Mercedes-Benz Parts Catalog Mercedes-Benz Accessories Catalog Mercedes-Benz Technical Articles Mercedes-Benz Tech Forums
 
Follow Pelican Parts on Facebook Follow Pelican Parts on Twitter Follow Pelican Parts on Instagram Follow Pelican Parts on YouTube Follow Pelican Parts on Pinterest Follow Pelican Parts on Tumblr
  Search our site:    
View Recent Cars  |   Cart  | Project List | Order Status | Help    
 >  >
Headlight and Fog Light Replacement
 
Bookmark and Share

Pelican Technical Article:

Headlight and Fog Light Replacement

Steve Vernon

Time:

1 hour1 hr

Tab:

$15 to $160

Talent:

*

Tools:

Philips head screwdriver

Applicable Models:

Mercedes-Benz W123 (1977-85)

Parts Required:

Lights

Hot Tip:

Clean the contacts

Performance Gain:

See better at night

Complementary Modification:

Polish headlight surround

The European versions of the W123 come with headlights and fog lights that you can simply change the bulbs through the back of the unit while the US models come with sealed headlights and fog lights. People have made upgrade kits over the years to convert the sealed beam units to replaceable bulbs, so determine which you have before ordering replacement parts. You will need to remove the headlight surround and look at the back of the lamp to determine this. Make sure you take the time to check this before you order.

Over the years your car may have been serviced by multiple people including previous owners and this can lead to parts replaced with different size fasteners and hardware. The sizes of the nuts and bolts we give may be different from what you have so be prepared with different size sockets and wrenches. If something is different on your vehicle please let us know and share your info to help other users. If you have any questions or comments or even a different procedure you would like to share please leave it below and please leave your vehicle information.

The US market W123's come with a sealed headlight (red arrow) and a sealed fog light (yellow arrow), whether you have the sealed beams or the Euro version you will need to remove the front surround (blue arrow) to change the bulbs or lights.
Figure 1

The US market W123's come with a sealed headlight (red arrow) and a sealed fog light (yellow arrow), whether you have the sealed beams or the Euro version you will need to remove the front surround (blue arrow) to change the bulbs or lights.

Begin by reaching in behind the lights and completely unscrewing and removing the three plastic wheels on the rear of the housing (red arrows).
Figure 2

Begin by reaching in behind the lights and completely unscrewing and removing the three plastic wheels on the rear of the housing (red arrows).

Do not break or loose these as they are getting hard to replace.
Figure 3

Do not break or loose these as they are getting hard to replace.

With the three wheels removed, you can pull the surround forward and off the chassis.
Figure 4

With the three wheels removed, you can pull the surround forward and off the chassis.

You can now access the Philips head screws that hold the headlight and fog light rings and lamps in place.
Figure 5

You can now access the Philips head screws that hold the headlight and fog light rings and lamps in place. There are three for the headlight (red arrows) and two for the fog light (yellow arrow). Loosen the screws on the lamp you want to replace.

With the screws loosened, slip the retaining ring and lamp out from the assembly.
Figure 6

With the screws loosened, slip the retaining ring and lamp out from the assembly.

The headlight and fog light are both held in the retaining rings by the metal clips on the rings.
Figure 7

The headlight and fog light are both held in the retaining rings by the metal clips on the rings.

To replace the fog light, loosen the two screws and slip the ring and lamp from the assembly.
Figure 8

To replace the fog light, loosen the two screws and slip the ring and lamp from the assembly.

Pull back the rubber protective cover and disconnect the two wiring connections (red arrows).
Figure 9

Pull back the rubber protective cover and disconnect the two wiring connections (red arrows). Installation is the reverse of removal.

You can use the four plastic knobs on the rear of the housing to aim the lights.
Figure 10

You can use the four plastic knobs on the rear of the housing to aim the lights. Adjuster 1 adjusts the headlight height, adjuster 2 adjusts the headlight lateral adjustment, adjuster 3 adjusts the lateral adjustment of the fog light and adjuster 4 adjusts the height of the fog light. While you should have your lights professionally aimed, a good rule of thumb is to park you vehicle approximately 15 feet away from a flat white wall, measure the height to the center of your headlight and mark this on the wall, with high beams on the light should not project above this point on the wall.

Bookmark and Share
Comments and Suggestions:
gracemoody Comments: What I need is the yellow lens cover for the driver's side of a 191 Merc 350 SDLturbo.
June 1, 2016
  Followup from the Pelican Staff: Give The Pelican Parts parts specialists a call at 1-888-280-7799. They can figure out what part or repair kit you need. - Nick at Pelican Parts  

  Search our site:    

View Cart & CheckOut | Project List | Order Status |  Help    

 

[Home] [Customer Service] [Shopping Cart] [Project/Wish List]
  [Privacy Statement]  [Contact Us] [About Us] [Shipping] [Careers]

Copyright © Pelican Parts Inc. -    DMCA Registered Agent Contact Page

Page last updated: Fri 12/9/2016 03:00:18 AM