24 MPG combined isn’t going to win any hypermiling competitions, but for the 2017 Mercedes-Benz GLC300 4Matic Coupe, it’s a figure that largely meets expectations. This vehicle is about style and presence first, practicality second, and outright fuel sipping a distant third. The GLC Coupe buyer wants the three-pointed star, the swooping roofline, and the elevated driving position, and they’re willing to accept mid-pack fuel economy in exchange.

City and highway performance

The 2017 GLC300 Coupe uses a 2.0L turbocharged four-cylinder engine, paired with a 9-speed automatic transmission (S9). The EPA estimates 22 MPG in the city and 27 MPG on the highway. That city figure is acceptable for stop-and-go traffic where the turbocharger is frequently engaged. Highway driving, where the engine settles into a more relaxed cruise, is unsurprisingly where the GLC300 Coupe comes closest to its advertised fuel efficiency.

The all-wheel drive system, branded as 4Matic, also contributes to a slight fuel economy penalty versus rear-wheel drive models which simply aren’t available on the Coupe.

Annual fuel cost

The EPA calculates an estimated annual fuel cost of $2,400 for the 2017 Mercedes-Benz GLC300 4Matic Coupe. This figure is based on driving 15,000 miles per year, using the EPA’s combined MPG rating, and using national average fuel prices. Fluctuating fuel prices will raise or lower this number in the real world, as will differences in individual driving styles. Those with a heavy foot will see that $2,400 figure climb, while drivers who prioritize smooth acceleration and consistent speeds may well beat the EPA estimates.

Real-world expectations

While the EPA numbers provide a useful benchmark, your actual fuel economy will vary. Fuel economy is dependent on driving habits and conditions. Frequent short trips will likely result in lower MPG than longer highway cruises. Keeping your tires properly inflated and performing regular maintenance, as outlined in the owner’s manual, is important for optimal fuel efficiency. Aggressive acceleration is a sure way to reduce MPG, so try to drive smoothly. Those who want to can use our website to check the GLC300 MPG across all years.

How it compares

The GLC300 4Matic Coupe’s fuel economy puts it in a competitive but not class-leading position within its segment. The BMW X4 xDrive28i, its closest competitor at the time, achieves a slightly better 23 city / 30 highway MPG. The Porsche Macan base model delivers similar fuel efficiency. An Audi SQ5, with its powerful V6 engine, sacrifices economy for performance, coming in significantly lower. The GLC’s appeal isn’t primarily about less gas; it’s about luxury, style, and the comfort of the Mercedes-Benz brand, explaining why some buyers are willing to pay slightly more at the pump. Be sure to check all Mercedes Benz fuel economy data for a sense of how the GLC Coupe stacks up against other models in the lineup.

Tips to maximize efficiency

Take advantage of the GLC300’s driving modes. The “Eco” mode optimizes the engine and transmission for fuel efficiency, often resulting in smoother acceleration and earlier upshifts. These changes can make a noticeable difference, especially in city driving.

Keep your speed consistent on the highway. Using cruise control on flat stretches of road can prevent unnecessary acceleration and deceleration, saving fuel. Anticipate traffic changes and avoid sudden braking whenever possible.

Avoid carrying unnecessary weight. Extra cargo in the trunk adds strain on the engine, reducing fuel economy. Remove any items that aren’t essential for your daily commute or trips.

Ensure your tires are properly inflated per the vehicle’s specifications. Underinflated tires increase rolling resistance, forcing the engine to work harder. Check your tire pressure regularly, especially during seasonal temperature changes.

Consider using a fuel additive designed to clean your engine’s fuel injectors. A cleaner fuel system can improve combustion, which leads to optimal performance and an efficient fuel burn. Always consult your owner’s manual before adding any fuel additives to ensure they are compatible with your vehicle.