Yep, that one. Discovered it on a Golf IV, Golf VI, Passat, had it on an Altea (this one with sunroof) and missing it badly. On Leon was a quick trip to parts department and ordering one... don't know why but sometimes came and others not is a handy and convenient way of storing sunglasses when you don't carry them (or a backup set of prescription glasses).
Does the Formentor have a small compartment on the left side of the wheel? I used that for sunglasses. Not as cool as the one in the roof, but it worked just fine.