I've just gone out and bought myself a second-hand XF and it's splendid. Just one question from a beginner to all you experts: is there a way of unbuckling the centre seat belt so that when you put the rear seats down, it doesn't get in the way of the load? It looks for all the world like the belt is designed to retract into the parcel shelf, but there's no button on the D-loop. Any ideas? Is it obvious and I'm too much of an old fogey?