22 MPG combined won’t excite everyone, but it’s a reasonable compromise for the 2023 Mercedes-Benz GLE350 with its 2.0L turbocharged four-cylinder engine. This is the entry-level GLE, a luxury SUV that prioritizes comfort, technology, and brand prestige over maximum fuel efficiency. The GLE350 buyer likely values a prestigious badge, a well-appointed cabin, and a smooth driving experience, accepting moderate fuel economy in return.

City and highway performance

The EPA estimates the GLE350 achieves 20 MPG in the city and 25 MPG on the highway. The city figure reflects the frequent stops and starts of urban driving, where the four-cylinder engine works harder to accelerate the GLE’s weight. The highway MPG is more appealing, showing the engine’s ability to cruise efficiently at steady speeds, helped by the smooth-shifting 9-speed automatic transmission. This gearbox keeps the engine at its most efficient for longer trips. Overall, the GLE350’s fuel economy is adequate, and you will find GLE350 MPG across all years to be fairly consistent.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2023 Mercedes-Benz GLE350 is $2,650. This is based on driving 15,000 miles per year and using national average fuel prices. Remember that your actual fuel costs will change depending on your driving habits, city versus highway driving, and changes in fuel prices. Expect to spend more if you mainly drive in the city or accelerate quickly, and those who drive more highway miles could see a lower annual cost.

Real-world expectations

EPA estimates provide a benchmark, but real-world fuel economy often varies. If you drive aggressively or spend a lot of time in heavy traffic, expect to see figures slightly below the EPA’s 22 MPG combined. You can achieve the EPA estimates with careful driving habits and frequent highway driving. Drivers report a range of 19-24 MPG in mixed driving. Colder weather can also reduce fuel economy because the engine needs more energy to maintain optimal running conditions.

How it compares

The GLE350’s fuel economy is average compared to its competitors. The BMW X5 sDrive40i, with its inline-six engine, achieves a slightly better 23 MPG combined. The Acura MDX, a less premium vehicle, matches the GLE350’s 22 MPG. The Lexus RX 350 also delivers 22 MPG combined, but offers a hybrid variant with much better fuel economy. The Volvo XC90 B5, with its turbocharged and supercharged four-cylinder and mild hybrid system, gets 25 MPG combined. These comparisons are important because they show those seeking better MPG have options, but with tradeoffs in price, performance, or brand image. If less gas is a priority, looking at all Mercedes Benz fuel economy data, you’ll see that the GLE isn’t the best option.

Tips to maximize efficiency

The GLE350’s 2.0L engine performs best with smooth acceleration. Avoid quick starts and aggressive use of the accelerator, because these actions make the turbocharger work harder, using more fuel. Gradual acceleration allows the engine to work more efficiently, especially in city driving. Gentle use of the accelerator can significantly improve your MPG.

The GLE350 has drive modes, including “Eco” mode. Use this mode when you can; it adjusts the engine and transmission for maximum fuel efficiency. Eco mode often softens how the accelerator responds and adjusts when the transmission shifts to keep the engine operating most efficiently, which is ideal for highway cruising and less demanding city driving.

Make sure your GLE350’s tires are inflated to the manufacturer’s specifications. Underinflated tires increase rolling resistance, which reduces fuel economy. Check your tire pressure regularly, especially during seasonal temperature changes, to maintain optimal efficiency. Also consider using low rolling resistance tires when it’s time for a replacement.

Minimize idling. Turn off the engine if you expect to be stopped for more than a minute. Excessive idling uses fuel without going anywhere. Modern engines restart quickly and efficiently, so there’s no need to let the engine run unnecessarily while waiting in a parking lot or at a traffic stop.

Service your GLE350 according to the recommended maintenance schedule. Regular maintenance, including oil changes, air filter replacements, and spark plug replacements, ensures the engine runs optimally and efficiently. A well-maintained engine uses less fuel and performs better.