M-Class (W166) Produced 2012-2015

Life Gate Issue

Old Mar 8, 2021 | 02:42 AM
  #1  
MecML's Avatar
Thread Starter
Newbie
 
Joined: Mar 2021
Posts: 4
Likes: 3
ml320
Life Gate Issue

Hello all, I have a ML250 (W166). The automatic liftgate stopped functioning about a month ago. It will automatically unlatch (and latch) but the will not automatically lift or close. All the fuses are OK and the lift actuator is new. I have a position sensor on order. Any ideas of items I should check? Is there a relay in the system which I should check?

Thanks for any help.

Last edited by MecML; Mar 8, 2021 at 03:40 AM.
Reply
Old Mar 8, 2021 | 02:45 AM
  #2  
Zuffen's Avatar
Member
 
Joined: Jul 2018
Posts: 99
Likes: 26
2002 Ml320, 2012 ML350 & Slk55
I think it could be the gas strut has lost pressure and the lift arm isn't strong enough to raise the tail gate without that bit of assistance.

I've noticed my tailgate won't open sometimes on a hill and I think it's the gas strut as the tailgate works fine on the flat.

Reply
Old Mar 8, 2021 | 02:49 AM
  #3  
MecML's Avatar
Thread Starter
Newbie
 
Joined: Mar 2021
Posts: 4
Likes: 3
ml320
The strut on the driver's side is fine. The actuator is not getting power/signal on the passenger side. It is new (thought that was the issue and replaced it, but it is not). When push the remote button or door button or the rear hatch button/lever the auto latch unlatches the door, but the actuator does nothing... I can manually open an close the liftgate fine (and it stay up when open).
Reply
Old Mar 8, 2021 | 07:57 AM
  #4  
gkgeiger's Avatar
Senior Member
 
Joined: Mar 2015
Posts: 442
Likes: 29
From: Ohio/Florida
'10 C300, '15 ML250BT, '22 M850i Vert
The dealer replaced my actuator a few months ago, I do have an extended warranty though.
Reply
Old Mar 8, 2021 | 12:43 PM
  #5  
chassis's Avatar
Out Of Control!!
MBWorld Ambassador

5 Year Member
Liked
Loved
 
Joined: Sep 2018
Posts: 14,678
Likes: 4,578
From: unbegrenzt
2017 GLE350 4MATIC
Either replace the actuator or dig into the spare tire area to see if you have signs of water. W164 and some W166 models have been known to have water ingress in the spare tire area and it can cause electrical problems.
Reply
Old Mar 8, 2021 | 12:52 PM
  #6  
MecML's Avatar
Thread Starter
Newbie
 
Joined: Mar 2021
Posts: 4
Likes: 3
ml320
Actuator has been replaced, so that was not the issue. I reset the liftgate last night and it looks like that solved the problem. Thanks to all the folks who replied to this message.
Reply
Old Mar 10, 2021 | 12:42 AM
  #7  
telrush's Avatar
Junior Member
 
Joined: Mar 2016
Posts: 23
Likes: 1
2004 SL500 2015 ML350 Bluetec
Originally Posted by MecML
Actuator has been replaced, so that was not the issue. I reset the liftgate last night and it looks like that solved the problem. Thanks to all the folks who replied to this message.
Hi,
Can you explain how you reset the liftgate signal? I think I might have the same issue with my problem.

Best,
TJ
Reply
Old Mar 10, 2021 | 07:44 PM
  #8  
OnlyGerman's Avatar
MBWorld Fanatic!
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Aug 2012
Posts: 1,047
Likes: 174
From: Florida
Too many german broads
Originally Posted by telrush
Hi,
Can you explain how you reset the liftgate signal? I think I might have the same issue with my problem.

Best,
TJ
Also interested in knowing this process
Reply
MB World Stories

The Best of Mercedes & AMG

story-0

6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

 Verdad Gallardo
story-1

Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

 Verdad Gallardo
story-2

Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

 Verdad Gallardo
story-3

8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

 Verdad Gallardo
story-4

Flawlessly Restored Mercedes 190E Evo II Heads to Auction

 Verdad Gallardo
story-5

Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

 Verdad Gallardo
story-6

Mercedes EQS Gets A Major Update: Everything You Need to Know

 Verdad Gallardo
story-7

5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

 Verdad Gallardo
story-8

Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

 Verdad Gallardo
story-9

10 Most Reliable Mercedes-Benz Models You Can Buy Used

 Verdad Gallardo
Old Jun 13, 2021 | 08:58 AM
  #9  
pgolfco's Avatar
Member
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Feb 2014
Posts: 94
Likes: 26
From: Houston, TX
2018 Lexus LC500, 2020 GLE350 4Matic, 2005 Jeep Wrangler
What is the process for "resetting" the lift gate?

