter. Trim levels and optional equipment may cause variations. Always verify the fuse locations and ratings by checking the printed legend on the inside of your vehicle's fuse box cover.
How to test a fuse
If a component in your Sprinter has stopped working, a blown fuse is a likely culprit. You can test a fuse in two simple ways:
- Visual Inspection: Pull the suspect fuse from its slot using a fuse puller (often found in the fuse box itself). Hold the fuse up to the light. Inside the plastic body, you will see a small metal strip. If this strip is broken or melted, the fuse is blown and needs to be replaced with a new one of the exact same amperage rating.
- Using a Multimeter: For a more definitive test, set your multimeter to the continuity setting (it often looks like a sound wave symbol). Touch one probe to each of the two metal prongs on top of the fuse. If the multimeter beeps or reads close to zero ohms, the fuse is good. If it remains silent or reads "OL" (open loop), the fuse is blown.
Common blown fuses on this vehicle
- 12V Power Outlet / Cigar Lighter (Dash Fuse Box): This fuse frequently blows when a faulty phone charger or other accessory is plugged in. Before replacing the fuse, unplug all devices from the power outlets. If the new fuse blows immediately, inspect the outlet itself for any foreign objects that could be causing a short.
- Trailer Lights/Brakes (Driver's Seat Pedestal): Issues with trailer wiring are a common cause for blown trailer-related fuses. If you find a blown trailer fuse, the first thing to check is the trailer wiring harness and the plug. Look for any corroded, frayed, or pinched wires. Water intrusion into the trailer plug can also cause a short circuit.
- Fuel Pump (Under-Hood Fuse Box): While less common, a blown fuel pump fuse can leave you stranded. If you replace the fuse and it blows again, this could indicate a failing fuel pump that is drawing too much current. This is a job best left to a professional, as it involves working with the fuel system.
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Before you pull a fuse on the 2025 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 2025 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
2025 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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