Mercedes C-Class (2014) is 276 mm (10.87 inch) longer, 118 kg (260 lbs) lighter and has 45 liters (1.59 ft3) bigger cargo space than Mercedes GLA-Class (2017).
Mercedes GLA-Class (2017) is 24 mm (0.94 inch) wider and 169 mm (6.65 inch) higher than Mercedes C-Class (2014).