I installed the luggage compartment rails (T4K1345) and retention kit (C2Z31984). I trimmed the rubber mat (T4K1601), that came as part of the full rubber mat kit in the original car option list, to fit between the rails. The retention kit also has a strap retention (not pictured) that can be installed in the sliding anchors on one side or the other. It is not meant to be installed across the car like the telescopic rods (shown), but it will fit that way.
Also pictured is the bumper protector T2H1721,