Mercedes-Benz S400 Hybrid

  • Paul Meyers

When Mercedes-Benz decided that it was time for the S-Class to receive a nip-tuck-style face-lift for 2010, it also chose to offer a model that would appeal to a more discriminating driver: one that concedes to environmental concerns, rather than carelessly burning rubber at every stoplight. The S400 Hybrid ($87,950) is the manufacturer’s first hybrid model ever. With this sedan, Mercedes-Benz pushes the technological envelope—this is the first mass-production car that utilizes a lithium-ion battery pack—and follows down the trail initially paved by the Lexus LS 600h L.

The S400 produces 295 hp from its 3.5-liter V-6 (275 hp from the gas engine, plus 20 hp from the electric motor), which is rather inadequate to motivate a 4,475-pound car with any sense of urgency. This becomes evident when you compare the acceleration times of the standard models with the hybrid: Mercedes’ entry-level S-Class, the V-8-equipped S550, goes from rest to 60 mph in 5.4 seconds, while the hybrid takes 7.2 seconds. But all is forgotten—and forgiven—on the highway, as the S400 performs and handles just like your everyday S-Class while returning up to 26 mpg. But the hybrid system’s most useful fuel-saving feature—its start-stop technology—is best felt driving through the city. Stopping at a light or in traffic will automatically shut down the engine until you lift off the brake—this is really where most owners will notice a difference.

Those looking for a powerful full-size sedan should look into the S65 AMG, but for those interested in driving a big, comfortable car that gets respectable fuel mileage, the S400 Hybrid is at the top of the list.

Configuration: Front-engine, rear-wheel drive, sedan
Engine: 3.5-liter V-6 (with an electric motor)
Transmission: 7-speed automatic
Power: 295 hp at 6,000 rpm
Torque: 284 ft.-lbs. at 2,400 rpm
Curb weight: 4,475 pounds
Zero to 60 mph: 7.2 seconds
Top speed: 155 mph

Watch the video of the Mercedes-Benz S400 Hybrid

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