How to Change a Front Marker Lamp in a Mercedes C230

1. Turn the C230's headlight switch to '0.' Turn off the engine and open the hood. Inspect the area behind the front lighting case. Find the black front marker lamp access cover. It is the outboard cover, closest to the fender on either side.
2. Grasp the access cover handle and turn it counterclockwise to unscrew the cover. Attached to the other side of the cover, you'll find the front marker lamp. The cover doubles as the socket.
3. Pull the lamp straight out of its socket. Put on clean gloves and open the replacement lamp package. Insert it straight into the socket.
4. Attach the access cover/socket back against the rear side of the lighting case. Turn the cover clockwise to reattach it to the case. Close the car's hood.