A seat for a motor vehicle, includes a backrest part and a seat part. The backrest part is configured to fold relative to the seat part from a normal position into a folded position and vice-versa. A lower seat structure is included and the seat is configured to move relative to the lower seat structure. At least one front first fastening, one rear second fastening and one diagonal fastening are provided to fasten the seat part to the lower seat structure. The seat is configured to adjust at least into an entry position and into a lowered position distinguishable from the normal position, and the second fastening is configured to release in the entry position. The diagonal fastening is configured to release in the lowered position.