Also found this on another forum...

Hi Mate, I've got a x5 E70 2009 WITH OUT Xenons, if you ask the dealer for an exploded view diagram of the headlamp it shows you the location of the angel eye bulb (the diagram shows both the xenon and the non-xenon on the same diagram). But it doesn't list what type of bulb it is, just a part number. You'll will see a black rectanglier plastic cap in between the main and the dipped beam cover (at the back of the lamp, under the bonnet) held on by 3 or 4small screws. The bulb looks like a 501 sat in a small reflector but not sure, I'll be removing mine when the weather improves. The main beam is a H1, the dipped beam is a H7 and the fogs H11.