Along came the G. And then the GL. Now there’s also a GLK from Mercedes-Benz, and it is a good’un. Since it’s debut the Mercedes-Benz GLK350 has been a dominant sales force in an ever-more crowded segment; a segment which includes much more established players. Sales of the GLK350 4Matic were higher in October than in September while sales of its competitors fell. For a full rundown of the best-selling small luxury SUVs in America, scroll on down… scroll on down the page.