Twenty-five MPG combined isn’t going to win any awards for efficiency, but it’s the price of admission for the 2016 Mercedes-Benz AMG GLA45 4matic. This isn’t a vehicle built for maximizing trips between fill-ups. This is a snarling, turbocharged autobahn missile shrunk down to hatchback proportions, designed to thrill well before it sips. The GLA45 buyer isn’t prioritizing fuel economy; they’re signing up for blistering acceleration and razor-sharp handling wrapped in a practical (and stylish) package.

City and highway performance

The EPA estimates of 22 MPG in the city and 28 MPG on the highway reflect the inherent tradeoffs in the GLA45’s design. The city figure suggests the fuel cost of stop-and-go driving due to frequent acceleration bursts to exploit gaps in traffic. The highway figure shows how a well-tuned engine and transmission can still deliver decent mileage when cruising at a steady speed.

Annual fuel cost

The EPA estimates an annual fuel cost of $2,300 for the 2016 Mercedes-Benz AMG GLA45. This figure is based on driving 15,000 miles per year, using a blend of city and highway driving, and assuming national average fuel prices. Of course, individual fuel costs will vary depending on driving habits, local fuel prices, and the grade of fuel used. The GLA45 demands premium fuel, which almost always costs more per gallon.

Real-world expectations

While the EPA estimates provide a useful baseline, real-world fuel economy in the AMG GLA45 is heavily dependent on driving style. Those who frequently indulge in the car’s power, and let’s be honest, most owners will, can expect to see figures lower than the EPA estimates, especially in city driving. Conversely, a more conservative driver, particularly on longer highway trips, might achieve numbers closer to or even slightly above the 28 MPG highway rating. The eagerness of the engine, and the quick-shifting nature of the transmission, are almost always too much fun to ignore.

How it compares

The AMG GLA45 occupies a unique niche. Compared to a more traditional hot hatchback like the Volkswagen Golf R (25 MPG combined), the GLA45 offers a higher driving position and a more luxurious interior, but at a similar fuel cost. A BMW X1 xDrive28i, another small luxury crossover, manages a slightly better 25 MPG combined, but sacrifices the raw power and AMG-tuned driving experience. Checking out the all Mercedes Benz fuel economy data reveals the GLA45’s trade-off between performance and economy, with other models offering either significantly better MPG or far greater power. The buyer choosing the GLA45 likely accepts this compromise, prioritizing AMG performance and styling over outright efficiency. The AMG MPG across all years emphasizes its focus on higher performance rather than higher fuel economy.

Tips to maximize efficiency

Use the car’s driving modes judiciously. Selecting “Comfort” mode will mellow throttle response and encourage earlier upshifts, promoting better fuel economy during routine commutes. “Sport” and “Sport+” modes are great for enjoying the car’s performance, but expect a significant drop in MPG.

Anticipate traffic flow and avoid abrupt acceleration and braking. Smooth, consistent driving is key to maximizing fuel efficiency in any vehicle, but it’s especially important in a performance-oriented car like the GLA45, where the temptation to use the turbocharger is always present.

Keep your tires properly inflated. Underinflated tires increase rolling resistance, which negatively impacts fuel economy. Check your tire pressures regularly and maintain the recommended levels specified on the doorjamb sticker.

Minimize aerodynamic drag. Remove any unnecessary items from the roof rack (if equipped), as these can significantly increase drag and reduce fuel economy, especially at highway speeds.

Service the engine on time. Make sure the engine gets regular oil and spark plug changes so that its operating efficiently. Poorly maintained engines often perform or burn with less efficiency.