GMC Sierra 2500HD (2020) is 1690 mm (66.54 inch) longer, 298 mm (11.73 inch) wider, 591 mm (23.27 inch) higher and has 1386 liters (48.95 ft3) bigger cargo space than Mercedes A-Class (2014).
Mercedes A-Class (2014) is 1374 kg (3,029 lbs) lighter than GMC Sierra 2500HD (2020).