17 MPG combined is the EPA rating for the 2025 Mercedes-Benz GLE580 4Matic. This number might cause some to question it. For a luxury SUV buyer, 17 MPG is not a problem; it’s an expected detail for a strong performing vehicle. This isn’t a car bought for its Prius-beating fuel economy. The GLE580 4Matic is a powerful, opulent, and technologically advanced machine for an owner who puts V8 power, comfort, and Mercedes-Benz brand recognition first. This is a family hauler that can handle long highway drives, tow a substantial boat, and still give its occupants a quiet, luxurious ride. The 17 combined MPG shows what a 4.0-liter twin-turbo V8, with mild-hybrid assist, needs to move nearly 5,700 pounds of German engineering. It’s part of the deal for a driving experience with immediate torque and a satisfying engine sound when pushed.

City and highway performance

The 2025 Mercedes-Benz GLE580 4Matic gets 15 MPG in the city and 20 MPG on the highway. The city figure, 15 MPG, is expected given the vehicle’s weight and the inefficiencies of stop-and-go driving. The 4.0-liter V8, even with its integrated starter-generator (ISG) mild-hybrid system, requires a lot of fuel to get this vehicle moving from a stop and accelerate. The ISG primarily helps with smooth engine restarts for the auto start/stop system and provides a brief, almost unnoticeable electric boost, but it’s not for significant electric-only power that would change city consumption in this V8. The highway figure of 20 MPG is quite good for a large, 5,000-pound SUV with a strong V8. Once at cruising speed, the nine-speed automatic transmission lets the engine run at low RPMs, using the V8’s substantial torque to maintain speed efficiently. Aerodynamics, while better than typical boxy SUVs, still play a role at highway speeds, but the engineering to reduce drag and optimize power delivery is clear in that 20 MPG figure. This split shows the vehicle’s design: it’s built for both city elegance and long-distance comfort, with the understanding that long-distance driving will be its most fuel-efficient mode.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2025 Mercedes-Benz GLE580 4Matic at $3,400. This figure comes from a standard calculation that assumes 15,000 miles of driving per year, with 45% city driving and 55% highway. This mileage is then used with the vehicle’s specific EPA city and highway MPG ratings and national average fuel prices, which the EPA updates regularly. It’s important to know that $3,400 is an estimate for comparison. Your actual annual fuel cost will change based on your local fuel prices, your driving habits (city vs. highway driving), and how many miles you drive. For the typical GLE580 buyer, this $3,400 figure is unlikely to be a concern. Those who buy a vehicle of this type, with a starting price over six figures, generally see fuel expenses as a minor part of the total cost of ownership. They are buying an experience, a level of power, refinement, and prestige where fuel cost is just another operational expense.

Real-world expectations

In real-world driving, expect the 2025 Mercedes-Benz GLE580 4Matic to largely match its EPA estimates, assuming a reasonably balanced driving style. Aggressive driving, frequent hard accelerations, and consistent high-speed cruising will undoubtedly go below the 17 MPG combined figure. The 4.0-liter twin-turbo V8 has immense power available, and using its 510 horsepower and 516 lb-ft of torque is tempting for any driver. When you use that performance, the turbos spool, and the fuel injectors work harder, leading to lower efficiency. Conversely, careful drivers who use ECO mode, accelerate and brake smoothly, and consistently drive at moderate highway speeds might occasionally see figures slightly above the EPA ratings. For instance, a long, steady highway cruise on flat terrain could get closer to 22-23 MPG. However, the true purpose of the GLE580 is not maximum efficiency but power delivery and comfort which, when enjoyed, will push consumption closer to the low end of the EPA scale. This SUV is bought by people who want to feel secure and in control behind the wheel, making merges, passing, and inclines easy, all activities that use more fuel.

How it compares

When comparing the 2025 Mercedes-Benz GLE580 4Matic against its direct competitors, its 17 MPG combined figure places it fairly within the expected range for high-performance luxury SUVs with a V8. Consider the BMW X5 M50i, which, with its 4.4-liter twin-turbo V8, gets 18 MPG combined (16 city/22 highway). This is slightly better than the GLE580, possibly due to small differences in engine tuning or vehicle weight, but they are very similar. The Porsche Cayenne S, with a 4.0-liter twin-turbo V8, gets 19 MPG combined (16 city/23 highway), showing Porsche’s careful engineering for efficiency even in performance vehicles. The Audi SQ8, with its 4.0-liter twin-turbo V8, also records 17 MPG combined (15 city/21 highway), almost identical to the GLE580. Even the Genesis GV80 3.5T (with a V6, not a V8) only gets 20 MPG combined (18 city/23 highway), showing that the V8 premium isn’t as big as one might think when looking at pure luxury SUVs. The buyer of a GLE580 understands these comparisons; they are not looking for best-in-class fuel economy. Instead, they are evaluating the total package, power, features, interior quality, and brand recognition. The similar GLE580 MPG across all years, despite powertrain refinements, shows Mercedes-Benz’s commitment to a consistent performance idea. The small differences in MPG among these rivals are typically too minor to be a primary decision factor for this premium segment, where brand loyalty, driving dynamics, and interior design often matter more. For specific details on all Mercedes Benz fuel economy data, you can visit our Mercedes-Benz section.

Tips to maximize efficiency

While outright fuel economy isn’t the main goal of the GLE580 owner, getting better efficiency when it’s convenient can still help. Use the ECO driving mode, which makes the throttle less responsive, optimizes transmission shift points for lower RPMs, and engages the mild-hybrid system for longer coasting. This can make a difference in stop-and-go city traffic.

Maintain correct tire pressure according to manufacturer specifications. Underinflated tires increase rolling resistance, making the V8 work harder and use more fuel, even if subtly. Check your tires regularly, especially before longer trips.

Plan your routes to avoid unnecessary idling and too much braking and acceleration. The GLE580’s adaptive cruise control and navigation system can help you maintain smooth speeds and anticipate traffic, which leads to more efficient driving.

Limit high-speed driving when possible. While the GLE580 is built for high speeds, aerodynamic drag increases a lot with speed, meaning cruising at 80 mph uses significantly more fuel than maintaining 70 mph, regardless of the V8’s power.

Remove unnecessary weight from the vehicle. While the GLE580 is heavy, removing any rarely used heavy items from the cargo area means less mass for the engine to move, offering a small but cumulative improvement in fuel consumption over time.