The 2020 Mercedes-Benz AMG GLC43 4MATIC Coupe gets 21 MPG combined, a figure unlikely to dissuade buyers drawn to its blend of performance, style, and brand cachet, rather than fuel efficiency. This isn’t a practical commuter car, it’s a fairly thirsty statement. The GLC43 Coupe occupies a unique space, a rakishly styled compact SUV coupe with AMG’s performance DNA. However, that performance comes at a cost.

City and highway performance

EPA estimates suggest 18 MPG in the city and 24 MPG on the highway. The city figure reflects stop-and-go conditions where the GLC43’s turbocharged V6 works harder, and its weight becomes more apparent. Highway driving allows the 9-speed automatic transmission to settle into higher gears, reducing engine RPM and improving fuel consumption. Even on the highway, aggressive driving will quickly erode those gains. The GLC43’s addictive exhaust note and readily available power often tempt drivers to push harder, negating any potential for conservative fuel consumption. These figures are achievable with a mindful approach however, they are unlikely to be the norm for most owners.

Annual fuel cost

The EPA calculates the annual fuel cost for the 2020 Mercedes-Benz AMG GLC43 4MATIC Coupe at $2,750. This figure is based on driving 15,000 miles per year, using national average fuel prices. This is an estimate; actual fuel costs will vary based on individual driving habits, local fuel prices, and the type of fuel used. The GLC43 recommends premium fuel, which typically carries a higher price per gallon, further increasing the overall cost of ownership. Using premium fuel is critical to maintain the engine’s performance and longevity, and failing to use it can negatively impact fuel economy and potentially damage the engine. Owners should factor in these nuances when budgeting for fuel expenses.

Real-world expectations

While the EPA provides a standardized benchmark, real-world fuel economy often differs. Aggressive acceleration, frequent short trips, and traffic congestion can all significantly reduce MPG. Owners who frequently engage the GLC43’s sport modes or use its performance capabilities should anticipate fuel economy figures at the lower end of the EPA range, or even below. Those who prioritize smooth, consistent driving and spend more time on the highway may see slightly improved figures. Achieving the EPA estimates consistently will require a conscious effort to modify driving habits.

How it compares

Compared to its rivals, the GLC43’s fuel economy paints a clear picture. The BMW X4 M40i, another performance-oriented SUV coupe, achieves a similar 21 MPG combined. The Porsche Macan S, while offering comparable performance, manages a slightly better 19 MPG city and 24 MPG highway, according to EPA estimates. The Audi SQ5, in SUV form, gets 18 MPG city, 24 MPG highway. These differences, although seemingly small, can add up over time. For buyers prioritizing less gas, these alternatives might be more appealing. For those specifically seeking the AMG’s unique blend of performance and luxury, the slight MPG deficit is often an acceptable trade-off. See AMG MPG across all years.

Tips to maximize efficiency

Drive smoothly and avoid aggressive acceleration. The GLC43’s twin-turbocharged V6 is responsive, but rapid acceleration consumes a significant amount of fuel. Anticipate traffic flow and maintain a consistent speed whenever possible to minimize unnecessary acceleration and braking.

Use the “Comfort” driving mode. This mode optimizes the engine and transmission for fuel efficiency, providing a more relaxed driving experience and reducing fuel consumption compared to the “Sport” or “Sport+” modes. It is tempting to always engage the performance-oriented settings, but choosing Comfort mode for everyday driving can yield noticeable fuel savings.

Ensure proper tire inflation. Correctly inflated tires reduce rolling resistance, improving fuel economy. Check your tire pressure regularly and inflate tires to the recommended pressure listed on the doorjamb sticker. Even a small decrease in tire pressure can negatively impact fuel efficiency.

Minimize idling. Excessive idling wastes fuel. If you anticipate being stationary for more than a minute or two, turn off the engine. Modern engines are designed to restart quickly and efficiently, making it more fuel-efficient to turn off the engine than to let it idle unnecessarily. Also, explore all Mercedes Benz fuel economy data.

Keep the vehicle properly maintained. Regular maintenance, including oil changes and air filter replacements, ensures that the engine is running efficiently. A well-maintained engine consumes less fuel and operates at its peak performance. Follow the manufacturer’s recommended maintenance schedule to maximize fuel economy and extend the vehicle’s lifespan.