Audi R8 (2015) is 45 mm (1.77 inch) wider and 510 kg (1,124 lbs) lighter than Mercedes S-Class (2017).
Mercedes S-Class (2017) is 800 mm (31.50 inch) longer, 245 mm (9.65 inch) higher and has 401 liters (14.16 ft3) bigger cargo space than Audi R8 (2015).