Fender Removal ???

[BMWX5CHI]

Hello everyone, I'm planning on restoring my headlights and properly sealing them afterwards, but I'm really a bit OCD about it and really wanted to remove the headlights to do it properly. (I know I can tape off edges and still do it but I don't want to do it that way.)So from what I've searched it looks like there is a lot of work involved to remove the headlights. Looks like that option is out of the question for me. So I want to remove both fenders so I can have some extra room to work with. I noticed there seems to be dirt building up under the headlight between the fender where it sits. (See Picture, Sorry for jacking the pic of someone's E70 I'm just using it for reference.) I Also noticed that water tends to stay under there. Since I'm really picky about it, I said well since I can't remove the headlights, I can try the fenders. That will leave me with enough room to work freely. So how do I remove the fenders? Google leaves me with nothing and I cant seem to find nothing here. Any help will be truly appreciated. Thanks.