Mazda 6 Atenza (2014) is 100 mm (3.94 inch) higher, 171 kg (377 lbs) lighter and has 27 liters (0.95 ft3) bigger cargo space than Mercedes C-Class (2015).
Mercedes C-Class (2015) is 411 mm (16.18 inch) longer and 42 mm (1.65 inch) wider than Mazda 6 Atenza (2014).