GMC Sierra 2500HD (2020) is 887 mm (34.92 inch) longer, 206 mm (8.11 inch) wider, 607 mm (23.90 inch) higher and has 1237 liters (43.68 ft3) bigger cargo space than Mercedes CL-Class (2014).
Mercedes CL-Class (2014) is 549 kg (1,210 lbs) lighter than GMC Sierra 2500HD (2020).