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Old 04-10-2005, 06:02 PM
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Join Date: Feb 2002
Location: Seattle
Posts: 596
W124 300TE Upper Strut Mounts

Hello please see my pictures I am aware that I need to replace these mounts soon. Question is, how bad are they? Wife wants to take a ~500 mile trip this week should driving the car be avoided at all costs or is it probably OK until after the trip when I can replace at my convenience?


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W124 300TE Upper Strut Mounts-pass-side-mount.jpg   W124 300TE Upper Strut Mounts-driver-side-mount.jpg  
1986 300E Anthracite + ECodes + MB Mileage Award
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Old 04-10-2005, 06:17 PM
Rahulio1989300E's Avatar
V10s & V8s FTW!
Join Date: Jan 2005
Posts: 1,147
Well, lots of highway miles kinda means that there will be less up and down movement.... so I THINK it will be okay... lets see what others have to say...

If you are very concerned, get a rental car!!!
2006 BMW M5 "Heidi" @ 109,000 miles
2005 MBZ C55 AMG "Lorelai" @ 165,000 miles
1991 MBZ 300E "Benzachino II" @ 165,000 miles
1990 MBZ 500SL "Shoshanna" @ 118,000 miles

(On the hunt for a good used M103 engine as of 6/10/23, PM me if you have one to sell!)
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Old 04-10-2005, 06:22 PM
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Join Date: Feb 2002
Location: Seattle
Posts: 596
She can always take the 300E -- but no A/C at this time.

Is mount failure catastrophic -- will it fail and go up through the hood or will it get worse and worse and rattle for awhile before it
1986 300E Anthracite + ECodes + MB Mileage Award

Last edited by d2bernhard; 04-10-2005 at 11:37 PM.
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Old 04-10-2005, 07:38 PM
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Join Date: May 1999
Location: Sacramento, CA
Posts: 1,565
I've read posts here that said that if the mount lets go, the strut rod could go through the hood. But there's a limit stop built into the design, which should prevent the strut rod from rising too far, and could theoretically let the car limp home (?).

What's the condition of the bottom of the mount? That could give you an indicator about how extensive the cracking is.

For what it's worth, my mounts looked like that for quite some time (and many thousands of miles) before I had them replaced with the front struts at around 270,000 miles.
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Old 04-11-2005, 09:57 AM
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Join Date: Apr 1999
Posts: 2,638
Can you inspect the mount from underneath to see if the cracks run all they way through ?

FWIW, you can replace these with a floorjack and handtools (no need to remove strut), IF you disconnect the front swaybar.

:-) neil
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Old 04-11-2005, 04:32 PM
Robert Ryan
Join Date: Mar 2005
Location: Bay Area, CA
Posts: 222
Failure of the top strut mount would drastically alter the camber and caster, and dramatically change the toe-in/out condition of the alignment. The wheel would unlikely fall off. The spring keeps the control arm from going up. The only thing that would be pressing up on the hood would be the gas charge in the strut (unless you hit a very large bump). Pure speculation but I think a failure would go something like the car massively swerving to one side of the road.

check out the DIY WIKI for close up photos: 124 Ball joints.

89 300te 222,222
92 300e 190,000
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