Versus the outgoing GLK the GLC has grown in significant areas, probably more a result of the GLA's existence then representing segment demands...
Next to the GLK, the GLC is 4.7 inches longer, 2.0 inches wider, and 0.3 inch taller. It rides on a wheelbase stretched by 4.6 inches, while the tracks are up by nearly two inches in front and 0.8 inch in back.