Its described here http://s14.zetaboards.com/mercedes_190_club/topic/219911/1/ you will have to register on the forum to see the pictures/How to The lens is held on with plastic clips and a frame---be very careful not break these since they can be fragile thro age. It obvious once you have removed the headlight unit from the car. The worst bolt is a long one under the light since its usually very rusty---it threads into a plastic clip that fits in the square metal holed tab along the bottom of the body opening for the headlight---- you can see it in the pics quite clearly--- the square hole that is