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Latest spy photos show Mercedes-Benz has commenced testing of the C-Class Cabriolet in the range-topping C63 guise.

After coming out with the C-Class Coupe range last month at the Frankfurt Motor Show, the Germans are now focusing on the next member of the C-Class lineup, the Cabriolet. It has already been spotted by our agile photographers a few times, but it’s only now we get to see the compact premium open-top model from Daimler in the flagship C63 version which like all recent high-performance models with the three-pointed star will be sold as a Mercedes-AMG.

Although it has extensive camouflage, it’s really not that hard to imagine how the car will look like if you check out the C63 Coupe. The body will remain pretty much the same, albeit with some changes to the trunk in order to accommodate the fabric roof. It will obviously eschew the fixed metal roof in favor of an electrically retractable soft top which will add some weight and thus hamper performance a little bit for the sake of open-top thrills.

Just like the coupe, power will come from a V8 twin-turbo 4.0-liter engine which will be available in two states of tune: 476 PS (349 kW) and 650 Nm (479 lb-ft) in the base model and 510 PS (375 kW) and 700 Nm (516 lb-ft) in the hotter S model. The latter will likely cover the 0-62 mph (0-100 km/h) run in an estimated 4.1 seconds taking into account the equivalent coupe completes the task in 3.9 seconds. Top speed will be electronically capped at 155 mph (250 km/h), but Mercedes-AMG will probably offer an optional Driver’s Package bumping the limiter to around 170 mph (273 km/h) since the C63 Coupe is limited to 180 mph (290 km/h).

Like they did with the C-Class Coupe, Mercedes-Benz will introduce the full C-Class Cabriolet lineup including the crown jewel C63 spotted here. An official reveal could occur as early as March at the Geneva Motor Show, with sales to commence thereafter just in time for the summer.

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