2019 S560 4.0 Engine Mounts
Out Of Control!!
Joined: Apr 2019
Posts: 11,923
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From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
mounts vs. shaft bearings
yeah the transmission mount is much easier and requires way less tools and it goes out sooner, it's preventing twist and maintaining the correct driveline angle. but really the carrier bearing would be the one that takes the bearing after the transmission mount goes out but usually I replace them as a trio anyway along with potentially the flex discs if the customer wants to pay
The more you nurse "old mounts are good enough" the more...:
- prop shaft angle works u-joints needle bearings
- rubber flex discs and
- carrier bearing rubber cradle.
- Shaft vibrations work out bearing at both ends
It's better to deal with mounts at least tranny to preserve prop.shaft setup.
Last edited by CaliBenzDriver; May 31, 2025 at 03:31 AM.
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From: San Jose, CA
11 E550, 16 AMG GTS, 13 S550
I mean I've seen every single car in the worst state of repair possible up to the S65 AMG. I wouldn't say it's an emergency, most of these don't see real parts-out service til about 100-120k unless something gets broken through hard use so I wouldn't propagate that the trans mount is some kind of emergency but the rationale makes sense.
All this stuff is meant to be consumeable, just let the car eat parts and fix it when its broken otherwise it keeps you up at night
All this stuff is meant to be consumeable, just let the car eat parts and fix it when its broken otherwise it keeps you up at night
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That is the key right there!
The more you nurse "old mounts are good enough" the more...:
It's better to deal with mounts at least tranny to preserve prop.shaft setup.
The more you nurse "old mounts are good enough" the more...:
- prop shaft angle works u-joints needle bearings
- rubber flex discs and
- carrier bearing rubber cradle.
- Shaft vibrations work out bearing at both ends
It's better to deal with mounts at least tranny to preserve prop.shaft setup.
I mean I've seen every single car in the worst state of repair possible up to the S65 AMG. I wouldn't say it's an emergency, most of these don't see real parts-out service til about 100-120k unless something gets broken through hard use so I wouldn't propagate that the trans mount is some kind of emergency but the rationale makes sense.
All this stuff is meant to be consumeable, just let the car eat parts and fix it when its broken otherwise it keeps you up at night
All this stuff is meant to be consumeable, just let the car eat parts and fix it when its broken otherwise it keeps you up at night
MBWorld Fanatic!
Joined: Feb 2012
Posts: 2,611
Likes: 1,209
From: Phoenix
222 S-65
Absolutely! As for when.... TBD. 11 years and counting in my car. They look fine with zero indication they are about to fail.
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From: San Jose, CA
11 E550, 16 AMG GTS, 13 S550
Uh every W212 owner that isn't on MBworld has original engine mounts. The trans mount is probably gone around 120 but engine mounts on the 221 and 212 generation of cars are very robust. Mine was cracked at 120 but I did my engine mounts at 140 and they were both fine! They were a tad shorter but no noise and didn't improve NVH one bit. I have cracks in my flex disc right now at 170 and I can't really feel em. I do the repair all the time so I what fresh ones feel like.
They were not fantastic around the 211/220 era but again those cars were older and parts/service were way cheaper in that time. If you wanna know a fun tidbit about my body of knowledge I was THERE when aircooled 911's were like $10,000 growing helping out at a local shop here. I could tell you how to repair 70's-90's 911's before I ever worked on my own cars. I eventually went on to become an MB SA and I didn't reconnect with the brand til much later due to personal gripes I had. Tells you how much I love MB at the end of the day
I figure the latest ones might go to 150k honestly. The trans mount is weak because its technically suspending the transmission and therefore its mostly hollow space, if it was solid rubber all the way through youd have less comfort so its one of those provisions for driver's comfort. It's a $20 part though.
They were not fantastic around the 211/220 era but again those cars were older and parts/service were way cheaper in that time. If you wanna know a fun tidbit about my body of knowledge I was THERE when aircooled 911's were like $10,000 growing helping out at a local shop here. I could tell you how to repair 70's-90's 911's before I ever worked on my own cars. I eventually went on to become an MB SA and I didn't reconnect with the brand til much later due to personal gripes I had. Tells you how much I love MB at the end of the day
I figure the latest ones might go to 150k honestly. The trans mount is weak because its technically suspending the transmission and therefore its mostly hollow space, if it was solid rubber all the way through youd have less comfort so its one of those provisions for driver's comfort. It's a $20 part though.
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Purchase Amsoil at 25% off from me
Chris Tran, Retired Alpha European Autotech Owner
Amsoil Independent Dealer #7236674
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MBWorld God!
