26 MPG combined isn’t going to win any hypermiling competitions, but for the 2016 Mercedes-Benz S550e 3.0L 6-cyl, it’s a calculated compromise. This is a plug-in hybrid variant of Mercedes-Benz’s flagship sedan, a vehicle synonymous with opulence, cutting-edge technology, and effortless performance. Buyers aren’t primarily motivated by pinching pennies at the pump. They prioritize a smooth blend of luxury and, to some extent, lower fuel costs. The S550e delivers that, offering bursts of all-electric propulsion alongside the refined power of a turbocharged six-cylinder engine. The fuel economy is therefore an acceptable byproduct of the car’s true mission statement.

City and highway performance

The EPA estimates the S550e at 24 MPG in the city and 30 MPG on the highway. While these figures offer a decent indication of the vehicle’s potential, understanding how they relate to the driving experience is essential. The lower city MPG reflects the S550e’s weight and the stop/start nature of urban driving, though the electric motor can certainly reduce fuel consumption during shorter trips. The highway figure illustrates the efficiency of the turbocharged 3.0L engine at a steady cruise, where its 7-speed automatic transmission keeps it running in the most efficient gear. Keep in mind that using the available electric range will significantly boost the overall MPG, especially in city driving.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2016 Mercedes-Benz S550e 3.0L 6-cyl at exactly $2,250. This figure is based on driving 15,000 miles per year and using the national average fuel prices at the time of calculation. It’s important to recognize that this is merely an estimate. Your actual fuel costs will vary depending on your driving habits, the price of gasoline in your area, and the amount of electric driving you incorporate into your routine. Consistent charging and using the electric range can reduce the $2,250 figure substantially.

Real-world expectations

While the EPA ratings provide a baseline, real-world fuel economy for the S550e can fluctuate quite a bit. Drivers who primarily use the car for short commutes and consistently charge the battery can achieve significantly higher MPG figures, potentially exceeding the EPA estimates. Conversely, those who frequently drive long distances without charging will likely see MPG numbers closer to a traditional gasoline-powered luxury sedan. Understanding your driving patterns is crucial to predicting your fuel expenses. Exploring S550E MPG across all years can offer more insights.

How it compares

The S550e’s fuel economy stacks up differently against its peers, depending on their powertrain configurations. A standard gasoline-powered S550 from the same year, with its 4.7L V8, averages around 20 MPG combined. A hybrid variant like the Lexus LS 600h, while boasting a V8 engine, achieves a combined EPA rating of only 20 MPG as well. The BMW 740e xDrive iPerformance, another plug-in hybrid competitor, delivers a slightly better 27 MPG combined. For buyers prioritizing efficiency above all else, the BMW might seem like the obvious choice; however, others will gladly accept the Mercedes-Benz’s MPG rating in exchange for the prestige and driving experience associated with the S-Class.

Tips to maximize efficiency

Take advantage of the available “E-Mode” and “E-Save” settings. “E-Mode” prioritizes all-electric driving whenever possible, maximizing fuel efficiency for short trips. “E-Save” holds the battery’s current charge for later use, allowing you to reserve electric power for city driving or low-emission zones.

Plan your charging routine. Regular charging is crucial to maximizing the benefits of the plug-in hybrid system. Consider installing a Level 2 charger at home for faster charging times, and take advantage of public charging stations when available. A consistent charging schedule will ensure you’re taking full advantage of the electric motor.

Practice smooth and deliberate driving. Aggressive acceleration and hard braking consume more fuel and deplete the battery more quickly. Gentle acceleration, anticipating traffic flow, and using regenerative braking as much as possible can improve fuel economy noticeably. The S550e’s driving dynamics are designed to reward smooth inputs.

Regular maintenance is important. Ensure your tires are properly inflated, and adhere to the recommended maintenance schedule for oil changes and other fluid replacements. A well-maintained engine operates more efficiently, translating to better fuel economy. For all Mercedes Benz fuel economy data, refer to the official resources.