Arrangement of a vehicle interior

The assembly has a fixing and adjusting device for fixing a seat (3) on a support e.g. support seat (2) or wheelhouse, and for adjusting position of the seat with respect to the support. A squeeze unit is fixed on a lateral surface of a base of the seat. The squeeze unit is cooperated with a detachable receiving unit fixed on the support. The receiving unit allows removability of the seat with respect to the support. The seat has a leg to cooperate with a unique slider (32) fixed on a floor pan of a motor vehicle in many positions.