Engine Mounts
Thread Starter
Super Member
Joined: Jan 2009
Posts: 566
Likes: 261
From: In The Woods
2019 W222 S560 4Matic/2025 Yukon Denali
Engine Mounts
Hi,
A couple of questions.
I have about 107k on the clock of my 19 S560.
1) Do the motor mounts have fluid inside of them that would leak out when they go 'bad'.
2) It looks like I can get to the mounts if I take off the cats....why does everyone say you have to remove the whole motor out of the car?
A couple of questions.
I have about 107k on the clock of my 19 S560.
1) Do the motor mounts have fluid inside of them that would leak out when they go 'bad'.
2) It looks like I can get to the mounts if I take off the cats....why does everyone say you have to remove the whole motor out of the car?
Super Member
Joined: Jun 2003
Posts: 713
Likes: 147
From: Aridzona
'15 S550, '10 E350 P1/P2, '02 ML320
Hi,
A couple of questions.
I have about 107k on the clock of my 19 S560.
1) Do the motor mounts have fluid inside of them that would leak out when they go 'bad'.
2) It looks like I can get to the mounts if I take off the cats....why does everyone say you have to remove the whole motor out of the car?
A couple of questions.
I have about 107k on the clock of my 19 S560.
1) Do the motor mounts have fluid inside of them that would leak out when they go 'bad'.
2) It looks like I can get to the mounts if I take off the cats....why does everyone say you have to remove the whole motor out of the car?
- I haven't done it yet, but the procedure is much like what you have above, see attachment for factory instructions. (Note: these are for the 2WD chassis, not 4MATIC)
- Also for anyone doing this on the M278/M157 engine, see the special part you'll need or need to create one if you are so inlcined. The front lifting eye which has been on every one of the 15 previous Mercedes I've owned is now an optional part! Part number is 278589004000.
- For the engine hoist I've found the Harbor Freight Engine Lift works very well, which is fantastic considering the Mercedes tool is $1k+.
- For the M176 motor in your S560, see those specific instructions below. There is a special lifting tool you'll need for that as well, p/n 177589006200.
Last edited by dlafever; Dec 17, 2025 at 07:58 AM.
Super Member
Joined: Jun 2025
Posts: 784
Likes: 249
From: USA
Hi,
A couple of questions.
I have about 107k on the clock of my 19 S560.
1) Do the motor mounts have fluid inside of them that would leak out when they go 'bad'.
2) It looks like I can get to the mounts if I take off the cats....why does everyone say you have to remove the whole motor out of the car?
A couple of questions.
I have about 107k on the clock of my 19 S560.
1) Do the motor mounts have fluid inside of them that would leak out when they go 'bad'.
2) It looks like I can get to the mounts if I take off the cats....why does everyone say you have to remove the whole motor out of the car?
On that car, you absolutely do not have to pull the whole engine. That's an old-school scare tactic or a lazy shop. With the right tools and by dropping the subframe, they can be done in place. It's a big job, but a full removal is overkill. Get a second opinion from a good independent Mercedes specialist.
Member
Joined: Oct 2015
Posts: 136
Likes: 29
2015 S600, 2014 E550 4-Matic
Yes, they're hydraulic and leak fluid when bad. You see oily wetness.
On that car, you absolutely do not have to pull the whole engine. That's an old-school scare tactic or a lazy shop. With the right tools and by dropping the subframe, they can be done in place. It's a big job, but a full removal is overkill. Get a second opinion from a good independent Mercedes specialist.
On that car, you absolutely do not have to pull the whole engine. That's an old-school scare tactic or a lazy shop. With the right tools and by dropping the subframe, they can be done in place. It's a big job, but a full removal is overkill. Get a second opinion from a good independent Mercedes specialist.
