How to Change a Headlight on a Mercedes

1. Open the hood and look down onto the top of the headlamp to be repaired.
2. Unplug the electrical connector at the back of the headlamp by firmly grasping it by hand and wiggling it loose.
3. Grasp the bulb holder at the back of the lamp housing and turn a quarter to a half turn counter-clockwise and pull it out of the housing.
4. Remove the bulb from the holder by turning the bulb a quarter turn counter-clockwise and removing it from the bulb holder.
5. Install the new bulb into the bulb holder by pushing it in and turning it a quarter turn clock-wise.
6. Reinsert the bulb holder into the lamp housing and tighten by turning a quarter to a half turn until the bulb holder clicks into place.
7. Plug the electrical connector into the receptacle at the back of the lamp housing.
8. Turn on the headlights in the car to check for proper operations. Sometimes it is necessary to replace both lamps to achieve a balanced light distribution.