Redesigned for the 2021 model year with a 603-hp twin-turbo V-8, Mercedes’s high-performance full-size SUV reaches a new level of excess.

Automakers are always looking for white space in the marketplace. Mercedes has gotten quite good at this over the years and has recently identified a previously unfilled gap that apparently needed addressing: Buyers looking for a proper six- or seven-passenger SUV with 600 horsepower and a six-figure sticker price had nowhere to go until the 2021 Mercedes-AMG GLS63 showed up.
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