You need to remove the hinge rail cover, shown in the pic I've attached. It is a compression type fit. CAREFULLY pry underneath it starting at the front to get it to "roll" out of the channel. Once you remove that you will find the screws underneath. Remove the screws from the front to about 1/2 way back to the next compartment door. Once the screws are removed you will need to carefully pry the hinge rail away from the coach starting at the front. Slide the fender forward off the hinge rail. I cant tell if that light is just a reflector or marker light, but make sure to unwire it or cut it leaving enough wire to reconnect when your fender repairs are done.
94-Newmar Kountry Star 40-KSDP
Spartan/Cummins 8.3C-300HP/Allison 3060 WTEC-II/25yr RV Tech RVIA Certified/Onan-Cummins Certified