GMC Sierra 2500HD (2014) is 1423 mm (56.02 inch) longer, 252 mm (9.92 inch) wider, 536 mm (21.10 inch) higher and has 1377 liters (48.63 ft3) bigger cargo space than Mercedes A-Class (2014).
Mercedes A-Class (2014) is 1523 kg (3,358 lbs) lighter than GMC Sierra 2500HD (2014).