Eleven miles per gallon combined. Let’s be clear: buyers of the 2017 Mercedes-Benz G550 4×4 Squared aren’t exactly prioritizing fuel efficiency. They are buying a rolling statement, a monument to excess, and arguably the most capable (and absurd) production off-roader ever conceived by Mercedes-Benz. This vehicle is about presence, capability, and the unapologetic disregard for conventional automotive norms. It’s a G-Wagen turned up to 11, literally and figuratively.

City and highway performance

The EPA ratings for the G550 4×4 Squared are remarkably consistent: 11 MPG in the city and 11 MPG on the highway. This uniformity says a lot about the vehicle’s inherent characteristics. The reason? A potent 4.0-liter twin-turbo V8 engine producing 416 horsepower, coupled with a seven-speed automatic transmission. It’s a combination designed for power, not prudence. Aerodynamics, or the lack thereof, also plays an important role. With its portal axles, massive tires, and tall, boxy profile, the 4×4 Squared punches a comically large hole through the air. This is not a vehicle that slips through the wind; it simply bullies its way forward. The low gearing necessary for serious off-road ventures further exacerbates fuel consumption at highway speeds. If you spend most of your time navigating dense urban environments, expect to see similar numbers to the EPA’s city rating. Open highway cruising won’t improve the situation by much, due to the brick-like aerodynamics and permanent four-wheel-drive system.

Annual fuel cost

Owning a G550 4×4 Squared doesn’t come cheap, and that extends to its fuel bill. The EPA estimates the annual fuel cost at $5,250. This calculation is based on driving 15,000 miles per year, using the national average fuel price for premium gasoline. Bear in mind, fuel costs fluctuate, so this figure is an estimate. However, it’s a stark illustration of the financial commitment required to keep this beast fed. For context, many modern, efficient vehicles cost less than half that amount to fuel annually. The $5,250 figure serves as a sign of financial freedom and a certain devil-may-care attitude.

Real-world expectations

While the EPA numbers provide a baseline, real-world fuel economy can vary based on driving habits and conditions. Aggressive acceleration, frequent off-roading, and prolonged idling will all negatively impact fuel consumption. Owners who primarily use their 4×4 Squared as a city cruiser or weekend toy may see slightly better numbers, perhaps inching closer to 12 MPG in mixed driving. However, pushing the vehicle hard in off-road terrain will quickly send fuel economy plummeting into the single digits. Tire pressure also plays a role, so ensure that your tires are properly inflated. Headwinds and steep grades will further worsen it. Ultimately, anyone considering a G550 4×4 Squared should be prepared to accept its inherent inefficiency as part of the ownership experience.

How it compares

Comparing the G550 4×4 Squared to other vehicles in terms of fuel economy is almost comical. A standard 2017 G550, with the same engine but without the off-road hardware, manages a slightly less embarrassing 13 MPG combined. A Land Rover Range Rover, even with its supercharged V8, typically achieves around 16 MPG combined. Even the notoriously thirsty Hummer H2, a vehicle often cited for its poor fuel economy, could sometimes eke out similar numbers in real-world driving. This comparison is essential for potential buyers who want to assess all Mercedes Benz fuel economy data and understand where this model stands relative to other premium SUVs on the market. Buyers primarily concerned with lower fuel costs might consider a hybrid SUV like the Lexus RX450h, which achieves around 30 MPG combined, although it offers a vastly different driving experience and lacks the extreme off-road capabilities of the G550 4×4 Squared. To see G550 MPG across all years, consider a broader view of the model line.

Tips to maximize efficiency

While “maximizing efficiency” feels almost absurd in the context of the G550 4×4 Squared, there are a few things you can do to minimize fuel consumption.

Avoid unnecessary hard acceleration and maintain a steady speed on the highway. The twin-turbo V8 is responsive, but every burst of speed comes at a cost.

Ensure your tires are properly inflated to the recommended pressure. Underinflated tires increase rolling resistance, which forces the engine to work harder and burn more fuel. Given the massive tires on the 4×4 Squared, even a small pressure difference can have a noticeable impact.

Reduce unnecessary weight. Carrying heavy cargo not only impacts performance but also fuel economy. Remove any non-essential items from the vehicle, especially if you spend most of your time driving around town.

Consider your driving route. Avoiding stop-and-go traffic can significantly improve fuel efficiency. Plan your trips to minimize congestion and choose routes that allow for smoother, more consistent speeds. Short trips, during which the engine is cold, are particularly inefficient.

Stay on top of routine maintenance. Schedule regular servicing to ensure the engine is running optimally. This includes changing the oil, replacing air filters, and ensuring proper spark plug function. A well-maintained engine is a more efficient engine.