18 MPG combined is a reminder that the 2019 Mercedes-Benz AMG GLC63 4matic Coupe isn’t about saving fuel. It’s a snarling, high-performance machine draped in a stylish coupe body with just enough SUV practicality to (almost) justify its existence. The people who buy this AMG aren’t prioritizing efficiency, they’re buying a statement, a visceral experience, and the right to unleash a thunderous V8 at any given moment.

City and highway performance

The EPA estimates the GLC63 AMG Coupe at 16 MPG in the city. Considering the stop-and-go nature of urban driving and the temptation to exploit the engine’s readily available power, this figure is hardly surprising. The 22 MPG highway rating is more respectable, but even that number demands restraint. Drive it hard, or encounter significant headwinds, and that number will plummet. The nine-speed automatic transmission does its best to keep the engine in its sweet spot, but ultimately, the thirsty 4.0L V8 dominates the fuel consumption equation, especially with the constant demand from the 4matic all-wheel-drive system.

Annual fuel cost

Prepare for an annual fuel bill that matches the vehicle’s character. The EPA calculates the annual fuel cost for the 2019 Mercedes-Benz AMG GLC63 4matic Coupe at $3,200. This figure is based on driving 15,000 miles per year, with a mix of city and highway conditions, and using the EPA’s estimate for average fuel prices. Keep in mind that premium fuel is required, a factor that further elevates the cost of ownership. This also means buyers will likely spend more, since a performance vehicle like this is more likely to be driven aggressively, which lowers gas mileage. While some may find ways to mitigate the overall expense, it will likely be higher than the EPA estimate, given the 4.0L V-8 engine.

Real-world expectations

While the EPA figures provide a benchmark, real-world MPG for the GLC63 AMG Coupe is highly driver-dependent. Those with a heavy foot and a penchant for rapid acceleration will likely see numbers significantly below the EPA estimates. Conversely, drivers who prioritize smooth acceleration, anticipate traffic flow, and make liberal use of the ECO driving mode can potentially achieve figures closer to the official ratings. However, the true appeal of this vehicle lies in its performance capabilities, and resisting the urge to unleash its power entirely negates its fundamental purpose. Therefore, expect to spend more time at the pump.

How it compares

The GLC63 AMG Coupe exists in a niche segment where performance and style often outweigh fuel economy concerns. The BMW X4 M Competition, for example, achieves a similar rating of 16 MPG city and 22 MPG highway. The Porsche Macan Turbo, while offering a slightly more efficient package, still falls within the same ballpark, at 17 MPG city and 23 MPG highway. These rivals, like the AMG, trade efficiency for sheer driving enjoyment, but the MPG differences are marginal enough that the choice often comes down to brand loyalty, specific features, or personal preference. Across a larger selection of vehicles, all Mercedes Benz fuel economy data shows an average closer to 25 MPG combined. However, the AMG is set apart, and AMG MPG across all years will show a similar trend.

Tips to maximize efficiency

While getting maximum fuel efficiency from the GLC63 AMG Coupe might seem counterintuitive, a few strategies can help minimize consumption. Gentle acceleration is key. Avoid aggressive starts and hard braking, allowing the engine and transmission to operate smoothly and efficiently. This is especially important with a high-horsepower engine like this.

Use the ECO driving mode when appropriate, such as during highway cruising or low-speed city driving. This mode adjusts throttle response and transmission mapping to prioritize fuel conservation. Understand that Eco Mode will lower performance, and the car will feel less powerful.

Ensure proper tire inflation. Maintaining the recommended tire pressure reduces rolling resistance, leading to improved fuel economy. Regularly check and adjust your tire pressure, especially during changes in ambient temperature.

Minimize idling. Avoid prolonged idling, as it consumes fuel without covering any distance. If you anticipate a stop of more than a minute, it’s best to turn off the engine, especially if you are in a city environment, which will also help with keeping emissions low.

Plan your routes strategically. Avoid congested areas and opt for routes with consistent speeds and fewer stops. Using navigation apps to identify the most efficient routes can help minimize fuel consumption over time. These routes sometimes take longer, so make sure you have the extra time before taking them.