2021 Mercedes-Benz G550 Fuel Economy: What To Expect

18 MPG combined isn’t going to win any fuel efficiency awards, but for the 2021 Mercedes-Benz G550, fuel economy is almost beside the point. This isn’t a vehicle purchased for its frugality. It’s a statement, a symbol of capability and luxurious excess. G-Wagen buyers are purchasing an icon, a vehicle that’s as capable climbing a mountain as it is cruising Rodeo Drive. They are fully aware, and likely unconcerned, with its thirst for premium unleaded.

City and highway performance

The EPA estimates the 2021 G550 will achieve 17 MPG in the city and 19 MPG on the highway. These figures reflect its boxy shape, hefty weight, and potent 4.0L twin-turbo V8 engine. The 9-speed automatic transmission certainly helps wring the most out of each gallon, but physics are physics. Pushing a vehicle shaped like a brick through the air demands energy, plain and simple. Some owners might see slightly better numbers in consistent highway driving, though aggressive acceleration and stop-and-go traffic will quickly drag those figures down.

Annual Fuel Cost

The EPA estimates an annual fuel cost of $3,200 for the 2021 Mercedes-Benz G550. This calculation assumes 15,000 miles of driving per year and uses the national average fuel price for premium gasoline. Keep in mind that this is just an estimate. Your actual fuel costs may vary significantly depending on your driving habits, the type of driving you do (city vs. highway), and local fuel prices. More spirited driving, which is tempting in a vehicle with this much power, will invariably inflate that $3,200 figure.

Real-World Expectations

The EPA provides a valuable baseline, but real-world G550 MPG often falls short of the official numbers. Owners report a range from the low teens to maybe nudging 20 MPG on long highway trips if driven conservatively. The key factors impacting fuel economy are driving style and terrain. Living in a hilly area or frequently towing will have a noticeable impact. It’s realistic for most G550 owners to expect an average closer to 15 MPG. For a broader view, browse G550 MPG across all years.

How It Compares

Compared to other luxury SUVs, the G550’s fuel economy is undeniably poor. The Land Rover Range Rover, another off-road capable luxury SUV, achieves around 18 MPG combined in its base P360 form and 16 in the higher output P530 trims. The BMW X7 M50i, which offers similar levels of performance and luxury but prioritizes on-road driving, manages around 18 MPG combined. Even some high-performance SUVs like the Porsche Cayenne Turbo (17 MPG combined) fare slightly better. This highlights how much the G550’s design and focus on off-road capability compromise its efficiency. Buyers prioritizing fuel economy may consider these alternatives, but they won’t get the G-Wagen’s unique presence or its unmatched off-road heritage. For a view of the Mercedes-Benz lineup, check out all Mercedes Benz fuel economy data.

Tips to Maximize Efficiency

The G550 will never be a fuel sipper, but there are a few things owners can do to minimize trips to the gas station. The most effective strategy is to adopt a smooth and gentle driving style. Avoid aggressive acceleration and hard braking. Making smooth, gradual movements with the throttle instead of flooring it at every opportunity can save a noticeable amount of fuel over time.

Regular maintenance is also critical. Ensure your tires are properly inflated to the recommended pressure. Low tire pressure increases rolling resistance, which directly impacts fuel economy. Adhere to the manufacturer’s recommended service schedule and ensure the engine is running optimally.

Consider the weight you are carrying. The G550 is already a heavy vehicle, so avoid carrying unnecessary cargo. Removing extra weight from the vehicle can improve fuel economy, even if only slightly. Those few pounds add up quickly.

Finally, plan your trips strategically. Combine errands into a single outing to minimize cold starts, which are particularly fuel-inefficient. Avoiding peak traffic hours can also help you maintain a more consistent speed and reduce stop-and-go driving.