21 MPG combined is not going to win any awards. But for the 2019 Mercedes-Benz S560, with its 4.0L twin-turbo V8 delivering a forceful 463 horsepower, fuel economy is less of a practical consideration and more a necessary compromise affluent buyers accept for the opulent luxury and effortless performance this flagship sedan provides.

City and highway performance

The EPA estimates for the 2019 S560 break down to 17 MPG in the city and 27 MPG on the highway. The city figure reflects stop-and-go traffic where the relatively large displacement engine, even with its advanced efficiency technologies, consumes more fuel.

The highway number, while seemingly modest, allows for extended cruising range and benefits from the S560’s inherently aerodynamic design. The 9-speed automatic transmission also plays an important role in optimizing fuel economy on the open road, keeping the engine within its most efficient rev range.

Annual fuel cost

Based on EPA estimates, the annual fuel cost for the 2019 Mercedes-Benz S560 is $2,750. This figure is calculated assuming 15,000 miles driven per year, using national average fuel prices. Individual fuel costs can significantly vary based on driving habits, local fuel prices, and the type of gasoline used. Premium fuel is recommended for optimal performance and long-term engine health in the S560.

Real-world expectations

While the EPA figures provide a standardized benchmark, expect some variance in real-world driving. Aggressive acceleration, frequent hard braking, and extended idling will all negatively impact fuel consumption. Owners who prioritize smooth, steady driving and use the S560’s extensive suite of driver-assistance technologies, like adaptive cruise control, are more likely to achieve figures closer to the EPA estimates. Fuel efficiency is influenced just as much by driver behavior as it is by the vehicle itself. Those planning on exploring the S560’s performance capabilities on a regular basis should anticipate fuel expenses to be higher.

How it compares

Among large luxury sedans, the S560’s fuel economy is generally on par with its direct competitors. The BMW 750i xDrive, with its 4.4L V8, delivers approximately 17 MPG city and 25 MPG highway. The Audi A8, equipped with its 3.0L V6, achieves a slightly better 19 MPG city and 28 MPG highway. However, the A8 lacks the raw power of the S560’s V8. Buyers considering the Porsche Panamera, particularly the V8 models, should expect fuel economy similar to or slightly worse than the S560. These comparisons matter to the S560 buyer because while fuel efficiency may not be the primary concern, a significant disparity in fuel costs relative to its competitors might influence their decision.

Tips to maximize efficiency

Take advantage of the “Comfort” driving mode, which optimizes the engine and transmission settings for fuel efficiency. Avoid aggressive acceleration and maintain a steady speed whenever possible. The S560’s computer system is designed to deliver ample power while still attempting to minimize fuel consumption. Allow the system to do its job by resisting the urge to bury the accelerator.

Ensure your tires are properly inflated. Underinflated tires create more rolling resistance, which reduces fuel economy. Check your tire pressure regularly and inflate them to the recommended specifications listed on the doorjamb sticker. Be mindful of added weight; unnecessary cargo impacts MPG.

Consider turning off the engine during prolonged idling, such as waiting in a long line. While the S560 does have an automatic start/stop system, it might not activate in all situations. Manually shutting down the engine can save a noticeable amount of fuel over time. The start/stop can be very taxing on the starter and battery, so reducing unnecessary starts and stops can preserve their life.

Plan your trips strategically to avoid peak traffic hours and routes with frequent stoplights. Efficient route planning can minimize idling time and maximize the opportunity to maintain a consistent speed. Consider downloading fuel-tracking apps and tools that can help you monitor your daily, weekly, and monthly fuel use.

Keep your S560 well-maintained. A properly tuned engine, clean air filter, and fresh spark plugs contribute to optimal fuel efficiency. Schedule regular maintenance appointments according to the manufacturer’s recommendations. You can browse all Mercedes Benz fuel economy data or view S560 MPG across all years.