cooling fan noise??
Thread Starter
Junior Member
Joined: Jun 2007
Posts: 26
Likes: 1
cooling fan noise??
My wife's 2010 e350 w212 cooling fan seems to make a lot of noise --when running it sounds like a jet engine. Inside the car she can't hear it but once you exit the car you can hear the fan running on high.
The car runs fine with no overheating issues at about 87 degrees. I have an older 1997 e320 w210 that is much quieter.
Are the w212's just noisy or do I have a sensor issue?
The car runs fine with no overheating issues at about 87 degrees. I have an older 1997 e320 w210 that is much quieter.
Are the w212's just noisy or do I have a sensor issue?
Senior Member
Joined: Dec 2018
Posts: 284
Likes: 60
From: New York
2010 E350 4Matic sedan
My wife's 2010 e350 w212 cooling fan seems to make a lot of noise --when running it sounds like a jet engine. Inside the car she can't hear it but once you exit the car you can hear the fan running on high.
The car runs fine with no overheating issues at about 87 degrees. I have an older 1997 e320 w210 that is much quieter.
Are the w212's just noisy or do I have a sensor issue?
The car runs fine with no overheating issues at about 87 degrees. I have an older 1997 e320 w210 that is much quieter.
Are the w212's just noisy or do I have a sensor issue?
Senior Member
Joined: Dec 2018
Posts: 284
Likes: 60
From: New York
2010 E350 4Matic sedan
MBWorld Fanatic!
Joined: Jan 2009
Posts: 9,224
Likes: 1,798
From: V E G A S
1922 Ford Model T / no OBD
1997 E320 has 2 fans, where mechanical fan turns with the engine, meaning not much noise at idle.
Single electric fan will run at full speed with AC on and it will sound like jet engine. No way around other than keep AC to minimum.
Single electric fan will run at full speed with AC on and it will sound like jet engine. No way around other than keep AC to minimum.
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Junior Member
Joined: Jul 2008
Posts: 56
Likes: 1
From: Stockton, Ca
2010 E350
From my experience with a 2010 E350, there is also the possibility of the secondary air pump making the noise. Mine had dust build up over the years and it gradually made a loud supercharge-like whine. The unit commonly turns on at start-up and intermittently when the car is idling. If I recall correctly, it works hand in hand with O2 sensor. What I noticed is the unit does considerably turn on more frequently in warmer weather. After I changed it, the whine-like noise went away. Hope this help.
Last edited by xMaximus; Apr 28, 2019 at 11:01 AM.
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