There are a couple of different options available to the Mercedes Benz car owner when a headlight goes out. Obviously, the local dealership can take care of the problem, but this is probably the most expensive choice. The preferred option would be to purchase the replacement bulb from the local parts store and perform the task in the privacy of the garage. Only the bulb need be replaced, the entire lamp assembly does not need to be removed.
Open the bonnet and look down onto the top of the headlamp to be repaired.
Unplug the electrical connector at the back of the headlamp by firmly grasping it by hand and wiggling it loose.
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.
Remove the bulb from the holder by turning the bulb a quarter turn counter-clockwise and removing it from the bulb holder.
Install the new bulb into the bulb holder by pushing it in and turning it a quarter turn clockwise.
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.
Plug the electrical connector into the receptacle at the back of the lamp housing.
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.
Clean any dust or dirt that may have accumulated on the lamp holder before installing new lamp.
Do not attempt to replace the headlight lamp while the lights are turned on.