22 MPG combined is the headline for the 2025 Mercedes-Benz GLE350 4MATIC. This number shows the brand’s commitment to balancing luxury and efficiency in its core mid-size SUV. This figure isn’t about setting any records. It’s about providing a satisfying ownership experience for a customer who prioritizes refinement, comfort, and advanced technology without making a significant sacrifice at the pump. This is a vehicle for professionals, established families, and those who value a commanding presence on the road. They understand that a 2.0L turbocharged engine, even with a 48-volt mild-hybrid assist, in an SUV weighing around 4,800 pounds, represents a an engineering achievement, not a concession to austerity. The GLE350 buyer wants a Mercedes-Benz, and they accept that this level of luxury and capability comes with a certain fuel economy profile, a profile that the 22 MPG combined defines.

City and highway performance

The EPA’s breakdown of 19 MPG in the city and 26 MPG on the highway for the 2025 GLE350 4MATIC tells a familiar story for vehicles equipped with mild-hybrid systems. The 48-volt integrated starter generator (ISG) contributes to the better-than-expected city mileage. It smooths out stop/start transitions, offers a subtle electric boost off the line, and recaptures energy during deceleration, all of which directly benefit efficiency in urban driving. This is precisely why the GLE350 feels so composed and effortless in city driving; the powertrain isn’t constantly straining. On the open road, the 2.0L four-cylinder, paired with the smooth 9-speed automatic transmission, settles into a relaxed cadence. At highway speeds, the engine is barely audible, the cabin remains quiet and insulated, and the ability to maintain momentum without constant downshifts contributes significantly to the 26 MPG highway rating. Mercedes engineers have tuned this powertrain for a smooth, confident delivery of power that perfectly suits its luxury mission. It’s highway cruising, making long journeys efficient for a vehicle of this stature.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2025 Mercedes-Benz GLE350 4MATIC at $2,650. This figure is derived from a standard calculation method, assuming 15,000 miles of driving per year with a mix of 55% city and 45% highway travel, and using national average fuel prices. For the GLE350 owner, this annual cost is a comfortable line item in their budget, representing a manageable expense for a premium vehicle. It underscores that while fuel efficiency is a consideration, it’s not the primary driver for this purchase. Instead, it’s a reassurance that their luxury SUV isn’t excessively demanding at the pump. This $2,650 reflects a sensible balance, allowing owners to enjoy the opulence and capability of their Mercedes-Benz without feeling penalized by exorbitant running costs.

Real-world expectations

Anticipate real-world fuel economy for the GLE350 4MATIC to hover very close to its EPA estimates. Drivers who prioritize a gentle, measured driving style will often meet or even slightly exceed the combined 22 MPG. The 48-volt mild-hybrid system shines in stop-and-go traffic, often pushing city figures closer to the EPA’s 19 MPG mark than some non-hybrid counterparts. Conversely, those with a heavier right foot, or who frequently engage in spirited driving with more aggressive acceleration, will predictably see figures dip towards the lower end of the 19 MPG city range. Sustained highway driving, particularly at consistent speeds and reasonable loads, should regularly deliver 24-26 MPG, reinforcing its excellent long-distance comfort. Expect the 9-speed transmission to perform best when left to its own devices, shifting to optimize efficiency without drawing attention to itself. For more information on GLE350 MPG across all years, consult our fuel economy data.

How it compares

The 2025 GLE350 4MATIC slots into the competitive mid-size luxury SUV segment, and its 2.0L engine delivers a fuel economy profile that is right in line with its direct rivals. Consider the BMW X5 sDrive40i (RWD) with its 3.0L inline-six and mild-hybrid system, which achieves 23 MPG combined (21 city/26 highway). While the X5 offers slightly better combined figures, the GLE350’s 4MATIC all-wheel drive is standard, a feature that typically reduces efficiency. The 2024 Audi Q7 45 TFSI, using a 2.0L turbo-four and standard quattro all-wheel drive, earns 22 MPG combined (19 city/25 highway), virtually identical to the GLE350. Cadillac’s XT5 Luxury with its 2.0L turbo-four and AWD comes in at 23 MPG combined (21 city/27 highway), showcasing a slight edge, but often without the same level of interior refinement or brand cachet that attracts the Mercedes-Benz buyer. For the individual looking at all Mercedes Benz fuel economy data, the GLE350’s numbers demonstrate that it effectively competes on efficiency while still delivering the expected Mercedes-Benz experience.

Tips to maximize efficiency

Use the GLE350’s “Eco” drive mode for optimizing fuel consumption. This setting smooths throttle response, encourages earlier upshifts, and allows for more aggressive coasting with the mild-hybrid system, maximizing the benefits of its integrated starter generator, especially in urban environments.

Maintain consistent tire pressure at the manufacturer’s recommended levels. Properly inflated tires reduce rolling resistance, a simple yet highly effective way to ensure the 2.0L engine isn’t working any harder than necessary to move the GLE350’s substantial mass.

Smooth acceleration and gentle braking are important for this powertrain. Avoid sudden bursts of speed and hard stops, as these actions waste fuel and prevent the mild-hybrid system from efficiently regenerating energy during deceleration.

When approaching traffic lights or slow-moving traffic, lift off the accelerator earlier. This allows the GLE350 to coast and recover kinetic energy, recharging the 48-volt battery and reducing the workload on the gasoline engine, particularly beneficial before the engine even has a chance to engage its automatic stop/start.

Minimize unnecessary weight in the vehicle and resist carrying heavy roof racks or cargo carriers when not in use. The added aerodynamic drag and mass directly impact the 2.0L engine’s efficiency, especially on highway journeys.