How do you remove the headlight assembly in a Lucerne?

I need to remove the headlight assembly to replace a bulb, but after removing two upper bolts and one lower bolt, the thing seems immovable. Is there another bolt I can not see? Any help would be appreciated. There is nothing in the manual to tell how to do this.How do you remove the headlight assembly in a Lucerne?99 percent of all vehicles do not require the removal of the headlight to replace the bulb.....instead you remove what is blocking the bulb from the backside and then replace the bulb.......