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  #1  
Old 12-17-2003, 12:59 PM
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Join Date: Nov 2002
Location: Charleston, SC
Posts: 77
Heat/Air Duct problem???

As the subject line indicates, I'm not sure what kind of problem I have.

When I start up my 95 E320 wagon, there is a sort of muffled pop under the dash behind (I think) the center vents.

The image I have is of a baffle that is opening...sticking, then opening with a pop.

Thinking it was probably a baffle in the air duct work, I've tried to duplicate it by switching to the various climate control modes, but it only happens on start-up.

I've searched the forum and gone through my CD looking for something...but haven't found anything yet that sounds like the culprit.

Anybody have an idea?

Thanks,

AH
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  #2  
Old 12-17-2003, 01:11 PM
MikeTangas's Avatar
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Join Date: Apr 2000
Location: So. Cal
Posts: 4,430
Sounds like the main flap slamming open/shut as soon as it receives vacuum from the now started engine. The 560 does that if I have the ACC set to off, it slams with a solid thud on start-up.
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'73 280SEL 4.5 (9/72)- RIP
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  #3  
Old 12-17-2003, 07:43 PM
jc300e's Avatar
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Join Date: May 2000
Location: Location: Norcross, GA
Posts: 124
my 92 400e does similar.... a muffled "thud - thud -thud" when the heater temps are used. I've also noticed that I do not have airflow from my passenger floor vent...

Could that be the vacuum attempting to open a stuck passenger floor vent flap? If so, is it accessable for easy repair?
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