Slightly louder PS pump on E420 W210 than I'd like

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Slightly louder PS pump on E420 W210 than I'd like

03-07-2011, 11:38 AM

apb

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Join Date: Mar 2001

Location: Houston, Texas

Posts: 450

Slightly louder PS pump on E420 W210 than I'd like

I do not have a leak and the fluid is topped off. Any suggestion on what to do? Do I need a new power steering pump or should I use another fluid such as Pentosin CHF 11S? What would cause an older PS unit to get noisy?

Thanks!

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2008 S550
2010 GLK350
1997 E420 (retired)
2005 CLK500 (retired)

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