Please advise.

Thank you,
Chris
Reply
Old Jun 13, 2021 | 04:43 PM
  #10  
chassis's Avatar
Out Of Control!!
MBWorld Ambassador

5 Year Member
Liked
Loved
 
Joined: Sep 2018
Posts: 14,678
Likes: 4,578
From: unbegrenzt
2017 GLE350 4MATIC
Reply
Old Jun 19, 2021 | 12:03 PM
  #11  
MB350ML's Avatar
Newbie
 
Joined: Jun 2021
Posts: 2
Likes: 0
2011 ML350, 2011 C300, 2005 C230 kompressor
Originally Posted by Zuffen
I think it could be the gas strut has lost pressure and the lift arm isn't strong enough to raise the tail gate without that bit of assistance.

I've noticed my tailgate won't open sometimes on a hill and I think it's the gas strut as the tailgate works fine on the flat.
I am having the same issue but it has both the lift arm and the gas strut new.
Reply
Old Dec 2, 2021 | 04:15 PM
  #12  
L-L's Avatar
L-L
Junior Member
 
Joined: Mar 2021
Posts: 54
Likes: 4
2015 GL350 Bluetec
Originally Posted by MecML
Actuator has been replaced, so that was not the issue. I reset the liftgate last night and it looks like that solved the problem. Thanks to all the folks who replied to this message.
MecML, Can you explain how you reset the liftgate?
Thank you
Reply
Old Dec 4, 2021 | 06:09 AM
  #13  
hyibin's Avatar
Junior Member
 
Joined: Jan 2015
Posts: 23
Likes: 5
E270 cdi W211, E350 cdi W212, ML350 BlueTec W166
Use Xentry to reset the tailgate unit.
Reply

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

Thread Tools
Search this Thread
Rate This Thread
Rate This Thread:
You have already rated this thread Rating: Thread Rating: 0 votes,  average.


All times are GMT -4. The time now is 05:30 PM.

story-0
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

Slideshow: Not every Mercedes design becomes timeless, some feel stuck in the era they came from.

By Verdad Gallardo | 2026-05-12 18:09:07


VIEW MORE
story-1
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

Slideshow: Yes, Mercedes built manual cars, and some of them are far more interesting than you'd expect.

By Verdad Gallardo | 2026-05-02 12:36:58


VIEW MORE
story-2
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.

By Verdad Gallardo | 2026-04-29 11:19:28


VIEW MORE
story-3
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

Slideshow: Before curves took over, Mercedes mastered the art of the straight line, and some of those shapes still look right today.

By Verdad Gallardo | 2026-04-25 12:05:49


VIEW MORE
story-4
Flawlessly Restored Mercedes 190E Evo II Heads to Auction

Slideshow: The 190E Evolution II shows how a homologation necessity became a six-figure collector icon.

By Verdad Gallardo | 2026-04-22 17:53:47


VIEW MORE
story-5
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

Slideshow: Mercedes is turning one of its core nameplates electric, and the details show just how serious this shift is.

By Verdad Gallardo | 2026-04-21 13:58:06


VIEW MORE
story-6
Mercedes EQS Gets A Major Update: Everything You Need to Know

Slideshow: Faster charging, longer range, and a controversial steer-by-wire system define the latest evolution of Mercedes-Benz EQS.

By Verdad Gallardo | 2026-04-15 10:35:34


VIEW MORE
story-7
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

Slideshow: These overlooked Mercedes-Benz models never got the spotlight, but they quietly delivered more than most remember.

By Verdad Gallardo | 2026-04-13 19:35:45


VIEW MORE
story-8
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

Slideshow: A well-used 1991 Mercedes-Benz 300D with more than one million miles is now looking for a new owner, and it still appears ready for more.

By Verdad Gallardo | 2026-04-10 10:05:15


VIEW MORE
story-9
10 Most Reliable Mercedes-Benz Models You Can Buy Used

Slideshow: From bulletproof sedans to surprisingly tough SUVs, these Mercedes models proved that the three-pointed star can go the distance.

By Verdad Gallardo | 2026-04-08 09:55:49


VIEW MORE