Kia Optima (2018) is 1020 kg (2,249 lbs) lighter than Mercedes GL-Class (2020).
Mercedes GL-Class (2020) is 291 mm (11.46 inch) longer, 138 mm (5.43 inch) wider, 380 mm (14.96 inch) higher and has 170 liters (6.00 ft3) bigger cargo space than Kia Optima (2018).