E220 CDI Engine Mounts

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Notamech

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62
Location
London
Car
E220 CDI
I was wondering how much vibration is normal before we can presume that motor mounts need replacing?

My car clearly has vibrations that can be felt in the steering, pedals and seat when at idle, for example when stopped at a red light. They're not very harsh yet but they're there and they go away when the car is moving. Its been a while since I've owned a diesel car and i can't remember whether my previous diesel car did this.

Was wondering if everyone experinces some amount of vibration in the cabin with these OM651 units when the engine is running but the car is stationery? or should you not experience any vibration at all?

A merc specialist indie quoted £600 including parts and labour to replace the 2 engine and 1 gear mount + vat on top. Given its a pricy job wanted to understand what people's experiences have beeen with this.
 
That seems rather expensive.

I had all 3 mounts changed on my E320 CDi (all MB parts) for circa £430 including labour and VAT
 
That seems rather expensive.

I had all 3 mounts changed on my E320 CDi (all MB parts) for circa £430 including labour and VAT
Just curious, how long back was this? Also what symptoms did you experience that prompted you to change the mounts? £430 does sound reasonable. Maybe I'll buy the mounts myself online and check with a non merc specialist as it sounds like quite a straightforward job.
 
Check on Youtube for a 'how to' video. I bet there are some.
 
Just curious, how long back was this? Also what symptoms did you experience that prompted you to change the mounts? £430 does sound reasonable. Maybe I'll buy the mounts myself online and check with a non merc specialist as it sounds like quite a straightforward job.
This was just over 12 months ago that I had then changed. It transformed the car in terms of smoothness.

The first symptom was vibration in reverse when the engine was cold. It then became more noticeable at idle when at operating temperature.

There was also a very noticeable shudder when turning the engine off.

What mileage has your car covered?

The parts were £98, for each engine mount and £38 for the transmission mount from MB
 
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This was just over 12 months ago that I had then changed. It transformed the car in terms of smoothness.

The first symptom was vibration in reverse when the engine was cold. It then became more noticeable at idle when at operating temperature.

There was also a very noticeable shudder when turning the engine off.

What mileage has your car covered?

The parts were £98, for each engine mount and £38 for the transmission mount from MB
Mine has done ~68k miles but is nearly 10 years old. Researching online it seems like they fail at around this mileage / age. And as explained i do feel vibration in the steering wheel, pedal and seat but only when stationary or when the engine is making an effort to pick up speed. Most of the time i dont feel anything when driving normally. And the vibrations arent unbearable but can definitely be felt

Also i do experience a shudder where its almost like the whole car shakes when i switch the engine off but was lead to believe that this is normal for diesel cars and is a sign of a healthy engine.

The quote you posted above is nearly exact what was quoted to me for parts ~240 in parts and the rest was labour is what they said. Not sure if its more complex on my car due to them having to move some components out of the way? Couldn't find any videos for the facelift w212 and the om651 engine. I think these engines come with a plastic sump making it harder to jack up the engine to remove the mounts perhaps.

When researching online i do see cases that are really bad i.e it seems like the mounts have failed completely and the car shudders etc. most of the time. Mine isnt nearly as bad so am wondering if mine has not yet sunk fully but is not as efficient as when they were new or maybe what im experiencing is normal for the OM651 engines. Problem is I have no baseline to compare.
 
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Definitely too much vibration as these engines have twin Lanchester balancer shafts.
Just to clarify are you saying experiencing some vibration in the cabin when stationary is normal for this engine?
 
I was wondering how much vibration is normal before we can presume that motor mounts need replacing?

My car clearly has vibrations that can be felt in the steering, pedals and seat when at idle, for example when stopped at a red light. They're not very harsh yet but they're there and they go away when the car is moving. Its been a while since I've owned a diesel car and i can't remember whether my previous diesel car did this.

Was wondering if everyone experinces some amount of vibration in the cabin with these OM651 units when the engine is running but the car is stationery? or should you not experience any vibration at all?

A merc specialist indie quoted £600 including parts and labour to replace the 2 engine and 1 gear mount + vat on top. Given its a pricy job wanted to understand what people's experiences have beeen with this.
Sounds like a rip off, price up the parts from link below and if you are local to Welling kent pm me i know a mechanic who will save you plenty of £

Mercedes-Benz of Edinburgh | eBay Stores
 
Sounds like a rip off, price up the parts from link below and if you are local to Welling kent pm me i know a mechanic who will save you plenty of £

Mercedes-Benz of Edinburgh | eBay Stores
Thanks will message them to get cost of parts. They don't seem to be listed but frankly the cost of parts quoted to me didn't seem outrageous. The labour did.
 
Also i do experience a shudder where its almost like the whole car shakes when i switch the engine off but was lead to believe that this is normal for diesel cars and is a sign of a healthy engine.
Whoever told you that a diesel engine that shakes the car when it is switched off is the sign of a healthy engine is someone to ignore 🙄
 
Whoever told you that a diesel engine that shakes the car when it is switched off is the sign of a healthy engine is someone to ignore 🙄
Both these threads have a discussion on the same and seem to suggest its normal with some technical justification. But you are probably right the previous diesel i owned from what i vaguely remember besides the noise from the engine was no different in feel to any petrol car ive owned.


 
I own a petrol 204 and a friend a diesel 204 the difference is huge, the diesel is horrid in comparison!
 
Plenty of content on youtube. Open the bonnet and rev the nuts off it to see how much the engine likes to dance. Bit Like this.

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Plenty of content on youtube. Open the bonnet and rev the nuts off it to see how much the engine likes to dance. Bit Like this.

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For more detailed information, see our cookies page.
Thanks for sharing. Seen these already. Mine isnt as bad so clearly my mounts haven't completely failed yet. But I feel like they've partially failed if that makes sense. Maybe they've sunk half way or it could just be the gearbox mount as i also feel the shift from 1st - 2nd and 2nd - 3rd but not the shifts from there on. Also had the transmission serviced recently so hoping its not a problem with the transmission itself but possibly partially worn mounts
 
£220 ish (parts and Labour) a couple of years ago for my E320cdi engine mounts and transmission mount to be replaced .
Parts were Lemforder (had MB part numbers on them )in a sale on Autodoc . Indy fitted them (I lost my bottle to do them )
 
Both these threads have a discussion on the same and seem to suggest its normal with some technical justification. But you are probably right the previous diesel i owned from what i vaguely remember besides the noise from the engine was no different in feel to any petrol car ive owned.


Those threads both explain why diesel engines are prone to a shudder on shutdown but neither claim or show evidence that the characteristic is a sign of a healthy engine.


Since the engine mounts were changed on my car there is no perceptible shudder when switching off.
 
Those threads both explain why diesel engines are prone to a shudder on shutdown but neither claim or show evidence that the characteristic is a sign of a healthy engine.


Since the engine mounts were changed on my car there is no perceptible shudder when switching off.
Makes sense. Its very likely that my mounts are partially worn if thats possible. Might source some lemforder ones online and find an indy that is willing to do it at a good price.
 
Makes sense. Its very likely that my mounts are partially worn if thats possible. Might source some lemforder ones online and find an indy that is willing to do it at a good price.
Who quoted £600 +vat?
 

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