A motor vehicle luggage retention system for a motor vehicle is disclosed. A foldable seat back separates the occupant compartment from the trunk and has an upright position and a folded position that allows pass-through accessibility from the trunk into the occupant compartment. A pivotable bar assembly in the trunk has a lowered position and a raised position. Pivoting the pivotable bar assembly to the lowered position moves the foldable seat back to the upright position and creates a structural safety barrier against objects in the trunk impacting a rear surface of the seat back. Pivoting the pivotable bar assembly to the raised position moves the seat back to the folded position to provide uninterrupted access to the occupant compartment from the trunk. A latch assembly latches the pivotable bar assembly in at least the lowered position. A movable parcel shelf and collapsible storage bin are also disclosed.