Engine Mount
Senior Member
Joined: Jul 2023
Posts: 296
Likes: 91
S550 V8, CL600 V12, SLK32 AMG
I have not done it, but got prices from $1000 to $2000. The $2000 is with OEM mounts from a shop that only does Mercedes. Will go there eventually.
Mine is is only RWD though. AWD cars would be more.
Mine is is only RWD though. AWD cars would be more.
Junior Member
Joined: Jul 2012
Posts: 58
Likes: 29
From: Southern California
Mercedes S550
Hope that helps.
Senior Member
Joined: Mar 2010
Posts: 290
Likes: 48
From: Florida
2013 ML350, 2019 S560
MBWorld Fanatic!
Joined: Dec 2011
Posts: 4,372
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W212 FL
However careful you drive or baby the car , those components need to be replaced when they're due as well.
Junior Member
Joined: Jul 2012
Posts: 58
Likes: 29
From: Southern California
Mercedes S550
On my 2015 s550, I went to the dealer on a sunroof issue, and they went over the vehicle to check everything. They came up with the engine mounts, transmission mounts and a leaky coolant bottle. I bought all of the components on eBay, and had them installed at Pep Boys. All worked great.
I had some clunking, when I went over bumps. That was the only sign that something was wrong. All better now.
I had some clunking, when I went over bumps. That was the only sign that something was wrong. All better now.
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Member
Joined: Nov 2009
Posts: 245
Likes: 244
'20 GLS450, '17 S550 Sedan
Failed Motor Mounts -- How Can You Tell?
In any case, the three main symptoms were always the same.
1- No longer smooth at idle. Almost felt like the engine was misfiring. In fact, the first time it happened, when I stopped at a red light and immediately noticed the rough idle, I instinctively looked down expecting to find the "Check Engine" light illuminated, since it felt exactly like an engine misfire.
2- No longer a smooth engine startup. Instead, every time the engine was started, I could feel the engine "bottoming out" (for lack of a better term) on the frame, since there was no longer a functioning engine mount there to cushion it.
3- When driving over even moderate bumps, the engine would again feel like it was "bottoming out" on the frame, which meant that the front end of the vehicle was very busy, up and down, on all but the smoothest roads. Aside from being annoying, this also occasionally lead to a feeling of serious instability, especially at freeway speeds. Generally, the front of the car felt like it was no longer "tied down."
Hope this helps!
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MBWorld Fanatic!
Joined: Dec 2011
Posts: 4,372
Likes: 945
W212 FL
I've dealt with failed engine mounts three times. Once on a W212 (E550), and twice on the same W166 (ML550). Both vehicles had the M278 engine... not sure if that one is more prone to premature failure. Haven't dealt with it yet on my W222.
In any case, the three main symptoms were always the same.
1- No longer smooth at idle. Almost felt like the engine was misfiring. In fact, the first time it happened, when I stopped at a red light and immediately noticed the rough idle, I instinctively looked down expecting to find the "Check Engine" light illuminated, since it felt exactly like an engine misfire.
2- No longer a smooth engine startup. Instead, every time the engine was started, I could feel the engine "bottoming out" (for lack of a better term) on the frame, since there was no longer a functioning engine mount there to cushion it.
3- When driving over even moderate bumps, the engine would again feel like it was "bottoming out" on the frame, which meant that the front end of the vehicle was very busy, up and down, on all but the smoothest roads. Aside from being annoying, this also occasionally lead to a feeling of serious instability, especially at freeway speeds. Generally, the front of the car felt like it was no longer "tied down."
Hope this helps!
In any case, the three main symptoms were always the same.
1- No longer smooth at idle. Almost felt like the engine was misfiring. In fact, the first time it happened, when I stopped at a red light and immediately noticed the rough idle, I instinctively looked down expecting to find the "Check Engine" light illuminated, since it felt exactly like an engine misfire.
2- No longer a smooth engine startup. Instead, every time the engine was started, I could feel the engine "bottoming out" (for lack of a better term) on the frame, since there was no longer a functioning engine mount there to cushion it.
