There is a MOPF (Modellpflege = model update) due, but I couldn't find any summary of changes. You might like this link though:
http://www.mercedes-benz.de/content/germany/mpc/mpc_germany_website/de/home_mpc/passengercars/home/new_cars/models/c-class/w204.flash.html#chapter=1



There is an E-class coupe coming out:
http://www.mercedes-benz.de/content/germany/mpc/mpc_germany_website/de/home_mpc/passengercars/home/new_cars/models/e-class/c207.flash.html#chapter=1

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Prost!