Kia Optima Sportswagon (2018) is 754 kg (1,662 lbs) lighter than Mercedes GL-Class (2017).
Mercedes GL-Class (2017) is 291 mm (11.46 inch) longer, 138 mm (5.43 inch) wider, 380 mm (14.96 inch) higher and has 240 liters (8.48 ft3) bigger cargo space than Kia Optima Sportswagon (2018).