24 MPG combined is a reasonable figure for the 2024 Mercedes-Benz GLE350, placing it in the middle of its class. It’s neither shockingly efficient nor embarrassingly thirsty, which is exactly where Mercedes-Benz intends it to be. The GLE350 isn’t purchased by those chasing every last tenth of a mile per gallon. It’s purchased by buyers who prioritize luxury, brand cachet, and a comfortable driving experience, and for them, 24 MPG is an acceptable compromise.

City and highway performance

The GLE350’s 2.0-liter turbocharged four-cylinder engine gets 21 MPG in the city. Stop-and-go traffic will always hurt fuel economy, but the GLE350’s smooth-shifting nine-speed automatic transmission helps reduce some of the losses.

On the open highway, the GLE350 achieves 28 MPG. The engine settles into its most efficient range here, allowing for relaxed cruising and decent fuel mileage on longer journeys. The long gearing of the nine-speed is a major factor here, keeping engine RPM low at highway speeds.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2024 Mercedes-Benz GLE350 at $2,400. This is based on driving 15,000 miles per year and using national average fuel prices. Real-world fuel costs will vary depending on individual driving habits, local fuel prices, and the type of fuel used. While the GLE350 doesn’t require premium fuel, some drivers report slightly improved performance and fuel economy when using it.

Real-world expectations

Official EPA estimates provide a useful baseline for comparison, but they rarely perfectly reflect real-world driving. A heavy foot, frequent short trips, and extensive idling can all significantly reduce observed fuel economy. On the other hand, careful driving habits, consistent highway cruising, and diligent maintenance can help you achieve figures closer to, or even exceeding, the EPA estimates. Owners of GLE350 models should also bear in mind that factors like tire pressure and the use of accessories like roof racks can impact efficiency.

How it compares

The GLE350’s fuel economy is competitive within its class. The BMW X5 sDrive40i, for example, achieves a slightly better combined MPG of 25, thanks to its mild-hybrid system, but it comes at a higher price point. The Audi Q7 45 TFSI matches the GLE350’s 24 MPG combined, while offering a similarly luxurious experience. The Lexus RX 350, known for its reliability, posts a nearly identical 25 MPG combined. Ultimately, the decision often comes down to brand preference and specific features, rather than a significant difference in fuel costs. For those prioritizing fuel efficiency above all else, the Volvo XC90 Recharge plug-in hybrid offers significantly better economy, but requires consistent charging to realize its full potential. Check GLE350 MPG across all years to compare this model to past years’ fuel economy figures, as well as see all Mercedes Benz fuel economy data.

Tips to maximize efficiency

Gentle acceleration and smooth braking are two of the most effective ways to improve fuel economy in the GLE350. Avoid aggressive driving habits, as the turbocharged engine will quickly consume more fuel when pushed hard. Anticipate traffic flow and maintain a steady pace whenever possible.

Ensure your tires are properly inflated to the recommended pressure, which is typically found on a sticker inside the driver’s side doorjamb. Underinflated tires increase rolling resistance, which reduces fuel efficiency. Check your tire pressures regularly, especially during temperature changes.

Minimize idling time. Idling consumes fuel without covering any distance. If you anticipate being stopped for more than a minute or two, turn off the engine. Modern vehicles are designed to restart quickly and efficiently, so there’s no need to let the engine run unnecessarily.

Consider using the GLE350’s ECO driving mode, if equipped. This mode typically adjusts throttle response and transmission shift points to prioritize fuel efficiency. While it may slightly reduce performance, it can contribute to noticeable fuel savings over time.

Regular maintenance is essential for optimal fuel economy. Ensure your engine is properly tuned, and that air and fuel filters are clean. A well-maintained engine runs more efficiently, maximizing fuel mileage.