Mercedes also says the S63 AMG accelerates from zero to 60 mph in 4.5 seconds.
At our test track, this big, black behemoth sprinted from zero to 60 mph in 5.2 seconds. If you're disappointed, you've never experienced zero to 60 mph in 5.2 seconds. This car is fast. Blisteringly so. And it's nearly a full second quicker than your Uncle Leo's S550.