How to Replace the Third Brake Light on a 1998 Mercedes Benz E320
1. Open the trunk hood on your E320.
2. Locate the wires secured to the underside of the trunk lid. Follow the wires, which lead to the light socket directly behind the third brake light lens.
3. Turn the socket counterclockwise a quarter turn, and pull it out of the trunk lid.
4. Pull the bulb out of the socket, and push the new bulb into the socket.
5. Place the socket into the trunk lid, and turn it a quarter turn clockwise. Close the trunk lid.