Abstract: A device for holding a motor vehicle door in an ajar position during the manufacture of the vehicle, including: a body; fastening means designed to fasten the body to the door, preferably to a fastening area intended to accommodate a lock; a retaining member mounted on the body and arranged to bear on a first side of the car body member and hold the door in an ajar position; and a stop member mounted on the body and arranged to extend away from the door in such a way as to define a space between the stop member and the door, the stop member being arranged to bear on a second side of the car body member and prevent the door from closing.

Abstract: An interface is intended to be fixed to a first rim edge of an opening element or of a fixed element of a motor vehicle body in order to protect a retaining portion of a device for temporarily closing the opening element on the fixed element provided in order to carry out the steps of painting the motor vehicle from contact with the rim edge. The interface has a portion in the general shape of a cage intended to house the temporary closing device. A kit including the interface and the temporary closing device is also described.