20 MPG combined isn’t going to win any fuel sipping awards, but for the 2019 Mercedes-Benz S560 Convertible, equipped with a 4.0L 8-cylinder engine, it’s arguably adequate. This isn’t a car bought for its frugality; it’s a statement, refined luxury and effortless power. Owners prioritize open-top motoring, handcrafted interiors, and the unmistakable presence that only an S-Class convertible can deliver. Fuel economy is a secondary concern.

City and highway performance

The EPA estimates the S560 Convertible at 17 MPG in the city and 26 MPG on the highway. The city figure reflects stop-and-go traffic, where the 4.0L V8’s displacement and turbocharging contribute to higher fuel consumption. Out on the open road, the 9-speed automatic transmission allows the engine to settle into a more efficient cruising speed. The highway figure is reasonable, but exceeding it requires a gentle right foot. While Mercedes-Benz offers impressive technology, physics still apply. The S560’s weight and aerodynamic profile demand a price at the pump.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2019 Mercedes-Benz S560 Convertible is $2,900. This is based on driving 15,000 miles per year, with 55% of those miles driven in the city and 45% on the highway. The calculation also uses the national average fuel price at the time of the EPA’s testing. Actual fuel costs will vary depending on individual driving habits, local fuel prices, and the type of fuel used. Owners residing in areas with higher fuel costs, particularly on the West Coast or in major metropolitan areas, should anticipate spending considerably more than $2,900 annually.

Real-world expectations

EPA estimates provide a benchmark, but real-world fuel economy often differs. Aggressive driving, frequent short trips, and extended idling will negatively impact fuel consumption. S560 owners who prioritize spirited acceleration and the intoxicating exhaust note will likely see figures below the EPA’s estimates. Conversely, those who adopt a relaxed driving style, particularly during highway cruising, may achieve results closer to, or even slightly above, the 26 MPG highway rating. Consistent maintenance, including proper tire inflation and regular oil changes, can also contribute to improved fuel efficiency.

How it compares

The S560 Convertible competes in a segment where fuel efficiency is less of a selling point. Consider the BMW M850i Convertible, which achieves a similar 17 MPG city / 25 MPG highway. The Aston Martin DB11 Volante, while offering unparalleled style, sees even lower numbers. For buyers cross-shopping these vehicles, the S560’s fuel economy is unlikely to be a deciding factor. Instead, interior appointments, brand prestige, and driving dynamics will likely weigh more heavily. You can compare S560 MPG across all years to see how this model stacks up against other S-Class vehicles as well.

Tips to maximize efficiency

While fuel economy might not be a top priority for S560 Convertible owners, there are still steps that can be taken to improve it. Avoid aggressive acceleration and hard braking. The S560’s engine and suspension encourage spirited driving, but restraint will be rewarded at the fuel pump. Use the car’s driving modes to your advantage. Eco mode, if equipped, can optimize engine and transmission settings for improved fuel economy, although it might somewhat dull the performance.

Ensure that your tires are properly inflated. Underinflated tires increase rolling resistance, leading to reduced fuel efficiency. Check your tire pressures regularly and maintain them at the levels recommended by Mercedes-Benz. Remove any unnecessary weight from the vehicle. Extra cargo in the trunk or rear seats adds weight, forcing the engine to work harder and consume more fuel. Only carry essential items to maximize efficiency.

Service the vehicle according to Mercedes-Benz’s recommended maintenance schedule. Regular oil changes, air filter replacements, and tune-ups ensure that the engine is running optimally and efficiently. Combine trips when possible. Short trips often result in lower fuel economy due to the engine not reaching its optimal operating temperature. Consolidate errands into a single trip to minimize cold starts and maximize efficiency.

Consider the route you choose. Avoiding congested areas and opting for routes with fewer stop-and-go situations can significantly improve fuel economy. Use navigation systems to identify the most efficient route and avoid unnecessary idling in traffic. You can browse all Mercedes Benz fuel economy data to see how these tips apply to other models as well.