Mercedes will be shouting the virtues of its new C-class saloon from the rafters of Geneva's Palexpo centre in a couple of weeks; what it won't be showing are the various C-class derivatives that the junior executive saloon will sire. Thankfully, Autocar can bring you an advance look at one of them; this is the next C-class Sports Coupe, under development by Mercedes in the Arctic Circle.You can clearly see the influence of the new C-class design aesthetic at the front of this thinly-clad car; the new saloon's three-bar grille, trapezoidal clear lens headlights and raised bonnet centre line are all here. More surprising, though, is how little the three-door Benz appears to have been updated elsewhere. The disguise is covering a more defined shoulder line than the current car has, and it’s sure to be concealing various detail changes around the car too, but when viewed from behind, you might not know this C-class coupe had even been updated at all.Mercedes has been silent on when it'll show the finished C-class Sports Coupe, just as it has with the C-class Estate. With a domestic motor show in Frankfurt coming in the autumn, it's a strong possibility that the covers could come off either or both of them then. However, there's also a high-profile motor show in New York in April, and considering that the smallest C-class' has a strong following in the US, an American unveiling in the spring might be too tempting for Stuttgart to resist.