My 2021 AMG GLS 63 engine failed with only 1000 miles.
Thread Starter
Newbie
Joined: May 2021
Posts: 3
Likes: 3
2021 Mercedes AMG GLS 63
My 2021 AMG GLS 63 engine failed with only 1000 miles.
Hello!
I’m new to the forums and to Mercedes. Mercedes is in the process of buying back my GLS 63 after the engine failed with just 1000 miles on the odometer. They are telling me that this is a freak occurrence with no other reports of this happening.
They originally said they thought that it was the hybrid battery. They replaced it twice. They then said it was possibly the ECM. They replaced it as well. Three weeks later they tell me that there is metal in the oil and that the motor as seized. I’m not sure how or why it took so long to diagnose the engine failure.
There was zero warning when it just shutoff on me while driving on the highway.
My questions are: Has anyone seen or heard of this happening so soon? And, would you reorder another one or look at something else to replace it?
I’m new to the forums and to Mercedes. Mercedes is in the process of buying back my GLS 63 after the engine failed with just 1000 miles on the odometer. They are telling me that this is a freak occurrence with no other reports of this happening.
They originally said they thought that it was the hybrid battery. They replaced it twice. They then said it was possibly the ECM. They replaced it as well. Three weeks later they tell me that there is metal in the oil and that the motor as seized. I’m not sure how or why it took so long to diagnose the engine failure.
There was zero warning when it just shutoff on me while driving on the highway.
My questions are: Has anyone seen or heard of this happening so soon? And, would you reorder another one or look at something else to replace it?
Out Of Control!!
Joined: Nov 2018
Posts: 11,400
Likes: 5,324
From: San Francisco Bay Area
2019 C63CS
Sorry this happened. The M177 is overall a very solid engine and is in use throughout the entire AMG 63 range, so it has lots of real world mileage on it in the meantime. There's occasionally a bad one coming from the factory with some issues, and looks like you got one of them, but I wouldn't hesitate one bit to reorder.
Thread Starter
Newbie
Joined: May 2021
Posts: 3
Likes: 3
2021 Mercedes AMG GLS 63
Sorry this happened. The M177 is overall a very solid engine and is in use throughout the entire AMG 63 range, so it has lots of real world mileage on it in the meantime. There's occasionally a bad one coming from the factory with some issues, and looks like you got one of them, but I wouldn't hesitate one bit to reorder.
Thanks so much for the feedback!
Super Member
Joined: Nov 2013
Posts: 762
Likes: 166
From: Oregon USA
2023 Mercedes EQS 580 SUV, 2023 Bentley Bentayga, 2023 Genesis GV60
I have always worried about my M177. It runs so hot that the fan will stay on for ten minutes after even a leisurely drive. Now keeping my fingers crossed.
I had one in my 2019 S63 Cab too, but sold that car after 12K miles due to the terrible MCT transmission.
I had one in my 2019 S63 Cab too, but sold that car after 12K miles due to the terrible MCT transmission.
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Out Of Control!!
Joined: Nov 2018
Posts: 11,400
Likes: 5,324
From: San Francisco Bay Area
2019 C63CS
That's just to cool the turbochargers inside of the Hot-V, so they don't heat soak. All turbochargers get very hot, but with the Hot-V arrangement all the heat is concentrated inside of the V, so after you park and the turbochargers are hot it'll run the fan to cool them. Very common behavior on all engines with a Hot-V setup.
Last edited by superswiss; May 17, 2021 at 09:41 AM.
Member
Joined: May 2021
Posts: 79
Likes: 27
‘21 GLS63, '23 GLE63s
My ‘21 GLS63 has been in the shop twice now for a Check Engine light. Once at 1900 miles and again last week at 3800 miles.
The first time the dealer had the vehicle for 2 weeks. The code was for a reoccurring mis fire. They ran numerous tests and put 400 miles on it while trying to diagnose. They ended up replacing one of the turbo exhaust clips that was leaking and called it fixed.
Last week it came on again for the same issue (Cylinder misfire (4)). This time they went straight to MBUSA and bypassed some of the diagnosis and there is a new software update to take care of the fuel trim levels. It’s not a public release yet but came straight from the PTSS case.
After 250 miles on the road and three days in the shop they declared victory.
So far it has worked as advertised since the last update. Fingers crossed that this solves it for good.
The rumor from my shop foreman was that MB already had to detune the engine for US Regulations and fuel mixes and apparently it wasn’t quite enough so this new software update is taking that into account.
