ML350 W164 gearbox problem and limp mode

[DuncanML350]

Hi all

Having a problem with my 2009 ML350 W164

It seems to be an intermittent problem at the moment but here it is.

There seems to be a problem with the gearbox changing gear sometimes, it can occasionally refuse to change gear on the auto box and even when trying to use the paddle shift.

I also get a different problem where the car goes into a limp mode and is down on power

And on top of that when stationary it occasionally will not select a gear but turning off and on again normally clears this

I can normally clear the faults by pulling over and starting the engine again but it does seem to be getting

Any ideas on what could be causing the faults?

 

[skippyjasper]

You need to have the car scanned and report any codes found.

There’s too many possibilities to properly begin any diagnostic.


Sent from my iPad using Tapatalk

 

[DuncanML350]

Ok will do a diagnostic check and see what it flags up, need to do it for another problem so 2 birds with one stone on this one.

 

[grober]

With these electronically controlled boxes its often the conductor plate - if its that it can be changed with the gearbox in situ- as suggested get the fault codes read by MB star.

 

[AndrewOl]

Hi Duncan,

Had a similar issue with my 2006 GL. Turned out to be the conductor plate but as others have recommended a diagnostic using STAR is the place to start. I use Pentangle in Calmore who were excellent in sorting out the gearbox issue and other bits a pieces over the years.