Abstract: The invention relates to an inherently rigid instrument carrier assembly that is used as a structural or styling element, in particular in motor vehicles. Said assembly replaces the support mounts that conventionally run between support elements, such as the A-pillars of a motor vehicle. The inventive assembly comprises a molded part configured as an upper shell and a molded part configured as a lower shell, consisting of fibre-reinforced thermoplastic, which is formed, in particular in a deep-drawing process, into the structure of the upper shell and the lower shell, producing at least one respective reinforcement profile that extends in the longitudinal direction of the molded part, i.e. between the support elements. Said reinforcement profile comprises at least one respective substantially vertical strut and at least one tranversal limb extending transversally to said strut. The vertical struts of the shells in particular are used to connect the two molded parts, in particular by means of plastic welding.