The high-performance version of the redesigned second generation of the Mercedes CLS-class four-door retains the numerical name of its predecessor but not the normally aspirated 6.3-liter V8 those digits represented. Despite the new engine being smaller, there’s nothing wrong with the power put out though: it has the same 518bhp as the E63 AMG, but produced at 5250rpm rather than 6800rpm.
Getting this power to the rear wheels is the AMG seven-speed multiclutch transmission with four modes--comfort, sport, sport+ and manual. A Race Start launch mode is part of the Performance package option.
While the CLS550 rides on the Airmatic suspension, the CLS63 AMG has an adaptive suspension with driver-adjustable settings.
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Not everyone loves the looks of the new CLS, but with the more aggressive bonnet, bumpers and sills it looks like it was born to wear its AMG bodykit (rather than being tacked on as an afterthought). And a whole host of body panels are made from aluminium to cut weight, including the doors, front wings, bonnet, bootlid and parcel shelf.
Inside there’s Nappa leather on the sports seats, a three-spoke AMG steering wheel with paddles, and alongside the new-spec stubby gearstick is the AMG Drive Unit with a dial for the gearbox settings and buttons to control the suspension and ESP. With the dash wrapped in leather and lots of silver highlights, it feels more special than the E63, which looks a little utilitarian in comparison.
The body and interior aren’t the only elements that get significant upgrades, of course: the chassis has been retuned as well. The CLS63 AMG features steel coils in front and air springs in back, with automatic ride-height control and electronically adjustable, three-stage damping. The electrohydraulic steering has been tweaked by AMG, and the stability-control system has three settings to enable occasional tail-waggin’ fun within a broader safety envelope. When you get on the brakes, get ready to slow down quickly: all four brake discs measure 14.2-inches in diameter. The show car had gold-painted brake calipers emblazoned with the word “ceramic," and carbon-ceramic brakes will be a special-order option. A limited-slip differential is available, too, as a standalone add-on.