BMW 3 Series (2015) is 315 kg (694 lbs) lighter than Mercedes E-Class (2014).
Mercedes E-Class (2014) is 255 mm (10.04 inch) longer, 44 mm (1.73 inch) wider, 14 mm (0.55 inch) higher and has 60 liters (2.12 ft3) bigger cargo space than BMW 3 Series (2015).