17 MPG combined. That’s the number for the 2026 Mercedes-Benz AMG GLE63 S 4matic Plus 4.0L 8-cyl. For a vehicle with a biturbo V8 generating over 600 horsepower, capable of tearing from 0-60 mph in under 3.5 seconds, and weighing in well over two and a half tons, this figure isn’t just acceptable. This car achieves incredible engineering. This isn’t a family hauler designed for frugality; it’s a high-performance SUV for those who demand supercar-level thrust and precision handling, all wrapped in a luxurious, spacious package. The buyer of this AMG GLE63 S understands that raw power and exhilarating speed come with a corresponding appetite for premium fuel. They prioritize the visceral thrill of an AMG V8, the commanding presence, and the prestige of the three-pointed star, recognizing that these attributes inherently lead to fuel consumption figures that place it firmly in the performance vehicle category, not the economy segment.

City and highway performance

Diving into the specifics, the 15 MPG city rating for the GLE63 S reflects the inherent challenges of urban driving for a vehicle of this caliber. Stop-and-go traffic, frequent acceleration spurts, and the sheer inertia of its substantial mass all contribute to a thirstier experience when navigating metropolitan jungles. This 8-cylinder brute is always ready to unleash its power, even in congested environments, and its advanced all-wheel-drive system and nine-speed automatic transmission are constantly working to manage that power, albeit with a fuel penalty. On the open road, the picture brightens slightly, with a highway rating of 20 MPG. Here, the biturbo V8 can settle into a more efficient cruising rhythm, and the transmission can judiciously select higher gears, reducing engine revolutions. However, even on the highway, the performance potential remains ever-present, and any spirited acceleration to overtake slower traffic will swiftly dip into the fuel tank. Drivers of this AMG are not seeking a commuter car; they’re enthusiasts who relish the sound, feel, and overwhelming urge of a hand-built V8, whether it’s for a spirited weekend drive or a commanding presence on a long journey.

Annual fuel cost

The EPA estimates an annual fuel cost of $3,400 for the 2026 Mercedes-Benz AMG GLE63 S 4matic Plus. This figure is calculated based on driving 15,000 miles per year, split between 45% highway and 55% city driving, and assumes current national average fuel prices for premium gasoline. For the individual purchasing a vehicle well into the six-figure range, an annual fuel expenditure of $3,400 is generally considered a relevant, but not prohibitive, cost. This cost is simply another line item in the ownership experience of a high-performance luxury SUV. It reflects the consistent demand for premium unleaded fuel to properly nourish the powerful 4.0L twin-turbocharged V8 engine. Owners of the GLE63 S typically budget for such expenses, understanding that the intoxicating performance and exclusive brand experience inherently come with a higher operational cost than more conventional SUVs. It’s a price willingly paid for the thrill and prestige that this particular AMG delivers.

Real-world expectations

In real-world driving, owners of the AMG GLE63 S should generally anticipate results closely mirroring the EPA’s figures, with a few caveats. The combined 17 MPG is genuinely achievable if one drives conscientiously and avoids constant full-throttle exuberance. However, the very nature and allure of this vehicle make consistent restraint a challenging proposition. The 4.0L 8-cyl engine is designed to deliver immediate, prodigious power, and most drivers will succumb to the temptation to tap into that performance regularly. Those who frequently exploit the AMG’s acceleration capabilities, engage in track days, or navigate heavily congested urban areas will likely see their average MPG dip below the official 17 MPG combined. Conversely, drivers who undertake long highway commutes with minimal traffic and maintain a steady, moderate pace might occasionally exceed the 20 MPG highway rating. Ultimately, real-world fuel economy for the GLE63 S is highly dependent on driving style. For the typical owner, who buys this vehicle precisely for its exhilarating performance, anticipating figures slightly lower than the EPA combined average is a realistic expectation, as they simply cannot resist unleashing the beast.

How it compares

Comparing the 2026 AMG GLE63 S to its direct competitors reveals a consistent truth: high-performance luxury SUVs are thirsty. The BMW X5 M Competition, for instance, typically achieves 15 MPG combined (13 city / 18 highway), putting it slightly behind the AMG in combined efficiency. The Porsche Cayenne Turbo S E-Hybrid offers a unique feature with its plug-in hybrid powertrain, delivering impressive MPGe figures and a better combined conventional fuel economy of 18 MPG (16 city / 20 highway) when running on gasoline, though its higher complexity and weight are factors. Alternatively, the Audi RS Q8 comes in at a similar 16 MPG combined (15 city / 20 highway), showcasing very similar characteristics to the AMG. For all Mercedes Benz fuel economy data, these numbers are par for the course for performance-oriented models. What these comparisons highlight is that the AMG GLE63 S isn’t an outlier. Its fuel consumption figures are entirely consistent with the class leaders it competes against. All of them prioritize blistering performance, advanced engineering, and opulent luxury over outright fuel frugality. The buyer in this segment understands that they are purchasing a pinnacle of automotive engineering, and the fuel economy numbers reflect the power and capability inherent in such a machine. Check out AMG MPG across all years for more detailed comparisons.

Tips to maximize efficiency

While the AMG GLE63 S is built for performance, adopting a few conscious driving habits can help minimize its fuel consumption without sacrificing too much of the fun. Smooth acceleration and braking, rather than aggressive starts and abrupt stops, will significantly reduce the engine’s workload and prevent unnecessary fuel waste. Use the GLE’s driving modes; engaging the “Comfort” or “Individual” settings with efficiency in mind can temper engine responses and optimize transmission shifts for better mileage in everyday driving scenarios.

Maintaining proper tire pressure is a simple yet effective way to ensure the large performance tires aren’t creating undue rolling resistance. Regularly verify your tire pressures, as under-inflated tires not only harm efficiency but also compromise handling and tire life, which is critical for a vehicle of this capability.

Minimize unnecessary weight in the vehicle. While the AMG GLE63 S is a substantial machine, removing heavy items from the cargo area or cabin when they’re not needed can contribute incrementally to better fuel economy, especially over longer distances.

Plan your routes to avoid excessive idling and stop-and-go traffic whenever possible. The city MPG rating of 15 is a direct result of these conditions, and by taking routes that allow for more consistent speeds, you’ll see a noticeable improvement in your average fuel consumption for urban commutes.