The 2023 Mercedes-Benz Metris (US Postal) 2.0L 4-cyl achieves a combined EPA fuel economy rating of 21 MPG. This won’t win any hypermiling contests, but nobody who buys this Metris variant is particularly concerned about saving fuel. These purpose-built vans exist for reliable, high-volume mail delivery day in and day out. Fuel economy is just a line item on a larger operational budget, and it’s already been factored in.

City and highway performance

The EPA breaks down the Metris’s fuel economy further, showing 19 MPG in city driving and 25 MPG on the highway. The lower city figure reflects the nature of mail routes, with constant stops, starts, and idling. The highway MPG demonstrates the engine’s efficiency when cruising at steady speeds. These figures are based on standardized testing. A fully loaded Metris battling headwinds on rural routes probably won’t replicate those highway numbers.

Annual fuel cost

According to the EPA, the estimated annual fuel cost for the 2023 Mercedes-Benz Metris (US Postal) is $2,750. This figure assumes 15,000 miles of driving per year and uses the national average fuel price at the time of calculation (likely based on regular gasoline prices in the $4-$4.50/gallon range for 2023 models). Fluctuating fuel prices, driving habits, and vehicle load can impact this number. However, it provides a standardized baseline for comparison. The USPS surely runs its own internal operational cost models, looking at bulk fuel discounts and route optimization, to determine the actual operational costs for all Mercedes Benz fuel economy data in its fleet.

Real-world expectations

The EPA figures are a good starting point, but real-world fuel economy will vary. Drivers who use smooth acceleration and anticipate traffic flow can probably get closer to the EPA estimates. However, aggressive driving, carrying heavy loads, and frequent idling will all reduce fuel efficiency. Expect the postal service to monitor fuel usage across its fleet and possibly implement driver training and route optimizations to maximize efficiency and minimize expenses.

How it compares

Compared to other vans in the cargo segment, the Metris’s fuel economy is average. The Ford Transit Connect achieves around 24 MPG combined with its 2.0L engine, making it a slightly more efficient option. The larger Ford Transit, equipped with its base 3.5L V6, sees significantly lower fuel economy, around 17 MPG combined. The Ram ProMaster City, with its 2.4L engine, also gets around 24 MPG combined. The Metris balances size, capability, and fuel consumption. For the USPS, the Metris’s maneuverability and size may outweigh a slight dip in fuel economy compared to smaller vehicles in delivery zones. You can explore METRIS MPG across all years for data from previous model years.

Tips to maximize efficiency

While most USPS drivers likely adhere to strict operational guidelines, some strategies can improve fuel economy. Gentle acceleration and braking are key. Avoid sudden bursts of speed and anticipate stops to minimize hard braking, because it wastes fuel. Gradual changes in speed help the nine-speed automatic transmission operate smoothly in its most efficient gear.

Proper tire inflation is important, and this is even more important on a delivery vehicle subjected to constant curb strikes and potholes. Underinflated tires increase rolling resistance, forcing the engine to work harder and burn more fuel. Regularly check and maintain the recommended tire pressure.

Minimize idling whenever possible. Extended idling consumes fuel without covering any distance. If stopping for more than a minute or two, shut off the engine. The Metris’s engine is designed for frequent starts and stops, so restarting it consumes less fuel than prolonged idling.

Avoid carrying unnecessary weight. Remove any extra equipment or items from the cargo area that aren’t essential for the route. Every pound adds to the vehicle’s overall weight, reducing fuel efficiency.