When the 2007 Mercedes-Benz GL-Class arrives, it will take on the redesigned 2007 Cadillac Escalade, and will duke it out with a larger, all-new BMW X5. Based on BMW’s polarizing design themes, our initial driving impressions of the M-Class, and what we know about the Escalade, it looks like Mercedes is neatly positioned to grab more market share with the new GL-Class.