25 MPG combined isn’t going to win any hypermiling awards, but for the 2018 Mercedes-Benz AMG GLA45 4MATIC, it’s beside the point. This isn’t a car bought for its frugality; it’s a hot hatch masquerading as a subcompact SUV, purchased by enthusiasts who prioritize performance and driving thrills over efficiency. The GLA45 exists for the joy of its manic, turbocharged engine and tenacious grip.

City and highway performance

The GLA45 gets 22 MPG in the city and 28 MPG on the highway, according to EPA ratings. These figures reflect its performance-oriented design. The city MPG suffers due to frequent stop-and-go driving, which strains any engine, especially the AMG’s high-strung one. The highway figure is more respectable, benefiting from consistent speeds and less demand on the engine. However, even on the highway, a heavy foot will quickly negate any attempts at fuel conservation. The AMG-tuned automatic transmission (AM7) is eager to downshift for maximum acceleration, impacting overall efficiency.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2018 Mercedes-Benz AMG GLA45 4MATIC at $2,300. This is based on driving 15,000 miles per year, using a national average fuel price. Keep in mind that this is an estimate; your actual fuel costs will vary depending on your driving habits, local fuel prices, and the type of fuel you use. The GLA45 requires premium fuel, which adds to the overall cost of ownership. The EPA provides a benchmark, so consider your own circumstances when budgeting for fuel expenses.

Real-world expectations

Real-world fuel economy for the GLA45 can vary significantly. Drivers who frequently engage in spirited driving, use the car’s launch control feature, or spend a lot of time in stop-and-go traffic will likely see numbers closer to the low end of the EPA range, or even below. Those who adopt a more conservative driving style and spend more time on the highway might achieve figures closer to, or slightly above, the EPA estimates. Factors like tire pressure, vehicle maintenance, and weather conditions can also influence fuel economy.

How it compares

The 2018 AMG GLA45’s fuel economy is typical for its segment. The BMW X2 M35i, another performance-oriented subcompact SUV, achieves a similar 25 MPG combined. The Audi SQ3, which is not sold in the US, offers comparable performance and fuel consumption in the European market. A less fuel efficient option is the Porsche Macan S, which delivers around 20 MPG combined, but is more powerful. For buyers considering the GLA45, this fuel economy comparison is often secondary to performance and brand appeal. They’re willing to trade a few miles per gallon for the AMG’s signature sound and blistering acceleration. You can check all Mercedes Benz fuel economy data on our site.

Tips to maximize efficiency

Resist the urge to constantly exploit the engine’s power. Smooth acceleration and avoiding unnecessary hard braking can significantly improve fuel economy. The GLA45’s turbocharged engine responds well to gradual throttle inputs.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, which negatively affects fuel economy. Check your tire pressure regularly and inflate them to the recommended levels listed on the doorjamb.

Minimize idling. Excessive idling wastes fuel, especially in a high-performance engine like the GLA45’s. If you anticipate being stationary for more than a minute, turn off the engine to conserve fuel.

Use cruise control on the highway. Maintaining a consistent speed can help optimize fuel consumption. Avoid unnecessary acceleration and braking, and let the cruise control manage your speed on long stretches of highway.

Keep up with scheduled maintenance. A well-maintained engine runs more efficiently. Follow the manufacturer’s recommended service intervals for oil changes, air filter replacements, and other maintenance tasks. Consider checking AMG MPG across all years for a broader perspective.