The 2019 Mercedes-Benz AMG GLC43 4matic delivers 21 MPG combined, a figure that won’t win any hypermiling competitions, but also won’t deter its target buyer. This isn’t a vehicle purchased for its frugality, it’s acquired for its performance, its luxury, and its undeniable curb appeal. Buyers accept the compromise at the pump because they prioritize the AMG-enhanced experience: the throaty exhaust note, the rapid acceleration, and the responsive handling that separates it from the standard GLC. This is about controlled aggression, not maximizing mileage.

City and highway performance

The EPA estimates the GLC43 4matic at 19 MPG in the city and 25 MPG on the highway. That spread indicates where this vehicle is most frequently driven. In urban environments, with stop-and-go traffic and more frequent accelerations, fuel economy predictably suffers. The highway figure, while better, still reflects the GLC43’s performance-oriented nature. The 3.0L V6 and 9-speed automatic transmission aren’t designed for gentle cruising, they’re tuned for responsiveness, even at 70 MPH.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2019 Mercedes-Benz AMG GLC43 4matic at $2,750. This figure is based on driving 15,000 miles per year, with a fuel price that represents the national average for premium gasoline (which the GLC43 requires). The calculation assumes a mix of city and highway driving that aligns with the EPA’s combined MPG rating. Individual fuel costs will vary depending on driving habits and fluctuations in gasoline prices. Considering all Mercedes Benz fuel economy data, this figure places the GLC43 squarely in the performance SUV category rather than the eco-conscious bracket.

Real-world expectations

While the EPA provides a standardized benchmark, real-world fuel economy can vary significantly. Drivers with a heavier foot, or those who frequently engage the Sport+ driving mode, will likely see numbers below the EPA estimates. Those who prioritize smooth acceleration and use cruise control on the highway could potentially achieve numbers closer to, or even slightly above, the EPA’s projections. Terrain also plays a role, hilly or mountainous areas will inherently reduce fuel economy compared to flat, consistent driving conditions. Understanding driving habits is the key to understanding your personal fuel expenses.

How it compares

Compared to its rivals within the performance SUV segment, the AMG GLC43’s fuel economy is roughly in line with expectations. The Audi SQ5, for example, achieves around 21 MPG combined. The BMW X3 M40i posts similar numbers, typically within a 1-2 MPG range. The Porsche Macan S, known for its performance pedigree, also mirrors the GLC43’s fuel consumption. If you’re looking at AMG MPG across all years, it’s clear that fuel efficiency is not the primary design goal. These vehicles trade some economy for enhanced performance, a trade-off that buyers in this segment are generally willing to make. Also consider that opting for the higher-performance GLC 63 S will result in even worse MPG.

Tips to maximize efficiency

Avoid aggressive acceleration. The AMG GLC43’s engine is incredibly responsive, but each burst of acceleration consumes a significant amount of fuel. Smooth, gradual acceleration will noticeably improve your MPG, especially in city driving. Anticipate traffic flow to avoid unnecessary braking and acceleration.

Use the ECO driving mode if available, especially during periods of steady-state highway driving. This mode will remap the throttle response and shift points of the 9-speed transmission to prioritize fuel efficiency over outright performance. It’s not ideal for spirited driving, but effective for saving gas when cruising.

Ensure your tires are properly inflated. Under-inflated tires increase rolling resistance, leading to reduced fuel economy. Check your tire pressure regularly and maintain the recommended inflation pressures listed on the driver’s side door jamb.

Minimize the use of accessories like air conditioning. While modern HVAC systems draw less power than older units, they still impact fuel efficiency, particularly at lower speeds. Consider using the fan alone when possible.

Keep your vehicle properly maintained. Regular oil changes, air filter replacements, and spark plug maintenance ensure that your engine operates at peak efficiency. A well-maintained engine is a fuel-efficient engine.