Test Drive: Mercedes-Benz’s Spacious New 2020 GLS

Family-friendly looks are deceptive considering this SUV's highly adventurous capabilities

When imagining a summer of freedom, a road trip to a faraway beach or remote mountain getaway is likely on the list. And, if you want to bring along a passel of friends and family, the 2020 Mercedes-Benz GLS would be a clever idea. The GLS is the carmaker’s new full-size, three-row model—an update on the previous GL. It weighs some 5,500 pounds and fits …