Parts Catalog Accessories Catalog Tech Info Tech Forums
  Search our site:    
 Cart  | Project List | Order Status | Help    

Go Back   PeachParts Mercedes ShopForum > Technical Information and Support > Tech Help

LinkBack Thread Tools Display Modes
Old 06-07-2001, 10:32 PM
Registered User
Join Date: Sep 2000
Posts: 42
Hi all,

My car has a bit of vibrating on idle and I took it to the dealer and they said the engine mount is on the way out. It probably can still last for a year.

The vibration only happen in forward gear and idle but not reserve.

The dealer think it will take 4 hours to do and cost quite a bit of money.

What are engine mount and why are they so expensive. I thought they are just some rubber to support the engine!

Michael Tse
Reply With Quote
Old 06-07-2001, 10:43 PM
Registered User
Join Date: Jan 2000
Location: New Bedford, MA USA
Posts: 1,583
What car, what engine, what year? what mileage????
Jeff Lawrence
1989 300e
2000 Dodge Grand Caravan SE
No matter what you fix, there will always be something else to fix..
"Warranty" is just another way of postponing the inevitable.
Reply With Quote
Old 06-07-2001, 10:50 PM
Registered User
Join Date: Sep 2000
Posts: 42
It is a W140 1993 S500.
Reply With Quote
Old 06-08-2001, 10:06 AM
G-Benz's Avatar
Razorback Soccer Dad
Join Date: Apr 2001
Location: Dallas/Fort-Worth
Posts: 5,711
Without being too technical, the engine mounts are the four points of the engine that are connected to the chassis of the car.

If they were mounted solidly (as in race cars, which have solid metal mounts) all of the engine's rotational vibrations would be transferred to the body, resulting in a very uncomfortable ride.

The engine mounts for passenger vehicles are made of a compliant rubber compound (such as urethane, I'm being generic here), and act like shock absorbers to dampen the vibrations.

When they get old and brittle, they either stiffen up, or break. As they stiffen, the dampening properties are lost, resulting on more vibrations transferred to the vehicle. If one or more of them break, then the engine is free to move about the broken points, resulting in "clunky" sounds when changing gears, or tromping on the accelerator.

I don't know how they are mounted on your particular model, but the process usually involves loosening the motor mounts and raising the engine via a lift, allowing access to the motor mounts for replacement. For what it takes, it's best to have them all replaced, like you would with shocks brakes and tires.

It's not a job for the timid, and you run the risk of having an engine fall on top of you if it's not supported properly.

I've only replaced the mounts on my VW engine, but it was out of the car at the time anyway, so I am not sure of the absolute procedure for MBs.

Perhaps the more experienced mechanics on this forum can give you more insight as to whether the cost and expense you were quoted is valid...Good Luck!
2009 ML350 (84K) - Family vehicle
2001 CLK430 Cabriolet (71K) - Wife's car
2005 BMW 645CI (124K) - My daily driver
2012 Mustang V6 (60K) - Daughter's car
Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Oil Additives Bill Wood Performance Paddock 6 08-24-2011 10:53 AM
300D engine mount blues acy76 Diesel Discussion 31 11-08-2010 05:39 PM
'94 C280 - Intermittent No-Start & Uncommanded Engine Shutdown jgl1 Tech Help 21 05-18-2009 01:01 PM
What a Difference - New Engine Mount! franklyspeaking Diesel Discussion 1 11-03-2004 06:26 PM
running a cold engine frosty Tech Help 3 10-25-2002 03:03 AM

All times are GMT -4. The time now is 10:29 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page