The 2020 Mercedes-Benz E450 Coupe gets 23 MPG combined, which isn’t going to win any hypermiling contests, but it’s a reasonable trade-off for the performance and luxury this car delivers. This isn’t a vehicle for penny-pinchers; it’s for those who value style, effortless power, and advanced technology, and who are willing to pay a premium at the pump to get it.

City and highway performance

The E450 Coupe’s EPA estimates peg city driving at 20 MPG and highway cruising at 28 MPG. The city figure reflects the stop-and-go traffic, where the car’s weight and powerful 3.0L turbocharged engine can take their toll. On the open road, the 9-speed automatic transmission shines, allowing the engine to settle into a relaxed cruise. This maximizes efficiency without sacrificing responsiveness when you need to pass. These EPA estimates are realistic under normal driving conditions, but aggressive acceleration and prolonged high-speed driving will certainly impact those numbers.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2020 Mercedes-Benz E450 Coupe at $2,500. This figure is based on driving 15,000 miles per year and using national average fuel prices. Individual fuel costs will vary depending on driving habits, location, and fuel prices in your area. It’s a useful benchmark for comparison, but should not be taken as a guaranteed expense. Owners contemplating this car should be fully aware before buying that their yearly fuel bill will be at least $2,500.

Real-world expectations

While the EPA figures provide a guideline, real-world fuel economy can vary. Drivers who frequently engage in spirited driving, using the engine’s full potential, may see figures closer to the city MPG, even on mixed routes. However, those who prioritize smooth, consistent driving on the highway might exceed the 28 MPG estimate. The car’s trip computer provides real-time and average fuel consumption data, allowing drivers to monitor their efficiency and adjust their driving style accordingly. The 4MATIC all-wheel drive system, while enhancing traction, can slightly decrease fuel economy compared to the standard rear-wheel drive model.

How it compares

The E450 Coupe is in an area where luxury and performance take precedence over outright fuel efficiency. A BMW 440i Coupe, with its similar focus on driving engagement, achieves around 26 MPG combined. The Audi A5 Coupe manages about 27 MPG with its 2.0-liter turbocharged engine, a trade-off of power for efficiency. Even the Lexus RC 350, known for its reliability, lands near the same 23 MPG combined rating. These competitors all appeal to a similar customer base, where MPG is a consideration, but not the primary deciding factor. Anyone looking into all Mercedes Benz fuel economy data will see that 23 MPG aligns with the brand’s performance-oriented models. Those interested in the E450 MPG across all years will quickly see that this is a consistent trait.

Tips to maximize efficiency

Use the E450 Coupe’s driving modes. The “Comfort” mode prioritizes fuel efficiency by optimizing throttle response and transmission shift points. Switching to “Sport” or “Sport+” modes will deliver quicker acceleration, but at the expense of fuel economy.

Maintain a smooth and consistent driving style. Avoid hard acceleration and braking, as these actions consume significantly more fuel. Anticipate traffic flow and use the car’s momentum to your advantage.

Ensure proper tire inflation. Under-inflated tires increase rolling resistance, which leads to reduced MPG. Check your tire pressure regularly and inflate them to the recommended level, found on the driver’s side doorjamb.

Reduce unnecessary weight. Carrying excessive cargo in the trunk or rear seats adds weight to the vehicle, impacting fuel efficiency. Remove any items that are not essential for your journey.

Consider using cruise control on the highway. Maintaining a constant speed can help optimize fuel economy on long journeys. Remember to remain vigilant and adjust your speed as needed to maintain a safe following distance.