Whirring noise from under floor

xpack

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Mar 5, 2018
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Your Mercedes
ML350 W164 2010 V6 diesel
Past few weeks a dry whirring noise has developed from under the floor. It starts as soon as the wheels are in motion. Whether under load or off load the noise does not get louder or quieter. It's not a drone or rumble as I would have thought would come from a wheel bearing. Could it be the propshaft bearing???Is this a common thing.
It's a 2005 ML270
 

daibevan

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Alltwen, Pontardawe
Your Mercedes
W203 C200 Kompressor Elegance SE 2006 Tanzanite Blue with cream interior
Parking brake cable come loose and rubbing on prop shaft ?
 

alexanderfoti

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Tonbridge
Your Mercedes
W221 S65 AMG - W204 C63 AMG + Various other MB's
Propshaft bearings normally change their noise with load.

Have you had a look under the car to see if there is anything obviously amiss?
 

penton

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Aug 30, 2011
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Location
Harefield Middlesex
Your Mercedes
W163 ML 2002 320 R170 slk 230 komp.
I had to replace the propshaft centre bearing on my ML at 130 thousand miles. Symptoms exactly as you have described. When the bearing came off it was dry so changed before it could break up. Mine is a W163 ML, propshaft is 2 piece so make sure everything is marked before removal to keep everything balanced for re-assembly.

Robin
 

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