Sequence of works
1. Remove the bumper.
2. Remove the trim around the headlamp as described in the "Electrical equipment" section.
3. Remove the headlight.
4. Remove the side turn signal.
5. Remove the decorative panel, prying it off with a suitable tool if necessary.
6. Unscrew the bolts from the lower edge of the wing (two near the door, two near the bumper).
7. Open the front door and unscrew the bolts on the front pillar.
8. Remove the fender liner.
Fig. 11.9. Under the decorative panel there are two bolts (arrows) for fastening the wing
9. Loosen the bolts along the upper edge of the wing and remove the wing (Fig. 11.9).
10. If necessary, remove rust from the contact edges of the wing and body. Treat with a special zinc compound and paint after drying.
11. Before attaching the wing, it must be set correctly in height. To do this, close the hood and adjust the position of the wing. When installing, use a new sealing gasket.
[Material borrowed from an online resource: mercedesman]