I do have some roof rack options for a 2019 Mercedes-Benz A-Class but there are none from Thule currently. Furthermore, the old Thule square bars are discontinued so there is no way to reuse them on another vehicle. Instead, I recommend the Yakima JetStream Crossbar System composed of part # Y00425, part # Y28TR, and part # Y06146. This is an aero bar system which will provide the least wind noise and is compatible with the most amount of rooftop mounted accessories. view full answer...