The 2020 Mercedes-Benz GLB250 2.0L 4-cyl achieves 26 MPG combined, a reasonable compromise for buyers who need a compact SUV that can seat seven (in a pinch) and offers the cachet of the Mercedes-Benz brand. This isn’t class-leading fuel economy, but it’s respectable given the GLB250’s versatility and technology within its stylish shell. This vehicle is not primarily about saving fuel; it’s about fitting a family, their gear, and the occasional extra passenger in a relatively small footprint while enjoying a premium driving experience.

City and highway performance

The EPA estimates 23 MPG in the city and 30 MPG on the highway for the GLB250. The city figure reflects urban driving’s stop-and-go nature, where the engine idles or operates at low speeds, conditions where even efficient engines struggle to maintain optimal fuel consumption.

However, the relatively high highway MPG shows that the GLB250, with its smooth 8-speed automatic transmission, performs well on longer trips where it can settle into a fuel-saving cruise. These numbers indicate that drivers who primarily drive in the city might see fuel consumption slightly below the combined figure, while those who frequently travel on the highway could potentially exceed it.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2020 Mercedes-Benz GLB250 at $2,250. This figure is based on driving 15,000 miles per year and using national average fuel prices. Actual fuel costs will vary depending on individual driving habits, local fuel prices, and the type of fuel used. The $2,250 figure serves as a standardised benchmark for comparison against other vehicles; your personal fuel expenditure could be higher or lower based on your specific circumstances.

Real-world expectations

While the EPA provides a standardized test, your real-world mileage may vary. Aggressive driving, carrying heavy loads, and frequent short trips can negatively impact fuel efficiency. Gentle acceleration, consistent highway speeds, and proper tire inflation can help you achieve results closer to, or even slightly better than, the EPA estimates. Owners who prioritize fuel economy and adjust their driving habits can often see a tangible difference in their fuel expenses.

How it compares

In the crowded compact SUV segment, the GLB250’s fuel economy is in the middle. The BMW X1, a key competitor, achieves a combined MPG of 28, slightly better than the GLB250. The Audi Q3 is rated at 25 MPG combined, placing it just below the Mercedes.

The Lexus NX 300 offers similar fuel economy to the GLB250 at 25 MPG combined, but its hybrid variant, the NX 300h, significantly outperforms it with 31 MPG. Buyers considering the GLB250 often weigh the importance of its seating capacity and interior space against the slightly better fuel economy offered by some rivals. For a broader perspective, explore all Mercedes Benz fuel economy data. Owners interested in comparing the GLB250’s mileage across model years can review GLB250 MPG across all years.

Tips to maximize efficiency

The GLB250 responds well to gentle acceleration and smooth braking. Avoid abrupt starts and stops, as these actions consume significantly more fuel. Anticipate traffic flow and maintain a steady speed whenever possible to optimize fuel consumption.

Tire pressure is critical for fuel efficiency. Regularly check and maintain the recommended tire pressure (found on the doorjamb sticker). Under-inflated tires create more rolling resistance, forcing the engine to work harder and consume more fuel.

Reduce unnecessary weight in the vehicle. Carrying around extra cargo can decrease fuel economy, especially in city driving. Remove items from the trunk that are not essential for your daily commute.

Use the GLB250’s driving modes. The “Eco” mode typically adjusts the throttle response and transmission shift points to prioritize fuel efficiency. While it might slightly reduce performance, it can noticeably improve MPG in certain driving conditions.

Consider cruise control on the highway. Maintaining a consistent speed minimizes fluctuations in fuel consumption. Use cruise control on long stretches of highway to help optimize fuel efficiency.