Audi A8 (2015) is 1131 mm (44.53 inch) longer, 132 mm (5.20 inch) wider, 168 mm (6.61 inch) higher and has 155 liters (5.47 ft3) bigger cargo space than Mercedes SLK-Class (2017).
Mercedes SLK-Class (2017) is 555 kg (1,224 lbs) lighter than Audi A8 (2015).