Buick LaCrosse (2015) is 591 mm (23.27 inch) longer and 23 mm (0.91 inch) wider than Mercedes GLA-Class (2018).
Mercedes GLA-Class (2018) is 107 mm (4.21 inch) higher, 141 kg (311 lbs) lighter and has 129 liters (4.56 ft3) bigger cargo space than Buick LaCrosse (2015).