Super Member
Joined: Mar 2019
Posts: 573
Likes: 179
From: Half Moon Bay, CA
2016 S550e, 2005 Nissan Xterra 4x4, 1984 300ZX
Mine failed at 47k on 16', I wasn't at all noticing anything but was identified by MB service inspection while replacing my AC compressor. It was under extended warranty but was over 2k for the job at the most expensive MB shop in the world (sic) $329 per hour! I do now notice it is a little smoother; the dealership service writer told me this is a 10-year replacement on most S-Class cars. I would have refused the job if it wasn't under warranty, but the warranty company inspected the car and approved the service so they must have been pretty bad.
Super Member
Joined: Jun 2025
Posts: 784
Likes: 249
From: USA
On my 2003 W220 S600, the first step in WIS to replace the motor mounts was to remove the engine. This was before they re-designed the mounts for easier service. Even on that car, I was able to replace the mounts by lowering the subframe and supporting the engine from above (I have a 2 post lift). On the W222, you could nearly replace the mounts without lowering the subframe, but it appears access to one of the bolts is blocked by the subframe. I plan to replace the mounts on my W222 next week (my car has ~100K and has a slight vibration at idle). The mounts don't look bad, but they're notorious for having a short life (Tasos on Youtube has some good examples of completely failed mounts with less than 100K kilometers).
MBWorld Fanatic!
Joined: Feb 2012
Posts: 2,641
Likes: 1,224
From: Phoenix
222 S-65
You've got the right idea. On the W222, you absolutely do not need to pull the engine. You will need to support the engine from above and lower the subframe just a few inches to get proper access and clearance for that one blocked bolt. It's a tight job, but a straightforward extension of what you did on the W220. Your plan is solid.
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2015 S600, 2014 E550 4-Matic
It's good to know I probably won't collapse the oil pan if I support the engine from below. I will check WIS to see if I need to make any alignment pins for reassembling the subframe like on the W220. I can print something the correct size over the holidays.
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MBWorld Fanatic!
Joined: Feb 2012
Posts: 2,641
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From: Phoenix
222 S-65
I fashioned a length of 2X4 with holes drilled into it for the ‘teeth’ of the screwjack to mate up with (locates the 2X4) that is long enough to spread the load at the front of the oil pan for my V-12 powered car. Haven’t damaged anything and makes it very easy. Please note that a second screwjack or a transmission jack is needed to lift the subframe back up in place.
221 and 222 cars will have the subframe back exactly in place just by snugging up the fasteners. Per MB they are all torque to yield. I’ve never replaced them. They are never loose.
221 and 222 cars will have the subframe back exactly in place just by snugging up the fasteners. Per MB they are all torque to yield. I’ve never replaced them. They are never loose.
Last edited by JohnLane; Dec 25, 2025 at 01:33 AM.
Member
Joined: Oct 2015
Posts: 136
Likes: 29
2015 S600, 2014 E550 4-Matic
The motor mount replacement was a success. There were a few things that took a few extra minutes to manage, such as lining up the cooling package into the front of the subframe, and prying the rear of the subframe loose from the body (Mine was really stuck on the driver's side). Also, don't forget to separate the cable trays for the ABS sensors from the subframe or body side. The steering shaft wasn't too difficult to remove, and the mounts came out without too much trouble. It's definitely not a job for someone new to vehicle maintenance. Start to finish was about 3.5 hours.
Thread Starter
Super Member
Joined: Jan 2009
Posts: 566
Likes: 261
From: In The Woods
2019 W222 S560 4Matic/2025 Yukon Denali
Just to clarify. if you have the M176 motor I dont think you can drop the subframe.
has anyone on here had experience with doing the mounts on the M176?
correct me if I am wrong.
i just picked up new mounts from MB so I am ready to get to work.
I keep reading and hearing that you have to take the motor out.
anyone with experience on the 4.0?
thanks
has anyone on here had experience with doing the mounts on the M176?
correct me if I am wrong.
i just picked up new mounts from MB so I am ready to get to work.
I keep reading and hearing that you have to take the motor out.
anyone with experience on the 4.0?
thanks
Last edited by vinflouen; Jan 11, 2026 at 08:28 PM.
