23 MPG combined might seem unremarkable, but it’s the cost for the 2017 Mercedes-Benz AMG C43 4matic Coupe. This isn’t just a commuter car, it’s a stylish, high-performance machine that delivers a thrilling driving experience. C43 Coupe owners willingly trade fuel efficiency for a potent twin-turbo V6 engine, a reliable all-wheel-drive system, and the AMG badge.

City and highway performance

The EPA estimates the C43 Coupe achieves 20 MPG in the city and 28 MPG on the highway. These figures reflect the engine’s eagerness to deliver power. In urban environments, stop-and-go traffic keeps the engine from settling into its most efficient range, leading to the lower city MPG. However, the 9-speed automatic transmission helps keep the engine in its sweet spot on the highway, allowing for respectable fuel economy during long cruises where consistent speed delivers better MPG.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2017 Mercedes-Benz AMG C43 Coupe at $2,500. This calculation is based on driving 15,000 miles per year and using the national average fuel price, a great average to use when considering fuel costs of a performance vehicle. Real-world costs could vary based on driving habits and local fuel prices. Buyers can expect to pay around $2,500 in normal conditions.

Real-world expectations

While the EPA provides a standardized estimate, real-world MPG for the C43 Coupe often varies. Drivers who frequently push the engine’s 362 horsepower and drive spiritedly should expect figures closer to the city rating, potentially even lower. But, those who adopt a more relaxed driving style and prioritize smooth acceleration may see numbers closer to or even slightly above the highway estimate.

The C43’s driving mode selector also plays a role. Selecting “Comfort” mode will tame throttle response and shift patterns, favoring fuel efficiency over outright performance. “Sport+” maximizes performance at the expense of MPG.

How it compares

Compared to its direct competitors, the C43’s fuel economy is similar to others in its class. The BMW 440i xDrive Coupe, with its turbocharged inline-six, delivers an EPA-estimated 25 MPG combined. The Audi S5 Coupe, boasting a supercharged V6 and standard all-wheel drive, manages around 24 MPG combined. The differences are insignificant for buyers in this segment. These numbers demonstrate that the C43 isn’t wildly out of line with other performance-oriented coupes, showing that MPG is not the biggest concern of these sport vehicle shoppers. For context, you can view all Mercedes Benz fuel economy data on our site. Or, if you want to compare other models with the AMG badge, explore AMG MPG across all years to compare.

Tips to maximize efficiency

Use the driving modes. The C43’s Dynamic Select system offers a range of driving modes that influence throttle response, shift points, and steering feel. Selecting “Comfort” mode softens the car’s responses, promoting smoother acceleration and more fuel-efficient gear changes. This mode can noticeably improve MPG when performance is not the priority.

Practice smooth acceleration and braking. Avoid abrupt pedal movements, as these consume more fuel. Gentle acceleration and progressive braking minimize energy waste, improving efficiency, especially in city driving. Anticipating traffic flow and coasting towards stops further reduces fuel consumption.

Maintain proper tire inflation. Underinflated tires increase rolling resistance, forcing the engine to work harder and reduce fuel economy. Check your tires regularly and inflate them to the recommended pressure listed on the driver’s side doorjamb. Optimal tire pressure enhances fuel efficiency, improves handling, and extends tire life.

Minimize aerodynamic drag. Remove unnecessary items from the roof rack or cargo carriers, as these create drag and reduce MPG. Leaving windows open at higher speeds can decrease fuel economy compared to using the air conditioning. Streamlining the car’s profile improves efficiency, particularly on the highway.

Combine trips and errands. Cold starts consume more fuel than warm starts. Consolidating multiple short trips into a single longer journey allows the engine to reach its optimal operating temperature, improving fuel efficiency. Planning your route in advance and avoiding peak traffic hours can also save fuel.