Luggage covering system for a motor vehicle

The system (1) has two reciprocal engaging units (15) arranged above and away from a track (14) to define a predetermined position of a locking flap for covering a luggage. The engaging units are encased between the projections when a support zone (13) is in contact with the projections by bringing a curtain in a deployed configuration to block the curtain the deployed configuration. The engaging units are uncoupled from each other by a force exerted on the flap against the engaging units to allow returning of the curtain towards a retracted configuration.