The 2022 Mercedes-Benz E450 Convertible gets an EPA-estimated 25 MPG combined. This figure might not scare away drivers looking for open-air motoring, but won’t be a main selling point for those prioritizing lower fuel costs. This isn’t a car bought for practical reasons. It’s a statement of personal enjoyment, built for drivers who value luxurious comfort and a refined driving experience. The E450 Convertible’s fuel consumption is simply what you pay for such a machine.

City and highway performance

The E450 Convertible achieves 22 MPG in city driving and 29 MPG on the highway. The city MPG reflects stop-and-go traffic, where the car’s 3.0L turbocharged six-cylinder engine and smooth-shifting nine-speed automatic transmission work harder, which consumes more fuel. The highway rating showcases the engine’s efficiency at sustained speeds, helped by the 9-speed transmission keeping the engine in its optimal range, contributing to the respectable MPG on longer journeys. E450 MPG across all years shows how this powertrain fares across generations.

Annual Fuel Cost

The EPA estimates an annual fuel cost of $2,300 for the 2022 Mercedes-Benz E450 Convertible. This is based on driving 15,000 miles per year and using the national average fuel price at the time of calculation. Real-world costs will vary depending on individual driving habits and fuel prices, but it gives buyers a relative figure to compare to other alternatives.

Real-World Expectations

EPA ratings provide a standardized benchmark, but real-world fuel economy will change based on driving style, traffic, and weather. Drivers who accelerate quickly or brake hard are likely to see figures lower than the official MPG. However, drivers who prioritize smooth, consistent driving and use the car’s driving modes with fuel efficiency in mind may get closer to, or even exceed, the EPA estimates.

Premium fuel is required for optimal performance.

How It Compares

Competitors in the luxury convertible segment offer a range of fuel economy figures. The BMW 440i Convertible, for example, is rated at 26 MPG combined. The Audi S5 Cabriolet offers very similar economy to the E450. These differences might sway some buyers, but the decision typically comes down to preferences in styling, features, and driving experience. You can explore all Mercedes Benz fuel economy data. When compared to larger SUVs or performance-oriented vehicles, the E450 Convertible’s fuel economy is far better. For those seeking optimal fuel mileage, a hybrid or full-electric vehicle is a better choice, though it’d mean no open-air enjoyment.

Tips to Maximize Efficiency

Take advantage of the car’s driving modes. The E450 Convertible typically offers “Comfort,” “Sport,” “Eco,” and “Individual” modes. Selecting “Eco” mode optimizes the engine and transmission for fuel efficiency, resulting in savings, especially on longer drives.

Avoid aggressive acceleration and braking. The E450’s 3.0L turbocharged engine delivers plenty of power on demand, but frequent bursts of acceleration and hard braking can reduce fuel economy. Prioritize smooth, gradual acceleration and anticipate traffic to minimize the need for sudden stops.

Keep your tires properly inflated. Underinflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel. Check your tire pressure regularly and inflate them to the recommended level indicated on the door jamb or in the owner’s manual.

Minimize unnecessary weight. Carrying extra cargo adds weight, which impacts fuel economy. Remove any unnecessary items from the trunk and passenger compartment to reduce the burden on the engine.