All that seems to separate the Vision GLK from the spied vehicle are its 20-inch wheels the concept's off-color cladding that we can only hope won't be a production feature -- even GM has given that up. The vehicle is powered by a 170-horsepower, 2.2-liter four-cylinder diesel engine featuring the automaker's Bluetec emissions-reducing technology.

When the production GLK arrives, it will reportedly come with two gas engine options, both of which are available on the C-Class (the vehicle is said to be based on a C-Class wagon), a 228-horspower 3.0-liter and a 268-horsepower 3.5-liter V-6. A diesel option along the lines of what powers the concept will likely arrive later, although no official announcement has been made. Mercedes claims the five-passenger SUV will be as off-road capable as its ML-Class, thanks largely to a new 4matic all-wheel-drive system.

mercedes-benz vision glk freeside

mercedes-benz vision glk freeside

mercedes-benz vision glk freeside