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    
Bookmark and Share

Pelican Technical Article:

Rear Door Lock Replacement

Steve Vernon

Time:

2 hours2 hrs

Tab:

$60

Talent:

**

Tools:

Phillips screwdriver, trim removal tool, needle-nose pliers, 10mm, 8mm socket

Applicable Models:

Mercedes-Benz W124 (1986-95)

Parts Required:

Vacuum element

Hot Tip:

Door panels are expensive, take your time

Performance Gain:

Doors that work

Complementary Modification:

Replace switches

This article will show you how to replace your rear door lock vacuum mechanism. To perform this work you will need to first remove the door panels. Please see our article on rear door panel removal for additional assistance.

Before you begin you should park the car on as level ground as possible. Nothing is more frustrating than working on the door while it is swinging. Begin by rolling the window all the way up, into the closed position.

With the door panel removed, you'll see the plastic moisture barrier (red arrow) on the door closes to the lock.
Figure 1

With the door panel removed, you'll see the plastic moisture barrier (red arrow) on the door closes to the lock. The idea is to peel it off in just a way so that it can be glued back onto the door later. You do not need to pull it all off just start around the lock and give yourself enough room so you can remove the mechanism through the access hole in the bottom (yellow arrow).

Using your needle nose pliers, remove the clip that connects the rod from the vacuum unit to the rest of the lock actuator rods (red arrow).
Figure 2

Using your needle nose pliers, remove the clip that connects the rod from the vacuum unit to the rest of the lock actuator rods (red arrow).

With the clip removed you can separate the rods from the hinge (red arrow).
Figure 3

With the clip removed you can separate the rods from the hinge (red arrow). This will free up the vacuum element rod so it can be removed as part of the unit.

Use your 8mm socket to unscrew the two bolts (yellow arrows) that hold the element to the door frame.
Figure 4

Use your 8mm socket to unscrew the two bolts (yellow arrows) that hold the element to the door frame. Once those are off, use your Phillips head screwdriver to remove the screw (red arrow) that holds the plastic protective unit to the door.

Reach in and remove the plastic protective piece; use care as all the edges of the door are very sharp.
Figure 5

Reach in and remove the plastic protective piece; use care as all the edges of the door are very sharp.

Remove the vacuum line (red arrow) from the base of the lock while the mechanism is still in the door.
Figure 6

Remove the vacuum line (red arrow) from the base of the lock while the mechanism is still in the door. The nipple just pulls off of the unit. Then lower the unit out through the access hole in the bottom of the door.

This photo illustrates the unit out of the door.
Figure 7

This photo illustrates the unit out of the door. You can see the clip the vacuum line sits in on the lower part of the unit (red arrow); you will need to connect this once the new unit is installed. The connecting rod sits in the top of the unit (yellow arrow). You should measure its height and then unscrew it and transfer it to your replacement unit, screwing it in to approximately the same height as the unit you took it from. Installation is the reverse of removal.

Bookmark and Share

  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 12/2/2016 02:41:53 AM