16 MPG combined is hardly a figure that will make environmental groups cheer. But for the 2017 Mercedes-Benz Maybach S650 Convertible, equipped with a hand-built 6.0L V12 and the kind of opulent appointments that would make a Saudi prince feel at home, fuel economy is, shall we say, an exercise in managing expectations. This isn’t transportation; it’s a statement. And the statement being made isn’t about carbon neutrality.

City and highway performance

The EPA estimates the Maybach S650 Convertible achieves 13 MPG in the city and 21 MPG on the highway. The city figure represents the brutal reality of hauling over 5,000 pounds of German engineering through stop-and-go traffic. That V12, despite all its technological wizardry, requires a considerable amount of fuel to repeatedly overcome inertia.

The 21 MPG highway number is, relatively speaking, somewhat optimistic. Achieving that requires a light foot and a steady state of cruising. Sudden bursts of acceleration, which are undeniably tempting given the engine’s prodigious power, will quickly erode that number.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2017 Mercedes-Benz Maybach S650 Convertible at $3,600. This is calculated based on driving 15,000 miles per year, with 45% of those miles driven in the city and 55% on the highway, using national average fuel prices. If a figure like $3,600 is concerning, this is not the vehicle for you. Owners of this car are far more likely to be concerned with the cost of maintaining their yacht or staffing their private jet. It’s a fair number to know before buying.

Real-world expectations

Don’t expect to consistently match the EPA’s official numbers. Real-world MPG will vary based on driving style, traffic conditions, and the grade of fuel used. Given the type of buyer for this vehicle, it’s likely that many miles will be accumulated in urban areas, shuttling between high-end restaurants, exclusive boutiques, and private airports. Such driving conditions will almost certainly result in fuel economy closer to the city rating of 13 MPG, if not lower. The MAYBACH MPG across all years tells an interesting story.

How it compares

Comparing the Maybach S650 Convertible’s fuel economy to other vehicles in its class is a bit of an exercise in absurdity. There aren’t many directly comparable vehicles. Consider the Rolls-Royce Dawn, another ultra-luxury convertible. While official figures are hard to pin down, real-world reports suggest similar, or slightly worse, fuel consumption. A Bentley Continental GT Convertible, with its W12 engine, also resides in the same ballpark, albeit a marginally better one, perhaps in the 17–18 MPG combined range.

The reason this matters is simple: buyers in this stratosphere aren’t *necessarily* oblivious to fuel consumption. They just prioritize other factors, like exclusivity, bespoke craftsmanship, and sheer power.

Tips to maximize efficiency

While squeezing every last mile from a gallon might not be the top priority for a Maybach S650 Convertible owner, there are still steps that can be taken to optimize fuel consumption. Gentle acceleration is key. The V12 is immensely powerful, but it consumes fuel at an alarming rate when called upon to deliver its full potential. Treat the accelerator pedal with respect.

Ensure that the tires are properly inflated. Underinflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel. Check the tire pressure regularly and maintain the recommended levels specified in the owner’s manual. Even a seemingly minor adjustment can make a noticeable difference over time.

Limit idling time. Letting the engine idle while waiting is a surefire way to waste fuel. If you anticipate a prolonged stop, turn off the engine. The Maybach S650’s engine management system will restart it smoothly and efficiently when it’s time to move.

Consider using premium fuel. While the owner’s manual may not explicitly require it, using a high-octane fuel can help the engine run more efficiently and smoothly, especially under demanding conditions. This is particularly relevant for a high-performance engine like the V12 found in the S650. Looking at all Mercedes Benz fuel economy data can help inform your choice.