Merc’s flagship four-door just got a buncha upgrades at this year’s Shanghai Auto Show, and while the German automaker puts fuel efficiency and a cylinder deactivation system at the top of its list, fear not – both models are still crazy fast. Tweaks were applied to the engine, transmission, and AWD system, not to mention the exterior styling and interior design, and the result is a mighty slab of Teutonic speed and luxury that’s every inch worthy of bearing the Mercedes torch.
Let’s jump straight into the greasy bits, starting with the S 63 4Matic+. This thing gets a new 4.0-liter turbo V-8, ditching the old 5.5-liter turbo V-8 and replacing the lost displacement with more boost. Final output figures come to 612 horsepower, which is 27 horses more than the old 5.5-liter lump. The 4.0-liter also makes an impressive 554 pound-feet of torque starting at just 2,750 rpm. Apply all that power, and you’ll go 0-to-62 mph in 3.5 seconds.
Cog swaps are handled by a 9-seed automatic gearbox, which replaces the old 7-speed box. Top speed is limited to 155 mph, although the optional Driver’s Package raises the limit to 186 mph.
Meanwhile, the even-faster S 65 gets the same 6.0-liter turbo V-12 as before, producing a very mighty 630 horsepower and 738 pound-feet of torque. The transmission is also a carryover, with a 7–speed automatic onboard to route the muscle.
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