GMC Yukon XL (2015) is 551 mm (21.69 inch) longer, 47 mm (1.85 inch) wider, 40 mm (1.57 inch) higher and has 1492 liters (52.69 ft3) bigger cargo space than Mercedes GL-Class (2017).
Mercedes GL-Class (2017) is 3107 kg (6,850 lbs) lighter than GMC Yukon XL (2015).