Version 2:
The CLC is a four-door coupé based on the Mercedes C-Class - a sort of halfway house between the C-Class saloon and the C-Class Coupé. The name follows Merc's new naming scheme - a 'CL' prefix signifies a four-door coupé, and the 'C' suffix represents the size class of the car.
Couldn't decide which window-line I preferred so I thought I'd post both versions and let you decide.