You probably know all about the Unimog by now, and that Mercedes-Benz's weird mashup of tractor and truck can do it all. With a little customization, the Unimog can do almost any task. Plow a field?

If there's one thing we've learned, when you get the chance to drive a Tonka Toy, do it--and that's exactly what we did when the people at Unimog offered us a drive opportunity in a 2005 U500. Looking ...