BMW 4 Series (2014) is 635 kg (1,400 lbs) lighter than Mercedes CL-Class (2014).
Mercedes CL-Class (2014) is 457 mm (17.99 inch) longer, 47 mm (1.85 inch) wider, 55 mm (2.17 inch) higher and has 45 liters (1.59 ft3) bigger cargo space than BMW 4 Series (2014).