The first time the dealer had the vehicle for 2 weeks. The code was for a reoccurring mis fire. They ran numerous tests and put 400 miles on it while trying to diagnose. They ended up replacing one of the turbo exhaust clips that was leaking and called it fixed.
Last week it came on again for the same issue (Cylinder misfire (4)). This time they went straight to MBUSA and bypassed some of the diagnosis and there is a new software update to take care of the fuel trim levels. It’s not a public release yet but came straight from the PTSS case.
After 250 miles on the road and three days in the shop they declared victory.
So far it has worked as advertised since the last update. Fingers crossed that this solves it for good.
The rumor from my shop foreman was that MB already had to detune the engine for US Regulations and fuel mixes and apparently it wasn’t quite enough so this new software update is taking that into account.
Junior Member
Joined: Sep 2013
Posts: 44
Likes: 18
2021 GLS 63 2014 GL550
My ‘21 GLS63 has been in the shop twice now for a Check Engine light. Once at 1900 miles and again last week at 3800 miles.
The first time the dealer had the vehicle for 2 weeks. The code was for a reoccurring mis fire. They ran numerous tests and put 400 miles on it while trying to diagnose. They ended up replacing one of the turbo exhaust clips that was leaking and called it fixed.
Last week it came on again for the same issue (Cylinder misfire (4)). This time they went straight to MBUSA and bypassed some of the diagnosis and there is a new software update to take care of the fuel trim levels. It’s not a public release yet but came straight from the PTSS case.
After 250 miles on the road and three days in the shop they declared victory.
So far it has worked as advertised since the last update. Fingers crossed that this solves it for good.
The rumor from my shop foreman was that MB already had to detune the engine for US Regulations and fuel mixes and apparently it wasn’t quite enough so this new software update is taking that into account.
The first time the dealer had the vehicle for 2 weeks. The code was for a reoccurring mis fire. They ran numerous tests and put 400 miles on it while trying to diagnose. They ended up replacing one of the turbo exhaust clips that was leaking and called it fixed.
Last week it came on again for the same issue (Cylinder misfire (4)). This time they went straight to MBUSA and bypassed some of the diagnosis and there is a new software update to take care of the fuel trim levels. It’s not a public release yet but came straight from the PTSS case.
After 250 miles on the road and three days in the shop they declared victory.
So far it has worked as advertised since the last update. Fingers crossed that this solves it for good.
The rumor from my shop foreman was that MB already had to detune the engine for US Regulations and fuel mixes and apparently it wasn’t quite enough so this new software update is taking that into account.
Member
Joined: May 2021
Posts: 79
Likes: 27
‘21 GLS63, '23 GLE63s
I had the exact same issue with my '21 GLS63. It was in the shop for 5 weeks diagnosing the check engine light that was apparently due to misfires on cylinders 1 and 4. Mercedes-Benz was starting the buy back process when miraculously they were able to correct it...The car now has 1,100 mile on it and the check engine light has behaved.
Senior Member
Joined: May 2019
Posts: 330
Likes: 119
From: Tennessee
2015 MB S550 & 2020 MB GLS 450
Don't mean to hijack thread, just want an education......if they buy back the vehicle and you want another, does MB just replace with the same spec vehicle or do you have to negotiate a buy back price, then go through purchase negotiation process again?
Member
Joined: Nov 2016
Posts: 126
Likes: 108
From: CA
GLS450 (2026), EQE350+ (2024)
They just give you a check for what you paid for the car and you are free to use it for whatever you want. If planning to use it to buy another MB, you will need to start from scratch like any other customer.
Out Of Control!!
Joined: Nov 2018
Posts: 11,400
Likes: 5,324
From: San Francisco Bay Area
2019 C63CS
I've never gone through the process myself, but from what I've heard it depends. I've heard cases where they replaced the car with an equivalent spec and no money changed hands. Other situations are as described above where they send you a check. Depending on how long you had the car they will deduct the use of the car you had and you may need to negotiate. It's also not guaranteed that you get back the sales taxes if you paid it upfront. A buy back is not always desirable, especially if you end up losing the sales tax and then have to pay sales tax again on the replacement car.
MBWorld Fanatic!
Joined: Oct 2014
Posts: 4,524
Likes: 1,181
From: WI
17 E43; 21 GLS580
That's just to cool the turbochargers inside of the Hot-V, so they don't heat soak. All turbochargers get very hot, but with the Hot-V arrangement all the heat is concentrated inside of the V, so after you park and the turbochargers are hot it'll run the fan to cool them. Very common behavior on all engines with a Hot-V setup.
