CourtneyW

Hello, I replaced the oil cooler seals on my 2011 ML350 back in April 2017. I have not had any oil leaks from the oil cooler since! I am attaching the documents I used from WIS (PDF), 21 PDF attachments total.

I dont think I would of been able to do this job without the link below. I highly recommend reading the information in the link below prior to replacing the seals. I actually had this article pulled up on my laptop while replacing the seals. Mind you, I am not a mechaic. Before replacing the oil cooler seals, my husband changed my oil. I had zero experience working on any type of vehicle! (I didnt F anything up either "thumbs up"). I told my husband that I wanted to do as much of the work as physically possible (Im 5ft 115 pounds), he had to remove the EGR and Turbo because no way in hell would I have been able to do it alone. I gained a ton of knowlege from replacing the seals and have done 100% of the work on my ML since then.

http://www.peachparts.com/shopforum/...oler-leak.html

The way I explain this job to others is by breaking down into 6 segments
***Disconnect your battery, drain your oil and drain your coolant first!***
1 - Top Portion (Removing the bat wing/air boxes)
2 - Front Right Side (Removing the silver turbo intake tube/black air duct that attaches to the intake tube).
3 - Front Left Side (Removing the oil dipstick guide/noise damper/black air channel that attaches to the silver Bosh throttle valve actuator/black plastic mixing chamber)
4 - EGR and Turbo Removal
5 - Fuel filter, fuel lines, fuel rail and wiring harness.
6 - Intake manifold (left and right side), then the oil cooler

I bought all of my sockets and tools from Harbor Freight (my husband advice to me: If your income and job dont depend on it, buy it from Harbor Freight. If its a one time use, go to Harbor Freight). I have bought a good amount of crap from Harbor Freight since replacing the seals.... Would I buy any of my woodworking tools from there? HELL NO! (I'm a woodworker/build furniture for a living). I still use everything I bought from HF to work on my ML, the only thing that broke was a short ratchet which they replaced for free (lifetime warrently). They always have a 20% off coupon and coupons for free stuff (Highly recommend the pack of microfiber towels coupon!). Yes, everything they sell is cheap and made in China. If your replacing these seals yourself I'm assuming your trying to save yourself a few grand (whatever your dealership wanted to charge you for replacing the seals), so picking up tools from HF shouldnt be a big deal.

I have a ton of pictures that I will upload soon. Feel free to message me if you have questions!

Cheers! - Courtney

lkchris

This thread regards OM642 diesel engine

CourtneyW

Correct. Did I post this in the wrong section?

kombifan

Nope. He just wants to make it clear to other casual viewers that your post was about the ml 350 diesel engine.

But great work and writeup!
That's amazing!

I don't think I'd be so brave but kudos to you for researching and performing sucessfulky that repair!

I'm sure your post will give confidence to those who will need to replace it in the future!

Thanks and keep up the good work!

lkchris

Yes, I appreciate this post since I have GL with OM642.

Today, however, I was searching for M273 (gasoline) oil cooler and search sent me to this.

CourtneyW

Thank you! I just could not justify paying a few grand for someone else to replace 2 $12 seals. I bought this pre-owned, I drove it off the lot, got 15-20 miles down the road and the check engine light came on (turbo inlet seal and nox sensor). I knew if I wanted to keep this thing I was going to have to figure out how to work on it myself. Every other Mercedes I have owned has been solid, drove them with no major issues at all but this thing has been a different beast.

kombifan

Wish you would have joined us before you purchased, then you could have gone into the situation eyes open.

If you ask the guys or look throigh the threads in the diesel forum, there are a number of companies recommended for a diesel tune that fixes most of the potential trojblemaking aspects so that mb diesel reliability can return as scheduled.

Best of luck!

philwar

I can't thank you enough for posting these pdf's. I can't open my ML 300 manual from emanuel's (another issue I will solve latter) then I saw your post and I have a youtube vidoe of a guy actually removing the parts in the eaxact order you have listed here. I have torque wrenches and sockets everywhere, I have feeling this is big but very rewarding. Hopefully I can get the oil cooler changed.
Phil