24 MPG combined won’t win any hypermiling contests, but for the 2016 Mercedes-Benz GLC300 4MATIC 2.0L 4-cyl, a compact luxury SUV offering comfort, technology, and capability, it’s an acceptable compromise many buyers are willing to make. They aren’t prioritizing ultimate fuel efficiency; they’re prioritizing a luxurious driving experience with the security of all-wheel drive.

City and highway performance

The EPA estimates of 21 MPG in the city and 28 MPG on the highway show the GLC300’s versatility. The city figure reflects the stop-and-go conditions where the 2.0L turbocharged engine works harder, battling its own weight and that of the vehicle. The highway number reveals the benefits of the smooth 9-speed automatic transmission, which allows the engine to cruise at lower RPMs, saving fuel. This gearbox is perfectly matched to the engine’s character, allowing for relaxed cruising but also quick downshifts when needed for overtaking. The GLC300 never feels strained, regardless of the surrounding traffic.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2016 Mercedes-Benz GLC300 4MATIC at $2,400. This figure is based on driving 15,000 miles per year, with a mix of city and highway driving, and assumes the then national average fuel price. It’s a benchmark for comparison, but your actual costs will depend on your driving habits, the type of fuel you use, and fluctuating gas prices. You can use GLC300 MPG across all years to help you make a buying decision.

Real-world expectations

EPA estimates provide a baseline, however real-world fuel economy always deviates. A driver whose commute is mostly highway miles and who accelerates and brakes smoothly can expect to see figures close to, or even slightly above, the 28 MPG highway rating. On the other hand, someone frequently stuck in rush-hour traffic with a heavier foot will likely see numbers closer to the 21 MPG city estimate, or even slightly lower. Factors like tire pressure, weather conditions, and the use of accessories like air conditioning also contribute to the variability.

How it compares

The GLC300’s fuel economy is in the middle of its competitors. The BMW X3 xDrive28i, with its similar 2.0L turbo engine and all-wheel drive, achieves a nearly identical 24 MPG combined. The Audi Q5 2.0T quattro, another direct competitor, also lands around the same mark. The Lexus NX 300h hybrid offers better fuel economy, around 31 MPG combined, but that comes at a higher initial price and a slightly different driving experience. For buyers prioritizing less gas above all else, the Lexus is a good option, but for those who value the Mercedes-Benz badge, driving dynamics, and interior appointments, the GLC300’s fuel consumption is a reasonable trade-off. You can access all Mercedes Benz fuel economy data here.

Tips to maximize efficiency

Use the GLC300’s ECO driving mode. This mode recalibrates the throttle response and shift points to prioritize fuel efficiency over performance. It might make the car feel less responsive, particularly in city driving, but the fuel savings can be noticeable over time.

Keep proper tire inflation. Underinflated tires create more rolling resistance, forcing the engine to work harder and reducing fuel economy. Check your tire pressure regularly and inflate them to the recommended levels specified on the door jamb sticker.

Avoid idling. Modern engines are designed to run efficiently from a cold start, so there’s no need to let your GLC300 idle to “warm up” for extended periods. If you’re stopped for more than a minute, turn off the engine to save fuel.

Reduce your use of accessories like air conditioning and heated seats. These features draw power from the engine, which increases fuel consumption. Use them carefully, especially when fuel economy is a priority.

Keep your GLC300 maintained. Regular maintenance, including oil changes, air filter replacements, and tune-ups, helps ensure that the engine is running efficiently. Don’t neglect these upkeep points; think of them as long-term investments in fuel savings.