18 MPG combined is the number to accept if the 2018 Mercedes-Benz AMG GLC63 4MATIC Coupe has captured your attention. It’s the price for blistering acceleration, a snarling soundtrack, and head-turning style. This isn’t a vehicle purchased for sensible commuting; it’s a statement, a visceral experience wrapped in a luxurious package.

City and highway performance

The EPA estimates the GLC63 Coupe at 15 MPG in the city and 22 MPG on the highway. That city figure reflects the stop-and-go nature of urban environments, made worse by the AMG’s eagerness to unleash its 4.0L V8. The highway number suggests some restraint is possible. The 9-speed automatic transmission works hard to keep the engine in its sweet spot, and while temptation is always a toe-tap away, cruising at consistent speeds will yield closer to the EPA’s claim. Just don’t expect miracles when merging or passing; that V8 is always ready to pounce.

Annual fuel cost

The EPA calculates the annual fuel cost for the 2018 Mercedes-Benz AMG GLC63 4MATIC Coupe at $3,200. This figure presumes 15,000 miles of driving per year, using the national average fuel price for premium gasoline (which this AMG demands). It’s a substantial sum, placing it firmly within the territory of enthusiast vehicles. However, prospective buyers are likely more concerned with performance and prestige than pinching pennies at the pump.

Real-world expectations

While the EPA figures provide a benchmark, real-world MPG will vary considerably based on driving style. Frequent use of the AMG’s strong acceleration will undoubtedly drag down fuel economy. Short trips, heavy traffic, and cold weather can all contribute to lower numbers. Conversely, disciplined highway driving might yield slightly better results than the EPA estimate. Expect a range, and be prepared for the lower end if you regularly exploit the GLC63’s capabilities, as most owners will.

How it compares

The AMG GLC63 Coupe doesn’t exist in a vacuum; it competes with other high-performance SUVs and coupes. The BMW X4 M Competition, for instance, boasts a more powerful engine and slightly better fuel economy at a combined 16 MPG. The Porsche Macan Turbo, another contender, delivers around 19 MPG combined, a notable advantage. Even within Mercedes-Benz’s own lineup, the AMG GLE63 Coupe offers a similar experience but with a slightly larger footprint and similar fuel consumption. This comparison matters to buyers because it highlights the trade-offs between performance, practicality, and efficiency. Those prioritizing handling and a slightly smaller size may be willing to accept the GLC63’s fuel economy penalty.

Tips to maximize efficiency

Be gentle with the throttle. The AMG GLC63’s engine is incredibly responsive, but every hard acceleration run burns fuel. Smooth, progressive acceleration will keep the turbochargers from spooling up unnecessarily, minimizing fuel consumption. Use “Comfort” mode for daily driving to take advantage of the less aggressive throttle mapping and earlier upshifts.

Monitor tire pressure regularly. Underinflated tires increase rolling resistance, forcing the engine to work harder and reducing fuel economy. Check your tire pressure monthly and inflate them to the recommended level listed on the door jamb. These tires are expensive, so taking care of them is essential.

Avoid unnecessary idling. Letting the engine idle for extended periods wastes fuel. If you’re stopped for more than a minute, turn off the engine, especially in cold conditions where the engine continues to burn fuel to reach operating temperature. Idling has a disproportionate impact on city MPG, which is the GLC63’s weakest showing.

Plan your routes strategically. Minimize stop-and-go traffic whenever possible. Choose routes with fewer lights and less congestion, even if it means a slightly longer distance. The constant acceleration and braking in heavy traffic significantly impact fuel economy. Pay special attention to mapping software to choose the best routes, and avoid the temptation to show off!

Keep your vehicle properly maintained. Regular maintenance, including oil changes, air filter replacements, and spark plug replacements, ensures the engine runs efficiently. A well-maintained engine burns fuel more cleanly and efficiently, maximizing fuel economy and performance. Consider checking all Mercedes Benz fuel economy data to see if related models have better efficiency.

Finally, while exploring AMG MPG across all years, remember the GLC63 Coupe is not about frugality. It is about intoxicating performance and head-turning looks, and its owners generally accept the fuel consumption as a consequence of those attributes.