26 MPG combined isn’t going to win any fuel efficiency awards, but it’s a figure most 2017 Mercedes-Benz AMG CLA45 4matic owners readily accept. They’re not prioritizing thriftiness above all else. They want a potent, sharp-handling, and stylish compact performance car. The CLA45 delivers all of that, and its fuel consumption, while not stellar, isn’t egregious enough to dissuade its target demographic.

City and highway performance

The EPA estimates of 23 MPG in the city and 30 MPG on the highway reflect the car’s dual nature. In urban environments, stop-and-go traffic will tax even the most efficient engines. The AMG-tuned 2.0L turbo, while advanced, is operating under significant boost pressure much of the time, impacting fuel consumption. Out on the open road, where a steady throttle input can be maintained, the CLA45 shows better composure, pulling down numbers closer to that 30 MPG estimate. Of course, resisting the urge to exploit the engine’s 375 horsepower output is key to achieving those figures.

Annual fuel cost

The EPA calculates the annual fuel cost for the 2017 Mercedes-Benz AMG CLA45 4matic at $2,250. This figure is based on driving 15,000 miles per year and using national average fuel prices. It’s important to recognize that this is an estimate, and your actual fuel costs may vary depending on your driving habits, the type of fuel you use, and local fuel prices. If you drive more aggressively, participate in frequent track days, or reside in an area with higher fuel costs, expect to surpass that $2,250 figure. For those looking at all Mercedes Benz fuel economy data, remember variances happen across the board.

Real-world expectations

Real-world MPG for the CLA45 4matic typically falls slightly below the EPA estimates. Expect to see combined figures hovering between 22 and 25 MPG in mixed driving conditions. If your commute is heavily weighted towards city driving, 20 MPG, or even slightly less, isn’t out of the question. Highway runs can yield results closer to 30 MPG, but frequent bursts of acceleration, a common occurrence given the car’s eagerness, will quickly diminish fuel economy. The AMG MPG across all years is predictably lower than its mainstream Mercedes cousins.

How it compares

Compared to its direct competitors, the 2017 Mercedes-Benz AMG CLA45 4matic sits in the middle of the pack when it comes to fuel economy. The Audi RS 3, with its 2.5L turbocharged five-cylinder engine, achieves a similar 22 MPG city and 31 MPG highway, making it a close competitor in both performance and fuel efficiency. The BMW M2, while engaging to drive, typically returns figures in the low 20s combined. Buyers often cross-shop these cars, and while fuel economy isn’t the primary deciding factor, it plays a role. Those considering the CLA45 but prioritize fuel efficiency above all else might consider non-AMG versions of the CLA offered with smaller, more economical engines.

Tips to maximize efficiency

Aggressive acceleration is the enemy of fuel economy in the CLA45. Make gentle, progressive inputs to the throttle, especially when leaving a stop or merging onto the highway. Use the car’s ample torque, but avoid consistently burying the pedal, as this will dramatically reduce fuel efficiency.

Pay attention to tire pressure. Maintaining the correct pressure ensures optimal rolling resistance, which directly impacts fuel consumption. Refer to the sticker on the driver’s side door jamb for the manufacturer’s recommended tire pressure. Periodically checking and adjusting tire pressure can lead to a noticeable improvement in MPG.

Use cruise control on the highway. By maintaining a consistent speed, cruise control minimizes unnecessary acceleration and deceleration. This helps to maintain a more consistent engine load, improving fuel economy. However, be mindful of traffic conditions and avoid overuse of cruise control in congested areas.

Consider the benefits of “Comfort” mode, if equipped. While the AMG CLA45 is built for performance, selecting a less aggressive drive mode can dampen throttle response, leading to a smoother and more fuel-efficient driving experience. This mode is best reserved for longer highway cruises or relaxed city driving. Comfort mode will certainly improve MPG.

Reduce unnecessary weight in the vehicle. Carrying extra cargo can affect the car’s overall efficiency. Remove any items from the trunk or back seats that aren’t essential. The lighter the car, the less energy it takes to accelerate and maintain speed, and the better your fuel economy will be.