2019 Mercedes-Benz Metris Fuse Box Diagram & Amperage

As an ASE-certified master technician, I’ve worked on plenty of commercial and passenger vans. The 2019 Mercedes-Benz Metris (part of the W447 chassis family) is a robust midsize van, but diagnosing electrical issues can quickly become frustrating if you don't know where to look. Modern Mercedes-Benz vehicles use multiple power distribution centers, and the Metris is no exception.

Below is a comprehensive guide to the fuse box locations, amperage ratings, and circuit diagrams for the 2019 Mercedes-Benz Metris.

Disclaimer: Mercedes-Benz fuse assignments vary heavily based on the exact trim (Cargo vs. Passenger), options, and upfitter modifications. Always verify the printed legend located in the fuse box lid or your owner’s manual before replacing a fuse.

Quick answer: 2019 Mercedes-Benz Metris Fuse Box Locations

If you are hunting down a blown fuse, you will primarily need to check two main locations on this vehicle:

1. Passenger Compartment Footwell Fuse Box: Located in the front passenger (co-driver) footwell, near the kick panel / lower A-pillar. You will need to pull back the floor covering and remove the access panel to reach it.
2. Right Front Seat Base Fuse Box: Located under the front passenger (co-driver) seat. You must move the seat all the way forward and remove the plastic cover on the side/rear of the seat base to access the fuses and relays.
3. Pre-Fuse Box (Battery Compartment): Located near the battery. This contains high-amp mega fuses (alternator, main power distribution) which rarely blow unless there is a catastrophic short or a reversed jump-start.

Passenger Compartment Footwell Fuse Box

This fuse block primarily controls interior body electronics, lighting, the infotainment system, and 12-volt accessory sockets.

Right Front Seat Base Fuse Box

The power distribution center under the passenger seat is the workhorse of the Metris. It houses the fuses for powertrain management, heavy climate control loads, and safety systems. Relays for the fuel pump, starter, blower motor, and horn are also typically located in this module.

Note on Relays: The standard relay blocks under the seat are marked alphabetically or numerically depending on the build sheet. Check for Relay A (Engine Circuit), Relay B (Starter), and Relay C (Fuel Pump) if you are diagnosing a crank/no-start condition.

How to test a fuse

Testing a fuse correctly can save you from chasing phantom electrical issues. Here is the proper way a technician does it:

1. Use a Digital Multimeter or Test Light: Turn the vehicle’s ignition to the "ON" position (do not start the engine) so that circuits are energized.
2. Ground your tool: Attach the clamp of your 12V test light or the black probe of your multimeter to a solid, bare metal ground on the chassis.
3. Probe the test points: Look closely at the top of the fuse. You will see two small exposed metal test tabs.
4. Read the results: Touch the probe to one tab, then the other.
   • If the test light illuminates (or the multimeter reads ~12V) on both sides, the fuse is good.
   • If it lights up on one side only, the fuse has blown and must be replaced.
   • If it lights up on neither side, the circuit is not currently receiving power (e.g., a headlight fuse when the headlights are turned off, or a blown master fuse upstream).

Always replace a blown fuse with one of the exact same amperage and color. Using a higher-amp fuse can melt wiring harnesses or cause an electrical fire.

Common blown fuses on this vehicle

In my experience servicing the Metris fleet, certain circuits are highly prone to popping. If you have an electrical failure, check these first:

• 12V Accessory Sockets / Cigar Lighter (Fuse 36 or 37 in the footwell): This is the number one failure. Delivery drivers and contractors often plug in faulty phone chargers, heavy-duty inverters, or portable air compressors that exceed the 15-amp limit. If your phone won't charge, check this fuse.
• Blower Motor (Fuse 60 under the seat): The Metris uses a 40-amp fuse for the heavy-duty climate blower. As the blower motor ages, or if the cabin air filter becomes severely clogged, the motor draws excess current to spin, eventually popping this fuse. Always check the cabin filter if this blows.
• Trailer Tow Fuses (Fuse 65 under the seat): If your Metris is equipped with a towing package, connecting to an older trailer with corroded wiring or a shorted light housing will immediately blow the trailer control fuses. Inspect the trailer wiring harness before replacing the fuse.
• Fuel Pump (Fuse 51 under the seat): A crank-but-no-start condition can sometimes be traced back to this 20-amp fuse. If it blows repeatedly, the fuel pump may be failing internally and drawing too much current.

Electrical gremlins in modern commercial vans can be intimidating, especially with complex CAN-bus networks. If replacing a blown fuse doesn’t solve your issue, or if the new fuse immediately pops again, you have a dead short that needs professional diagnosis. Find a trusted shop on Repairius.