I picked up my new Q5 from the dealer the other week and the first thing that struck me was bloody hell they have forgotten to fit the tow bar! It is in fact completely concealed and so there is no indication that there is a tow bar when it is fully retracted. A lot of the retractable tow bars still have some of the bar or electrics on show, but the on the Q5 it?s a very tidy bit of kit. You remove a small panel in the rear valance, pull a handle in the boot and the tow bar swings out. Maybe it?s a little pricey, but its worth in my opinion.