Does anyone happen to know how the X5 decides if the glass tailgate is open or closed? It seems like mine thinks the tailgate is always closed, even when it is open. The boot lights don't work (bulbs are fine), the lower tailgate is disabled, and the dash warning doesn't get activated to tell me that the tailgate is open when driving with it open (just for testing purposes of course). I can't find a switch anywhere for it.
Thanks.