the owner's manual is difficult, because I've tried today. Inserting a flat head into the small opening of the black plastic trim and pulling out is not as easy as it looks, because apparently I think there is a screw at the bottom of the fog light black plastic trim. I was pulling pretty hard but I didn't want to pull too hard so I checked and the black plastic piece is apparently screwed to something under. I've looked through the forum and someone suggested loosen the "compression screw?" I can't remember entirely. If I do have a chance to mess with the fog light again I will post a tutorial when I get the chance.
I find replacing the fog light bulb through the fender lining is a bit tricky since not all of us could fit our hand through the opening.