Mercedes-Benz is planning to add yet another SUV to its lineup soon. The German carmaker has been testing the SUV in Europe and a camouflaged boxy-looking test mule was spotted recently for the first time. According to the international press, Mercedes-Benz had filed a trademark for the ‘GLB’ name recently. Going by Mercedes’ latest nomenclature system, the new SUV will slot in between the GLA and the GLC.