Notices
SL-Class (R129) 1990-2002: SL 280, SL 300, SL 320, SL 500, SL 600, SL 60 AMG

Resetting Transmisdion

 
Old 03-14-2019, 12:42 AM
  #1  
Super Member
Thread Starter
 
ChrisB's Avatar
 
Join Date: Jul 2003
Location: Abbotsford, BC, Canada
Posts: 890
Thanked 5 Times in 5 Posts
1999 SL 500 & 2011 E 550 4Matic
Resetting Transmisdion

I just found this reference in a post;

” Try resetting the ECU. It really works. We have adaptive transmissions so they adapt overtime to your driving style. Check out this link.

http://www.mercedesmedic.com/reset-m...-instructions/

I just found this recently and the reset works on MB cars back to 1995.

By the comments it can fix a lot of problems.

I have not tried it myself ... but I will. The wife had been driving the car recently ...

Last edited by ChrisB; 03-14-2019 at 12:48 AM.
ChrisB is offline  
Old 03-15-2019, 02:31 PM
  #2  
Super Member
 
Join Date: Jan 2006
Posts: 887
Thanked 95 Times in 85 Posts
Originally Posted by ChrisB View Post
By the comments it can fix a lot of problems.
I can't imagine how it can fix any problems.

The diagnostic software cautions to only reset adaptations following the completion of repair work. It states that shift quality can not be expected to improve, though there will be a change.
bobterry99 is online now  
Old 03-16-2019, 01:28 PM
  #3  
Super Member
Thread Starter
 
ChrisB's Avatar
 
Join Date: Jul 2003
Location: Abbotsford, BC, Canada
Posts: 890
Thanked 5 Times in 5 Posts
1999 SL 500 & 2011 E 550 4Matic
Originally Posted by bobterry99 View Post
The diagnostic software cautions to only reset adaptations following the completion of repairwork.
Are you saying this is bad to do?

On the W212 E Class forum - several members say they do this procedure every month or so.

Seeing improvement in sluggish shifting.

I do not know how adaptive the transmissions are - but over the years ... occasionally I sense odd shifting / awkward down shifts on kick down.

Then on long road trips ... or a good stint of sporty driving - the car is very responsive & strong.

I was thinking the procedure might reset the shift points after my wife has been putting around through the winter months.

Spring cleaning ...

Last edited by ChrisB; 03-21-2019 at 11:32 PM.
ChrisB is offline  
Old 03-17-2019, 09:50 AM
  #4  
Super Member
 
Join Date: Jan 2006
Posts: 887
Thanked 95 Times in 85 Posts
Originally Posted by ChrisB View Post
On the W212 E Class forum - several members say they do this procedure every month or so.
A W212 has a different transmission, of course. Also, there may be a placebo effect. We've all probably read forum posts of members rhapsodizing how some product has made their car perform better though it has not. Exhibit A: lighter crankshaft pulley. Exhibit B: Sprint Accelerator.

Originally Posted by ChrisB View Post
Are you saying this is bad to do?
The Web page you linked to gives two methods to perform a reset and equates them. I do not know what, if anything, the first method does. The second method is counter-productive, since it erases "adaptations" the transmission ECU has made which compensate for differences in components which result from varying manufacturing tolerances and wear.

I presume the cautionary note from Mercedes has more to do with not wasting customer money than preventing harm to the transmission.

I suggest you give the reset procedure a try. If you think it works, have your wife learn the procedure and participate in an experiment where you try to correctly guess if/when she has done the reset.
bobterry99 is online now  
Old 03-17-2019, 07:24 PM
  #5  
Super Member
Thread Starter
 
ChrisB's Avatar
 
Join Date: Jul 2003
Location: Abbotsford, BC, Canada
Posts: 890
Thanked 5 Times in 5 Posts
1999 SL 500 & 2011 E 550 4Matic
Did the procedure today ... but could not test the way I normally would.

I am the type of guy that thinks the car runs better after I wash & polish it ...

Still smooth & strong as ever, on today’s first top down driving of the spring - after taking the panoramic roof off yesterday (and washing the car).
ChrisB is offline  
Old 03-21-2019, 11:47 PM
  #6  
Super Member
Thread Starter
 
ChrisB's Avatar
 
Join Date: Jul 2003
Location: Abbotsford, BC, Canada
Posts: 890
Thanked 5 Times in 5 Posts
1999 SL 500 & 2011 E 550 4Matic
After I reset the transmission last weekend (as prescribed in the link) - my wife drove the car 2 days this week. Both trips about 50 miles round trip, at highway speeds.

Out of no where tonight she said - by the way, she found the car was much more powerful in acelleration from slow speeds and when passing.

I would say this unsolicited endorsement is proof that the procedure does reset shift points or the accumulated adaptive transmission sludge.

Some one else should try it.
ChrisB is offline  
 

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 

Thread Tools
Search this Thread
Rate This Thread
Rate This Thread:

Quick Reply: Resetting Transmisdion


Contact Us - About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: