How to Replace a Mercedes Headlight


1. Pop the hood and examine the back of the headlight. Use a screwdriver to remove the mounting bolts of the headlight.
2. Disconnect the wiring harness from the back of headlight. The red (or black) cylinder sticking out from the back of the headlight is the ballast/bulb mount. Turn this counterclockwise to remove the back of the mounting structure.
3. Disconnect the four inner clips holding the bulb in place and slide the bulb out. Slide the bulb into the new headlight and reconnect the four inner clips.
4. Press the ballast onto the back of the bulb and turn it clockwise to lock it in place. Reconnect the wiring harness, then remount the headlight with the mounting screws (if applicable).