23 MPG combined, that’s the number to remember when considering the 2021 Mercedes-Benz AMG GLB35 4matic. It’s not going to win any hypermiling contests, but it’s respectable considering the GLB35 is a performance-oriented compact SUV with genuine AMG DNA. This vehicle blends practicality with a healthy dose of adrenaline, a mix that involves compromise at the pump.

City and highway performance

The EPA estimates the GLB35 at 21 MPG in the city and 26 MPG on the highway. The city figure reflects the stop-and-go nature of urban driving, where the GLB35’s 2.0-liter turbocharged engine works harder to overcome inertia. The highway number, on the other hand, showcases the engine’s efficiency at a constant cruising speed. These numbers highlight the reality of owning a performance vehicle: expect to pay more for fuel, especially if your daily commute involves heavy traffic. The eight-speed automatic transmission (AM8) does its best to optimize fuel consumption, but aggressive driving will always be penalized.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2021 Mercedes-Benz AMG GLB35 at $2,500. This is based on driving 15,000 miles per year and using the EPA’s projected national average fuel prices. Real-world costs will vary depending on individual driving habits, local fuel prices, and the type of fuel used. The GLB35 is a performance vehicle and thrives on premium fuel, so budgeting accordingly is crucial.

Real-world expectations

While the EPA provides a standardized estimate, real-world fuel economy varies. Aggressive acceleration, frequent hard braking, and extended idling will all negatively impact the GLB35’s MPG. Conversely, smooth driving, minimizing unnecessary weight, and maintaining proper tire inflation can help you get closer to the EPA estimates.

Consider how you typically drive and where you drive to get a more realistic idea of your potential fuel costs. People shopping for AMG performance are typically not buying for max fuel economy. They are buying a practical SUV with a performance edge, that will handle everyday tasks, trips to the beach and twisty backroads with joy.

How it compares

Looking at competitors, the BMW X2 M35i, another performance-oriented compact SUV, achieves a similar 25 MPG combined. The Audi SQ5, with its larger V6 engine, lands in the same ballpark. A standard Mercedes-Benz GLB250 with front-wheel drive, however, gets around 28 MPG combined, highlighting the fuel economy penalty you pay for the AMG’s extra performance. Comparing the GLB35 to the Macan base model makes you realize that while its a performance car, its not outrageous 19mpg like the Porsche.

These comparisons matter because they put the GLB35’s fuel economy into perspective. Buyers considering this SUV are often weighing the balance between practicality, performance, and running costs. Understanding how it stacks up against alternatives helps them make an informed decision.

Tips to maximize efficiency

Minimize aggressive acceleration. The GLB35’s turbocharged engine delivers plenty of power, but using it excessively will rapidly decrease fuel economy. Gentle acceleration and anticipating traffic flow will help you conserve fuel.

Use the Eco driving mode when appropriate. This setting adjusts engine and transmission parameters to prioritize fuel efficiency over performance. It’s ideal for highway cruising or low-speed city driving where maximum power isn’t necessary.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, which reduces fuel economy. Check your tire pressure regularly and inflate them to the recommended levels found on the driver’s side doorjamb.

Reduce unnecessary weight. Carrying around excessive cargo in the GLB35 adds weight, which requires the engine to work harder and consume more fuel. Remove any items you don’t need to improve efficiency.

Consider that the AMG trim designation always comes at a price. If you are looking to save on fuel economy, take a look at all Mercedes Benz fuel economy data, and compare the numbers against other trims of the GLB, and other vehicles. If you care about performance, but also about fuel, take a look at AMG MPG across all years. You can see which vehicles deliver peak MPG within the lineup.