How do you replace the fog lamp lens on a 1996 Mercedes E320?
Right under the chin of the car, find the black plastic door. There are two twist locks to open it. Once inside, use a nutdriver to pull out the single screw. The whole housing assembly will slide back and down. It may be a tight fit, but it does come apart if you tug on it. Once you have that out, you will see the clips hold the scraps of the old lens. Pry these off, and clip the new lens into place. Then just reverse steps to re-install.