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Riding in the Mercedes-AMG GT C Roadster with the Boss of the Auto Brand

Mercedes-AMG chairman Tobias Moers test-drives the high-powered convertible in the Nevada desert…

The head of Mercedes-AMG tests the brand’s upcoming convertible in the Nevada desert.

This past fall, about a year before the scheduled U.S. on-sale date of the Mercedes-AMG GT C Roadster (mercedes-amg​.com), I was in the Nevada desert on a hot and sunny afternoon riding shotgun in a prototype of the open-air hot rod. Mercedes-AMG chairman Tobias Moers was at the wheel. It’s cool and rainy in Moers’s native Germany at that time of year, so he and the car were in the Silver State, where he could personally validate its driving dynamics in convertible-friendly conditions while the onboard logging equipment collected data for the AMG engineers to study. He wanted to ensure that the GT C Roadster sounds, feels, and responds exactly as it’s supposed to when you drop the top and take it for a ride on an open road.

The 4-liter twin-turbo V-8 blasted, crackled, and barked as Moers negotiated a sinewy stretch of highway. “It has to sound and feel natural,” he said. “It’s a big task.” The car’s performance was impressive, but it wasn’t quite ready to receive Moers’s blessing. After the ride, he mentioned that the steering needed further fine-tuning, although I certainly couldn’t detect any imperfections from the passenger seat.

With a 550 hp engine, the GT C Roadster is only a little shorter on muscle than the 577 hp GT R coupe, which is scheduled to go on sale in the summer. Like that model, the GT C Roadster features four-wheel steering, an adjustable coil-over suspension, an electronic differential, and a race mode that calibrates the 7-speed dual-clutch transmission for track driving. The GT C Roadster also shares the GT R’s active air-management system, which features electronically operated louvers behind the grille that open to help cool the engine when needed. When shut, the louvers enhance the car’s aerodynamic efficiency. The zero-to-60-mph time is 3.7 seconds, and top speed is 196 mph.

The GT C Roadster is the more powerful of the two forthcoming Mercedes-AMG GT convertible variants. (Prices for the models have not been announced.) The 469 hp GT Roadster still packs more punch than the currently available GT coupe, but it is also about 120 pounds heavier because of the body bracing that’s needed to maintain rigidity in the absence of a roof. The GT Roadster can reach 60 mph from a standstill in 3.9 seconds and achieve a top speed of 188 mph.

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