I replaced my front fender with a junkyard one that I was lucky enough to find with the correct color. I started by opening the hood and removing all bolts (I have a 84' 300D it has 7 bolts) from the "lip" that wraps from the fender under the hood. If I remember right (it was three years ago) the trim piece at the bottom of the fender near the door had to be removed to expose two more bolts, mine were rusted and were a bit of a pain to get off. I think there were screws connecting the fender to the front valance or what ever the metal piece is called which runs across the front of the car under the bumper. I don't remember if there was anything to remove associated with the headlight.

hope this helps,

Mike