i can see a little tab which it looks like it snaps onto but it's still flimsy at the front edge against the window, as if some pads or sticky material is meant to go there, maybe i'm missing something and never noticed?
tempted to just whack a load of bonding around the lip of the housing to fix it against the window
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306 rallye reproduction decals (full sets/individual decals) | 306 b-pillar textured vinyl weatherstrips306 slam panel esso stickers | 306 yellow / orange / pension fund red side door badges
gti6 inlet manifold badges | 306 rear boot badges (p2/p3)
winner of Extraction of toys from prams with outstanding vigour award 2009 [source: gti6 owners club]