Two SUVs with some similarities, but otherwise different in most aspects such as the model year, powertrain, starting price, ground shadow size, horsepower, height, and maximum occupancy. First of all, the 2013 Acura RDX is priced $29,280 lower compared to the base MSRP of the 2016 Mercedes-Benz GL-Class Diesel, which is newer by three model years. Also, the 2013 RDX has a more powerful engine than the 2016 GL-Class Diesel. In addition, not only RDX is significantly smaller, but it's also slightly shorter than the GL-Class Diesel. And then, you'll seat two more passengers in the Mercedes-Benz GL-Class Diesel than in the Acura RDX. Among similarities are the body structure, market segment, and fuel economy.