Joined: Dec 2019
Posts: 32,222
Likes: 6,281
Uh every W212 owner that isn't on MBworld has original engine mounts. The trans mount is probably gone around 120 but engine mounts on the 221 and 212 generation of cars are very robust. Mine was cracked at 120 but I did my engine mounts at 140 and they were both fine! They were a tad shorter but no noise and didn't improve NVH one bit. I have cracks in my flex disc right now at 170 and I can't really feel em. I do the repair all the time so I what fresh ones feel like.
They were not fantastic around the 211/220 era but again those cars were older and parts/service were way cheaper in that time. If you wanna know a fun tidbit about my body of knowledge I was THERE when aircooled 911's were like $10,000 growing helping out at a local shop here. I could tell you how to repair 70's-90's 911's before I ever worked on my own cars. I eventually went on to become an MB SA and I didn't reconnect with the brand til much later due to personal gripes I had. Tells you how much I love MB at the end of the day
I figure the latest ones might go to 150k honestly. The trans mount is weak because its technically suspending the transmission and therefore its mostly hollow space, if it was solid rubber all the way through youd have less comfort so its one of those provisions for driver's comfort. It's a $20 part though.
They were not fantastic around the 211/220 era but again those cars were older and parts/service were way cheaper in that time. If you wanna know a fun tidbit about my body of knowledge I was THERE when aircooled 911's were like $10,000 growing helping out at a local shop here. I could tell you how to repair 70's-90's 911's before I ever worked on my own cars. I eventually went on to become an MB SA and I didn't reconnect with the brand til much later due to personal gripes I had. Tells you how much I love MB at the end of the day
I figure the latest ones might go to 150k honestly. The trans mount is weak because its technically suspending the transmission and therefore its mostly hollow space, if it was solid rubber all the way through youd have less comfort so its one of those provisions for driver's comfort. It's a $20 part though.
MBWorld Fanatic!
Joined: Feb 2012
Posts: 2,611
Likes: 1,209
From: Phoenix
222 S-65
Uh every W212 owner that isn't on MBworld has original engine mounts. The trans mount is probably gone around 120 but engine mounts on the 221 and 212 generation of cars are very robust. Mine was cracked at 120 but I did my engine mounts at 140 and they were both fine! They were a tad shorter but no noise and didn't improve NVH one bit. I have cracks in my flex disc right now at 170 and I can't really feel em. I do the repair all the time so I what fresh ones feel like.
They were not fantastic around the 211/220 era but again those cars were older and parts/service were way cheaper in that time. If you wanna know a fun tidbit about my body of knowledge I was THERE when aircooled 911's were like $10,000 growing helping out at a local shop here. I could tell you how to repair 70's-90's 911's before I ever worked on my own cars. I eventually went on to become an MB SA and I didn't reconnect with the brand til much later due to personal gripes I had. Tells you how much I love MB at the end of the day
I figure the latest ones might go to 150k honestly. The trans mount is weak because its technically suspending the transmission and therefore its mostly hollow space, if it was solid rubber all the way through youd have less comfort so its one of those provisions for driver's comfort. It's a $20 part though.
They were not fantastic around the 211/220 era but again those cars were older and parts/service were way cheaper in that time. If you wanna know a fun tidbit about my body of knowledge I was THERE when aircooled 911's were like $10,000 growing helping out at a local shop here. I could tell you how to repair 70's-90's 911's before I ever worked on my own cars. I eventually went on to become an MB SA and I didn't reconnect with the brand til much later due to personal gripes I had. Tells you how much I love MB at the end of the day
I figure the latest ones might go to 150k honestly. The trans mount is weak because its technically suspending the transmission and therefore its mostly hollow space, if it was solid rubber all the way through youd have less comfort so its one of those provisions for driver's comfort. It's a $20 part though.
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Out Of Control!!
Joined: Apr 2019
Posts: 11,923
Likes: 6,776
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
AGING BEFORE FAILING
Good parts don't just fail, they progressively degrade.
DIY'ers swap their cheap parts early on because they do not pay the premium repair cost.
All 3 mounts sag by carrying engine+tranny weight 24x7 - Then in addition driving torque and heat.
In the end, engine mounts knock on a resting rubber pad, tranny mount is extra loose but capured to stay safe.
Between new and failure the mounts slowly colapse to misalign the drive line components. That's what help bring next stage: driving "vibrations"...
Mounts don't suddenly fail one day, they've been bad for sometime. It's very much like windshield wipers or brake pads that wear out.
How bad is bad enough to replace?
(usage + environment + age + quality) or 10Yrs
Last edited by CaliBenzDriver; Jun 1, 2025 at 03:12 PM.
