The 2024 Mercedes-Benz GLC300 4matic Coupe, equipped with its 2.0L 4-cylinder engine, gets a combined fuel economy of 26 MPG. It’s not going to win any hypermiling contests, but it’s where it needs to be for its target demographic: style-conscious buyers who prioritize the coupe’s distinctive silhouette and premium features over outright efficiency. It’s a statement, not a Prius, and the fuel economy reflects a balance between performance, luxury, and head-turning design. The GLC300 Coupe appeals to those who want some practicality but value aesthetics.

City and highway performance

In the city, the GLC300 Coupe gets 24 MPG. Stop-and-go traffic can be hard on fuel consumption, but the GLC300’s smooth engine start/stop system helps reduce wasted fuel at red lights. The GLC300 Coupe gets 30 MPG in highway driving. The 9-speed automatic transmission allows the engine to cruise at lower RPMs, resulting in better fuel economy at higher speeds. The GLC300 has enough power to cruise at comfortable speeds, and aerodynamic improvements assist with fuel economy on the highway.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2024 Mercedes-Benz GLC300 4matic Coupe is $2,250. This estimate is based on driving 15,000 miles per year and using national average fuel prices. Actual fuel costs will vary depending on individual driving habits, local fuel prices, and the type of fuel used. If you drive more aggressively or spend a lot of time in heavy traffic, you’ll likely exceed this estimate. Fuel costs would be less for someone driving fewer miles per year.

Real-world expectations

While the EPA provides a standardized measure of fuel economy, real-world MPG will always vary based on individual driving habits and conditions. The GLC300 Coupe’s MPG can change depending on your driving style. Hard acceleration and frequent hard braking will decrease fuel economy, while smooth, consistent driving will help you get closer to the EPA estimates. Keep in mind that factors like tire pressure, vehicle load, weather conditions, and terrain can all impact your MPG. The EPA numbers provide a solid baseline, but don’t be surprised if your experience is slightly different.

How it compares

The GLC300 Coupe’s fuel efficiency is in a competitive class. The BMW X4 xDrive30i, a close competitor, offers similar performance and style, achieving around 23 MPG combined. The Audi Q5 Sportback delivers comparable MPG, with the 45 TFSI quattro version also hovering in the mid-20s. You might compare with the Lexus NX, but even the NX 350h hybrid only exceeds the GLC by a meaningful amount for city driving. The numbers are comparable on the highway, so it’s what a driver values more. For buyers choosing between these vehicles, the GLC300’s fuel economy may not be the deciding factor. Instead, things such as brand preference, design, features, and overall driving experience typically carry more weight. You can view all Mercedes Benz fuel economy data on our site.

Tips to maximize efficiency

Use the GLC300’s drive modes. Selecting “Comfort” mode optimizes the car for fuel efficiency by adjusting the engine and transmission settings for smoother acceleration and less aggressive power delivery. This mode is perfect for everyday driving and can help you get the most miles out of each gallon.

Monitor your tire pressure regularly. Underinflated tires create more rolling resistance, which reduces fuel economy. Check your tire pressure at least once a month and inflate your tires to the recommended pressure listed on the door jamb. This simple task can make a noticeable difference in your MPG.

Avoid idling. If you’re stopped for more than a minute, turn off the engine. The GLC300’s engine start/stop system automatically does some of this. Consider turning it on when driving in stop-and-go situations and be sure it’s turned off when you want the engine to run continuously.

Keep up with scheduled maintenance. Regular oil changes, filter replacements, and tune-ups will help your GLC300 run efficiently. A well-maintained engine consumes less fuel and delivers optimal performance. Check your vehicle’s maintenance schedule in the owner’s manual and follow it diligently. You can also browse GLC300 MPG across all years to compare data.

Use cruise control on the highway. Maintaining a consistent speed is much easier on gas than accelerating and decelerating. When driving on the highway, engage cruise control to maintain a steady speed and improve your MPG. The adaptive cruise control can be especially useful by maintaining speed and distance with the car in front of you.