AC high pitched, whistling noise on e320
Thread Starter
Junior Member
Joined: Jun 2007
Posts: 43
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From: E San Jose, CA & E Honolulu, HI
99 E320 4matic Wagon, 02 F250 Super Duty 7.3 4x4, 06 E55 AMG Estate
AC high pitched, whistling noise on e320
Just noticed the irritating whirling AC noise on a 99 e320 4matic wagon when on normal auto mode. However, when i press the 'recirc' button, the noise disappears. Any advice as to what may be causing it and how to fix wd be great for a newbie.
PS-car was in for 'B' service which included changing cabin filters.
PS-car was in for 'B' service which included changing cabin filters.
MBWorld Fanatic!
Joined: Mar 2006
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From: West Virginia
2001 E320 RWD - Brilliant Silver/Ash: 100,000+
I do not understand what you are describing as "whirling" but here goes:
When I started my car on a cold morning, something started screeching and lasted for a few seconds; it seemed to emanate from the center climate control vents on the dashboard.
I was on my way to my dealer at the time and asked that they check it out. There were no error codes stored and they could not duplicate the problem. If I were to hazard a guess, I think it was a fan motor acting up, but it has never happened again.
When I started my car on a cold morning, something started screeching and lasted for a few seconds; it seemed to emanate from the center climate control vents on the dashboard.
I was on my way to my dealer at the time and asked that they check it out. There were no error codes stored and they could not duplicate the problem. If I were to hazard a guess, I think it was a fan motor acting up, but it has never happened again.
Member
Joined: Oct 2004
Posts: 197
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1997 E320 (silver/black)
Something to think about...
when you car is in normal A/C mode, the blower is pulling air in thru the cabin filters from the outside. When in re-circulate mode, it would just be pushing around air already inside the car. I don't think the cabin filters would come into play. I would ask the dealer to re-check the installation of the cabin filters. Does the volume of the noise change as you vary the speed of the fan? If so, that's more evidence that it could be the air filters.
Thread Starter
Junior Member
Joined: Jun 2007
Posts: 43
Likes: 3
From: E San Jose, CA & E Honolulu, HI
99 E320 4matic Wagon, 02 F250 Super Duty 7.3 4x4, 06 E55 AMG Estate
that whistling, whirling sound only is apparent when the fan is on high and i only noticed it after the cabin filters were replaced. i took it back to the shop but as was bound to happen, the noise wasn't there when i took it back.
husk--are you serious about the compressor about to fail?
husk--are you serious about the compressor about to fail?
MBWorld Fanatic!
Joined: Mar 2006
Posts: 1,627
Likes: 5
From: West Virginia
2001 E320 RWD - Brilliant Silver/Ash: 100,000+
If that is the case, I hope you have some sort of warranty coverage because the quote I was given to replace my leaking compressor on my last 1998 E430 was pretty expensive. So expensive in fact that I traded it at a substantial loss for what I have now.
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Joined: Aug 2007
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From: West Des Moines, Iowa
'97 E320
