It's hard to wrap your head around the physics of a vehicle the size of a small office park carrying around enough power to nearly keep pace with supercars.    

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Yet, that's precisely what the GLS63 is.     

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Does a vehicle like the GLS63 make sense?    

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Well, yes and no. But after taking a quick spin in one, I can assure you that no matter your opinion on its provenance, it's hard not to smile at full tilt.

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The new sheriff in town packs a 4.0-liter, twin-turbo V8 that pushes output to a stratospheric 603 horsepower and 627 pound-feet of torque.

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For the first time, Mercedes-AMG has also seen fit to throw in the 48-volt mild hybrid setup from its 53 line.     

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EQ-Boost, as it's called, slaps an electric motor between the engine and nine-speed automatic transmission that can add an extra 21 horsepower and 184 horsepower. 

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It's hard to walk away from the GLS63 anything less than impressed.    

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It's just as comfortable as I want a Mercedes to be, yet a simple switch can flip everything on its head and give the vehicle almost preternatural agility.     

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Keep scrolling or clicking to check out even more pictures of the 2021 Mercedes-AMG GLS63.

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