The 2018 Mercedes-Benz C300 gets 27 MPG combined. It’s not a hybrid made for saving gas, and it’s not a high-performance AMG model that focuses on speed. This C300 has a refined driving experience with decent fuel efficiency. This model, with its 2.0L turbocharged four-cylinder engine and nine-speed automatic transmission, hits a sweet spot in the luxury sedan market. The C300 buyer enjoys the prestige of the Mercedes-Benz brand, the comfortable interior, and a driving experience that’s engaging and relaxing. They accept some fuel consumption to be part of this luxury.

City and highway performance

The EPA estimates the 2018 C300 gets 24 MPG in the city and 33 MPG on the highway. The city figure reflects urban driving conditions, where frequent stops hurt fuel economy. The advanced nine-speed automatic helps keep the engine in the best operating range for efficiency. On the highway, at a steady speed, the C300 performs well. The 33 MPG highway figure shows it can provide comfortable and economical long drives. The engine’s torque allows for easy passing, and the smooth-shifting transmission supports a relaxed and fuel-efficient drive.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2018 Mercedes-Benz C300 at $2,150. This is based on driving 15,000 miles per year and using national average fuel prices. This is an estimate and your costs will change based on your driving, the fuel type, and where you live. Drivers who mainly drive in the city, or drive aggressively, will likely exceed this cost. However, drivers who spend more time on the highway and drive efficiently may spend less.

Real-world expectations

Getting the EPA’s 27 MPG combined rating requires driving efficiently. In mixed driving, expect between 24 and 30 MPG. Fast acceleration, hard braking, and idling will hurt fuel economy. Smooth acceleration, watching traffic, and using cruise control can help. The C300 has an ECO mode to optimize fuel use by changing the throttle and transmission. View all Mercedes Benz fuel economy data.

How it compares

The 2018 Mercedes-Benz C300’s fuel economy is normal for its class. The BMW 330i, for example, is rated at 28 MPG combined, offering similar performance and efficiency. The Audi A4 2.0T Quattro gets 27 MPG combined, but offers standard all-wheel drive, which increases traction but slightly reduces fuel economy. The Lexus IS 300, known for smoothness and reliability, gets 24 MPG combined. The C300 buyer wants luxury, performance, efficiency and style. Other cars are similar, but the Mercedes brand is a selling point. Find C300 MPG across all years.

Tips to maximize efficiency

Pay attention to tire pressure. Keeping the right tire pressure, usually on a sticker on the driver’s side door, lowers rolling resistance and improves fuel economy. Low tires create more friction, making the engine work harder. Regularly check and adjust your tire pressure.

Avoid unnecessary idling. Letting your C300 idle wastes fuel, especially in modern cars. If you’ll be stopped for more than a minute or two, turn off the engine. Modern starters can handle frequent starts.

Use cruise control. Cruise control helps keep a consistent speed on the highway to improve fuel economy significantly. Use it carefully. Turn off cruise control in hills or heavy traffic, as it may use more fuel than needed. Watch the road and adjust your speed.

Accelerate and brake gently. The C300 is comfortable, and rewards smooth driving. Avoid accelerating or braking hard, as this hurts fuel economy. Instead, accelerate slowly and watch traffic to avoid sudden stops. Gentle driving saves gas and makes driving more enjoyable.