15 MPG combined is the stark reality for anyone considering a 2018 Mercedes-Benz AMG GLE63 S. It’s a figure that would be deeply concerning for a compact sedan, but for high-performance, hand-built SUVs that can accelerate to 60 mph faster than many sports cars, it’s almost a badge of honor. This isn’t a vehicle for those looking for less gas; it’s for those who want raw power and handcrafted luxury, and are willing to pay the price at the pump.

City and highway performance

Driving the AMG GLE63 S in the city shows its thirsty nature. Stop-and-go traffic sees the 5.5L twin-turbo V8 guzzle fuel at a rate of 14 MPG. The seven-speed automatic transmission, while generally smooth, can sometimes feel hesitant in urban environments, leading to more aggressive throttle inputs and even lower fuel economy.

On the open highway, the GLE63 S fares slightly better, achieving 18 MPG. Even this number is modest, especially when compared to more modern, downsized turbocharged engines. The fuel consumption is a direct result of the engine’s immense power output and the vehicle’s substantial weight. It’s a physics equation where the AMG prioritizes performance rather than efficiency.

Annual fuel cost

According to the EPA, the annual fuel cost for the 2018 Mercedes-Benz AMG GLE63 S is $3,850. This figure is derived from driving 15,000 miles per year, with a mix of city and highway driving, using the national average fuel price when the estimate was generated. It’s a significant expense, one that potential buyers must factor into the overall cost of ownership. Some may dismiss it as negligible given the GLE63 S’s price tag, but consistent high fuel costs can quickly accumulate and become a notable burden, even for affluent owners.

Real-world expectations

Don’t expect to consistently match the EPA estimates in the real world. The 15 MPG combined figure is an average, and your actual fuel economy will vary depending on driving style, traffic conditions, and vehicle maintenance. Aggressive acceleration, frequent short trips, and neglecting regular maintenance can all negatively impact fuel efficiency. Owners who frequently exploit the engine’s power will likely see even lower numbers, potentially dipping into the single digits during spirited driving sessions.

By contrast, those who adopt a more conservative driving style and primarily use the vehicle for highway cruising might come closer to the EPA estimates. Be realistic about your driving habits and potential fuel costs before buying a GLE63 S.

How it compares

The fuel economy of the 2018 AMG GLE63 S is behind some of its competitors, even though they often sacrifice some performance. For instance, a 2018 BMW X5 M, also a high-performance SUV, manages a slightly better 16 MPG combined. A Porsche Cayenne Turbo from the same year achieves similar MPG numbers. This difference, although seemingly small, can add up over time. Buyers considering the AMG GLE63 S likely prioritize the unique character and hand-built engine of the AMG over small fuel savings. If maximum MPG is necessary, they might be better suited to a standard GLE with a less potent engine option that offers better mileage. For access to all Mercedes Benz fuel economy data, drivers can browse updated information online.

Tips to maximize efficiency

Despite its inherent thirst, there are steps you can take to improve the fuel economy of your AMG GLE63 S. Avoid aggressive acceleration and hard braking. Smooth, gradual inputs are key to minimizing fuel consumption, especially in city driving. Anticipate traffic flow and maintain a consistent speed whenever possible to avoid unnecessary acceleration and deceleration.

Ensure your GLE63 S is properly maintained. Regular tire pressure checks, oil changes, and air filter replacements can all contribute to improved fuel efficiency. A well-maintained engine runs more efficiently and requires less fuel to produce the same amount of power. Using the correct grade of fuel, as recommended by Mercedes-Benz, is also important.

Minimize idling. Letting the engine idle for extended periods wastes fuel. If you’re stopped for more than a minute or two, turn off the engine. Modern engines are designed to restart quickly and efficiently, minimizing any potential wear and tear from frequent stops and starts. While the GLE63 S doesn’t have an official auto stop/start system, consciously eliminating excessive idling is a straightforward tactic.

Lighten the load. Carrying excessive weight in your vehicle reduces fuel efficiency. Remove any unnecessary items from the trunk or cargo area to minimize the amount of energy required to propel the vehicle forward. Even small weight reductions can have a noticeable impact on fuel consumption over time.

Plan your routes strategically. Avoid congested areas and peak traffic times whenever possible. Opt for routes with fewer stops and starts to maintain a more consistent speed and minimize fuel-wasting acceleration. Using navigation apps to find the most efficient route is also a useful way to get the AMG MPG across all years that suits your needs.