BMW 1 Series (2015) is 4 mm (0.16 inch) higher and 395 kg (871 lbs) lighter than Mercedes CLS-Class (2014).
Mercedes CLS-Class (2014) is 611 mm (24.06 inch) longer, 117 mm (4.61 inch) wider and has 160 liters (5.65 ft3) bigger cargo space than BMW 1 Series (2015).