Mercedes Gl 320 oil leak
Thread Starter
Junior Member
Joined: Jan 2024
Posts: 20
Likes: 1
Mercedes Gl
Mercedes Gl 320 oil leak
Hello! I'm new here, just registered. Have an 08 Mercedes Gl 320, at the end of November 2023 the seals on my oil cooler were replaced when it was leaking oil. have recently discovered oil drops under the car again, it looks like it's coming from the back of the engine on the driver's side. I have a really hard time believing it's the oil cooler again, just under 2 months since the repair.... Does anyone here have any idea what this could be coming from? I checked the turbo inlet seal, this is completely broken, almost split in half....could it come from here? Can it put as much as a few drops on the floor? Hoping for some good views and ideas 
MBWorld Fanatic!
Joined: May 2015
Posts: 1,932
Likes: 291
From: Allentown, PA
'08 GL 320 CDI
It could be any of the things you mentioned - even oil cooler seals if it wasn't done quite right.
To be clear... you are saying the oil drips STOPPED after the seal repair and has now started again?
Yes, the turbo inlet seal could equal what you are seeing on the floor - depending on how much accumulates based on drive time and where/when it collects and finally drips down.
Assuming that during the seal replacement, things were wiped down nice and clean, you should have an easier time (granted it's not in a great spot to see without mirrors/inspection camera) finding the source by following the trail.
To be clear... you are saying the oil drips STOPPED after the seal repair and has now started again?
Yes, the turbo inlet seal could equal what you are seeing on the floor - depending on how much accumulates based on drive time and where/when it collects and finally drips down.
Assuming that during the seal replacement, things were wiped down nice and clean, you should have an easier time (granted it's not in a great spot to see without mirrors/inspection camera) finding the source by following the trail.
Thread Starter
Junior Member
Joined: Jan 2024
Posts: 20
Likes: 1
Mercedes Gl
It could be any of the things you mentioned - even oil cooler seals if it wasn't done quite right.
To be clear... you are saying the oil drips STOPPED after the seal repair and has now started again?
Yes, the turbo inlet seal could equal what you are seeing on the floor - depending on how much accumulates based on drive time and where/when it collects and finally drips down.
Assuming that during the seal replacement, things were wiped down nice and clean, you should have an easier time (granted it's not in a great spot to see without mirrors/inspection camera) finding the source by following the trail.
To be clear... you are saying the oil drips STOPPED after the seal repair and has now started again?
Yes, the turbo inlet seal could equal what you are seeing on the floor - depending on how much accumulates based on drive time and where/when it collects and finally drips down.
Assuming that during the seal replacement, things were wiped down nice and clean, you should have an easier time (granted it's not in a great spot to see without mirrors/inspection camera) finding the source by following the trail.
Last edited by Havrahane; Jan 13, 2024 at 04:40 PM.
MBWorld Fanatic!
Joined: Jun 2010
Posts: 2,755
Likes: 628
From: Emmett, ID, USA
2007 GL450
Yes, that's right, there has been no leakage after the repair of the oil cooler/seals. Now suddenly drops appear under the car again. The work was done in a workshop, it was very detailed - I got pictures of the whole process, all parts and components as well as intake egr etc were cleaned and washed. But I reckon in any case it is some form of guarantee on this job considering the short time since it was done, will check over the weekend. But... as I said, the turbo inlet seal is almost split in two in the middle.... know it's leaking oil there, but don't know how much this can leak and whether this can relate to the drops on the floor. You mention drive time, does that have anything to do with how much it leaks or am I misunderstanding? The car has recently only been used for local driving, so much start/stop and cold driving really....
MBWorld Fanatic!
Joined: May 2015
Posts: 1,932
Likes: 291
From: Allentown, PA
'08 GL 320 CDI
Yes, that's right, there has been no leakage after the repair of the oil cooler/seals. Now suddenly drops appear under the car again. The work was done in a workshop, it was very detailed - I got pictures of the whole process, all parts and components as well as intake egr etc were cleaned and washed. But I reckon in any case it is some form of guarantee on this job considering the short time since it was done, will check over the weekend. But... as I said, the turbo inlet seal is almost split in two in the middle.... know it's leaking oil there, but don't know how much this can leak and whether this can relate to the drops on the floor. You mention drive time, does that have anything to do with how much it leaks or am I misunderstanding? The car has recently only been used for local driving, so much start/stop and cold driving really....
To Eric's question... it's hard to read what you are writing... for some reason it's showing up as a very light grey color?
MBWorld Fanatic!
Joined: Jun 2010
Posts: 2,755
Likes: 628
From: Emmett, ID, USA
2007 GL450
Drivetime... correct, the more the car is driven, the more oil will leak out past the turbo seal. It could still be something else, of course - where oil "drops" from is not always indicative of where it started from. This is where you put your detective hat on
To Eric's question... it's hard to read what you are writing... for some reason it's showing up as a very light grey color?
To Eric's question... it's hard to read what you are writing... for some reason it's showing up as a very light grey color?
MBWorld Fanatic!
Joined: May 2015
Posts: 1,932
Likes: 291
From: Allentown, PA
'08 GL 320 CDI
Trending Topics
MBWorld Fanatic!
Joined: Jun 2010
Posts: 2,755
Likes: 628
From: Emmett, ID, USA
2007 GL450
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
