GMC Sierra 3500HD (2017) is 820 mm (32.28 inch) longer, 579 mm (22.80 inch) higher and has 1451 liters (51.24 ft3) bigger cargo space than Mercedes E-Class (2018).
Mercedes E-Class (2018) is 36 mm (1.42 inch) wider and 891 kg (1,964 lbs) lighter than GMC Sierra 3500HD (2017).