As another B15 SE owner , I'll save your ass from the search nazis....
There is a small , black screw on the bottom of the fixture . You need to unscrew it . There are two sets of white clips . You need to use a long , screwdriver to push them back , but do not break them off . There is a grey connector that is a pain to unclip , but a small screwdriver should do the trick . Then it's just a matter of jiggiling the whole light out itself . Remember to push back the white clips when re-installing the fog light . Good luck .
