The all-new Mercedes C-Class Coupe is on its way, and according to recent sources, it's slated to make its big debut in December 2015. The high-powered luxury model has quite the following across the globe and many are waiting for it to make its mark on the automotive market. The cabrio variant could also end up debuting at the same time as the C-Class Coupe, which would give fans a glimpse of both brand-new models.