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Any one else have a whine in ML350 4MATIC

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Old Sep 6, 2013 | 02:57 PM
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2011 Mercedes-Benz ML350
Any one else have a whine in ML350 4MATIC
Here is the you tube video of me driving it. You can hear it plainly. I have been told by MBUSA and my dealer that it is operating as designed.

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Old Sep 8, 2013 | 11:06 PM
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ML350
Exclamation Noisy!
Mine sounds smooth. Yours sounds like maybe a belt is bad, or a bearing on one of the pulleys the belt pushes. It ain't right!
Suggest you find an independent MB mechanic in your area (an easy online search, and look for good reviews). Have them give it a listen.

Ps. You live in a nice neighborhood!
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Old Sep 13, 2013 | 03:44 PM
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2011 Mercedes-Benz ML350
***Update***
Took it to MB of Tampa(a different dealer), and they fixed it quickly.

Thanks PNTbenz!!
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Old Sep 13, 2013 | 09:55 PM
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Noisy no more
What was the problem? What did they do and what did it cost?

'Curious minds want to know...'
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Old Sep 13, 2013 | 10:05 PM
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2011 Mercedes-Benz ML350
Tensioner pulley. $0 cost. It's under warranty.
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Old Sep 13, 2013 | 11:05 PM
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Talking Pulley video diagnosis
Sweeeet!

I'm going to have to apply for a MB video diagnosis mechanic specialty position!
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Old Nov 4, 2013 | 08:56 PM
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2011 E350 Luxury
I wonder if this noise was present when the climate control was engaged as well as when it was completely off. I'm trying to pinpoint a noise my ML350 is making as well; the noise I'm dealing with is signifcantly muted after turning the climate control off.

Could the tensioner pulley and the climate control/AC have any connection whatsoever?

Thanks for the assistance!
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Old Nov 5, 2013 | 07:13 AM
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I hope you go back to original dealer and show the advisor. Thats unacceptable that a technician couldnt find the origination of that noise.
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Old Nov 6, 2013 | 06:04 PM
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Originally Posted by khelms_98
Could the tensioner pulley and the climate control/AC have any connection whatsoever?
The A/C is driven by the serpentine belt that runs on the tensioner pulley. So yes - the A/C load would affect the pulley load, hence noise.
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Old Nov 6, 2013 | 08:33 PM
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From: Georgia
2011 E350 Luxury
Originally Posted by iankayem
The A/C is driven by the serpentine belt that runs on the tensioner pulley. So yes - the A/C load would affect the pulley load, hence noise.
Thanks! I'm hoping my issue has more to do with the tensioner or idler pulley and less to do with the A/C compressor itself. I'll get it checked as soon as I can.

The noise is very aggravating and is very audible at idle and low RPMs. It seems to be worse in damp/humid conditions, ie. leaving the house very early in the morning....not necessarily extraordinarily hot conditions as one would expect given that it's climate control related.

Thanks again!
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