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Old 12-10-2001, 03:04 PM
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Join Date: Aug 2001
Location: Florida
Posts: 26
Smile Vacuum Leak

I would like to THANK all of you for your generous help in finding a vacuum leak in my 1994 C280.

I found a disconnected white hose near the oil filter area. I believe this is the cause for the air not to blow out through the center vents but at the defrost outlet instead after 2 minutes the car started. This lost of vacuum problem also caused my rear headrests could not be released.

I had this very same problem 3 years ago, and the dealer shop charged lots of money for the parts replacement and labor. I fully believe this caused by the guy who performed the oil change and after replaced the oil filter. A simple reconnection of the vacuum hose with a rubber connector would fix the whole dawn problem.

A problem remains. I couldn't find the place that this white / clear hose was disconnected from ! Could any one help ? A picture show where this hose goes to would be a great help. Many thank in advance.

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Old 12-14-2001, 08:27 PM
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Join Date: Dec 2000
Posts: 368
This hose has to plug into the intake. It is very hard to see anything back there, especially since the manifold is made out of one piece (there are no openings in between). I suggest you get a mirror and try to locate the plug. It should be next to the actuator.


Last edited by vinamg; 12-14-2001 at 08:45 PM.
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Old 12-17-2001, 11:54 AM
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Join Date: Aug 2001
Location: Florida
Posts: 26

Thanks Vin

Some more exploration to do
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