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 Latch Replacement

Nick Czerula

Time:

3 hours3 hrs

Tab:

$200

Talent:

***

Tools:

Plastic prying tool, Door panel clip tool, flathead screwdriver, T20, T30 Torx driver

Applicable Models:

Mercedes-Benz E320 (2003-09)
Mercedes-Benz E500 (2003-06)
Mercedes-Benz E55 AMG (2003-06)

Parts Required:

Door panel, Vapor barrier, Vapor barrier seal, door panel clips

Hot Tip:

Do not tear door vapor barrier

Performance Gain:

Proper door latch and power lock function

Complementary Modification:

Clean and lubricate door latches on other doors

Central locking in Mercedes-Benz W211 models controls door locks, trunk lid or luggage compartment lock and fuel filler flap lock. The electronic functions of central locking are spread out over several door control modules, with sensors and actuators connected directly to a control module in the vicinity of their installed location. The rear electronic (SAM) module is the master control module for central locking.

The lock mechanism in each door consists of a latch, an exterior door handle and an inside door lock release handle. Only the driver door (left front in North America) is equipped with a lock cylinder. The exterior door latch is responsible for locking, unlocking and latching the door shut. The latch itself is pretty reliable. However, having the electronic lock solenoid integrated in the latch creates some problems. The lock solenoids fail over time, leaving you with a malfunctioning lock. If it is the driver lock, you can still lock and unlock with the key. With other kinds of doors, you may not be so lucky. If you are having a problem with the lock, try cleaning and lubricating the latch. I find this will restore function of the lock from time to time. If I can successfully restore function this way, I still replace the latch to avoid future problems. It is a good test to see if the problem is electrical or mechanical.

Keep in mind that when your car was serviced before, parts may have been replaced with different size fasteners used in the replacement. 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.

Protect your eyes, hands and body from fluids, dust and debris while working on your vehicle. If you're working with the electrical system, disconnect the battery before beginning. Always catch fluids in appropriate containers and properly dispose of any fluid waste. Recycle parts, packaging and fluids when possible. Never work on your vehicle if you feel the task is beyond your ability.

Our vehicle may vary slightly from yours as models do change and evolve, as they grow older. If something seems different, let us know and share your info to help other users. Do you have questions or want to add to the article? Leave a comment below. When leaving a comment, please leave your vehicle information.

Remove the rear door panel. See our tech article on rear door panel removing. Disconnect the battery. See our tech article on battery replacing. Let the vehicle sit for 15 minutes. You do not have to remove the window regulator like in the front door when replacing the door latch. However, you may find it easier to do so. If you would like to explore that option, see our tech article on window regulator replacing.

Working at the side airbag, disconnect the electrical connector by pulling it straight out.
Figure 1

Working at the side airbag, disconnect the electrical connector by pulling it straight out.

Slowly peel the vapor barrier off the door.
Figure 2

Slowly peel the vapor barrier off the door. Be careful not to tear the barrier while removing it. If the vapor barrier tears (green arrow), replace it. The red arrow points to the butyl seal you are separating from the door.

Peel the vapor barrier (green arrow) off the door until you can see the window motor (red arrow).
Figure 3

Peel the vapor barrier (green arrow) off the door until you can see the window motor (red arrow).

Looking inside the door toward the latch, you can see the latch (yellow arrow), door support (red arrow) and the door handle release bracket (green arrow).
Figure 4

Looking inside the door toward the latch, you can see the latch (yellow arrow), door support (red arrow) and the door handle release bracket (green arrow). To remove the latch you will have to remove the door support and the exterior door handle and release bracket. See our tech article on rear door handle removing.

Working at the outer edge of the door, peel the tape (green arrow) away from the door to expose the door support retaining tabs (red arrows).
Figure 5

Working at the outer edge of the door, peel the tape (green arrow) away from the door to expose the door support retaining tabs (red arrows). Be sure to replace this piece of tape when reinstalling. Press the release tabs while reaching inside the door and rotate the door support clockwise (when facing interior of door).

Remove the door support from the door.
Figure 6

Remove the door support from the door.

Remove the exterior door handle and release bracket.
Figure 7

Remove the exterior door handle and release bracket. See our tech article on rear door handle removing.

Next, you have to detach the wiring harness (red arrows) from the door.
Figure 8

Next, you have to detach the wiring harness (red arrows) from the door. Push the bottom of the retainer up (inset) and pull it out of the door. Then remove the entire clip with the harness from the door.

Working at the outer edge of the door, remove the guard from the door latch.
Figure 9

Working at the outer edge of the door, remove the guard from the door latch. Press the retaining tabs (red arrows) in toward the guard and hold while pulling the guard out of the door.

Once detached, remove the guard (red arrow) from the door.
Figure 10

Once detached, remove the guard (red arrow) from the door.

Working at the door latch, remove the lock rod (red arrow).
Figure 11

Working at the door latch, remove the lock rod (red arrow). Feed the curved bottom portion of the rod out of the lever on the latch (green arrow).

Move to the door module.
Figure 12

Move to the door module. Disconnect the door latch electrical connector (green arrow) by pulling it straight out. Then feed the wiring harness through the door vapor barrier.

Remove the three T30 Torx door latch fasteners (red arrows).
Figure 13

Remove the three T30 Torx door latch fasteners (red arrows). Once the fasteners are removed, lift the latch slightly to detach the plastic tab (green arrow).

Then remove the door latch from the door by sliding it down and removing it at an angle through the opening in the door.
Figure 14

Then remove the door latch from the door by sliding it down and removing it at an angle through the opening in the door.

To install the new latch reverse the order of the steps.
Figure 15

To install the new latch reverse the order of the steps. Remember to check the function of the latch before installing the door panel. I suggest closing the latch with a flathead screwdriver (red arrow) while the door is open. Then open it using the cables once you've attached them. This will ensure it is working.



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: Mon 12/5/2016 02:44:01 AM