SL55/63/65/R230 AMG: Humming noise at idle, raises with RPM as well..
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Super Member
Joined: Jan 2008
Posts: 691
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From: Southern CA
08 CLS63, Honda Accord, 04 911
Humming noise at idle, raises with RPM as well..
Did a search but nothing solid...I have a humming type noise that is constant while at idle, I just noticed this weekend. NOt very loud but is noticeable and I dont think it was constant before..
Humming gets a bit louder as I raise RPM's, I'm thinking it has something to do with the SC?
Humming gets a bit louder as I raise RPM's, I'm thinking it has something to do with the SC?
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Joined: Jun 2011
Posts: 4
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1980 SL 450< 2003 SL 55
I have a buzzing sound at idle, when I have ran it for about 30 mins....it seems to be a pump or something from the rear of the car....it is usually buzzes on and off at idle and a bit more when I start to move, then it seems to dissapear until I get back to idle at a stop sign.....is this the same as you are experiencing?
Cheers
Paul
Cheers
Paul
Senior Member
Joined: Feb 2009
Posts: 280
Likes: 8
From: Sarasota FL
2020 E450 Wagon
Did a search but nothing solid...I have a humming type noise that is constant while at idle, I just noticed this weekend. NOt very loud but is noticeable and I dont think it was constant before..
Humming gets a bit louder as I raise RPM's, I'm thinking it has something to do with the SC?
Humming gets a bit louder as I raise RPM's, I'm thinking it has something to do with the SC?
Mercedes has issued a TSB with a description a a humming or vibration that reaches it's peak at about 1400 RPM. They recommend replacement of a damper in the ABC hydraulic system. On at least the early versions of R230's it is mounted on a valve block just behind the left front wheel behind the inner fender. You can confirm this with your local tech. The part isn't huge money but then there is labor......it would be a good idea to flush the system and change the filter to the latest version at the same time.
If you are convinced it is coming from the supercharger just take the belt off and see if it goes away.
Last edited by GermanCars; Nov 5, 2012 at 05:32 PM. Reason: Said SBC, meant ABC
