2020 GLS 450 Front Axel Issue
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GLS 450
2020 GLS 450 Front Axel Issue
2020 GLS 450 started making a thumping noise (not cracking or popping) from the driver side front axel when making sharp turns at slow speeds. Took it to the dealer a few weeks ago and they determined the axel shaft needed to be replaced. After installing the new axel shaft, the problem was not solved. They are now thinking it’s the from differential. Service advisor said it could be a month or so before the parts come in.
Has anyone had any similar issues? If so, what was the fix?
Vehicle currently has 48.5k miles. Service advisor said they would keep the ticket open until the issue is resolved being that I’m so close to being out of warranty.
Has anyone had any similar issues? If so, what was the fix?
Vehicle currently has 48.5k miles. Service advisor said they would keep the ticket open until the issue is resolved being that I’m so close to being out of warranty.
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2020 GLS 450 started making a thumping noise (not cracking or popping) from the driver side front axel when making sharp turns at slow speeds. Took it to the dealer a few weeks ago and they determined the axel shaft needed to be replaced. After installing the new axel shaft, the problem was not solved. They are now thinking it’s the from differential. Service advisor said it could be a month or so before the parts come in.
Has anyone had any similar issues? If so, what was the fix?
Vehicle currently has 48.5k miles. Service advisor said they would keep the ticket open until the issue is resolved being that I’m so close to being out of warranty.
Has anyone had any similar issues? If so, what was the fix?
Vehicle currently has 48.5k miles. Service advisor said they would keep the ticket open until the issue is resolved being that I’m so close to being out of warranty.
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GLS 450
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2021 GLS580 | 2011 ML350 BlueTec | 2009 Pontiac G8 GXP
They're just firing the parts cannon. If they're covering it under warranty I wouldn't worry about it. They'll eventually get it right. Little you can do about it.
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Yup, this is correct. The dealership don't know what is the real cause and they are just throwing whatever and see what sticks (fixes the issue).
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One interesting note: everything was covered under warranty, but since replacing the front diff didn’t fix the problem, they took the new part off and replaced it with the old one. I thought that was interesting.
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I do want to mention that the service writer gives regular updates on where my vehicle is in the process so no complaints there.
One interesting note: everything was covered under warranty, but since replacing the front diff didn’t fix the problem, they took the new part off and replaced it with the old one. I thought that was interesting.
One interesting note: everything was covered under warranty, but since replacing the front diff didn’t fix the problem, they took the new part off and replaced it with the old one. I thought that was interesting.
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2021 GLS580 | 2011 ML350 BlueTec | 2009 Pontiac G8 GXP
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w461/w463
Thought I'd supplement this thread with my own experience.
I'm the original owner of a 2020 GLS450 and now at 49k miles (just a gnat's *** from the warranty's end) the dealer is telling me that the front diff has given up the ghost. Exact same symptoms as Jmac26 described: popping sound from while turning at very low speed although I can't be sure it's coming from the front-end and not more centralized (i.e. transfer case). At higher speed I could detect some bearing noise at various points throughout the throttle range.
The dealer says they diagnosed this with the vehicle in the air and could clearly tell the noise was from the front-end. To make matters more interesting, they just happened to have ANOTHER vehicle in the shop with the same symptoms.
So far they have had my GLS for 4 weeks while diagnosing and awaiting the replacement front diff. They think they will have the job done in a few more days, so we shall see if the front diff is actually to blame on my car.
I'm the original owner of a 2020 GLS450 and now at 49k miles (just a gnat's *** from the warranty's end) the dealer is telling me that the front diff has given up the ghost. Exact same symptoms as Jmac26 described: popping sound from while turning at very low speed although I can't be sure it's coming from the front-end and not more centralized (i.e. transfer case). At higher speed I could detect some bearing noise at various points throughout the throttle range.
The dealer says they diagnosed this with the vehicle in the air and could clearly tell the noise was from the front-end. To make matters more interesting, they just happened to have ANOTHER vehicle in the shop with the same symptoms.
