M-Class (W166) Produced 2012-2015

Workshop Destroyed My Engine

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old Apr 1, 2020 | 07:54 AM
  #1  
delirans's Avatar
Thread Starter
Newbie
 
Joined: Mar 2020
Posts: 6
Likes: 0
From: Estonia
2013 ML350
Workshop Destroyed My Engine

Hi everyone

New user, first post.

I have a problem and I need some help from car enthusiasts like yourselves, hopefully I'm at the right place for that. It's going to be a long post, I'll try to be as brief as possible.

I own a 2013 ML 350 BT and a few months ago there was a small oil leak under the hood and I took the car immediately to the workshop, they added some oil and scheduled the car for a B-service. After they performed the B-service, they diagnosed the cause of the leak as being the seals of the intercooler, which they said had to be changed.

After performing the repairs, whilst the car was still in their custody and under care, they took the car to a test drive. During the test drive, the engine malfunctioned completely. Without taking the engine apart, they claimed the malfunction was due to to inadequate maintenance. Namely, as it turned out, the last owner hadn't been to regular maintenance from August 2015 to August 2018 (approx. 36,000 km driven during this period). This felt as totally made up reasoning to avoid responsibility on their part but as I'm not a car engine specialist I had no real options to contest their version.

Then they offered to replace the destroyed engine with a used one. I said yes and then they managed to destroy the new engine as well. It turned out that they had taken the oil pump from the original engine and used it on the new engine without even checking it first and it seems that the oil pump was the cause of the malfunction of both engines.

So now here I am, three months later, still with no working car and arguing with them who should take responsibility here.

Here are few questions that I have regarding this whole thing:
  • Does it really make sense that with no regular maintenance the engine just breaks down like that after an oil change (which they said it washed metal pieces off the engine and that caused the malfunction) or is it more likely they did a poor job with changing the seals of the intercooler?
  • Is it plausible that the oil pump was defective before taking the car to the workshop and it was just a coincidence that it broke down after they had finished the repairs, or is there a better explanation that during the repairs they did something wrong that might have caused the oil pump (or the engine) to fail?
  • Are there any crucial questions I should be asking them that would help me to find out the truth?
Feels like they just want to screw me over here big time, should I really bend over and let them do it? Cars and engines are not my trade really, so I apologize if I've missed something really obvious from the start.

Any help is much appreciated. I'd be happy to answer any questions you might have about the situation.

Thanks in advance

delirans
Reply
Old Apr 1, 2020 | 11:28 AM
  #2  
JALLEN4's Avatar
Senior Member
10 Year Member
Liked
 
Joined: Sep 2012
Posts: 342
Likes: 83
From: SOUTHWEST OHIO
2016 E350 2015 ML250 2002 Z06 CORVETTE
I am a retired dealer and former Service Director, before owning, so have some experience with these sorts of problems. You call it a workshop but don't mention whether you took your car to an authorized Mercedes dealer or an independent. If an independent, the first lesson is it can become much more a problem when things go wrong.

It certainly is not uncommon for things to break after the dealer makes repairs. It is frustrating but often happens when cars have a poor maintenance record. On the other hand, while one could argue the responsibility for the first repair subsequent to the first, a second engine failure is in my view inexcusable. It would be the dealer's responsibility to check for actual operation of transferred parts to the new engine. What we say is a "rookie mistake".

Personally, I would think the second repair is theirs. Every shop should carry liability insurance and they should be thinking about using it. If they hesitate, in most jurisdictions the shop operates with government consent. I would look at licensing agencies, consumer affairs outlets, etc. or even seek legal aid. It certainly seems you are worthy of consideration from the repair facility.
Reply
Old Apr 1, 2020 | 12:11 PM
  #3  
Koenig1's Avatar
Senior Member
 
Joined: Sep 2012
Posts: 323
Likes: 31
From: Ottawa ON Canada
2015 ML350 Bluetec
Wow, just WOW! Sounds like Major incompetence! I reread your posting 3x. The oil pump somehow was responsible for Both engines... NO, No, NO! In the 1st engine, the dead oil pump would have signaled low oil pressure with the red idiot light on the dash. Same with the 2nd engine startup...! It sounds like someone drained the oil on the B service, then forgot to fill before said test drive. >>> seized it up>> with no oil, although the tech should have seen the idiot light??? Used engine... comes with no oil pump???? never heard of it. Recycling facilities send out complete engines. Why would someone open up a used engine to replace an oil pump with another 'used' one? Something is way out of wack with the story....?
I'd almost hazard a guess that they never changed out you engine!!! They may have freed it up, dumped some oil into it, and then the oil pump died from crap that they didn't clean out. For the fun of it ask to see the 2 engines, Is this an MB dealer?
Reply
Old Apr 1, 2020 | 03:36 PM
  #4  
delirans's Avatar
Thread Starter
Newbie
 
Joined: Mar 2020
Posts: 6
Likes: 0
From: Estonia
2013 ML350
Originally Posted by JALLEN4
You call it a workshop but don't mention whether you took your car to an authorized Mercedes dealer or an independent. If an independent, the first lesson is it can become much more a problem when things go wrong.

