Audi A8 (2014) is 1003 mm (39.49 inch) longer, 131 mm (5.16 inch) wider, 157 mm (6.18 inch) higher and has 39 liters (1.38 ft3) bigger cargo space than Mercedes SLK-Class (2017).
Mercedes SLK-Class (2017) is 530 kg (1,168 lbs) lighter than Audi A8 (2014).