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Likes: 6,281
We've got to learn how well parts are integrated.
Good parts don't just fail, they progressively degrade.
DIY'ers swap their cheap parts early on because they do not pay the premium repair cost.
All 3 mounts sag by carrying engine+tranny weight 24x7 - Then in addition driving torque and heat.
In the end, engine mounts knock on a resting rubber pad, tranny mount is extra loose but capured to stay safe.
Between new and failure the mounts slowly colapse to misalign the drive line components. That's what help bring next stage: driving "vibrations"...
Mounts don't suddenly fail one day, they've been bad for sometime. It's very much like windshield wipers or brake pads that wear out.
How bad is bad enough to replace?
(usage + environment + age + quality) or 10Yrs
Good parts don't just fail, they progressively degrade.
DIY'ers swap their cheap parts early on because they do not pay the premium repair cost.
All 3 mounts sag by carrying engine+tranny weight 24x7 - Then in addition driving torque and heat.
In the end, engine mounts knock on a resting rubber pad, tranny mount is extra loose but capured to stay safe.
Between new and failure the mounts slowly colapse to misalign the drive line components. That's what help bring next stage: driving "vibrations"...
Mounts don't suddenly fail one day, they've been bad for sometime. It's very much like windshield wipers or brake pads that wear out.
How bad is bad enough to replace?
(usage + environment + age + quality) or 10Yrs
Out Of Control!!
Joined: Apr 2019
Posts: 11,923
Likes: 6,776
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
CHEAP VS. CHEAPEST
They're build to isolate vivrations for sometimes.
A tougher rubber would insulate less... upgrading to harder 3rd party mounts is a personal choice.
Same thing is true with control arm bushings: hard polyurethane parts are available with greater road feedback and shorter lifespan.
The wrong choice is to buy junk parts.
Last edited by CaliBenzDriver; Jun 1, 2025 at 05:04 PM.
MBWorld God!
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Even genuine parts are quite cheap when compared to labor cost!
They're build to isolate vivrations for sometimes.
A tougher rubber would insulate less... upgrading to harder 3rd party mounts is a personal choice.
Same thing is true with control arm bushings: hard polyurethane parts are available with greater road feedback and shorter lifespan.
The wrong choice is to buy junk parts.
They're build to isolate vivrations for sometimes.
A tougher rubber would insulate less... upgrading to harder 3rd party mounts is a personal choice.
Same thing is true with control arm bushings: hard polyurethane parts are available with greater road feedback and shorter lifespan.
The wrong choice is to buy junk parts.
Out Of Control!!
Joined: Apr 2019
Posts: 11,923
Likes: 6,776
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
Genuine parts are usually superior quality and that's not saying great (Valeo radiator, Gates idlers,...)
Some afternarket parts can be upgrades (AKEBONO,...) but most are lower grades, some nearly good (Lemförder, Moog...) some only look-alikes counterfeits. Trusted brands rank best in aftermarket: (NGK, Continental,...) - Dorman real is not trusted as reliables.....
when in doubt for important core parts trust the genuine MB parts are quality controlled. Bosch parts only up to their own standards.
Some afternarket parts can be upgrades (AKEBONO,...) but most are lower grades, some nearly good (Lemförder, Moog...) some only look-alikes counterfeits. Trusted brands rank best in aftermarket: (NGK, Continental,...) - Dorman real is not trusted as reliables.....
when in doubt for important core parts trust the genuine MB parts are quality controlled. Bosch parts only up to their own standards.
Last edited by CaliBenzDriver; Jun 1, 2025 at 09:01 PM.
MBWorld God!
Joined: Dec 2019
Posts: 32,222
Likes: 6,281
Genuine parts are usually superior quality and that's not saying great (Valeo radiator, Gates idlers,...)
Some afternarket parts can be upgrades (AKEBONO,...) but most are lower grades, some nearly good (Lemförder, Moog...) some only look-alikes counterfeits. Trusted brands rank best in aftermarket: (NGK, Continental,...) - Dorman real is not trusted as reliables.....
when in doubt for important core parts trust the genuine MB parts are quality controlled. Bosch parts only up to their own standards.
Some afternarket parts can be upgrades (AKEBONO,...) but most are lower grades, some nearly good (Lemförder, Moog...) some only look-alikes counterfeits. Trusted brands rank best in aftermarket: (NGK, Continental,...) - Dorman real is not trusted as reliables.....
when in doubt for important core parts trust the genuine MB parts are quality controlled. Bosch parts only up to their own standards.
I heard about creative steel, since they are a sponsor here after all.
