S-Class (W140) 1991-1999: 300 SD, S 350TD, 300 SE 2.8, S280, 300 SE 3.2, 300 SEL 3.2, S320, S320L, 400 SE, S420, 400 SEL, S420L, 500 SE, S500, 500 SEL, S500L, 600 SE, S600, 600 SEL, S600L, 500 SEC, 600 SEC

1998 S500

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Old May 27, 2008 | 09:42 PM
  #1  
OdinsThrone's Avatar
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1998 S500
1998 S500

Car starts shaking when accelerating just past 30 mph. Does it while olny pushing down on the gas. I asked a mechanic what is causing this , and he told me it is the flex disc? Anyone agree? Thanks... Car has 8 new coils and new plugs.
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Old Jun 3, 2008 | 09:22 PM
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Glide Ride's Avatar
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95 S320 & 99 E320 4Matic
It's easy enough to check. I just changed my front flex disc this past weekend. Just get under the car (ramps are easy) and look at the drive shaft where it connects to the transmission. The flex disc should not have any signs of cracked rubber or pieces missing (like mine was).

The job took me about an hour, but I take my time. The part cost me around $65.

Good luck
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Old Jun 4, 2008 | 09:46 AM
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Rod Spohn's Avatar
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From: Mesa, AZ
2011 E350 Bluetec, 1996 S320 & 2006 E320 CDI Sold to my son & 2017 GMC 2500 Diesel Pick up
Originally Posted by Glide Ride
It's easy enough to check. I just changed my front flex disc this past weekend. Just get under the car (ramps are easy) and look at the drive shaft where it connects to the transmission. The flex disc should not have any signs of cracked rubber or pieces missing (like mine was).

The job took me about an hour, but I take my time. The part cost me around $65.

Good luck
I agree with it very probably being the Flex disc. As said above its an fast & easy fix. I was amazed at how bad mine was and that it only made the car shake a little.
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Old Jun 5, 2008 | 09:32 PM
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1998 S500
Thanks a lot. Appreciate the feedback.
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Old Jun 12, 2008 | 01:56 AM
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1998 S500
Smile

Turned out to be a broken bolt through the rear flex plate! No more shaking =]
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