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    
 >  >
Automatic Transmission Shift Module Replacement
 
Bookmark and Share

Pelican Technical Article:

Automatic Transmission Shift Module Replacement

Nick Czerula

Time:

3 hours3 hrs

Tab:

$200

Talent:

*****

Tools:

T25 Torx, 10mm socket, flathead screwdriver

Applicable Models:

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

Parts Required:

Selector module clip, selector module, linkage bushing

Hot Tip:

Use coat hanger to hold shift linkage in place

Performance Gain:

Remedy a faulty selector module

Complementary Modification:

Replace transmission fluid

The longitudinally installed Mercedes-Benz drivetrain came with a choice of 5, 6 or 7 speed automatic transmission. The transmission is computer controlled to provide smooth shifting, high fuel economy and good performance.

The shift selector module is an electronic shift or transmission range switch. It is monitored by the transmission control module, reporting the current gear, gear change requests and park or neutral. Due to location and frequency of use, this selector module fails over time. When it fails it can cause the transmission to miss shifts, remain in neutral or prevent the vehicle from starting (when park or neutral isn't seen). There are many fault codes associated with the module when it fails, so be sure to use a Mercedes-Benz scan tool to query the control module.

To gain access to the selector module, it is necessary to remove the center console. See our tech article on center console removing.

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. Do not work on your vehicle if you feel the task is beyond your ability.

Vehicle models change and evolve, as they grow older, so the vehicle shown in our illustrations may vary slightly from yours. 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.

In this article, I'll go over the steps involved with replacing the shift selector module on a Mercedes-Benz W211 4MATIC, other models are similar.

This photo shows the shift selector module (red arrow) with the center console removed.
Figure 1

This photo shows the shift selector module (red arrow) with the center console removed. To gain access to the selector module, it is necessary to remove the center console. See our tech article on center console removing.

Once the center console it removed, the shift knob and boot have to come off.
Figure 2

Once the center console it removed, the shift knob and boot have to come off. Start by rotating the shift knob-locking collar toward the left side of the vehicle (red arrow).

Pull the shift knob with boot straight up to remove it (red arrow).
Figure 3

Pull the shift knob with boot straight up to remove it (red arrow).

Next, working at the front of the shift selector module, disconnect the electrical connectors (red arrows) by pulling them straight out.
Figure 4

Next, working at the front of the shift selector module, disconnect the electrical connectors (red arrows) by pulling them straight out.

Remove the three 10mm shift selector module mounting fasteners (red arrows).
Figure 5

Remove the three 10mm shift selector module mounting fasteners (red arrows). Next, you will remove the shift interlock cable (yellow arrow).

Slide the selector module toward the rear of the vehicle (yellow arrow).
Figure 6

Slide the selector module toward the rear of the vehicle (yellow arrow). Then rotate the interlock cable collar 90 degrees counterclockwise. Then slide the cable out of the selector module.

Lift the selector module up, place a coat hanger (red arrow) or mechanic's wire around the shift linkage (yellow arrow).
Figure 7

Lift the selector module up, place a coat hanger (red arrow) or mechanic's wire around the shift linkage (yellow arrow). This will prevent the linkage from falling down into the transmission tunnel.

Lift the selector module just enough to access the clip (yellow arrow).
Figure 8

Lift the selector module just enough to access the clip (yellow arrow). Then press the tab on the clip (red arrow) and slide it straight off the shift linkage and selector module lever. Remove the selector module from the vehicle.

Installing the new selector module is the reverse of removal.
Figure 9

Installing the new selector module is the reverse of removal. Be sure to replace the shift linkage (blue arrow) bushing (green arrow) if it is worn. When installing the clip, be sure the raised tabs (yellow arrows) mate with the groove on the end of the linkage and that the flat tabs (red arrows) mate with the groove on the bushing.

Bookmark and Share
Comments and Suggestions:
bmedic Comments: Do you have a guide for performing this procedure on the W210?

Thank you.
November 28, 2016
  Followup from the Pelican Staff: W210 articles here:

http://www.pelicanparts.com/techarticles/MBZ_Tech_Index-W210.htm - 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: Wed 12/7/2016 02:48:13 AM