R-Class (W251) Produced 2006-2013: R320CDI, R350, R420CDI, R500

Steering moan

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Old 09-25-2011, 11:41 AM
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2006 Mercedes R500
Steering moan

I have a 2006 R500 that recently started two, seemingly related symptoms. When turning left, you can hear a "moaning" or non-metallic grinding sound, and when turning hard left, you can also "feel" slight twisting sensation. I imagine this is problem with the power steering. At this point, it is only mildly annoying.

I had something like this is in the past. The problem was more significant and there was a loud grinding sound when turning. We cured this by changing the power steering reservoir and replacing the o-rings.

Any thoughts would be appreciated.
Old 09-26-2011, 06:24 PM
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2007 R500
Originally Posted by thomgonzales
I have a 2006 R500 that recently started two, seemingly related symptoms. When turning left, you can hear a "moaning" or non-metallic grinding sound, and when turning hard left, you can also "feel" slight twisting sensation. I imagine this is problem with the power steering. At this point, it is only mildly annoying.

I had something like this is in the past. The problem was more significant and there was a loud grinding sound when turning. We cured this by changing the power steering reservoir and replacing the o-rings.

Any thoughts would be appreciated.
Thom,

I had a similar problem with my 2007 R500. I had the power steering pump replaced under the extended warranty. It was leaking fluid and losing pressure.

JR

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