The 2021 Mercedes-Benz AMG C43 4matic Coupe gets 22 MPG combined. Nobody buys this car for its fuel efficiency. They buy it for the snarling exhaust note, the responsive handling, and the AMG badge. The fuel bill is part of the ownership experience, accepted for performance.

City and highway performance

The official EPA estimates put the C43 Coupe at 19 MPG in the city and 27 MPG on the highway. These figures reflect the driving cycle used by the EPA, which simulates typical urban and freeway driving. The city MPG indicates that frequent stop-and-go traffic will hurt fuel economy, unsurprisingly given the car’s performance tuning. The highway MPG is good, suggesting that longer road trips are possible without constant fuel stops. However, aggressive driving, even on the highway, will quickly reduce that 27 MPG figure.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2021 Mercedes-Benz AMG C43 4matic Coupe at $2,650. This figure is based on driving 15,000 miles per year and using national average fuel prices. This is just an estimate, and your actual fuel costs will vary depending on your driving habits, the type of fuel you use, and local fuel prices. Drivers with a heavy foot or those who primarily drive in congested city environments should anticipate spending more than this figure. This high annual fuel cost is the price of owning a high performance machine, although there may be lower cost options when viewing all Mercedes Benz fuel economy data.

Real-world expectations

While the EPA provides a standardized test, real-world fuel economy often differs. Expect a broader range of MPG depending on your typical driving style. Those who frequently use the C43’s sport modes will see numbers closer to the city estimate, perhaps even lower. On the other hand, drivers who prioritize smooth acceleration and use the car’s efficiency-enhancing features might achieve figures closer to, or even slightly above, the highway estimate on longer trips. The key is moderation and awareness of driving habits.

How it compares

Compared to its rivals, the AMG C43 Coupe’s fuel economy is normal for its class. The BMW M440i xDrive Coupe, another competitor, achieves a slightly better 25 MPG combined. Audi’s S5 Coupe is rated at 24 MPG combined, giving the C43 slightly less good fuel economy. These small differences rarely sway purchasing decisions in this segment. Buyers are more concerned with performance, handling, and brand image. The importance of these MPG differences really depend on how you view the AMG MPG across all years.

Tips to maximize efficiency

One way to improve fuel economy in your AMG C43 is to resist aggressive acceleration. The 3.0L V6 is a potent engine, but every hard launch extracts a penalty. Smooth acceleration will make a difference.

Use the car’s drive modes. Selecting the “Comfort” or “Eco” mode will remap the throttle response and shift points to prioritize fuel efficiency. These modes may dampen the car’s sporty character but can be useful for daily commuting or long highway drives.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, which reduces fuel economy. Check your tire pressure regularly and inflate them to the recommended specifications, typically found on a sticker inside the driver’s side doorjamb.

Minimize idling time. Letting the car idle consumes fuel. If you know you’ll be stopped for more than a minute or two, it’s more efficient to turn off the engine. The AMG C43 has a starter system so stop-start technology won’t hurt it too bad.

Consider using cruise control on the highway. Maintaining a consistent speed can help fuel efficiency, especially on long stretches of open road. Be mindful of traffic conditions and disengage cruise control when necessary for safety.