It certainly is not uncommon for things to break after the dealer makes repairs. It is frustrating but often happens when cars have a poor maintenance record. On the other hand, while one could argue the responsibility for the first repair subsequent to the first, a second engine failure is in my view inexcusable. It would be the dealer's responsibility to check for actual operation of transferred parts to the new engine. What we say is a "rookie mistake".

Personally, I would think the second repair is theirs. Every shop should carry liability insurance and they should be thinking about using it. If they hesitate, in most jurisdictions the shop operates with government consent. I would look at licensing agencies, consumer affairs outlets, etc. or even seek legal aid. It certainly seems you are worthy of consideration from the repair facility.
Thanks for your thoughts.

It's a huge dealership that mostly sells and services Hondas and Citroens, but they started the process of becoming a MB dealership as well. They have large MB logos on their walls etc, but I even contacted Daimler directly and it turned out that they're not an official dealership at this point, so they couldn't help me with the situation.

Second engine is not a problem, they know very well that they made a mistake by using an oil pump from the original engine even without testing it, that is a real rookie mistake, and they're covering all the costs for it.

But I'm still trying to figure out if the oil pump could have been damaged before taking the car to them or did they do something that caused that and, hence, crashed the engine. If it was damaged before, would it have been a standard practice for them to measure the pressure and make sure that the oil pump is also working properly before taking it on a testdrive after they changed intercooler seals? If yes, then I could argue with confidence that they did a poor job and tell them to fix the car on their expense.

Reply
Old Apr 1, 2020 | 03:50 PM
  #5  
delirans's Avatar
Thread Starter
Newbie
 
Joined: Mar 2020
Posts: 6
Likes: 0
From: Estonia
2013 ML350
Originally Posted by Koenig1
Wow, just WOW! Sounds like Major incompetence! I reread your posting 3x. The oil pump somehow was responsible for Both engines... NO, No, NO! In the 1st engine, the dead oil pump would have signaled low oil pressure with the red idiot light on the dash. Same with the 2nd engine startup...! It sounds like someone drained the oil on the B service, then forgot to fill before said test drive. >>> seized it up>> with no oil, although the tech should have seen the idiot light??? Used engine... comes with no oil pump???? never heard of it. Recycling facilities send out complete engines. Why would someone open up a used engine to replace an oil pump with another 'used' one? Something is way out of wack with the story....?
I'd almost hazard a guess that they never changed out you engine!!! They may have freed it up, dumped some oil into it, and then the oil pump died from crap that they didn't clean out. For the fun of it ask to see the 2 engines, Is this an MB dealer?
Thanks for the feedback.

I couldn't agree more that it sounds awfully incompetent on their part but it's really difficult to prove anything. I have to come up with proper specific questions to ask them regarding changing the intercooler seals. I.e. did you check the radiator, was there any signs of burned oil (which should be there if what they claim is true), etc.

No blinking warning lights when I took the car there, no idea if it happened when the car was there.

Second engine was from a S class and they said the pump didn't fit / couldn't be used. I don't know much more about that. After the B service I had the car for a week or so, until the right parts were delivered, so it couldn't have been that they forgot to fill it up.
Reply
Old Apr 1, 2020 | 05:24 PM
  #6  
Koenig1's Avatar
Senior Member
 
Joined: Sep 2012
Posts: 323
Likes: 31
From: Ottawa ON Canada
2015 ML350 Bluetec
"I own a 2013 ML 350 BT and a few months ago there was a small oil leak under the hood and I took the car immediately to the workshop, they added some oil and scheduled the car for a B-service. After they performed the B-service, they diagnosed the cause of the leak as being the seals of the intercooler, which they said had to be changed.

After performing the repairs, whilst the car was still in their custody and under care, they took the car to a test drive. During the test drive, the engine malfunctioned completely"
and, on subsequent response...
"
After the B service I had the car for a week or so, until the right parts were delivered, so it couldn't have been that they forgot to fill it up."
Am I missing something, or have you just changed the whole parameters of your situation....

