This vehicle makes sense for Mercedes-Benz as the engineering costs are relatively low considering it will share the vast majority of its pieces with the W166 M-Class making for large profit margins. It can be viewed as taking the exact same thing and simply giving it a different body. That also means an MLC63 AMG is likely on the horizon as well along with MLC350, MLC450, and MLC550 models.
Whatever you may think of it, the crossover segment is hot and sells. Expect to see the MLC in 2014.