25 MPG combined isn’t going to win any hypermiling awards, but for the 2023 Mercedes-Benz C300 4matic Coupe, it’s a reasonable trade-off for the style and performance this two-door offers. This isn’t a vehicle bought for ultimate frugality; it’s purchased for the statement it makes and the driving experience it delivers, with fuel economy playing a secondary, but still relevant, role for its affluent target demographic.

City and highway performance

The EPA estimates the C300 Coupe 4matic at 22 MPG in the city and 31 MPG on the highway. The city figure reflects the stop-and-go conditions where the 2.0L turbocharged four-cylinder engine works harder, and the automatic transmission shifts more frequently. On the highway, the C300 Coupe settles into a more relaxed pace, allowing it to achieve considerably better fuel efficiency, closer to its potential.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2023 Mercedes-Benz C300 4matic Coupe at $2,300. This figure is calculated based on driving 15,000 miles per year and using national average fuel prices. Of course, your actual fuel costs may vary significantly depending on your driving habits, the type of fuel you use (premium is recommended), and local fuel prices. Buyers should realistically assess their annual mileage and spending habits to project their actual expenditure. If you drive less than 15,000 miles annually, you can expect to spend less than this figure, and if you drive significantly more, your costs will increase correspondingly. See all Mercedes Benz fuel economy data.

Real-world expectations

Keep in mind that the EPA estimates are based on standardized testing. In the real world, aggressive driving, frequent short trips, and heavy traffic can all reduce your fuel economy below the official figures. Careful driving, consistent highway cruising, and proper maintenance can help you achieve or even exceed the EPA ratings. The C300 Coupe’s fuel consumption is particularly sensitive to driving style. A lead foot will quickly diminish your mileage, while a more conservative approach can yield surprisingly good results. The 4matic all-wheel-drive system, while enhancing grip and stability, also adds some weight and drivetrain friction, which can slightly decrease fuel efficiency compared to a rear-wheel-drive model.

How it compares

The C300 Coupe occupies a niche between outright sports cars and more practical sedans. Its closest competitors include the BMW 430i xDrive Coupe, which achieves a similar 27 MPG combined. The Audi A5 Coupe offers around 28 MPG combined in its quattro configuration. While these MPG figures are on par, each vehicle offers a distinct driving experience. A buyer choosing the Mercedes-Benz is typically prioritizing luxury, style, and a well-rounded driving experience over squeezing out every last drop of fuel. For example, a Lexus RC 300 AWD offers similar fuel economy, but has distinctly different interior and exterior aesthetics.

Tips to maximize efficiency

Take advantage of the C300’s drive mode selector. Using “Eco” mode can significantly improve fuel economy by optimizing the engine and transmission for efficiency. This setting softens throttle response and encourages earlier upshifts, helping you conserve fuel without sacrificing too much performance for daily driving tasks.

Regular maintenance is key to optimizing fuel economy. Ensure that your tires are properly inflated, as low tire pressure increases rolling resistance and reduces MPG. Also, keep up with scheduled maintenance, such as oil changes and air filter replacements, to keep the engine running efficiently. Use of the recommended premium fuel will also optimize combustion and fuel economy.

Minimize unnecessary weight in the vehicle. Extra cargo adds weight, which requires the engine to work harder, thus consuming more fuel. Remove any items that you don’t need to carry regularly. This is especially relevant for a vehicle like the C300 Coupe, where cargo space is already limited.

Anticipate traffic flow and avoid unnecessary acceleration and braking. Smooth, consistent driving is more fuel-efficient than constantly speeding up and slowing down. This is particularly crucial in city driving, where stop-and-go traffic can severely impact fuel economy. Use cruise control on the highway to maintain a consistent speed and optimize fuel efficiency. See C300 MPG across all years.