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GL Class (X164) 2007-2012: GL320CDI, GL420CDI, GL450, GL550

whinning noise when slowing down and when turning steering wheel

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Old 03-22-2013, 12:06 PM
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whinning noise when slowing down and when turning steering wheel
Recently I've notice a whinning noise shortly after crank-up when I slow down and when I turn the steering wheel. It seems to stop once it vehicle warms-up. Sometimes it's louder than others. Thoughts?
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Old 03-22-2013, 07:37 PM
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2008 GL 320 CDI, 2004 VW V10 Touareg TDI
Power steering issue? have you checked the PS fluid level? Has anyone ever changed (flushed) the ps fluid). You drive a 450 but you don't say which year.
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Old 03-23-2013, 06:44 AM
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2002 C32 AMG
Add some power steering fluid, must be leaking somewhere.
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Old 03-23-2013, 07:07 AM
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2002 C32 AMG
Add some power steering fluid, must be leaking somewhere.
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Old 03-25-2013, 08:50 AM
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My GL450 is a 2008 model.I'll try some PS fluid.
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Old 03-25-2013, 06:43 PM
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You may not need to add fluid. Check level first.
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Old 04-02-2013, 11:04 AM
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2007 GL450, 2006 Porsche 911, 2004 VROD
it is power steering issue. i had the same issue couple of weeks back and the faulty PS fluid reservoir is replaced.
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