13 MPG combined. That’s abysmal by modern standards. The 2016 Mercedes-Benz G550 isn’t about modern standards. It’s a rolling anachronism, a military-bred brute draped in leather and luxury, purchased by those who value presence and capability over Prius-like efficiency. This isn’t a vehicle bought with fuel economy in mind; it’s bought with a particular type of unapologetic statement in mind, one that shouts “I can go anywhere, and I can do it in ultimate comfort.”

City and highway performance

The EPA rates the 2016 G550 at 13 MPG in both city and highway driving. This near-identical rating suggests that the 4.0L twin-turbo V8, paired with the 7-speed automatic transmission, doesn’t find much advantage on the open road. The G550’s boxy shape and considerable weight, over 5,700 pounds, create a significant aerodynamic penalty. Whether you’re crawling through urban traffic or cruising on the interstate, the engine is working hard to overcome these inherent challenges.

The relatively short gearing of the 7-speed automatic, designed for off-road prowess, also contributes to the lack of highway fuel efficiency.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2016 Mercedes-Benz G550 at $4,450. This figure is based on driving 15,000 miles per year and using national average fuel prices for premium gasoline, which the G550 requires. It represents a hefty expense, and one that prospective buyers must carefully consider. For context, this is significantly more than the average vehicle, placing the G550 in a bracket typically reserved for high-performance sports cars or heavy-duty trucks. If you’re browsing all Mercedes Benz fuel economy data, you’ll quickly notice the G550 is an outlier.

Real-world expectations

While the EPA provides a standardized benchmark, real-world fuel economy often varies. Factors like driving style, terrain, and traffic conditions can significantly impact the G550’s MPG. Aggressive acceleration, frequent braking, and prolonged idling will undoubtedly decrease fuel efficiency. Conversely, gentle driving with minimal stop-and-go can potentially yield slightly better results, although exceeding the EPA estimates is unlikely.

Given the G550’s intended use, often involving off-road excursions or towing, expect fuel economy to frequently fall below the official ratings. Therefore, budget realistically for fuel costs significantly higher than $4,450, especially if your driving habits are spirited or involve challenging conditions. Looking at G550 MPG across all years will show a consistent pattern of low efficiency.

How it compares

The G550’s fuel economy sits at the bottom of the luxury SUV segment. Consider the Land Rover Range Rover, another large and luxurious SUV with off-road capability. While its supercharged V8 variants hover around the same 16 MPG combined, the Range Rover offers more efficient engine options, such as the plug-in hybrid, which vastly improves fuel economy. Even the Cadillac Escalade, a larger SUV, manages around 17 MPG combined with its V8 engine. The Porsche Cayenne, though not directly comparable in terms of off-road credentials, offers a significantly more palatable 20-22 MPG combined in its various non-hybrid configurations.

For the G550 buyer, however, this comparison might be secondary. They’re not prioritizing efficiency; they’re prioritizing the G-Wagen’s unique blend of image, capability, and exclusivity.

Tips to maximize efficiency

Given the G550’s inherent limitations, maximizing fuel efficiency requires a conscious effort. Avoid aggressive acceleration and braking. The twin-turbo V8 delivers ample power, making it tempting to exploit its performance, but doing so will quickly drain the fuel tank. Drive smoothly and anticipate traffic flow to minimize unnecessary stops.

Maintain proper tire inflation. The G550’s large tires play a crucial role in fuel economy. Underinflated tires increase rolling resistance, requiring the engine to work harder. Regularly check and maintain the recommended tire pressure, which can be found on the driver’s side doorjamb or in the owner’s manual. Small changes in tire pressure can make a noticeable difference over time.

Minimize idling time. Letting the engine idle for extended periods consumes fuel without covering any distance. If you anticipate a delay, such as waiting for someone or sitting in a parking lot, turn off the engine. While the G550 lacks an automatic start/stop system, manually turning off the engine during prolonged stops can save a surprising amount of fuel.

Consider your driving route. Whenever possible, choose routes that minimize stop-and-go traffic and avoid steep inclines. The G550’s weight and aerodynamics make it particularly sensitive to changes in elevation. Opting for flatter, less congested routes can improve fuel efficiency, even if it adds a few minutes to the journey.