Covering assembly of a portion of the passenger compartment of an automobile including a plurality of covering parts

The assembly has a structural part (2) and two covering parts (20), where one of the covering parts is fixed to a portion (10) of the structural part. The other covering part includes a face that extends between two edges. An intermediate covering part (30) is fixed on the structural part, and extends between the two covering parts. The intermediate covering part comprises a moving element that moves the former covering part by applying pressure on an edge (24) of a face side (22) of the former covering part against an edge face (34) of the intermediate covering part.