Cadillac STS (2018) is 71 mm (2.80 inch) longer and 152 kg (335 lbs) lighter than Mercedes E-Class (Estate) (2017).
Mercedes E-Class (Estate) (2017) is 20 mm (0.79 inch) wider, 43 mm (1.69 inch) higher and has 282 liters (9.96 ft3) bigger cargo space than Cadillac STS (2018).