GMC Sierra 2500HD (2014) is 620 mm (24.41 inch) longer, 160 mm (6.30 inch) wider, 552 mm (21.73 inch) higher and has 1228 liters (43.37 ft3) bigger cargo space than Mercedes CL-Class (2018).
Mercedes CL-Class (2018) is 698 kg (1,539 lbs) lighter than GMC Sierra 2500HD (2014).