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  #1  
Old 11-01-2007, 10:37 PM
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Join Date: Nov 2007
Posts: 3
Low Rumble at Speed

Hello,
I recently bought my first ever 500sl (1992). Unfortunately, there is a noticeable rumble between 110 and 130 km/h. It is a very low frequency (~50hz) and I can feel it on the floor, in my seat, etc., but I can't tell where it is coming from. It isn't there above 130 or below 110. Any thoughts?

Thanks,
Han
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  #2  
Old 11-01-2007, 10:44 PM
88Black560SL
 
Join Date: Oct 2004
Location: NC
Posts: 2,988
Quote:
Originally Posted by Han Dagith View Post
Hello,
I recently bought my first ever 500sl (1992). Unfortunately, there is a noticeable rumble between 110 and 130 km/h. It is a very low frequency (~50hz) and I can feel it on the floor, in my seat, etc., but I can't tell where it is coming from. It isn't there above 130 or below 110. Any thoughts?

Thanks,
Han
It does sound right arround a typical tire speed. Maybe you can just have them balanced. But where you describe it sounds like drive shaft balance or center bearing.

John Roncallo
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  #3  
Old 11-02-2007, 12:15 AM
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Join Date: Mar 2003
Location: Milwaukee Wisconsin
Posts: 1,150
Also consider posssible drive shaft support bearing and the drive shaft flex disc couplers. Both went bad on my vehicle at about 98K miles. Vibration was more noticeable while accelerating than at sustained cruise speed.
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  #4  
Old 11-04-2007, 11:22 PM
aam aam is offline
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Join Date: Sep 2006
Location: California
Posts: 115
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Originally Posted by tecqboy View Post
Also consider posssible drive shaft support bearing and the drive shaft flex disc couplers. Both went bad on my vehicle at about 98K miles. Vibration was more noticeable while accelerating than at sustained cruise speed.
I second that, more on the flex discs couplers.
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