Abstract: A seatback latch mechanism includes a cover. A lever member is rotatably supported by the cover for rotation about a lever axis, and presents a blocking surface. A hook member is rotatably supported by the cover for rotation about a hook axis, and includes a pin. An auxiliary hook member is rotatably supported by the cover for rotation about the hook axis. The auxiliary hook member defines a slot, with the pin extending through the slot. The slot limits movement of the pin to limit relative movement between the hook member and the auxiliary hook member. The auxiliary hook member includes a blocking portion, which is operable to engage the blocking surface on the lever member. The blocking portion engages the blocking surface to limit rotation of the auxiliary hook member about the hook axis.