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Old 01-06-2002, 10:13 PM
jsmith's Avatar
Join Date: Aug 2001
Location: At Sea
Posts: 1,729
isolating road vibration sources

after finally eliminating wheel balance as a factor (had a dynamic load balance performed), i now see that there were other components to the vibration i was experiencing at 75 - 80. certain types of road seem to induce it while on smooth blacktop, the vibration is non-existent. it is a very slight vibration you can feel through the body and somewhat on the steering wheel. is this indicative of front-end component wear? what would be a likely culprit? i thought about the flex disk, tranny mount and engine mounts, are those possible sources too? at one point i thought that it happened when under load such as on an upgrade but my observations were not conclusive.

any ideas on where to start?
1993 300e-2.8
- gone now <sigh>
"Do not adjust your mind, it's reality that's malfunctioning"
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Old 01-07-2002, 01:56 AM
Registered User
Join Date: May 2001
Posts: 356
I had a similar problem that was eliminated by replacing worn out lower front balljoints.- Did the Idler Arm bushing kit at the same time to finally free the world of annoying grinding steering wheel noise (when turning wheel to right).
hope this helps.
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Old 01-07-2002, 06:20 AM
ymsin's Avatar
Driver, Mercedes-Benz
Join Date: Feb 2001
Location: Malaysia
Posts: 1,645
My 126 runs well on smooth surfaces but vibrates when on rough. It vibrates more than usual but real smooth if the road's good. I changed all the front bushings and had the wheels balanced. I thought it could have been the drive shaft but am now thinking that its just normal.

One way to find out if your engine mountings need replacing is to step on the brake with the engine on, and engage into D or R and feel the vibes. If it vibrates badly, then perhaps the mounts have to go.
... Kerry

126 tailed by a 203, 129 leading the pack.
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