Mercedes GLC-Class (2017) is 1961 mm (77.20 inch) longer, 227 mm (8.94 inch) wider, 104 mm (4.09 inch) higher and has 160 liters (5.65 ft3) bigger cargo space than Smart Fortwo (2014).
Smart Fortwo (2014) is 1150 kg (2,535 lbs) lighter than Mercedes GLC-Class (2017).