Motor vehicle front unit assembly including means for adjusting the positions of the light units, an adjustment tool for this purpose, and a method of assembling such a front unit

A motor vehicle front unit assembly comprising a front face, which presents a central portion and two side portions, a bumper skin, two flexible brackets extending laterally and forming supports for the bumper skin, each having a first end connected to the central portion and a second end for connection to the front portion of a corresponding vehicle bodywork fender, and two light units, each rigidly secured to a respective one of the brackets,

• the assembly further comprising pre-positioning and guide means connecting the first end of each bracket to the central portion, which means are adapted to provide pre-positioning that enables said first end to be moved in a substantially axial direction relative to the front face, and means for locking said first end in position relative to the front face;
• said pre-positioning and guide means comprising drive means for driving the first end axially in translation relative to the front face, said means operating by meshing, and means for releasably receiving an adjustment tool in a position where it meshes with said drive means;
• whereby, when the first end is pre-positioned but not locked in position, actuating the adjustment tool causes the first end to move axially relative to the front face, thereby adjusting the position of the light unit and of the bumper skin relative to the hood.