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Joined: Apr 2021
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From: San Jose, CA
11 E550, 16 AMG GTS, 13 S550
I beg to differ RE: longevity of engine mounts in two models I owned.... 211 E-55. Mounts every 30,000 miles. Not because I enjoyed doing them; they had sagged to where the oil pan was mere millimeters from the sway bar. 221 S-65.... Engine mounts annually. Mounts in the 211 and 221 are similar design with the goo inside to absorb vibrations that failed early and often. Somehow my 2004 E-500 (211 with N/A five liter) never needed mounts in the four years I owned it. Perhaps they fail due to big power? I have never been one to spare the horses.
Did you always live in Phoenix? Do you think its a heat issue?
I'm based in a mediterrean-ish climate here in San Jose so I have the luxury of not seeing the more extreme repair cases. The rubber bellow below the mount is fairly soft and I can see it melting with exposure to heat. It doesn't help that MB underhood temps are what they are either if what I'm thinking is correct, so the S65 chowing down on them routinely is probably par for the course. I don't think parts selection is suspect since I trust Corteco/Lem/MBG to be all worth replacements.
Here's some pictures of some melted rubber engine mounts. The polyurethane stuff has less tolerance for heat. I can't imagine the hydraulic ones love heat either. It gets to 100 for a couple days here a year maybe. The C63's with LTH's will melt them too
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Last edited by ChrisHimself; Jun 3, 2025 at 10:46 PM.
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11 E550, 16 AMG GTS, 13 S550
delete
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Last edited by ChrisHimself; Jun 8, 2025 at 07:35 PM.
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Joined: Feb 2012
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From: Phoenix
222 S-65
The E-55 and 221 S-65 were both in Washington for all of the engine mount replacements. Winter to 10 degrees... summer mostly in 80s.
The 222 S-65 has lived with me here in the valley of the sun. 110 is ambient for 4-6 months of the year. The 222 car has not needed mounts yet; but they are of a different design then were used in previous cars.
I’ve seen many mounts fail as you describe in photos above. I never let them get that bad in my cars.
The 222 S-65 has lived with me here in the valley of the sun. 110 is ambient for 4-6 months of the year. The 222 car has not needed mounts yet; but they are of a different design then were used in previous cars.
I’ve seen many mounts fail as you describe in photos above. I never let them get that bad in my cars.
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I don't disagree with your experience, but I see a LOT of cars, although you've seen a LOT of mounts so we'll meet in the middle.
Did you always live in Phoenix? Do you think its a heat issue?
I'm based in a mediterrean-ish climate here in San Jose so I have the luxury of not seeing the more extreme repair cases. The rubber bellow below the mount is fairly soft and I can see it melting with exposure to heat. It doesn't help that MB underhood temps are what they are either if what I'm thinking is correct, so the S65 chowing down on them routinely is probably par for the course. I don't think parts selection is suspect since I trust Corteco/Lem/MBG to be all worth replacements.
Here's some pictures of some melted rubber engine mounts. The polyurethane stuff has less tolerance for heat. I can't imagine the hydraulic ones love heat either. It gets to 100 for a couple days here a year maybe.
Did you always live in Phoenix? Do you think its a heat issue?
I'm based in a mediterrean-ish climate here in San Jose so I have the luxury of not seeing the more extreme repair cases. The rubber bellow below the mount is fairly soft and I can see it melting with exposure to heat. It doesn't help that MB underhood temps are what they are either if what I'm thinking is correct, so the S65 chowing down on them routinely is probably par for the course. I don't think parts selection is suspect since I trust Corteco/Lem/MBG to be all worth replacements.
Here's some pictures of some melted rubber engine mounts. The polyurethane stuff has less tolerance for heat. I can't imagine the hydraulic ones love heat either. It gets to 100 for a couple days here a year maybe.
The E-55 and 221 S-65 were both in Washington for all of the engine mount replacements. Winter to 10 degrees... summer mostly in 80s.
The 222 S-65 has lived with me here in the valley of the sun. 110 is ambient for 4-6 months of the year. The 222 car has not needed mounts yet; but they are of a different design then were used in previous cars.
I’ve seen many mounts fail as you describe in photos above. I never let them get that bad in my cars.
The 222 S-65 has lived with me here in the valley of the sun. 110 is ambient for 4-6 months of the year. The 222 car has not needed mounts yet; but they are of a different design then were used in previous cars.
I’ve seen many mounts fail as you describe in photos above. I never let them get that bad in my cars.
MBWorld Fanatic!
Joined: Feb 2012
Posts: 2,611
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From: Phoenix
222 S-65
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