Strange noise when car is idle with Start/Stop
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Newbie
Joined: Feb 2015
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S550
Strange noise when car is idle with Start/Stop
Experienced a strange noise when the car (2014 S550) is idle and the engine is shut off by the Start/Stop system, video link below. I brought the car to MB of Tampa on Saturday and they still don't know what it is. They determined it's not the engine and are still looking for the cause of the noise. Anyone experience anything similar? 
Member
Joined: Dec 2010
Posts: 96
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From: NYC
'01 S500 AMG Sport, ABC,Distronic,Rear Side Shades // '10 E350 P2, Pano, BLK/ALM,4MATIC Sport
Is that from the engine bay? If so it might be the low pressure coolant circulation pump for the inter cooler/turbo system... The radiator is located at the lower right front...
Super Member
Joined: Dec 2005
Posts: 806
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From: Rochester, NY
2009 S550 AMG sport pckg. 2014 Ford F-150 Lariat Supercrewcab
Check the fuse/relay for the airmatic pump. Sounds like its running. Any warning lights?
Last edited by Nickthegreek; Feb 28, 2015 at 11:14 AM.