So far they have had my GLS for 4 weeks while diagnosing and awaiting the replacement front diff. They think they will have the job done in a few more days, so we shall see if the front diff is actually to blame on my car.
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w461/w463
Thought I'd supplement this thread with my own experience.
I'm the original owner of a 2020 GLS450 and now at 49k miles (just a gnat's *** from the warranty's end) the dealer is telling me that the front diff has given up the ghost. Exact same symptoms as Jmac26 described: popping sound from while turning at very low speed although I can't be sure it's coming from the front-end and not more centralized (i.e. transfer case). At higher speed I could detect some bearing noise at various points throughout the throttle range.
The dealer says they diagnosed this with the vehicle in the air and could clearly tell the noise was from the front-end. To make matters more interesting, they just happened to have ANOTHER vehicle in the shop with the same symptoms.
So far they have had my GLS for 4 weeks while diagnosing and awaiting the replacement front diff. They think they will have the job done in a few more days, so we shall see if the front diff is actually to blame on my car.
I'm the original owner of a 2020 GLS450 and now at 49k miles (just a gnat's *** from the warranty's end) the dealer is telling me that the front diff has given up the ghost. Exact same symptoms as Jmac26 described: popping sound from while turning at very low speed although I can't be sure it's coming from the front-end and not more centralized (i.e. transfer case). At higher speed I could detect some bearing noise at various points throughout the throttle range.
The dealer says they diagnosed this with the vehicle in the air and could clearly tell the noise was from the front-end. To make matters more interesting, they just happened to have ANOTHER vehicle in the shop with the same symptoms.
So far they have had my GLS for 4 weeks while diagnosing and awaiting the replacement front diff. They think they will have the job done in a few more days, so we shall see if the front diff is actually to blame on my car.
Yesterday morning, my wife takes the car for its first drive and it clearly still exhibits the same symptoms as before. So we had it towed back to the dealer and now they are evaluating the transfer case. I can't believe they let this car leave the shop in this condition.
I also got more info about the other vehicle they had in the shop with same symptoms. That car was a GLE63 and the service tech told me that they swapped the front diff but that didn't fix the problem either. Worth noting that I confirmed in EPC that my GLS450 shares the same front diff part number as a GLE63.
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Ok, so it's been a month since I posted. Finally got the car back home just 2 days ago after they replaced the front differential. The dealer says they test drove and were confident it was fixed. They even delivered the car to me which is a nice courtesy considering I live 90 minutes away.
Yesterday morning, my wife takes the car for its first drive and it clearly still exhibits the same symptoms as before. So we had it towed back to the dealer and now they are evaluating the transfer case. I can't believe they let this car leave the shop in this condition.
I also got more info about the other vehicle they had in the shop with same symptoms. That car was a GLE63 and the service tech told me that they swapped the front diff but that didn't fix the problem either. Worth noting that I confirmed in EPC that my GLS450 shares the same front diff part number as a GLE63.
Yesterday morning, my wife takes the car for its first drive and it clearly still exhibits the same symptoms as before. So we had it towed back to the dealer and now they are evaluating the transfer case. I can't believe they let this car leave the shop in this condition.
I also got more info about the other vehicle they had in the shop with same symptoms. That car was a GLE63 and the service tech told me that they swapped the front diff but that didn't fix the problem either. Worth noting that I confirmed in EPC that my GLS450 shares the same front diff part number as a GLE63.
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GLS 450
Thought I'd supplement this thread with my own experience.
I'm the original owner of a 2020 GLS450 and now at 49k miles (just a gnat's *** from the warranty's end) the dealer is telling me that the front diff has given up the ghost. Exact same symptoms as Jmac26 described: popping sound from while turning at very low speed although I can't be sure it's coming from the front-end and not more centralized (i.e. transfer case). At higher speed I could detect some bearing noise at various points throughout the throttle range.
