Audi R8 (2015) is 62 mm (2.44 inch) wider and 140 kg (309 lbs) lighter than Mercedes CLS-Class (2018).
Mercedes CLS-Class (2018) is 495 mm (19.49 inch) longer, 172 mm (6.77 inch) higher and has 421 liters (14.87 ft3) bigger cargo space than Audi R8 (2015).