14 MPG combined is the stark reality for anyone considering a 2019 Mercedes-Benz AMG GLE63 with the 5.5L V8. Nobody buys this hand-built AMG SUV because they’re concerned about fuel economy. This vehicle is designed for devastating acceleration, a thunderous exhaust note, and presence, pure, unadulterated performance draped in a veneer of luxury. The fuel bill is simply the price of admission for the privilege. This SUV appeals to a niche buyer who prioritizes performance and exclusivity above all else. For them, the V8 rumble and neck-snapping acceleration are essential, fuel be damned.

City and highway performance

The EPA estimates 12 MPG in the city and 18 MPG on the highway for the 2019 AMG GLE63. These numbers reflect the realities of a large displacement, high-performance engine working hard to move a vehicle that weighs over 5,200 pounds. Stop-and-go city driving increases fuel consumption, as the engine constantly battles inertia.

On the highway, the 7-speed automatic transmission helps, but the V8 still requires a considerable amount of fuel to maintain higher speeds, especially when summoning its prodigious power for overtaking. The relatively low highway figure is a reflection of the engine’s inherent thirst and the vehicle’s considerable aerodynamic resistance.

Annual fuel cost

According to the EPA, the 2019 Mercedes-Benz AMG GLE63 will cost approximately $4,150 per year in fuel. This figure is based on driving 15,000 miles annually, with 55% of those miles driven in the city and 45% on the highway. The calculation also uses the national average fuel price at the time of the EPA’s testing.

This is an average; drivers with heavier feet or those living in areas with higher fuel costs will likely spend significantly more. This figure should serve as a reminder of the true cost of owning a high-performance SUV like the GLE63.

Real-world expectations

While the EPA provides a standardized estimate, real-world MPG will inevitably vary based on driving habits, traffic conditions, and even the weather. Expect to see figures near the EPA estimates if you drive conservatively, mostly on the highway, and avoid aggressive acceleration. Spirited driving, frequent short trips, and heavy city traffic will push the average well below the advertised numbers. Some owners report combined MPG in the single digits during enthusiastic driving, underscoring the direct relationship between performance and fuel consumption in this particular vehicle.

Consider the EPA figure a best-case scenario, and prepare for potentially lower numbers in everyday driving.

How it compares

The AMG GLE63’s fuel economy is predictably poor when compared to other SUVs in its class. For example, the BMW X5 M, another high-performance SUV, manages around 16 MPG combined. A Porsche Cayenne Turbo, while offering similar levels of performance, achieves around 17 MPG combined. Even the more powerful AMG GLE63 S, with its upgraded engine, reports the same 14 MPG combined. The slightly better fuel economy of its competitors reveals that some high-performance SUVs can achieve better efficiency through advancements in engine technology and weight reduction. The buyer of the GLE63 likely considers the trade-off of raw power and sound acceptable, overlooking the slight fuel economy deficit.

If fuel economy is a primary concern, exploring all Mercedes Benz fuel economy data would guide you to a different vehicle.

Tips to maximize efficiency

While maximizing fuel economy might not be the top priority for an AMG GLE63 owner, there are a few strategies to improve efficiency. Avoid aggressive acceleration and hard braking. The V8 engine responds best to smooth inputs. The fewer times you bury the accelerator, the better the fuel economy will be. Gentle acceleration and anticipating traffic flow will significantly reduce fuel consumption.

Ensure the tires are properly inflated. Underinflated tires create more rolling resistance, forcing the engine to work harder. Check the tire pressure regularly and maintain it at the recommended levels. This simple step can improve fuel economy and extend the life of your tires. You should also keep the tires correctly aligned.

Reduce unnecessary weight. Hauling around extra cargo puts additional strain on the engine, negatively impacting fuel economy. Remove any unnecessary items from the vehicle to minimize weight and improve efficiency. This is especially helpful for weekend trips, where the SUV is more likely to be loaded down with gear.

On longer trips, use cruise control when appropriate. Maintaining a consistent speed on the highway can improve fuel economy compared to constantly accelerating and decelerating. Be mindful of the terrain and adjust the cruise control accordingly to avoid unnecessary downshifts. If you spend the majority of time at high speeds, then AMG MPG across all years will fluctuate greatly.