Buick LaCrosse (2018) is 607 mm (23.90 inch) longer and 33 mm (1.30 inch) wider than Mercedes GLA-Class (2017).
Mercedes GLA-Class (2017) is 150 mm (5.91 inch) higher, 20 kg (44 lbs) lighter and has 30 liters (1.06 ft3) bigger cargo space than Buick LaCrosse (2018).