15 MPG combined. That’s the EPA’s figure for the 2017 Mercedes-Benz AMG GLE63 equipped with its strong 5.5L V8. To some, that number might seem shockingly low. But to the target buyer, someone seeking a high-performance SUV that can transport the family in comfort and style, fuel economy is likely a lower priority than prodigious power, impressive acceleration, and the prestigious three-pointed star on the hood. They understand that driving a hand-built AMG engine comes at a cost, and they’re willing to pay it.

City and highway performance

The EPA breaks down the GLE63’s fuel consumption further, estimating 13 MPG in city driving and 17 MPG on the highway. The city figure reflects the stop-and-go nature of urban commutes, where the engine spends more time idling or accelerating from a standstill, precisely the conditions where a large, naturally aspirated V8 tends to be least efficient. The higher highway figure demonstrates how the GLE63 can achieve somewhat better economy under steady-state cruising, although even 17 MPG is hardly impressive for a modern vehicle. A significant factor is the vehicle’s considerable weight, as well as the aerodynamic compromises inherent in its SUV shape.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2017 Mercedes-Benz AMG GLE63 at $3,850. This figure is based on driving 15,000 miles per year and using the national average fuel price for premium gasoline (which is required for optimal performance in the GLE63). Keep in mind that this is only an estimate. Your actual fuel costs will vary depending on your driving habits, the type of driving you do, and local fuel prices. Push that accelerator enthusiastically and frequently, and you can readily exceed $3,850. Opt for more economical driving and you *might* come in a little lower.

Real-world expectations

While the EPA figures provide a useful benchmark, real-world fuel economy often differs. The aggressive driving style that an AMG vehicle encourages will almost certainly lead to lower MPG than the EPA estimates. Factors like cold weather, tire pressure, and carrying extra weight (passengers or cargo) can also reduce fuel efficiency. Owners who drive primarily in cities and frequently exploit the GLE63’s performance potential shouldn’t be surprised to see single-digit MPG averages on their trip computers. Consider exploring all Mercedes Benz fuel economy data.

How it compares

Compared to its competitors, the 2017 AMG GLE63’s fuel economy is predictably low. The BMW X5 M, with its 4.4L twin-turbo V8, achieves similar EPA numbers, around 14 MPG combined. The Porsche Cayenne Turbo S, while equally powerful, also hovers around the same fuel economy range. Moving down to less performance-oriented models reveals a significant difference. For example, a non-AMG GLE 350 with its V6 engine achieves around 21 MPG combined. The difference in MPG directly corresponds to the trade-off between performance and efficiency that AMG customers knowingly accept. See AMG MPG across all years.

Tips to maximize efficiency

While the AMG GLE63 is not inherently fuel-efficient, some techniques can help maximize MPG. Avoid rapid acceleration and hard braking. The more smoothly you drive, the less fuel you’ll consume. Treat the accelerator pedal with restraint, and anticipate traffic conditions to minimize unnecessary stops and starts.

Ensure that your tires are properly inflated. Underinflated tires increase rolling resistance, which reduces fuel economy. Check your tire pressure regularly and inflate them to the manufacturer’s recommended levels, found on a sticker inside the driver’s side door. Tire pressure changes with temperature, so check more frequently during seasonal changes.

Reduce your vehicle’s weight. Carrying unnecessary items in the trunk or cargo area adds weight, forcing the engine to work harder and consume more fuel. Remove any items you don’t need to improve fuel efficiency, though bear in mind that the effect will be minimal compared to driving style.

Use cruise control on the highway. Maintaining a constant speed minimizes fluctuations in fuel consumption. Cruise control is most effective on relatively flat stretches of road, where it can prevent unnecessary acceleration and deceleration.

Consider using the “Comfort” or “Eco” driving modes, if equipped. These modes typically adjust the engine and transmission settings to prioritize fuel efficiency over performance. Expect a noticeable reduction in responsiveness, but also a small improvement in MPG.