25 MPG combined won’t shatter any fuel efficiency records, but it’s an acceptable figure for the 2019 Mercedes-Benz C300 Coupe. Buyers drawn to this sleek two-door prioritize style and the subtle prestige of the Mercedes badge over outright frugality. They want a car that looks good pulling up to the restaurant or office, and they’re willing to pay a premium, not just for the car itself, but also at the pump.

City and highway performance

The C300 Coupe’s EPA estimates break down to 22 MPG in the city and 31 MPG on the highway. That city figure reflects the realities of stop-and-go traffic, where the engine works harder and spends more time idling. The 31 MPG highway rating demonstrates the benefit of the car’s 9-speed automatic transmission, which allows the engine to cruise at lower RPMs at higher speeds, conserving fuel. While these figures are decent, they’re not exceptional. The C300 Coupe isn’t designed to be a hypermiler; it’s built to deliver a refined driving experience with a focus on comfort and style.

Annual fuel cost

The EPA estimates an annual fuel cost of $2,300 for the 2019 Mercedes-Benz C300 Coupe. This figure is based on driving 15,000 miles per year, with a mix of city and highway driving, and using the national average fuel price at the time the EPA testing was conducted. It is a benchmark figure for comparing similar vehicles, but understand that your actual fuel cost will vary significantly based on your driving habits, the cost of fuel in your area, and how often you drive.

Real-world expectations

While the EPA provides a standardized testing procedure, real-world fuel economy can vary considerably. Factors such as driving style, traffic conditions, and even tire pressure can impact your MPG. A lead-footed driver who frequently accelerates hard and brakes late will likely see lower fuel economy than someone who drives more conservatively. Similarly, spending most of your time in congested city traffic will reduce your MPG compared to cruising on the open highway. Many C300 MPG across all years submissions on FuelEconomyHub.com confirm this; some owners report figures close to the EPA estimates, while others see slightly lower numbers.

How it compares

The C300 Coupe exists in a competitive segment. The BMW 430i Coupe, a direct rival, achieves roughly similar fuel economy. BMW’s turbocharged 2.0-liter in the 430i gets an EPA-rated 28 MPG combined, making it negligibly more efficient. Another competitor, the Audi A5 Coupe, also with a turbocharged 2.0-liter engine, delivers around 27 MPG combined, placing it in the same ballpark. The Lexus RC 300, while offering a more engaging exhaust note, only musters around 24 MPG combined with its base V6 engine, demonstrating that the C300 lands in an acceptable position when considering fuel economy versus its competitors. Buyers in this segment tend to weigh fuel economy against other factors like performance, styling, and brand perception, often prioritizing the latter.

Tips to maximize efficiency

Take advantage of the C300’s drive modes. Selecting “Eco” mode will remap the throttle response and shift points to prioritize fuel efficiency over performance. This can make a noticeable difference, especially in city driving, without sacrificing too much of the car’s responsiveness.

Ensure your tires are properly inflated. Underinflated tires create more rolling resistance, which forces the engine to work harder and reduces fuel economy. Check your tire pressure regularly and inflate them to the recommended level, which can be found on a sticker inside the driver’s side doorjamb or in the owner’s manual.

Minimize unnecessary weight. Carrying extra cargo in the trunk adds weight, which reduces fuel efficiency. Remove any items you don’t need to carry all the time. Even small amounts of weight can add up over time and impact your MPG.

Avoid aggressive driving habits. Rapid acceleration and hard braking consume more fuel. Drive smoothly and predictably, anticipating traffic flow and avoiding sudden maneuvers. This not only improves fuel economy but also enhances safety.

Consider that the 2019 C300 Coupe demands premium fuel. While using regular fuel won’t necessarily damage the engine, it can reduce performance and potentially decrease fuel economy as the engine management system compensates. Sticking to premium fuel ensures the engine operates at its optimal efficiency. For all Mercedes Benz fuel economy data, look at other models.