3- When driving over even moderate bumps, the engine would again feel like it was "bottoming out" on the frame, which meant that the front end of the vehicle was very busy, up and down, on all but the smoothest roads. Aside from being annoying, this also occasionally lead to a feeling of serious instability, especially at freeway speeds. Generally, the front of the car felt like it was no longer "tied down."
Hope this helps!
Thread Starter
Member
Joined: Feb 2021
Posts: 204
Likes: 52
From: Lower Westchester, NY
2018 s560v4
Thanks for the feedback.
It seems that my issue isn’t a mount based upon others experiences.
I feel a vibration only on the steering wheel only at idle. It’s like a buzzing electric razor feel. It comes and goes meaning I don’t feel it on some days verses the next day.
It seems that my issue isn’t a mount based upon others experiences.
I feel a vibration only on the steering wheel only at idle. It’s like a buzzing electric razor feel. It comes and goes meaning I don’t feel it on some days verses the next day.
MBWorld Fanatic!
Joined: Jun 2015
Posts: 9,051
Likes: 4,557
From: Maryland
2024 S580
Thanks for the feedback.
It seems that my issue isn’t a mount based upon others experiences.
I feel a vibration only on the steering wheel only at idle. It’s like a buzzing electric razor feel. It comes and goes meaning I don’t feel it on some days verses the next day.
It seems that my issue isn’t a mount based upon others experiences.
I feel a vibration only on the steering wheel only at idle. It’s like a buzzing electric razor feel. It comes and goes meaning I don’t feel it on some days verses the next day.
MBWorld Fanatic!
Joined: Jun 2015
Posts: 9,051
Likes: 4,557
From: Maryland
2024 S580
If you do some searching on the forum you’ll see posts about it. Many 4Matic 560 cars develop a vibration at idle, does it go away when you put it in neutral?
I had the dealer and my independent mechanic thoroughly check the motor mounts and they are fine, both confirmed that this happens with many cars.
I had the dealer and my independent mechanic thoroughly check the motor mounts and they are fine, both confirmed that this happens with many cars.
MBWorld Fanatic!
Joined: Oct 2002
Posts: 4,975
Likes: 1,343
From: Cincinnati
2010 E350 4Matic
Thread Starter
Member
Joined: Feb 2021
Posts: 204
Likes: 52
From: Lower Westchester, NY
2018 s560v4
Super Member
Joined: Oct 2011
Posts: 697
Likes: 238
From: Illinois
S560/SL550/LS460/Q70L 5.6 AWD
So, totally confused, the vibration wasn't there until 30,000 miles but it is there after and the dealer and "some" mechanics are saying that the is normal?
It came from where ?
It came from where ?
MBWorld Fanatic!
Joined: Jun 2015
Posts: 9,051
Likes: 4,557
From: Maryland
2024 S580
Theres clearly something that causes it, but it’s not something that’s easily diagnosable or easily repairable is the point. It’s not motor or transmission mounts…and it seems to only occur in 4Matic cars.
Newbie
Joined: Oct 2024
Posts: 2
Likes: 0
From: Georgia USA
S560
S560 4matic Thermostat recall/campaign
I took my 2020 S560 to the dealership to have thermostat recall completed. After getting the car back I felt a thud under acceleration. I took it back and the tech said the driver side engine mount was broken. I looked at it and it was certainly broken. Hard to believe the mount broke on a 2020 with less than 50K miles. I think the mount was removed to facilitate other maintenance and was never replaced properly.
MBWorld Fanatic!
Joined: Oct 2002
Posts: 4,975
Likes: 1,343
From: Cincinnati
2010 E350 4Matic
Seriously? Replacing the thermostat on an S560 is a huge job that requires undoing motor mounts? Reminds me of a friend of mine who's thermostat on his GM truck went out on the way to Yellowstone and it was a two day affair to replace and him wondering what genius thought that was good idea?
Last edited by MBNUT1; Oct 31, 2024 at 03:49 PM.
