BMW 1 Series (2015) is 12 mm (0.47 inch) higher, 170 kg (375 lbs) lighter and has 4 liters (0.14 ft3) bigger cargo space than Mercedes C-Class (Coupe) (2017).
Mercedes C-Class (Coupe) (2017) is 357 mm (14.06 inch) longer and 45 mm (1.77 inch) wider than BMW 1 Series (2015).