To get on the third seat, it is necessary to combine a back of the back seat which was before it and to shift this seat forward, having pulled a rychazhok or having pressed a pedal. To return a back seat on the place, pull it back, yet will not hear the click, testifying that the seat is fixed.
Prevention
When you return a back seat in a starting position, do not pull it for the thongs intended for folding of a seat.