Mercedes-Benz S-Class Cabriolet 2016Mercedes-Benz has confirmed it is launching an open-top convertible version of the S-Class, which will debut at the 2015 Frankfurt Motor Show next month.

The new luxury drop-top, which will rival the recently-revised Bentley Continental GT Convertible, will go on sale in 2016 as a super-exclusive pinnacle for the Mercedes-Benz car range.

Shown as an official sketch, the new S-Class Convertible will have four sumptuous seats like the S-Class Coupe it’s derived from: the huge folding roof will be a soft-top rather than a coupe-convertible.

The roof will be fully integrated within the car when down: it will be a fully open design with pop-up rear safety protection rather than permanent rear roll-over hoops.

The teaser sketch suggests Mercedes-Benz has integrated a premium Burmeister sound system offering 3D clarity even with the roof down.

“The new S-Class Cabriolet represents the sixth model of the S-Class family, said Mercedes-Benz in a brief statement, “and is the first luxury four seater cabriolet since 1971.”

Read our preview of the 2015 Frankfurt Motor Show and see what else is in store for the German car extravaganza on 15 September