22 MPG combined is an acceptable fuel economy figure for the 2023 Mercedes-Benz GLE450 4matic. This mid-size luxury SUV isn’t expected to get hybrid-like economy. Buyers want a spacious, impeccably built vehicle with a smooth inline-six engine, and are willing to pay for that experience. The GLE450 buyer prioritizes a refined driving experience, advanced technology, and the Mercedes-Benz brand over ultimate fuel efficiency, but still wants a reasonable number.

City and highway performance

The EPA estimates the GLE450 4matic will achieve 20 MPG in city driving and 25 MPG on the highway. These figures are realistic and show the balance between performance and efficiency that Mercedes-Benz has worked to achieve. The 3.0L inline-six engine, aided by a mild-hybrid system, provides ample power for acceleration on city streets and relaxed cruising on the highway. The nine-speed automatic transmission ensures the engine operates in its optimal range, improving both performance and fuel economy. Stop-and-go traffic will lower the MPG, but the mild-hybrid system recuperates energy during braking to help mitigate this.

Annual fuel cost

The EPA says the average annual fuel cost for the 2023 Mercedes-Benz GLE450 4matic is approximately $2,650. This is based on driving 15,000 miles per year and using national average fuel prices. This is an estimate, as individual fuel costs can vary depending on driving habits, local fuel prices, and the type of fuel used. While the GLE450 doesn’t require premium fuel, it is recommended for optimal performance. This cost is important when budgeting for ownership of a GLE450. To compare GLE450 MPG across model years, see the GLE450 MPG across all years page.

Real-world expectations

EPA estimates provide a baseline but real-world fuel economy can vary. Factors like driving style, traffic, road grades, and tire pressure impact MPG. Expect figures close to the EPA’s estimates under normal driving conditions. Aggressive acceleration and hard braking will reduce fuel economy. Consistent highway driving at steady speeds will likely yield results closer to, or above, the EPA’s 25 MPG highway estimate. A mindful driving technique will be the biggest factor in determining fuel costs.

How it compares

The GLE450’s fuel economy is competitive within its class, but not the leader. The BMW X5 xDrive40i, with its similar inline-six engine, achieves roughly 21 MPG combined, while newer Volvo XC90 B6 models can achieve 23 MPG combined. The Lexus RX 350h, a hybrid SUV, surpasses it with 36 MPG combined but has less power and different driving dynamics. Buyers prioritizing less gas may find the Lexus a good alternative. Those who value the GLE450’s strong engine and luxurious interior may think the slight MPG difference is a worthwhile trade-off. To examine all Mercedes Benz fuel economy data, you can compare various models there.

Tips to maximize efficiency

Use the GLE450’s ECO drive mode. This setting optimizes engine and transmission settings for fuel efficiency, even if it slightly reduces responsiveness. It’s good for commuting and highway cruising when strong acceleration isn’t needed.

Keep tires properly inflated. Underinflated tires increase rolling resistance, which hurts fuel economy. Check tire pressures regularly and inflate them to the recommended levels, found on the sticker on the driver’s side doorjamb.

Anticipate traffic flow and avoid unnecessary acceleration and braking. Smooth driving is the key to fuel economy. Look ahead and try to maintain a steady speed, minimizing the need for abrupt stops and starts. This reduces the amount of fuel used to accelerate from a complete stop.

Limit the use of air conditioning. While air conditioning is good for comfort, it puts strain on the engine and reduces fuel economy. Use it carefully, opening the windows or sunroof when appropriate to reduce system load.

Keep your GLE450 maintained. Regular oil changes, air filter replacements, and routine maintenance ensure the engine runs efficiently. A well-maintained engine consumes less fuel and operates more smoothly.