25 MPG combined isn’t a number that will excite everyone. For the 2022 Mercedes-Benz C300 Coupe, however, it’s an accepted compromise. This C-Class variant isn’t bought for ultimate efficiency; it’s bought for style. The silhouette, the badge, and the perceived sense of aspiration outweigh outright frugality for the typical C300 Coupe buyer. They are willing to pay a premium at the pump for the prestige and driving experience, even if the performance is more “adequate” than “astonishing”.

City and highway performance

The EPA estimates of 22 MPG in the city and 31 MPG on the highway reflect the C300 Coupe’s characteristics under different driving conditions. The city figure suggests a fuel-sapping experience during stop-and-go traffic, hardly unusual. The highway rating hints at the benefits of the 9-speed automatic transmission and its ability to settle the engine into lower RPMs at cruising speeds. The C300 Coupe gets closest to its advertised potential on longer trips, where people looking for small fuel savings will engage cruise control.

Annual fuel cost

The EPA’s estimated annual fuel cost for the 2022 Mercedes-Benz C300 Coupe is $2,300. This figure is based on driving 15,000 miles per year, using fuel prices prevalent at the time of calculation. While national average fuel prices fluctuate, expect to spend around this amount annually if your driving habits mirror the EPA’s assumptions. Of course, drivers who frequently drive aggressively or primarily in the city can easily exceed this cost. The C300 buyer considering C300 MPG across all years needs to factor in their personal driving habits if budget is a concern.

Real-world expectations

Do not expect to consistently hit the EPA’s 31 MPG highway figure unless you are meticulously optimizing every journey. Real-world fuel economy often falls slightly short, influenced by factors such as driving style, traffic conditions, and even tire pressure. Expect something closer to 28-29 MPG on the open road during typical use. The 22 MPG city rating is more realistic, but aggressive acceleration can push it lower. Buyers need to be honest about their habits.

How it compares

Several competitors exist within the luxury coupe segment, each with varying fuel economy credentials. The BMW 430i Coupe, with its own 2.0L turbocharged engine, achieves a similar combined MPG of 28. The Audi A5 Coupe, also powered by a turbocharged four-cylinder, manages around 27 MPG combined. These small advantages are ultimately offset by personal brand preferences and styling choices. Buyers cross-shopping may also consider the Lexus RC 300, though its V6 engine delivers a lower combined MPG of 21. For those prioritizing efficiency over all else, the Acura Integra, though not a direct competitor in body style, offers a far more compelling 30/37/33 (city/hwy/combined) with comparable levels of luxury at roughly two-thirds the price of the C300. See all Mercedes Benz fuel economy data to compare.

Tips to maximize efficiency

Take advantage of the C300 Coupe’s selectable driving modes. “Eco” mode modifies the throttle response and shift patterns of the 9-speed automatic transmission to prioritize efficiency. It might dull performance slightly, but it can yield noticeable savings over time. For highway runs, experiment with “Comfort” mode that seeks a balance of performance and fuel consumption.

Regular maintenance impacts fuel economy. Ensure your tires are properly inflated to the recommended pressure, as underinflated tires increase rolling resistance and reduce MPG. Similarly, keep up with scheduled oil changes, as old or dirty oil can reduce engine efficiency. Simple maintenance tasks will keep MPG figures closer to expectations.

Minimize unnecessary weight inside the vehicle. Carrying extra cargo in the trunk or back seat adds weight, forcing the engine to work harder and consume more fuel. Remove any items you don’t need, especially during city driving, where the impact of extra weight is most noticeable. The difference can be surprising.

Avoid aggressive driving habits. Rapid acceleration and hard braking consume significant amounts of fuel. A smoother, more deliberate driving style can significantly improve your MPG. Think ahead, anticipate traffic flow, and maintain a consistent speed whenever possible. Consider that the next car is likely to brake.