25 MPG combined isn’t going to set the world on fire, but it’s a perfectly acceptable figure for the 2018 Mercedes-Benz E300 2.0L. This isn’t a sports car; it’s a comfortable sedan designed for executives, professionals, and anyone who appreciates a refined driving experience. Fuel economy, while important, is secondary to luxury, technology, and a smooth, quiet ride.

City and highway performance

The EPA estimates for the 2018 E300 break down to 22 MPG in the city and 30 MPG on the highway. The city figure reflects stop-and-go traffic, where the E300’s 2.0L turbocharged four-cylinder engine needs to work harder.

The highway number is more impressive. The slick-shifting 9-speed automatic transmission allows the engine to cruise at lower RPMs, maximizing efficiency. This makes the E300 a solid choice for those who regularly embark on longer commutes or road trips, where that 30 MPG figure will significantly reduce fuel stops.

Annual fuel cost

The EPA estimates that the annual fuel cost for the 2018 Mercedes-Benz E300 is $2,300. This figure is calculated based on driving 15,000 miles per year, using the national average fuel price at the time of calculation. Of course, your actual fuel costs will vary depending on your driving habits, local gas prices, and the type of fuel you use.

However, $2,300 provides a useful benchmark for comparing the E300’s fuel expenses with those of other vehicles in its class.

Real-world expectations

While the EPA figures provide a standardized measure, real-world fuel economy can vary. Drivers with a heavier foot or those who frequently drive in congested areas may see figures closer to the city estimate, or even slightly below. Conversely, those who primarily use the E300 for relaxed highway cruising can realistically expect to match or even exceed the 30 MPG highway rating. The key is understanding how your individual driving style and conditions impact fuel consumption. Explore E300 MPG across all years to see how different model years stack up.

How it compares

The E300’s fuel economy is generally competitive within its segment. For example, the BMW 530i, another popular luxury sedan, achieves a comparable 24 MPG combined. Some might cross-shop versus Lexus, where the ES 350 delivers around 26 MPG combined. In the end, the differences are usually small, and purchase decisions are often driven by brand preference, features, and overall driving experience. If fuel efficiency is a top priority, the hybrid versions of these sedans offer significantly better numbers, but come at a premium.

Tips to maximize efficiency

Take advantage of the E300’s driving modes. Selecting “Eco” mode will optimize the transmission and throttle response for maximum fuel efficiency, sacrificing some performance in the process. It’s perfect for everyday driving where outright acceleration isn’t necessary.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, forcing the engine to work harder and reducing fuel economy. Check your tire pressure regularly and inflate them to the recommended levels, typically found on a sticker inside the driver’s side door.

Avoid aggressive driving habits. Rapid acceleration and hard braking significantly decrease fuel economy. Try to anticipate traffic flow and maintain a smooth, consistent speed whenever possible. Gradual acceleration is key to minimizing fuel consumption.

Keep up with regular maintenance. A well-maintained engine runs more efficiently. Ensure that your E300 receives regular tune-ups, oil changes, and air filter replacements according to the manufacturer’s recommendations. This will help optimize performance and fuel economy over the long term.

Minimize unnecessary weight. Carrying extra weight in your vehicle reduces fuel economy. Remove any items from the trunk or back seat that you don’t need on a regular basis. Even small amounts of extra weight can add up over time, impacting your mileage. Dig deeper into all Mercedes Benz fuel economy data.