This is the Mercedes E-class cabriolet, which has been spied testing undisguised for the first time.
The new cabrio has been undergoing extensive development in recent weeks ahead of its official launch next year at the Detroit motor show, including at the Nurburgring and on British roads.
Its front-end styling is identical to that of its coupe sibling, while it will feature a traditional folding fabric roof to boost rear passenger and luggage space, and also keep its weight to a minimum.
A retractable wind deflector sits on top of its windscreen, which is designed to direct wind over the top of the passenger compartment, eliminating buffeting and reducing noise with the roof down.
Another application could be to improve aerodynamics by keeping the air flowing over the car. Convertibles are often less aerodynamic than their hard-top cousins and Mercedes’ new innovation may help.
The coupe version of the new E-class is the world’s most aerodynamic production car with a Cd of 0.24, and Mercedes is keen to use slippery shapes to improve efficiency.
It is likely the deflector can be raised or lowered to give a more traditional wind-in-the-hair experience. Mercedes is also rumoured to be working on a warm air 'scarf' system for both the front and rear passengers.
When the E-class cabrio goes on sale in April, it will have the same range of four, six and eight-cylinder engines as the latest E-class saloon and coupe, including the twin-turbo four-cylinder E250 CDI. Most models are expected to get the seven-speed automatic transmission.