25 MPG combined might seem unremarkable, but for the 2017 Mercedes-Benz AMG GLA45 4matic, it’s almost beside the point. This isn’t a vehicle purchased for saving money on gas. It’s a compact performance crossover, a pocket rocket designed for drivers who want exhilarating acceleration and sharp handling over ultimate fuel efficiency. Think young professionals, urban dwellers with a love for speed, or anyone who considers their daily commute a chance for a thrill. For these drivers, the GLA45’s aggressive styling and potent powertrain are worth the compromise at the pump.

City and highway performance

The EPA estimates the GLA45 at 22 MPG in the city and 28 MPG on the highway. These figures show the compromises with a high-performance vehicle. The city MPG is affected by stop-and-go traffic, where the engine’s turbo lag and the need for frequent acceleration hurt fuel economy. The highway MPG, while better, isn’t class-leading because of the crossover design making it less aerodynamic and the engine’s need to perform. The AMG-tuned automatic transmission, while lightning-fast in its shifts, isn’t primarily designed to maximize fuel economy; its focus is on maximizing power delivery.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2017 Mercedes-Benz AMG GLA45 4matic at $2,300. This figure is based on driving 15,000 miles per year and using the national average fuel price at the time of calculation. Your actual fuel costs will vary depending on your driving habits, the type of fuel you use (premium is recommended for optimal performance), and local fuel prices. Consider this a benchmark for comparison rather than a definitive prediction of your spending.

Real-world expectations

While the EPA figures provide a standardized comparison, real-world fuel economy for the GLA45 often falls slightly short. Drivers who accelerate quickly, those who frequently engage the car’s Sport or Race modes, or those who primarily drive in congested urban environments can expect to see numbers closer to the low 20s, or even high teens, in mixed driving.

However, drivers who accelerate smoothly, limit their use of boost, and spend more time on the open highway might achieve figures closer to the EPA estimates, or even slightly better. Aggressive driving will burn more fuel, as will using the air conditioning on hot days. Watch the car’s trip computer to learn more about your driving style.

How it compares

Compared to its competitors, the GLA45’s fuel economy is in the middle of the pack for performance-oriented subcompact SUVs. For instance, the Audi SQ5, while offering more space, is rated at around 19 MPG combined from its supercharged V6 version. On the other hand, a BMW X2 M35i manages a 25 MPG combined. Looking across all Mercedes Benz fuel economy data, the GLA45 is in the lower middle for fuel economy. The Porsche Macan Turbo gets even worse fuel economy at around 19 MPG combined.

The GLA45 delivers a unique blend of performance, agility, and practicality to distinguish it from these competitors. If you are only looking at fuel economy, you can review AMG MPG across all years and models.

Tips to maximize efficiency

Resist the urge to constantly engage the car’s Sport or Race modes. These modes prioritize throttle response and shift speed over fuel efficiency. Use Comfort mode for everyday driving to allow the engine and transmission to operate in a more relaxed and economical manner.

Maintain consistent tire pressure. Underinflated tires increase rolling resistance, which requires the engine to work harder, resulting in decreased fuel economy. Check your tire pressure regularly and inflate them to the manufacturer’s recommended specifications, typically found on a sticker inside the driver’s side doorjamb.

Avoid unnecessary idling. Letting the car idle for extended periods, especially in cold weather, wastes fuel. If you anticipate a prolonged stop, such as waiting in a parking lot, turn off the engine. Modern engines are designed to restart quickly and reliably, so you won’t experience any significant delays.

Practice smooth acceleration and braking. Avoid aggressive starts and hard braking, as these actions consume more fuel. Anticipate traffic flow and maintain a steady speed whenever possible. Using cruise control on the highway can help maintain a consistent pace and improve fuel efficiency.