23 MPG combined might dissuade some buyers, but not drivers of the 2021 Mercedes-Benz AMG GLA45 4matic. This vehicle isn’t bought for fuel efficiency, but for its ferocious acceleration, tenacious grip, and edgy styling. Owners expect to pay more at the pump for the performance this hot hatch delivers, and that potent 2.0L 4-cylinder is the reason.

City and highway performance

The AMG GLA45 gets an EPA-estimated 20 MPG in the city and 27 MPG on the highway. These numbers reflect the engine’s characteristics and the calibration of the eight-speed automatic transmission (AM8). In cities, the need for frequent acceleration, coupled with stop-and-go traffic, lowers the fuel economy. On the open road, however, the GLA45 can deliver more respectable figures, though the temptation to use the available power reduces fuel efficiency.

Annual fuel cost

The EPA estimates that the annual fuel cost for the 2021 Mercedes-Benz AMG GLA45 4matic will be $2,500. This figure is based on driving 15,000 miles per year and using national average fuel prices, making it a useful benchmark for comparison despite fluctuations in gas prices. Remember this is an estimate. Aggressive driving, frequent short trips, or consistently exceeding posted speed limits will all significantly increase your real-world fuel expenses. Drivers should also be aware that this model requires premium fuel, impacting the cost per gallon compared to regular fuel.

Real-world expectations

While the EPA provides a standardized testing methodology, real-world fuel economy depends heavily on driving habits and conditions. Expect to see figures potentially lower than 20 MPG in heavily congested city environments, especially with a heavy foot. Conversely, longer highway drives at consistent speeds may yield closer to, or even slightly exceed, the 27 MPG rating. Remember, the AMG GLA45 is engineered for performance, and its engine management system will prioritize power delivery over fuel conservation when requested by the driver.

How it compares

Compared to its competitors, the AMG GLA45’s fuel economy isn’t a standout feature. The BMW X2 M35i, another performance-oriented subcompact SUV, delivers a nearly identical 23 MPG combined. The Audi SQ3, while not sold in the US, achieves similar economy in European markets. A more direct comparison could be made to the Porsche Macan, but even the base 2.0L turbo Macan comes in around 21 MPG combined, while offering less peak power than the AMG GLA45. This buyer isn’t primarily focused on maximizing MPG; they’re seeking a blend of practicality and performance. For context, you can view AMG MPG across all years.

Tips to maximize efficiency

Avoid aggressive acceleration. The AMG GLA45 is temptingly quick, but each prod of the accelerator pedal consumes additional fuel. Practice smooth, progressive acceleration to minimize fuel consumption, especially in city driving. Think of it as saving the power for when you truly need it.

Use the driving modes intelligently. The GLA45 comes equipped with selectable driving modes, including a Comfort mode designed for everyday driving. Selecting this mode softens throttle response and optimizes shift patterns for improved fuel economy compared to the sportier settings.

Maintain proper tire inflation. Underinflated tires increase rolling resistance, leading to reduced fuel efficiency. Check your tire pressures regularly and inflate them to the recommended levels, found on the doorjamb sticker. This small step can make a noticeable difference over time, and contribute to extended tire life.

Reduce unnecessary weight. Carrying excess cargo in your vehicle reduces fuel economy. Remove any unnecessary items from the trunk or cargo area to minimize weight and improve efficiency. This is particularly important with a smaller vehicle like the GLA45, where every pound counts.

Minimize idling. Excessive idling consumes fuel without covering any distance. If you anticipate being stopped for more than a minute, turn off the engine. Modern vehicles restart quickly and efficiently, and avoiding prolonged idling can save a surprising amount of fuel over the long run. Owners interested in more all Mercedes Benz fuel economy data should check out our other model pages.