The dealer says they diagnosed this with the vehicle in the air and could clearly tell the noise was from the front-end. To make matters more interesting, they just happened to have ANOTHER vehicle in the shop with the same symptoms.
So far they have had my GLS for 4 weeks while diagnosing and awaiting the replacement front diff. They think they will have the job done in a few more days, so we shall see if the front diff is actually to blame on my car.
I'm the original owner of a 2020 GLS450 and now at 49k miles (just a gnat's *** from the warranty's end) the dealer is telling me that the front diff has given up the ghost. Exact same symptoms as Jmac26 described: popping sound from while turning at very low speed although I can't be sure it's coming from the front-end and not more centralized (i.e. transfer case). At higher speed I could detect some bearing noise at various points throughout the throttle range.
The dealer says they diagnosed this with the vehicle in the air and could clearly tell the noise was from the front-end. To make matters more interesting, they just happened to have ANOTHER vehicle in the shop with the same symptoms.
So far they have had my GLS for 4 weeks while diagnosing and awaiting the replacement front diff. They think they will have the job done in a few more days, so we shall see if the front diff is actually to blame on my car.
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From: Houston
2021 GLS 450 & 23 GLS 450. Have a Holden Commodore, Jeep, truck, and more
I have had a similar issue and also had the CV axle replaced. It did not fix it and I need to take it back in. I can also feel it a bit like something is binding.
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GLS 450
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Planned: GLS450, Former: SLK280, GLK250
Has anyone found a solution to this problem? We're in the market for a 2021/2022 GLS450 and currently driving a 2020 with ~88K miles. I definitely notice the popping/knocking from the front axle while turning at slow speeds. Thankfully this is a rental car, but it seems like this car is afflicted with the same issue.
It'd be good to know the source of this issue so we can anticipate it with whichever GLS we end up buying.
It'd be good to know the source of this issue so we can anticipate it with whichever GLS we end up buying.
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From: California
2024 GLS 450
My 2024 GLS had the knocking sound when I brake with on slow speeds or make a stop while turning. The dealership fixed it by replacing the steering coupler.
My service advisor was aware of this problem and he immediately said, we will take care of it. It appears to be an updated part for this issue which they ordered and replaced in a day. Hope this helps.
My service advisor was aware of this problem and he immediately said, we will take care of it. It appears to be an updated part for this issue which they ordered and replaced in a day. Hope this helps.
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w461/w463
My 2020 is still at the dealer while they try (very slowly) to figure this out. It has been 3 months now. They have tried to replace the front differential, drain/refill transfer case fluid, replace the steering coupler, and the latest attempt involved replacing the front axle CV shaft(s) -- I'm not sure if they tried both sides or just one.
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w461/w463
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'21 AMG53 wDPP & ARC, 19 GLC300 - Former-03 C240,2 ML BlueTecs,20 GLE450 E-ABC,15 Cayenne D,17 Macan
What was the cost of the repair? Did you have an Extended Warranty or Service Policy? Mileage?
Unlike you, I abuse my AWD at the track and off road, and I'll be facing a "Keep, with Service Policy or Replace" decision when my warranty expires next March. I'm watching 2020 & 2021 issues as the cars gain miles.
Last edited by mikapen; Dec 11, 2024 at 05:42 PM.
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w461/w463
That's bad, but good that it's fixed.
What was the cost of the repair? Did you have an Extended Warranty or Service Policy? Mileage?
Unlike you, I abuse my AWD at the track and off road, and I'll be facing a "Keep, with Service Policy or Replace" decision when my warranty expires next March. I'm watching 2020 & 2021 issues as the cars gain miles.
What was the cost of the repair? Did you have an Extended Warranty or Service Policy? Mileage?
Unlike you, I abuse my AWD at the track and off road, and I'll be facing a "Keep, with Service Policy or Replace" decision when my warranty expires next March. I'm watching 2020 & 2021 issues as the cars gain miles.
