M-Class (W164) Produced 2006-2011: ML280CDI, ML320CDI, ML420CDI, ML350, ML500, ML550

ML350 2009 Bad transmission leak

Old Jun 9, 2023 | 05:26 AM
  #1  
kiwimade's Avatar
Thread Starter
Newbie
 
Joined: Jun 2023
Posts: 3
Likes: 0
ML350 W164
ML350 2009 Bad transmission leak

I backed out of the garage and then saw a large pool of transmission fluid on the concrete. I only seems to leak when it is running. I will post a video. Does anybody have any idea on where this may be coming from?
Attached Files
File Type: avi
IMG_4202.avi (5.69 MB, 49 views)
Reply
Old Jun 9, 2023 | 08:11 AM
  #2  
DLB_Adelaide's Avatar
Member
Liked
Loved
 
Joined: Mar 2023
Posts: 119
Likes: 18
GL320 X164 OM642 722.902
Originally Posted by kiwimade
I backed out of the garage and then saw a large pool of transmission fluid on the concrete. I only seems to leak when it is running. I will post a video. Does anybody have any idea on where this may be coming from?
vague. Best way is you take a video while it is leaking. Don’t be afraid to crawl on the ground.
Reply
Old Jun 9, 2023 | 04:46 PM
  #3  
kiwimade's Avatar
Thread Starter
Newbie
 
Joined: Jun 2023
Posts: 3
Likes: 0
ML350 W164
Video showing the leak.

Sorry new to this site. I have pasted the URL of the video. Thank you

https://youtube.com/shorts/AjeskC8TlHY?feature=share
Reply
Old Jun 9, 2023 | 07:39 PM
  #4  
DLB_Adelaide's Avatar
Member
Liked
Loved
 
Joined: Mar 2023
Posts: 119
Likes: 18
GL320 X164 OM642 722.902
Originally Posted by kiwimade
Sorry new to this site. I have pasted the URL of the video. Thank you

https://youtube.com/shorts/AjeskC8TlHY?feature=share
Looks like it is coming from the bell housing. Clean everything first, grab a degreaser from your auto shop. Run it again and take a video while leaking. That leak is really bad. Do not drive it.

Inside that bell housing will be a torque converter which has some 3L transmission oil inside. Your fluid looks like red ATF dex3/4??
Reply
Old Jun 10, 2023 | 04:50 AM
  #5  
kiwimade's Avatar
Thread Starter
Newbie
 
Joined: Jun 2023
Posts: 3
Likes: 0
ML350 W164
Not sure what transmission oil was used in the last service. Transmission was serviced about a year. It was serviced at a Mercedes service center.
Your right, I'm definitely not driving it. I was lucky to notice it and not take it on a longer drive. My first thought was the drain plug for the torque converter because of the amount of oil. I rotated the converter until I could see the plug and it was fine, no signs of damage to the converter, although it isn't easy to see into the bell housing. All the oil is definitely coming from inside the bell housing.
Because of the amount of oil coming out I was hoping that it might be something simple like a loose drain plug. I can't think what have to break for there to be that much oil come out? I would assume if a seal was busted then it would be a slow drip.
Reply
Old Jun 10, 2023 | 06:40 AM
  #6  
DLB_Adelaide's Avatar
Member
Liked
Loved
 
Joined: Mar 2023
Posts: 119
Likes: 18
GL320 X164 OM642 722.902
Originally Posted by kiwimade
Not sure what transmission oil was used in the last service. Transmission was serviced about a year. It was serviced at a Mercedes service center.
Your right, I'm definitely not driving it. I was lucky to notice it and not take it on a longer drive. My first thought was the drain plug for the torque converter because of the amount of oil. I rotated the converter until I could see the plug and it was fine, no signs of damage to the converter, although it isn't easy to see into the bell housing. All the oil is definitely coming from inside the bell housing.
Because of the amount of oil coming out I was hoping that it might be something simple like a loose drain plug. I can't think what have to break for there to be that much oil come out? I would assume if a seal was busted then it would be a slow drip.
Looks like there is a gear pump and some seals on the front of the gearbox. See here.




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 06:54 PM.

story-0
New Electric Mercedes-AMG GT 4-Door Coupe Unveiled: 10 Things You Need to Know

Slideshow: Mercedes-AMG's new electric GT 4-Door Coupe trades combustion for software, synthetic noise, and more than 1,100 horsepower.

By Verdad Gallardo | 2026-05-20 20:08:15


VIEW MORE
story-1
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-2
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-3
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-4
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-5
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-6
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-7
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-8
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-9
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