BMW 1 Series (2015) is 65 kg (143 lbs) lighter than Mercedes C-Class (2020).
Mercedes C-Class (2020) is 357 mm (14.06 inch) longer, 45 mm (1.77 inch) wider, 21 mm (0.83 inch) higher and has 120 liters (4.24 ft3) bigger cargo space than BMW 1 Series (2015).