The 2018 Mercedes-Benz GLC300 2.0L 4-cyl gets an EPA-estimated 24 MPG combined. This fuel economy is unlikely to greatly excite or disappoint. As a luxury compact SUV, the GLC300 prioritizes comfort, style, and brand prestige, which are often more important to buyers than outright efficiency. Many buyers are moving from a smaller car or downsizing from a larger one; fuel economy is just one consideration in their decision.

City and highway performance

The GLC300 earns 22 MPG in the city and 28 MPG on the highway, ratings that show acceptable performance in both environments. The strong 2.0L turbocharged four-cylinder engine delivers sufficient power for merging and passing on the highway. The nine-speed automatic transmission helps keep the engine operating efficiently. While not class-leading, these numbers are adequate for a comfortable and capable daily driver like the GLC300. Expect lower fuel economy with frequent stop-and-go traffic or if the vehicle has all-wheel drive and it is often engaged.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2018 Mercedes-Benz GLC300 2.0L 4-cyl at $2,400. This is based on 15,000 miles of driving per year and national average fuel prices at the time of calculation. This is just an estimate, and actual fuel costs will vary depending on driving habits, local fuel prices, and fuel type. Premium fuel is recommended for optimal performance and efficiency in the GLC300.

Real-world expectations

The EPA provides a standardized way to compare vehicles’ fuel economy. However, real-world MPG often varies. Driving style, traffic, and even tire pressure impact fuel consumption. Some 2018 GLC300 owners report slightly better fuel economy than the EPA estimates, while others report less. To maximize fuel efficiency, drive smoothly, avoid idling, and maintain the vehicle regularly. You can find more data points by exploring GLC300 MPG across all years.

How it compares

The 2018 Mercedes-Benz GLC300 has average fuel economy compared to its rivals. The BMW X3 xDrive30i, a key competitor, also achieves 24 MPG combined. The Acura RDX, noted for its reliability, gets 23 MPG combined, and the Lexus NX 300 achieves 25 MPG combined. For most GLC300 buyers, the driving experience and prestige of the Mercedes-Benz brand are more important than the minor fuel economy gains offered by competitors. See all Mercedes Benz fuel economy data to compare to other models.

Tips to maximize efficiency

Pay close attention to tire pressures. Higher pressures can slightly reduce the GLC300’s ride comfort. Keeping your tires properly inflated, as indicated on the door jamb sticker, can noticeably improve fuel economy without a drastic change in ride quality.

Strategically use the GLC300’s driving modes. “Eco” mode softens throttle response and adjusts transmission shift points to prioritize fuel efficiency. This setting can make the car feel less responsive, it’s perfect for highway cruising and stop-and-go traffic where performance isn’t as critical.

Avoid accelerating and braking aggressively. The GLC300’s turbocharged engine delivers power quickly, but flooring the accelerator wastes fuel. Drive smoothly and anticipate traffic to minimize unnecessary braking and acceleration.

Follow the scheduled maintenance. Regular oil changes, air filter replacements, and spark plug inspections ensure the GLC300’s engine runs at its peak efficiency. A well-maintained engine consumes less fuel and produces fewer emissions.

Reduce the vehicle’s weight. Carrying unnecessary weight in your GLC300 reduces fuel economy. Remove items you don’t need from the cargo area; every bit helps, especially for GLC300 owners who frequently transport cargo.