GL Class (X166) 2013-2015 after facelift became GLS (X166)

Cylinder head replaced at 50K?

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Old Jan 3, 2022 | 05:14 PM
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2010 R350, 2012 CLS63 P30 (sold), 2009 C63 (totaled), 2002 ML320 (Sold)
Cylinder head replaced at 50K?

I'm looking at another GL450 Carfax and it notes that the Transmission was removed, cylinder head replaced, and wiring harness repaired at the 50K mark by a merc dealership in california.
This was done in April of 2019
Given the time the cylinder head was replaced - would this already being replaced alleviate most of those worries about cylinder #5 failure I keep hearing about?
I called the repair facility and they said that it was a "torque converter locked up and bad compression in cylinder #5". The car was then sent to a MB dealership where it got the repair done.
The MB dealership would NOT share the service history with me unless I am the owner of the vehicle - So I have to buy the car to find out whats in the car... LOL Like congress and their bills?

So I guess the question is: when these get repaired/replaced by MB, are they then considered "bulletproofed" as far as a future failure is concerned or should I be MORE concerned?

Car currently has 56K on the clock.
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Old Jan 3, 2022 | 08:41 PM
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Not necessarily - dealer only replaces what is broken - nothing extra, even if it is right there or a future failure point. Unless otherwise explicitly stated. In your case, you should OK, but a few things may still be left out. 1. chain tensioners and check valve 2. camshaft sensors and magnets.

If they did replace the entire harness, it is possible it may have left the old sensors, which will leak into the harness again. I certainly would not be "more" concerned, it is good repair to have in the history.

Try pushing that dealer to give up service records!!!
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Old Jan 3, 2022 | 09:11 PM
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Thanks OnlyGerman.
The camshaft sensors is easy to replace. I did that on my CLS63 right off the bat.
The good part about buying from Carvana is that I get 7 days to make a decision. So when I get it, I can call them as the owner and get the details of the actual repair.
I also see in the CarFax that there is an entry that says "Computer reprogrammed" at 56K right before being traded in to Carvana... I'll be asking about that too.
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Old Jan 3, 2022 | 09:16 PM
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Originally Posted by ChatWithaNinja
Thanks OnlyGerman.
The camshaft sensors is easy to replace. I did that on my CLS63 right off the bat.
The good part about buying from Carvana is that I get 7 days to make a decision. So when I get it, I can call them as the owner and get the details of the actual repair.
I also see in the CarFax that there is an entry that says "Computer reprogrammed" at 56K right before being traded in to Carvana... I'll be asking about that too.
Great. That is nice piece of mind cushion. They may have replaced the ECU along with that main harness..I would check it all out for signs of oil regardless..

Last edited by OnlyGerman; Jan 3, 2022 at 09:19 PM.
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Old Jan 4, 2022 | 07:11 AM
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Bulletproof? No. Cylinder head replacements don’t come up often on this site.
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Old Jan 4, 2022 | 09:24 AM
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I dont know, maybe it is my own experience. But I would get the engine scoped and a full PPP. It seems the major issue is the cylinder wall, not the head. I spent a ton of time researching the issues when I had a problem a few years ago. Ended up replacing the motor and it turns out the original engine was not assembled correctly.

I had the same issue w records. In fact one person said they would fax them and when it came time, her boss would not let her bc the owners address was on there. I suggest remove it, cut it out, etc they still refused. This would be my primary concern, what you dont know.
There are a multitude of potential issues, I may just be overly sensitive.

I am looking at buying a 2019 now, selling or trading my 2014 in. Great car now, once I replaced the motor and a bunch of other stuff. The "new" one does include all the MB service records interestingly.
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