In any event, when one is changing intercooler seals, most will change out the oil.... unless someone is being cheap. Most MB dealerships will simply charge the customer for this rather than take the shortcut.
... sorry to say, I'm starting to side with the dealership.... your statements don't
correlate!
Reply
Old Apr 1, 2020 | 05:53 PM
  #7  
delirans's Avatar
Thread Starter
Newbie
 
Joined: Mar 2020
Posts: 6
Likes: 0
From: Estonia
2013 ML350
Originally Posted by Koenig1
"I own a 2013 ML 350 BT and a few months ago there was a small oil leak under the hood and I took the car immediately to the workshop, they added some oil and scheduled the car for a B-service. After they performed the B-service, they diagnosed the cause of the leak as being the seals of the intercooler, which they said had to be changed.

After performing the repairs, whilst the car was still in their custody and under care, they took the car to a test drive. During the test drive, the engine malfunctioned completely"
and, on subsequent response...
"
After the B service I had the car for a week or so, until the right parts were delivered, so it couldn't have been that they forgot to fill it up."
Am I missing something, or have you just changed the whole parameters of your situation....

In any event, when one is changing intercooler seals, most will change out the oil.... unless someone is being cheap. Most MB dealerships will simply charge the customer for this rather than take the shortcut.
... sorry to say, I'm starting to side with the dealership.... your statements don't
correlate!
No, I haven't changed anything, I tried to make it as short as possible. Exact timeline is as follows: noticed an oil leak, went to the workshop to check what's wrong, they added some oil just in case and scheduled a B service which was due anyway. During the B service they diagnosed the cause of the leak (intercooler seals), they gave me back the car for a week or so as they had to order the right parts, I took the car back and then they changed the intercooler seals and engine malfunctioned during the test drive.

My point was that they didn't perform B service and changed intercooler seals on the same day, so it couldn't have been that someone tried to start the engine with no oil in the engine during B service. Hopefully cleared that point clear enough.

"In any event, when one is changing intercooler seals, most will change out the oil.... unless someone is being cheap"
Cmon man, no one even asked me if I wanted to change the oil or save a few bucks on that.
Reply
Old Apr 1, 2020 | 06:11 PM
  #8  
delirans's Avatar
Thread Starter
Newbie
 
Joined: Mar 2020
Posts: 6
Likes: 0
From: Estonia
2013 ML350
Originally Posted by Koenig1
"In any event, when one is changing intercooler seals, most will change out the oil.... unless someone is being cheap. Most MB dealerships will simply charge the customer for this rather than take the shortcut.
... sorry to say, I'm starting to side with the dealership.... your statements don't
correlate!
But you're on to something, I checked the the summary and they haven't charged me for oil. So, did they decide not to change the oil because they had performed a B service recently? What could be their reasoning here? Should I be asking serious questions about that? Sorry, it's not in English unfortunately. I can translate whatever is necessary. But there are mostly seals, and I don't even know what are some parts in English.


Last edited by delirans; Apr 1, 2020 at 06:22 PM.
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 Apr 1, 2020 | 06:41 PM
  #9  
Koenig1's Avatar
Senior Member
 
Joined: Sep 2012
Posts: 323
Likes: 31
From: Ottawa ON Canada
2015 ML350 Bluetec
"In any event, when one is changing intercooler seals, most will change out the oil.... unless someone is being cheap"
Cmon man, no one even asked me if I wanted to change the oil or save a few bucks on that.

Well.... If you believe you have a case, call MB ____ customer service. ____ Not sure where you're from, although your bill is in Euros. Your profile should be filled in! I would write out, in length, what has happened to you before calling/writing, to be sure all the facts/timelines can be substantiated.
good luck
Reply
Old Apr 1, 2020 | 06:52 PM
  #10  
delirans's Avatar
Thread Starter
Newbie
 
Joined: Mar 2020
Posts: 6
Likes: 0
From: Estonia
2013 ML350
Originally Posted by Koenig1
"In any event, when one is changing intercooler seals, most will change out the oil.... unless someone is being cheap"
Cmon man, no one even asked me if I wanted to change the oil or save a few bucks on that.

Well.... If you believe you have a case, call MB ____ customer service. ____ Not sure where you're from, although your bill is in Euros. Your profile should be filled in! I would write out, in length, what has happened to you before calling/writing, to be sure all the facts/timelines can be substantiated.
good luck
Actually I already contacted MB customer service and they told me that they won’t get involved because this dealership/workshop is not an official dealership in Estonia (that’s where I’m from, I will fill out the profile, thanks for pointing it out).

I barely know anything about cars, that’s why I wanted to consult here with you guys. Am I being ignorant or am I being screwed over here, I really don’t know. Just considering everything it feels like I’m at the receiving end in this mess.

thanks again
Reply

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


You have already rated this thread Rating: Thread Rating: 0 votes,  average.


All times are GMT -4. The time now is 12:22 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