This prototype was spotted right outside Daimler's research and development headquarters in Sindelfingen, Germany. Unlike in earlier spy photos, this vehicle is wearing production-ready tail-lights, trim pieces and grille, not to mention less camouflage than before.
As with the C-Class coupe, which was spied earlier this week dancing around in the Swedish snow, the convertible seen here features, what seems to be, a false set of panels affixed to the trailing edge of the boot lid. This gives the prototype a look reminiscent of the previous-generation BMW 6-Series.
At the rear, the convertible features a tapered boot lid flanked by slimline tail-light modules, which resemble the units fitted to the S-Class coupe. While the BMW 4 Series is equipped with folding hardtop, the C-Class cabriolet is fitted with a fabric top.
Compared to the popular the C-Class sedan and wagon, which was recently crowned 2015 World Car of the Year, the convertible and the coupe both feature frameless side windows and flag post-style wing mirrors.
Under the skin, the C-Class cabriolet will likely feature most of the four-, six- and eight-cylinder turbocharged petrol and diesel engines employed elsewhere in the C-Class range.
The C-Class cabriolet, and the companion coupe model, are expected to debut at the 2015 Frankfurt motor show, which takes place in September.