Given that the forthcoming S-class cabriolet will threaten to cannibalize exactly nothing in the Mercedes lineup, Benz is taking some unusual liberties with the car. The most obvious so far is “leaking” a detailed sketch that shows both the interior and the exterior styling.

Due on sale here next year, the S-class cabriolet will be the first S convertible since 1971, and it will be available with all the usual S-class engines and with both all- and rear-wheel drive. It’s also the sixth variant spun off the current-gen S-class, enough to nearly stretch end to end across Vatican City. The cabriolet will join the sedan (W222), the long-wheelbase sedan (V222), the superlong Mercedes-Maybach (X222), the relatively short coupe (C217), and the oh-no-they-didn’t mega-stretched Pullman.

The sketch shows that the droptop will share much of its aesthetic with the gorgeous coupe, including the sloping, chamfered rear; scalloped sides; and semi-clamshell hood. The open-air car, however, will feature a reinforced set of A-pillars to keep it in line with its siblings in terms of crash safety.

A full four-seater, the center console will flow between the front occupants and into the rear compartment, and the car will carry over the S-class coupe’s highly attractive dashboard. The W222 S-class was launched in 2013 and Benz delivered more than 100,000 of them last year, outstripping competitors like Audi’s A8, BMW’s 7-series, Jaguar’s XJ, and the Lexus LS.