GMC Sierra 3500HD (2018) is 1306 mm (51.42 inch) longer, 249 mm (9.80 inch) wider, 420 mm (16.54 inch) higher and has 1505 liters (53.15 ft3) bigger cargo space than Mercedes B-Class (2017).
Mercedes B-Class (2017) is 1320 kg (2,910 lbs) lighter than GMC Sierra 3500HD (2018).