21 MPG combined won’t win any awards for fuel efficiency, but for the 2020 Mercedes-Benz S560, it’s an acceptable trade-off for strong power, a comfortable ride, and advanced technology. This isn’t a car for hypermilers or those primarily concerned with saving at the pump. It’s for individuals who prioritize luxury, status, and performance and view fuel costs as a secondary consideration.

City and highway performance

The EPA estimates the S560 will achieve 17 MPG in the city and 27 MPG on the highway. The difference between these figures highlights the nature of the S560’s fuel consumption. In dense urban environments, the strong 4.0L twin-turbo V8 is constantly working to move the S560’s weight, resulting in lower efficiency. However, on the open road, with the adaptive cruise control engaged and the engine barely ticking over, the S560 can deliver respectable highway mileage. The nine-speed automatic transmission plays a crucial role here, keeping the engine in its most efficient rev range for sustained cruising. This is not a car designed for stop-and-go traffic. It prefers long stretches of open highway, where its power and refinement can truly shine.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2020 Mercedes-Benz S560 at $2,750. This figure is based on driving 15,000 miles per year, with 55% of those miles driven in the city and 45% on the highway, using national average fuel prices. Owners should recognize that this is merely an estimate. Individual fuel costs will depend on driving habits, location, and fuel prices in their area. While the S560’s owners might not care about this cost, it remains an expense that buyers should take into account. Those examining S560 MPG across all years will see a consistent theme.

Real-world expectations

While the EPA provides a standardized benchmark, real-world fuel economy can vary a lot. Aggressive driving, frequent short trips, and even tire pressure can all impact the S560’s fuel efficiency. Expect to see figures closer to the EPA estimates during relaxed highway driving. But anticipate lower numbers when using the engine’s full potential or navigating congested city streets. The S560 is a heavy vehicle, and its powerful engine requires ample fuel to deliver its performance. Factors like ambient temperature and the use of climate control can also nudge fuel consumption up or down.

How it compares

Compared to its competitors, the S560’s fuel economy is normal for a large, powerful luxury sedan. The BMW 750i xDrive, with its 4.4L V8, achieves a similar 17 MPG city and 25 MPG highway. The Audi A8, equipped with a 3.0L V6, fares slightly better at 19 MPG city and 28 MPG highway but sacrifices some of the S560’s outright power. The Lexus LS 500h hybrid offers a more efficient 25 MPG city and 33 MPG highway, appealing to buyers who prioritize less gas without completely abandoning the luxury experience. Buyers cross-shopping these vehicles need to weigh the blend of performance, features, and status that each offers. The fuel economy is a factor, but rarely the determining one.

Tips to maximize efficiency

Given the S560’s need for premium fuel, adopting some fuel-saving habits can make a difference over time. Gentle acceleration and anticipating traffic flow can reduce the amount of fuel consumed during each drive. The S560’s driving dynamics settings offer an “Eco” mode, which softens throttle response, optimizes shift points, and reduces the energy consumption of auxiliary systems, all contributing to improved fuel efficiency.

Ensure that the tires are properly inflated to the recommended pressure. Underinflated tires increase rolling resistance, forcing the engine to work harder and decreasing fuel economy. Check the tire pressure regularly, particularly during seasonal temperature changes.

Minimize excess weight in the vehicle. Removing unnecessary items from the trunk and rear seats can help reduce the overall load on the engine. Every little bit contributes to improved fuel efficiency, especially in urban driving conditions.

Avoid prolonged idling. If you anticipate stopping for more than a minute or two, turn off the engine. Modern engines are designed to restart quickly and efficiently, and idling consumes fuel without providing any benefit, though some might argue it keeps the AC running cold on a hot day.

Consider using cruise control on the highway. Maintaining a consistent speed can improve fuel economy compared to constantly accelerating and decelerating. The S560’s adaptive cruise control system can enhance efficiency by automatically adjusting speed to maintain a safe following distance, reducing unnecessary braking and acceleration and those who want to see all Mercedes Benz fuel economy data can research more.