BMW 6 Series Gran Turismo (2018) is 404 mm (15.91 inch) longer, 92 mm (3.62 inch) wider, 97 mm (3.82 inch) higher and has 129 liters (4.56 ft3) bigger cargo space than Mercedes C-Class (2016).
Mercedes C-Class (2016) is 350 kg (772 lbs) lighter than BMW 6 Series Gran Turismo (2018).