Oil leaks on 2007 ML 320CDI
Out Of Control!!
Joined: Aug 2010
Posts: 12,516
Likes: 628
From: Charlotte NC area
2019 WS222 S450 4-Matic / 2007 W211 E350 4Matic (Sold) / 2008 X164 GL320 CDI
Had the dreaded oil cooler leak fixed by dealer almost two months ago. Parts were cheap but labor to take everything off the top of the engine and put it back was a killer. Dealer knocked $1000 off to get the bill to somewhere around $3500.
Apparently the seals in the oil cooler fail due to high temperatures. Parts guy said new coolers have improved seals but that might be BS.
My 2010 diesel had 90,000 miles on it when the leak started. Drove it for three months with the leak. It was just messy on the garage floor in the beginning but it got worse.
Ordered a new gasser when I picked up my repaired vehicle. I am keeping the diesel as a beater though.
Good luck!
Apparently the seals in the oil cooler fail due to high temperatures. Parts guy said new coolers have improved seals but that might be BS.
My 2010 diesel had 90,000 miles on it when the leak started. Drove it for three months with the leak. It was just messy on the garage floor in the beginning but it got worse.
Ordered a new gasser when I picked up my repaired vehicle. I am keeping the diesel as a beater though.
Good luck!
$4500 knocked down to $3500.
I have to believe some of that was for other work.
Member
Joined: Oct 2012
Posts: 140
Likes: 4
From: California
2010 GL350, 2005 BMW X5 4.8is, 2015 BMW 328d
To make your DIY catch can more effective, fill it with steel wool. The increased surface area will catch more oil vapor. Adding a drain valve will make your draining easier like a Fumoto or EZ drain.
Member
Joined: Jun 2013
Posts: 94
Likes: 5
From: Pike Road, AL
2008 ML320 CDI
That being said, why Mercedes put an oil "cooler" inside the engine block is a complete mystery to me.
Out Of Control!!
Joined: Aug 2010
Posts: 12,516
Likes: 628
From: Charlotte NC area
2019 WS222 S450 4-Matic / 2007 W211 E350 4Matic (Sold) / 2008 X164 GL320 CDI
Member
Joined: Jun 2013
Posts: 94
Likes: 5
From: Pike Road, AL
2008 ML320 CDI
Out Of Control!!
Joined: Aug 2010
Posts: 12,516
Likes: 628
From: Charlotte NC area
2019 WS222 S450 4-Matic / 2007 W211 E350 4Matic (Sold) / 2008 X164 GL320 CDI
If it weren't for a poor choice of seal material, no one would think it was a bad idea.
The guy who put it there probably did not pick the seal.
The guy who put it there probably did not pick the seal.
Member
Joined: Apr 2014
Posts: 105
Likes: 6
ML 320 CDI
Its more than just picking the right material for the seal. The expansion rate of these two parts are different. So they can expand and contract at different rates. Mercedes should have done better in R&D. Ford diesel F350's also had similar issues with locating the oil cooler in the same location. Unfortunately, nobody really knows what is the exact cause.
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
