Cadillac CTS-V (2014) is 567 mm (22.32 inch) longer, 62 mm (2.44 inch) wider, 22 mm (0.87 inch) higher and has 47 liters (1.66 ft3) bigger cargo space than Mercedes A-Class (2015).
Mercedes A-Class (2015) is 512 kg (1,129 lbs) lighter than Cadillac CTS-V (2014).