18 MPG combined. Let’s be honest, nobody choosing the 2022 Mercedes-Benz GLE580 4matic is prioritizing fuel efficiency. This is a statement vehicle, a luxurious and powerful SUV designed for effortless cruising and confident performance. Its 4.0L V8, augmented by mild hybrid technology, delivers serious power, and that comes at a cost. This isn’t a family hauler purchased for maximum efficiency; it’s a prestige vehicle, and fuel economy is simply a secondary consideration for its target buyer.

City and highway performance

The EPA estimates the GLE580 at 16 MPG in the city and 21 MPG on the highway. Considering the vehicle’s weight and the V8’s output, these figures are reasonable, if not exactly thrifty. The nine-speed automatic transmission helps optimize fuel consumption at higher speeds, contributing to the slightly better highway figure. Stop-and-go city driving, however, is where the V8’s thirst becomes most apparent. The mild-hybrid system offers some assistance with start-stop functionality and electric assist, but its primary purpose is to smooth out power delivery rather than dramatically improve fuel economy.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2022 Mercedes-Benz GLE580 4matic at $3,200. This figure is based on driving 15,000 miles per year, with 55% of those miles driven in the city and 45% on the highway, using the national average fuel price at the time of calculation (typically regular unleaded although the GLE580 prefers premium). It’s a useful benchmark for comparing running costs, but remember that your actual fuel expenses may vary significantly depending on your driving habits and local fuel prices. Individuals who primarily drive in the city or who have a heavy foot will likely exceed this estimate.

Real-world expectations

While the EPA figures provide a standardized benchmark, real-world fuel economy will fluctuate based on driving style, traffic conditions, and even the season. Expect to see figures close to the EPA estimates during relaxed highway cruising, but potentially lower numbers during aggressive driving or in heavy traffic. Owners who live in hilly areas or frequently tow will also experience reduced fuel economy. Many drivers report figures within a few MPG of the EPA estimates, but achieving those numbers requires conscious effort and a light foot on the accelerator.

How it compares

The GLE580’s fuel economy places it squarely in line with other V8-powered luxury SUVs. For instance, the BMW X5 M50i, with its 4.4L V8, achieves similar EPA estimates of 16 MPG city and 22 MPG highway. The Land Rover Range Rover P530, boasting a more powerful V8, sees figures around 16 MPG city and 21 MPG highway. Going with a smaller engine in the GLE lineup, like the GLE450’s inline-six, can improve fuel economy to an estimated 21 MPG combined, but sacrifices the V8’s effortless power delivery. This comparison matters because buyers often cross-shop these high-end SUVs, weighing performance, luxury, and running costs.

Tips to maximize efficiency

While the GLE580 isn’t designed for Prius-like fuel economy, there are steps you can take to improve its efficiency. Avoid aggressive acceleration and hard braking as these actions quickly deplete fuel. The V8 responds well to smooth, deliberate inputs, so focus on maintaining a consistent speed and anticipating traffic flow.

Take advantage of the GLE580’s driving modes. Selecting “Comfort” or “Eco” mode will adjust the engine and transmission settings to prioritize fuel efficiency over outright performance. These modes typically soften throttle response and encourage earlier upshifts, helping to conserve fuel.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, which reduces fuel economy. Check your tire pressure regularly and inflate them to the recommended levels, which can be found on a sticker inside the driver’s side doorjamb or in the owner’s manual.

Reduce unnecessary weight in the vehicle. Carrying extra cargo increases the amount of energy required to accelerate and maintain speed. Remove any items you don’t need, especially heavy objects, to improve fuel efficiency. Consider exploring all Mercedes Benz fuel economy data to see how other models prioritize efficiency.

Regular maintenance is critical for optimal fuel economy. Ensure your engine is properly tuned and that filters are clean. Clogged air filters and worn spark plugs can negatively impact fuel efficiency. Check the GLE580 MPG across all years to see trends in its fuel consumption.