23 MPG combined won’t win any hypermiling awards, but for the 2024 Mercedes-Benz AMG GLB35 4matic, it’s a reasonable compromise between performance and practicality. This isn’t a vehicle purchased for its fuel sipping abilities; it’s a compact SUV that delivers fun AMG performance in a versatile package. Buyers want the strong 2.0L turbocharged engine, the responsive AMG-enhanced transmission, and the surefootedness of 4matic all-wheel drive. The fuel economy is part of the equation.

City and highway performance

The EPA estimates the AMG GLB35 at 21 MPG in the city and 26 MPG on the highway. The city figure reflects stop-and-go traffic, where the turbocharger activates often during acceleration. The highway MPG is better, suggesting that consistent cruising speeds let the GLB35 achieve its most efficient operation. Note that the AMG-tuned engine encourages spirited driving, which will impact the real-world figures. It’s difficult to resist the urge to exploit the available power, and that will diminish the MPG.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2024 Mercedes-Benz AMG GLB35 4matic at $2,500. This figure is based on driving 15,000 miles per year and using national average fuel prices. Fuel costs will vary depending on driving habits, local fuel prices, and the percentage of city versus highway driving. Drivers who frequently accelerate aggressively or spend most of their time in congested urban environments should expect to exceed this estimate.

Real-world expectations

The EPA provides a standardized benchmark, but real-world fuel economy can change. Owners report that achieving the EPA’s 26 MPG highway estimate is possible during long road trips at steady speeds. Combined figures closer to 20-22 MPG are more common for drivers who regularly experience mixed driving conditions. Factors such as ambient temperature, tire pressure, and the using air conditioning can also change fuel consumption. Expect that your results differ from the official numbers, driving style is the largest factor.

How it compares

The AMG GLB35’s fuel economy is competitive among performance-oriented compact SUVs. The BMW X2 M35i, with similar performance, achieves a comparable 24 MPG combined. Stepping up to a larger, more powerful SUV like the Porsche Macan S (21 MPG combined) has a predictable drop in efficiency. Even the less performance-focused Audi Q5, with a 45 TFSI engine, only manages 26 MPG combined, which shows that all-wheel drive and added weight impact fuel consumption. The AMG GLB35 buyer is sacrificing some efficiency for power and driving dynamics and compares it against other performance-oriented vehicles more often than eco-minded commuters.

Tips to maximize efficiency

The AMG GLB35 has AMG Dynamic Select driving modes. Choose “Comfort” or “Eco” for less aggressive throttle mapping and earlier upshifts to optimize fuel consumption during daily commutes. Avoid “Sport” or “Sport+” unless you need the enhanced performance, as these modes prioritize acceleration over efficiency.

Ensure that your tires are properly inflated to the recommended pressure (found on the doorjamb sticker). Underinflated tires increase rolling resistance, forcing the engine to work harder and burn more fuel. Check tire pressure regularly, especially during seasonal temperature changes.

Minimize unnecessary weight in the vehicle. Hauling around extra cargo increases fuel consumption. Remove items that aren’t essential, such as sporting equipment or tools, to lighten the load and improve overall efficiency.

Anticipate traffic flow and maintain a steady speed whenever possible. Avoid abrupt acceleration and braking, as these actions rapidly deplete fuel. Using cruise control on the highway can help maintain a consistent pace and reduce fuel consumption.

Consider using premium fuel as recommended by Mercedes-Benz. While the engine may run on lower octane fuel, using the recommended fuel can optimize performance and potentially improve fuel economy. Refer to your owner’s manual for specific fuel recommendations.

Check all Mercedes Benz fuel economy data. See AMG MPG across all years.