The GLK350 is Mercedes' fully-revised offering in the premium midsize SUV segment. It's not quite as refined as the larger M- and GL-Class vehicles, but offers a relatively sporty drive and excellent build quality for the money with a base price considerably less than comparably equipped competition.
The GLK250 BlueTec 4Matic is Mercedes' diesel-powered offering in the entry-level luxury SUV segment. With just a 2.1-liter four-cylinder, it's considerably slower than the gasoline GLK350. Though not quick, it's an easy-driving and confident-handling machine with excellent fuel economy for the money.