A step assembly of a motor vehicle is described which may have a vehicle-attached bearing assembly for connecting the step assembly to a vehicle body, a lowerable step, and actuating kinematics for the lowerable step, wherein the actuating kinematics comprise a link assembly in each of the two end portions of the lowerable step, each link assembly being displaceable by a drive link assembly between a retracted position, in which the lowerable step is in a lifted position, and an extended position, in which the lowerable step is in its lowered position. Trim parts which cover the link assemblies at least in the lifted position of the lowerable step may be disposed on the bearing assembly.