A combined 25 MPG is a surprisingly modest figure for an automotive creation as audaciously fun as the 2019 Mercedes-Benz AMG GLA45 4matic. This isn’t a vehicle purchased by penny-pinchers; it’s acquired by enthusiasts who prioritize quick acceleration and sharp handling over squeezing every last mile from a gallon of premium fuel. The GLA45 is a snarling, turbocharged hot hatch masquerading as a subcompact SUV.

City and highway performance

The EPA estimates for the GLA45 break down to 22 MPG in the city and 28 MPG on the highway. While the highway number is respectable, the city figure underscores the reality that stop-and-go traffic and the temptation to use the car’s explosive power will take a toll. The AMG-tuned seven-speed dual-clutch transmission (AM7) delivers rapid-fire shifts, but its eagerness to downshift and keep the engine in its sweet spot ensures that fuel efficiency takes a back seat to performance, especially in urban environments.

Annual fuel cost

The estimated annual fuel cost for the 2019 Mercedes-Benz AMG GLA45 4matic is $2,300, according to the EPA. This figure is based on driving 15,000 miles per year and using the national average fuel price for premium gasoline, which is what the high-strung 2.0-liter engine demands. It’s a concrete number that reflects the cost of feeding the GLA45’s performance appetite. Owners considering the GLA45 should factor this premium fuel bill, and the need for premium gasoline, into their long-term ownership costs.

Real-world expectations

While the EPA provides a standardized benchmark, real-world fuel economy can vary significantly depending on driving style and conditions. Anyone frequently using the GLA45’s strong power output will likely see figures closer to the low end of the EPA range, or even dip below 20 MPG. A more relaxed and consistent highway journey should yield numbers closer to the 28 MPG estimate. Ultimately, the actual fuel economy achieved will be highly dependent on the driver’s restraint; a commodity that might be in short supply behind the wheel of this AMG.

How it compares

Compared to its competitors, the GLA45’s fuel economy is within the expected range for high-performance subcompact SUVs. The BMW X2 M35i, another direct competitor, offers similar performance with an EPA combined rating of 25 MPG. The Audi SQ3, if available in the US market (it wasn’t readily available in 2019), would likely target a similar MPG figure. These comparisons highlight a core truth: performance comes at a price. Buyers choosing these vehicles often prioritize the exhilarating driving experience over marginal fuel savings. Drivers who want to compare all Mercedes Benz fuel economy data can follow that link to see the broader picture across the lineup. Those particularly curious about AMG MPG across all years might find that fascinating as well.

Tips to maximize efficiency

Resist the urge to constantly bury your foot in the accelerator. The GLA45’s turbocharger spools up quickly and delivers instant gratification, but every hard launch and rapid acceleration burns extra fuel. Smooth, progressive acceleration will significantly improve your mileage. Drive carefully and only use the performance when you really need it.

Take advantage of the car’s driving modes. Selecting “Comfort” or “Eco” mode will dull the throttle response and encourage earlier upshifts, helping to avoid over-revving the engine and maximizing fuel efficiency. These modes are ideal for mundane commuting and highway cruising.

Keep an eye on tire pressure. Underinflated tires increase rolling resistance, which reduces fuel economy. Check your tire pressures regularly and inflate them to the recommended levels, which you can find on the sticker inside the driver’s side doorjamb.

Avoid unnecessary idling. Modern engines are designed to be more efficient when running; and keeping the engine running at a stand still burns fuel without covering any distance. If you’re going to be stopped for more than a minute or two, turn off the engine.