A seat assembly for a motor vehicle is shown. The assembly comprises a lower rail secured to a floor of the vehicle; an upper rail slidably engaged with the lower rail; a base structure secured to the upper rail to move therewith; a seat cushion held by the base structure in a manner to pivot between a horizontal operative position and an upright inoperative position; a seat slide latching mechanism for latching the upper rail to the lower rail; a seat cushion latching mechanism for latching the seat cushion at both the horizontal operative and upright inoperative postions relative to the base structure; a latch cancelling mechanism incorporated with the seat cushion latching mechanism for cancelling the latched condition of the seat cushion when actuated; and a restraining mechanism incorporated with the latch cancelling mechanism. The restraining mechanism latches the upper rail to the lower rail when the latch cancelling mechanism is being actuated.