BMW 4 Series (2020) is 634 mm (24.96 inch) longer, 35 mm (1.38 inch) wider, 80 mm (3.15 inch) higher and has 105 liters (3.71 ft3) bigger cargo space than Mercedes SLK-Class (2014).
Mercedes SLK-Class (2014) is 145 kg (320 lbs) lighter than BMW 4 Series (2020).