20 MPG combined isn’t going to win any hypermiling contests, but that’s not the point of the 2021 Mercedes-Benz AMG GLC 43 4matic Coupe. This vehicle is designed for a specific kind of driver: one who prioritizes sharp handling, aggressive styling, and a potent twin-turbo V6 over outright fuel efficiency. They want the practicality of a crossover with the aesthetic of a coupe, and they’re willing to pay a premium, at the pump and upfront, to get it.

City and highway performance

The EPA estimates the GLC 43 Coupe will achieve 17 MPG in the city and 24 MPG on the highway. This difference between city and highway figures tells a story about its engine and transmission tuning. The 9-speed automatic transmission is geared for relaxed cruising at higher speeds, allowing for respectable highway mileage when you keep your foot out of the throttle. City driving, on the other hand, involves more frequent acceleration, stop-and-go traffic, and tapping into the turbocharger, all of which contribute to a noticeable drop in fuel efficiency. Those who spend most of their time navigating urban environments will find themselves closer to the 17 MPG mark, while those with longer commutes may see figures that approach the 24 MPG highway rating.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2021 Mercedes-Benz AMG GLC 43 Coupe to be $2,900. This figure is based on driving 15,000 miles per year and using national average fuel prices, which are subject to change. It’s a substantial yearly expense and a significant consideration for potential buyers. Anyone considering the purchase of this vehicle needs to understand that premium fuel is required, and this directly impacts the cost per gallon, adding to the overall expense.

Real-world expectations

While the EPA provides a standardized estimate, real-world fuel economy will always vary based on individual driving habits, traffic conditions, and even weather. Those who regularly exploit the GLC 43’s performance potential, enjoying the rapid acceleration and engaging handling, will likely see figures below the EPA estimates. Conversely, drivers who adopt a more conservative style and prioritize smooth acceleration may be able to achieve numbers closer to, or even slightly above, the official ratings. Tire pressure, vehicle maintenance, and the type of terrain you typically drive on also play a role in your MPG.

How it compares

Compared to its competitors, the GLC 43’s fuel economy sits squarely in the middle of the performance SUV coupe segment. The BMW X4 M40i, with its 3.0L inline-six, achieves a similar 21 MPG combined. The Audi SQ5 Sportback, another contender in this space, also hovers around 20 MPG combined. If fuel efficiency is a top priority, a buyer might consider a non-AMG GLC 300 variant, which achieves a more reasonable 25 MPG combined. However, a choice like that means sacrificing a significant amount of power and performance. For those who are already looking at performance SUVs, all Mercedes Benz fuel economy data suggest that the GLC 43 delivers performance on par with other AMG models, but within a more practical footprint. For those interested in older models, AMG MPG across all years is also available to compare models across different years.

Tips to maximize efficiency

Anticipate traffic flow and avoid sudden acceleration or braking. The turbocharger is a significant contributor to fuel consumption, so minimizing its use will help to improve gas mileage. Maintain a steady speed whenever possible, and use cruise control on the highway to avoid unnecessary speed fluctuations.

Ensure tires are properly inflated. Underinflated tires increase rolling resistance, which negatively impacts fuel economy. Check tire pressure regularly and inflate to the manufacturer’s recommended specifications.

Reduce unnecessary weight in the vehicle. Extra cargo adds to the overall load, requiring the engine to work harder and consume more fuel. Remove any items that are not essential for daily driving.

Use premium fuel as recommended by Mercedes-Benz. While it might be tempting to use regular fuel to save money, the GLC 43’s engine is designed to run optimally on premium fuel. Using lower-grade fuel can reduce performance and potentially damage the engine over time.

Consider using the ECO driving mode if equipped. This mode typically adjusts engine and transmission settings to prioritize fuel efficiency over performance. While it may not provide the same level of responsiveness, it can help to improve gas mileage in certain driving conditions.