Based on appearances alone, we could understand any confusion caused by this mid-cycle refresh, but if you go beyond the superficial, the 2018 Mercedes-Benz S-class sedan lineup really is thoroughly updated. Aside from subtly altered trim, bumpers, and wheel designs, every version from the lowest-level S-class to the horsepower-addled S63 and S65 AMG models to the range-topping Maybach twins receives notable changes. New Engines Beget New Model Designations Look closely, however, and you’ll notice new badges that indicate where the real changes lurk. S450 and S560 are the new S-class designations boasting new V-6 and V-8 engines. The S450 essentially replaces the outgoing six-cylinder S550e plug-in-hybrid model (there’s no word on the plug-in’s fate) and is powered by a 362-hp…
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