A trim element having a wire element and a guiding device. A mobile portion of the wire element moves between a deployed position, wherein the mobile portion extends along a first path, and a retracted position, wherein the mobile portion extends along a second path. The guiding device includes a guide surface, with the mobile portion being separated from the guide surface in the deployed position and matching the shape of the guide surface in the retracted position. The guiding device has a constraint element movable between a separated position and a constraint position, wherein the constraint element moves the mobile portion toward the guide surface.