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Old 06-25-2000, 09:32 AM
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My 380SE runs fine under 60MPH. Once I pass 60, the car starts shaking violently and the steering wheel vibrates. This is worsened when braking, but happens either way. What could be the cause and how could it be fixed?
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Old 06-25-2000, 10:40 AM
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
Vibrations always start with the rotating member; tires wheels etc. These vibrations get out of hand with excessive play in the steering components; tierods, idler arm, and center link. The steering shock usually is weak.

On many models and especially the 126 and 140 models longitudinal softness or play is a recognised deficiency. When this occurs the wheel can move forward and backward in the wheel well. The device used to control this activity is a ball joint/mount in the 126 body and a hydraulic control arm bushing in 140 chassis. Both chassis have characteristic resonant vibrations that occur above and around 60mph due to this softness. Modified improved parts are now sold for both models. These actually were put into production early in both chassis runs. Even the newer parts fail to control this quite early in life. Except for the loss of fluid in the 140 hydraulic bushing and the cracked boots on the 126 ball joint these control pieces are very hard to prove defficient as their original design was marginal (proven by the subsequent improved designs).

Steve Brotherton
Owner 24 bay BSC
Bosch Master, ASE master L1
26 years MB technician
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Old 06-25-2000, 08:49 PM
Posts: n/a
I don't have any experience with cars in this area. Could you please simplify (or expand) your response, so that I know what needs to be done to fix the problem? The car is an '85, by the way...I realized I forgot to include that.


[This message has been edited by SoundAdvice (edited 06-25-2000).]
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