I am reporting a design defect in the VW Atlas second row bench. There is no sensor or warning for the driver when the bench seat is not secure. When the car came to a stop from a low speed, the bench fell forward with enough force to fracture my child's leg who was sitting secure in a child's car seat. We reported the design problem to the manufacturer. The vehicle manufacturer inspected the vehicle for a manufacturing defect, not a design defect. When asked to pursue an inspection on design defect, the manufacturer noted they would and did not. This problem is replicable. Our concern is that the car does not alert the driver that the bench is not secure. Our incident could have been avoided if there was a driver warning.