Loud Humming Noise
Thread Starter
Junior Member
Joined: Apr 2007
Posts: 57
Likes: 0
From: Oklahoma City
2001 S430
Loud Humming Noise
Hey guys sorry to bother you but I have run into something weird with my car today. When I got home and put the car in park and took the key out I got out of the car and heard a VERY LOUD humming/whinny noise coming from the engine. I opened the hood and nothing was steaming or leaking. I checked under the car for any fluids and nothing. I turned the car back on and nothing was throwing errors. I was not paying attention to the temperature gauge while driving and can not say what the temperature was. I have tried looking on the forums for a similar symptom of what it could be but came up with no answers.
Any help would be great.
Thank you in advanced,
Alex
Any help would be great.
Thank you in advanced,
Alex
Last edited by mushu405; May 12, 2010 at 08:11 PM.
Member
Joined: Feb 2008
Posts: 193
Likes: 4
From: Midwest
2013 CLS550 4Matic; 2014 GL350; 2015 GL63; 2016 GTS; 2021 G63
I had the same thing occur and went straight to the dealer and they pulled the relay. Replaced it, charged me for an hour of labor?, and it was fine....
But wait...I was about to start a new thread about the problem I am having now. Help will be appreciated.
After a cold start (car resting overnight or during the work day), I hear a loud "PFFFT" air release type sound come from the front passenger (where the pump is) several times during the first 10 miles or so. The sound tends to occur when I am "cruising" (i.e., going down a hill or cruising to a stop...no foot on the gas). It is fairly loud...
Any ideas?
Please help! Thanks!
But wait...I was about to start a new thread about the problem I am having now. Help will be appreciated.
After a cold start (car resting overnight or during the work day), I hear a loud "PFFFT" air release type sound come from the front passenger (where the pump is) several times during the first 10 miles or so. The sound tends to occur when I am "cruising" (i.e., going down a hill or cruising to a stop...no foot on the gas). It is fairly loud...
Any ideas?
Please help! Thanks!
Member
Joined: Feb 2008
Posts: 193
Likes: 4
From: Midwest
2013 CLS550 4Matic; 2014 GL350; 2015 GL63; 2016 GTS; 2021 G63
Trending Topics
Senior Member
Joined: Nov 2009
Posts: 310
Likes: 0
From: ON, CA
2003 S430
I had the same thing occur and went straight to the dealer and they pulled the relay. Replaced it, charged me for an hour of labor?, and it was fine....
But wait...I was about to start a new thread about the problem I am having now. Help will be appreciated.
After a cold start (car resting overnight or during the work day), I hear a loud "PFFFT" air release type sound come from the front passenger (where the pump is) several times during the first 10 miles or so. The sound tends to occur when I am "cruising" (i.e., going down a hill or cruising to a stop...no foot on the gas). It is fairly loud...
Any ideas?
Please help! Thanks!
But wait...I was about to start a new thread about the problem I am having now. Help will be appreciated.
After a cold start (car resting overnight or during the work day), I hear a loud "PFFFT" air release type sound come from the front passenger (where the pump is) several times during the first 10 miles or so. The sound tends to occur when I am "cruising" (i.e., going down a hill or cruising to a stop...no foot on the gas). It is fairly loud...
Any ideas?
Please help! Thanks!
i have a similar problem I'm not sure actually if this is what are you talking about but with me ALMOST every time i press the brake no gas pedal going into a parking spot or stopping at a stop sign or traffic light i hear something like the front suspension is releasing air!! ( thats when the window is open ) also it doesn't keep releasing for seconds its like a one second air release thing. and mine doesnt have to stay overnight to happen. i could be driving for hours and when i get to a stop i can still hear it. maybe that would help but i have to fix my upper seal on both sides in the front.
let me know if thats what are you having because this is annoying and i wanna find the solution i went to the dealer and they didnt know !
Last edited by benzat17; May 31, 2010 at 08:26 PM.
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Member
Joined: Feb 2008
Posts: 193
Likes: 4
From: Midwest
2013 CLS550 4Matic; 2014 GL350; 2015 GL63; 2016 GTS; 2021 G63
i have a similar problem I'm not sure actually if this is what are you talking about but with me ALMOST every time i press the brake no gas pedal going into a parking spot or stopping at a stop sign or traffic light i hear something like the front suspension is releasing air!! ( thats when the window is open ) also it doesn't keep releasing for seconds its like a one second air release thing. and mine doesnt have to stay overnight to happen. i could be driving for hours and when i get to a stop i can still hear it. maybe that would help but i have to fix my upper seal on both sides in the front.
let me know if thats what are you having because this is annoying and i wanna find the solution i went to the dealer and they didnt know !
let me know if thats what are you having because this is annoying and i wanna find the solution i went to the dealer and they didnt know !
I wonder if there is a way to "reset" the settings on the airmatic pump. Anyone know about that?
Member
Joined: Feb 2008
Posts: 193
Likes: 4
From: Midwest
2013 CLS550 4Matic; 2014 GL350; 2015 GL63; 2016 GTS; 2021 G63
I need to schedule a time to let my car rest at the dealer so I can take them for a spin in the morning to let them hear the sound. I will post an update once I have them look at it.