Newbie
Joined: Dec 2021
Posts: 3
Likes: 0
gls 550
GLS 550 seized engine
Hello!
I’m new to the forums and to Mercedes. Mercedes is in the process of buying back my GLS 63 after the engine failed with just 1000 miles on the odometer. They are telling me that this is a freak occurrence with no other reports of this happening.
They originally said they thought that it was the hybrid battery. They replaced it twice. They then said it was possibly the ECM. They replaced it as well. Three weeks later they tell me that there is metal in the oil and that the motor as seized. I’m not sure how or why it took so long to diagnose the engine failure.
There was zero warning when it just shutoff on me while driving on the highway.
My questions are: Has anyone seen or heard of this happening so soon? And, would you reorder another one or look at something else to replace it?
I’m new to the forums and to Mercedes. Mercedes is in the process of buying back my GLS 63 after the engine failed with just 1000 miles on the odometer. They are telling me that this is a freak occurrence with no other reports of this happening.
They originally said they thought that it was the hybrid battery. They replaced it twice. They then said it was possibly the ECM. They replaced it as well. Three weeks later they tell me that there is metal in the oil and that the motor as seized. I’m not sure how or why it took so long to diagnose the engine failure.
There was zero warning when it just shutoff on me while driving on the highway.
My questions are: Has anyone seen or heard of this happening so soon? And, would you reorder another one or look at something else to replace it?
Last edited by LindseyTX; Dec 20, 2021 at 05:11 PM.
MBWorld Fanatic!
Joined: Jun 2017
Posts: 1,333
Likes: 766
2020 GLS450 (wife) / 2024 Ford Bronco (mine) / 2014 VW Tiquan (son)
I’ve come to the conclusion that anything AMG related is something to avoid with MB. My neighbor had a E63s whereby the engine essentially destroyed itself around 15k miles, and now this, and my 2014 E350 sedan has the AMG 18” wheels that bend at the slightest sneeze. I simply won’t buy or spec out a MB with AMG parts anymore. And the drilled brake rotors, don’t even get me started…
Out Of Control!!
Joined: Sep 2018
Posts: 14,666
Likes: 4,568
From: unbegrenzt
2017 GLE350 4MATIC
MB has genealogy between engines as most manufacturers do. One example is the current M264, which shares a large number of important parts with the M274 which is becoming increasingly known for fatal piston cracking.
The M17x could be an example where the fatal cylinder scuffing behavior of the earlier M157/M278 has been passed down to the latest M17x.
Hope to get clear root cause information from any M17x low mileage failures.
Piston cracking and cylinder scuffing are examples where it’s too easy for the manufacturer to skimp on cost with unfortunate consequences for the customer.
The M17x could be an example where the fatal cylinder scuffing behavior of the earlier M157/M278 has been passed down to the latest M17x.
Hope to get clear root cause information from any M17x low mileage failures.
Piston cracking and cylinder scuffing are examples where it’s too easy for the manufacturer to skimp on cost with unfortunate consequences for the customer.
Out Of Control!!
Joined: Apr 2019
Posts: 11,922
Likes: 6,775
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
AMG... OMG!
I’ve come to the conclusion that anything AMG related is something to avoid with MB. My neighbor had a E63s whereby the engine essentially destroyed itself around 15k miles, and now this, and my 2014 E350 sedan has the AMG 18” wheels that bend at the slightest sneeze. I simply won’t buy or spec out a MB with AMG parts anymore. And the drilled brake rotors, don’t even get me started…
This seems related to the way the engine oil pressure is managed by the ECU.
Of course uncontrolled batches of pistons with bad alloys and extra thin oil all contribute to rush the outcome.
The best or nothing!
Last edited by CaliBenzDriver; Dec 30, 2021 at 01:30 PM.
Newbie
Joined: Feb 2024
Posts: 1
Likes: 0
GLS 63
2024 AMG GLS 63 engine misfire less than 1000 miles
I've never gone through the process myself, but from what I've heard it depends. I've heard cases where they replaced the car with an equivalent spec and no money changed hands. Other situations are as described above where they send you a check. Depending on how long you had the car they will deduct the use of the car you had and you may need to negotiate. It's also not guaranteed that you get back the sales taxes if you paid it upfront. A buy back is not always desirable, especially if you end up losing the sales tax and then have to pay sales tax again on the replacement car.
I got the check engine light and wasn’t worried until they told me today it was mid fire and then I came here. I love the vehicle. And even got an update from 23-24. I’m anxiously awaiting to hear what they find.
