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W166, W251 Moderator
1987 560SL - Signal Red, 2014 ML350 - Diamond White, 2019 Ford Explorer - Magnetic (company car)
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1,251 Posts
Discussion Starter #1 (Edited)
Our 320cdi had started to shake/vibrate a lot; it looked like our exhaust was not installed correct.
(We just had the fuel pumps replaced, long story)

So I called the dealer and they where very friendly, like normal, just bring it in it’s a 5-10 min adjustment as the SA was also convinced that it was just an adjustment.

After 15 minutes he came back, and told that I would get a loaner, the tech was sure it was the motor mounts??? after only 34K the motor mounts are shot.

I decided to ask a little into it and it turn out that the motor mounts contains oil, they are actually oil dampers not rubber dampers, he also mentioned that if 1 goes bad the engine will start to vibrate and then it will take out the next one etc.

I'll get my car back on Wednesday as they did not have spare, so now we enjoy the C300, not as comfortable as the R, but more fun to drive :D

So now the question;

Have any of you with diesels had issues with the motor mounts? If so around what millage?
 

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557 Posts
It is a common problem with many MB vehicles...
 

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Outstanding Contributor - Always Remembered, RIP
Zotye Auto 1.5T T600 2016
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52,804 Posts
^Correct and a pain in the neck to keep changing em.
 

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06 R360, 06 F350 6.0, 04 CayenneS, 96 911TT 500HP, 86 928S, 74 911S, 73 914-4, 70 914-6, 02 Durrango
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301 Posts
Will this happen in my R350?
 

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W166, W251 Moderator
1987 560SL - Signal Red, 2014 ML350 - Diamond White, 2019 Ford Explorer - Magnetic (company car)
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1,251 Posts
Discussion Starter #5
By reading replies I sound like they need to be replaced every 35K miles, sonnds liek a bad design...

I hope that this is the last time I have to bring it in to MB for repairs, not maintenance but repairs...
 

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06 R360, 06 F350 6.0, 04 CayenneS, 96 911TT 500HP, 86 928S, 74 911S, 73 914-4, 70 914-6, 02 Durrango
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301 Posts
Do you guys have a link to MB for this info?
 

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W166, W251 Moderator
1987 560SL - Signal Red, 2014 ML350 - Diamond White, 2019 Ford Explorer - Magnetic (company car)
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1,251 Posts
Discussion Starter #7
Nope sorry I do not have a link to info, ask Eric he might be able to get some insider info.

Jus for info, I will have my paticle filter replaced, it got damaged when the motor mounts was damaged, the heavy vibration caused the ceramic filter inside to crack and now it is loose and ratles.
 

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06 R360, 06 F350 6.0, 04 CayenneS, 96 911TT 500HP, 86 928S, 74 911S, 73 914-4, 70 914-6, 02 Durrango
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301 Posts
Are you talking about the catalytic converter?
 

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W166, W251 Moderator
1987 560SL - Signal Red, 2014 ML350 - Diamond White, 2019 Ford Explorer - Magnetic (company car)
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1,251 Posts
Discussion Starter #9
Are you talking about the catalytic converter?
The diesel does not carry a catalytic converter but a particle filter, it does a similar job to cleaning the diesel exhaust as the catalytic converter does on a gasoline engine.
 

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2006 Alpine Rain R500
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203 Posts
Motor mounts do go out, but normally not until around 70k and up. The vibration will be very noticeable when sitting at idle, on more extreme cases you can feel the engine tilt if the mount is already broken.
 

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W166, W251 Moderator
1987 560SL - Signal Red, 2014 ML350 - Diamond White, 2019 Ford Explorer - Magnetic (company car)
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1,251 Posts
Discussion Starter #11
The diesel does not carry a catalytic converter but a particle filter, it does a similar job to cleaning the diesel exhaust as the catalytic converter does on a gasoline engine.
Sorry All

Was a little to fast on the text and forgot some info;

The particle filter in a diesel is a passive filter e.g. the filter acts a a normal filter trapping the sod particles in the filter. It is cleaned by heating the filter enough to have the sod burn away.

The catalytic converter is an active filter where the gasses are cleaned via a chemical reaction between the exhaust gas and the "metals" in the converter.

Also the diesel has a catalytic converter, my mistake above to smokersteve
 

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06 R360, 06 F350 6.0, 04 CayenneS, 96 911TT 500HP, 86 928S, 74 911S, 73 914-4, 70 914-6, 02 Durrango
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no worries :)
 

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Yes, and if you track mileage you can certainly see when it is working as consumption goes up...
 
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