Mercedes estimates the S450 4Matic can reach 60 mph in 4.8 seconds. Accept the car’s inability to vaporize slower drivers-something the S560 and AMG models do effortlessly-and then realize it still has verve. On the road, this means the 4700-pound sedan is not the lug we’ve come to expect of an S-class with anything less than eight cylinders. What matters is that the S450’s torque curve is as wide and fat as back bacon, with the full allotment on tap from 1800 to 4500 rpm. HIGHS: Strong twin-turbo V-6, sublime driving experience, spacious comfort. In the last couple of years, though, Mercedes has kept pace with the industry-wide trend of downsizing and turbocharging engines, flooding them with the kind of torque needed to keep a big sedan on its toes-and it is this strategy that finally aligns the S-class with six-cylinder versions of the Audi A8 and the BMW 7-series. Cutting a couple thousand off the price of an S550 wasn’t enough to change minds: The six-cylinder S was still too slow. More recently, with the 2010 S400 hybrid, Mercedes paired a larger 3.5-liter V-6 with an electric motor.
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The W140 S-class of that era was often compared to a tank for its heavy-duty build quality, and in S320 trim it moved like one-toward the end of that car’s life, the six-cylinder model scored dead last in an April 1998 Car and Driver comparison test. However, since the 1990s, Mercedes hasn’t convinced Americans to buy gasoline six-cylinder S-class sedans in any significant quantity. Now we’ve driven the first U.S.-spec sedans (they’re arriving at dealers now) and, in particular, this S450 4Matic, which shares its twin-turbo 3.0-liter V-6 with much of the current Mercedes lineup. We first drove the refreshed 2018 S-class months ago in Europe and came away impressed by the two V-8 versions available at that time, the S560 and the Mercedes-AMG S63. 2018 Mercedes-Benz S450 Tested: The V-6 S-class.S-class Tested and Full-size Sedans Ranked!
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