23 MPG combined won’t win any fuel economy awards. It’s the reality for drivers who prioritize style and image in a compact luxury SUV. The 2019 Mercedes-Benz GLC300 4matic Coupe, with its sloping roofline and elevated ride height, is for a specific buyer, one who will sacrifice some efficiency for a distinctive look and the security of all-wheel drive. This isn’t a car for hypermilers; it’s a statement vehicle, and the fuel economy reflects that trade-off.

City and highway performance

The GLC300 Coupe achieves 21 MPG in the city and 27 MPG on the highway. The city figure is understandable, given the stop-and-go nature of urban driving. The 2.0L turbocharged engine, while relatively small, still needs to work to move the GLC’s weight from a standstill repeatedly. The highway figure of 27 MPG is more respectable and attainable during steady-state cruising. The nine-speed automatic transmission plays an important role here, allowing the engine to stay in its sweet spot at higher speeds, but aggressive driving or frequent overtaking will quickly erode that number.

Annual fuel cost

The EPA estimates an annual fuel cost of $2,500 for the 2019 Mercedes-Benz GLC300 4matic Coupe. This is based on driving 15,000 miles per year and using national average fuel prices. Of course, this number will fluctuate based on your individual driving habits and the prevailing cost of gasoline in your area. If you drive aggressively or live in an area with high fuel prices, expect to pay more. If you drive mostly highway miles and are gentle on the throttle, you might spend less than the EPA estimate. Consider this figure a benchmark, a starting point for budgeting your fuel expenses. Be sure to consult GLC300 MPG across all years to compare MPG variations.

Real-world expectations

The EPA provides a standardized estimate, but real-world fuel economy can vary considerably. Don’t be surprised if your actual MPG falls slightly below the official figures, especially during the colder winter months when fuel formulations change and engine idling is more frequent. Driving style is important. Frequent hard acceleration, aggressive braking, and high-speed cruising will all negatively impact fuel economy. Smooth acceleration, anticipatory driving, and maintaining a steady speed will help you achieve closer to the EPA estimates. Some drivers report achieving the official highway MPG figure, even exceeding it slightly, while others consistently struggle to reach the combined rating.

How it compares

Compared to its rivals, the GLC300 Coupe’s fuel economy is in the middle of the pack. The BMW X4 xDrive30i, with its similar 2.0L turbocharged engine, offers comparable MPG figures around 23 MPG combined. The Acura RDX with its available SH-AWD system comes in around 23 MPG combined as well. The Audi Q5 Sportback equipped with its 45 TFSI engine variant also hovers around the same 23 MPG combined rating. These comparisons matter to the buyer considering a GLC300 Coupe because they highlight that while the design is unique, the fuel efficiency compromise is common within the segment. The vehicle’s appeal lies more in its aesthetics than its eco-friendliness.

Tips to maximize efficiency

Use the GLC300’s drive mode selector to your advantage. The “Eco” mode optimizes the engine and transmission settings for maximum fuel efficiency, softening the throttle response and prompting earlier upshifts. While it may not be ideal for spirited driving, it’s a great option for everyday commuting and long highway trips where fuel economy is a priority.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, which forces the engine to work harder and consumes more fuel. Check your tire pressure regularly (ideally every couple of weeks), and inflate them to the recommended level listed on the doorjamb sticker. This simple step can make a noticeable difference in your MPG.

Avoid unnecessary cargo. The heavier your vehicle, the more fuel it consumes. Remove any unnecessary items from the trunk and passenger compartment to reduce weight. Leaving heavy items like golf clubs or tools in the car when they’re not needed can have a surprisingly large impact on fuel economy, especially during city driving.

Plan your trips strategically. Combine multiple errands into a single trip to minimize cold starts. Cold starts are particularly fuel-intensive because the engine needs to work harder to reach its optimal operating temperature. By grouping your errands together, you can reduce the number of cold starts and improve your overall fuel economy. See all Mercedes Benz fuel economy data.