24 MPG combined won’t win any hypermiling competitions, but for the 2017 Mercedes-Benz E300 4matic, it’s a reasonable compromise between luxury, performance, and all-weather security. Buyers choosing this sedan aren’t solely prioritizing efficiency; they value the prestige, technology, and driving experience that come with the Mercedes-Benz badge, while still needing a vehicle that won’t completely break the bank at the pump.

City and highway performance

The EPA estimates that the E300 4matic achieves 22 MPG in the city and 29 MPG on the highway. This discrepancy reflects the turbocharged 2.0L four-cylinder engine’s behavior under different driving conditions. Stop-and-go city driving, with frequent acceleration and braking, puts a greater strain on fuel consumption.

Open highway cruising at a steady speed allows the engine to operate more efficiently, aided by the smooth-shifting 9-speed automatic transmission. The 4matic all-wheel-drive system enhances traction and stability, but also slightly reduces fuel economy compared to a rear-wheel-drive model.

Annual fuel cost

According to the EPA, the estimated annual fuel cost for the 2017 Mercedes-Benz E300 4matic is $2,400. This figure is based on driving 15,000 miles per year, with a mix of city and highway driving conditions, using the national average fuel price for premium gasoline (as recommended for optimal performance in this engine). Remember that this is only an estimate, and your actual fuel costs may vary depending on your driving habits, the type of gasoline you use, and prevailing fuel prices in your area.

Before making a decision, you can review E300 MPG across all years to see how this figure compares.

Real-world expectations

EPA estimates provide a useful benchmark, but real-world fuel economy can often differ. Drivers performing mostly short trips, frequently accelerating aggressively, or consistently driving in heavy traffic will likely see figures below the EPA estimates. However, those who prioritize smooth acceleration, maintain consistent speeds, and drive predominantly on the highway may exceed the EPA’s numbers.

Factors like tire pressure, vehicle maintenance, and even the use of accessories like air conditioning can influence fuel consumption.

How it compares

The 2017 E300 4matic occupies a competitive space in the luxury sedan market. The BMW 530i xDrive, for example, also features a 2.0L turbocharged four-cylinder and all-wheel drive, achieving a similar EPA-estimated combined fuel economy of 27 MPG. The Audi A6 2.0T quattro, another key competitor, manages around 25 MPG combined. Models with larger engines, such as the E43 AMG with its powerful V6, see a significant drop in fuel economy, typically falling below 20 MPG combined. For buyers seeking all all Mercedes Benz fuel economy data, the E300 4matic balances fuel economy with performance and luxury.

Tips to maximize efficiency

Use the E300’s driving mode selector. Selecting “Eco” mode will optimize the engine and transmission settings for maximum fuel efficiency, often resulting in noticeably improved MPG, especially in city driving. This mode will reduce throttle response, so select it when relaxed driving is prioritized.

Avoid aggressive acceleration and braking. The E300’s turbocharged engine delivers ample power, allowing for smooth and effortless acceleration. Gentle acceleration and gradual braking improves fuel economy and contributes to a more comfortable and refined driving experience.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, which reduces fuel efficiency. Check your tire pressure regularly and maintain the recommended pressure listed on the driver’s side door jamb.

Minimize idling. Letting the engine idle for extended periods consumes fuel unnecessarily. If you anticipate stopping for more than a minute or two, turn off the engine.

Regular maintenance is important for fuel economy. Following the manufacturer’s recommended maintenance schedule, including oil changes, air filter replacements, and spark plug replacements, can help ensure that your E300 is running at peak efficiency.