Fourth generation (W177, 2018-present) · Premium family hatchback
The Mercedes-Benz A-Class has a bare roof, fitted with a clamp system, on most UK trims, as family hatches in this segment usually ship without rails. Compare the crossbars' dynamic load rating, not the static one: dynamic is what they carry while driving, and it is almost always the lower figure.
Three products we would look at first in this category. Fit for your Mercedes-Benz still comes first: check the compatibility list on the listing against your exact model and year, and read the model guide above.
SummitSUM-003 Roof Bars for Running Rails (1.35 m)
Semi-universal aluminium bars for cars with raised running rails.