GMC Sierra 3500HD (2017) is 1069 mm (42.09 inch) longer, 257 mm (10.12 inch) wider, 539 mm (21.22 inch) higher and has 1521 liters (53.71 ft3) bigger cargo space than Mercedes CLA-Class (2015).
Mercedes CLA-Class (2015) is 1229 kg (2,709 lbs) lighter than GMC Sierra 3500HD (2017).