E-Class (W211) 2003-2009

Oil fume from hvac

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Old Dec 2, 2019 | 12:50 AM
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84 300d 2009 e320 bluetec (retired)/, now 2012 E350 4-matic blueefficiency automatic
Oil fume from hvac

Oil fumes are coming from the air intake of the hvac into the car.
1. any way to program the recirculating to stay on unless manual turned off?
2. Any way to pipe fresh air to the intake filter instead of air above the exhaust pipe?
3. An inexpensive fix?

oil leak is in bell housing. Can find the exact reason but suspect rear crank seal leaking rate is 3 drops overnight - 1 liter 10,000 miles.

Last edited by dave2001auto; Dec 2, 2019 at 12:55 AM.
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Old Dec 2, 2019 | 05:13 PM
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1922 Ford Model T / no OBD
I understand you are getting engine bay fumes into your cabin?
That would be indication of bad seal between engine bay and cabin intake air in the gutter.
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Old Dec 9, 2019 | 08:11 PM
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84 300d 2009 e320 bluetec (retired)/, now 2012 E350 4-matic blueefficiency automatic
The air is sucked in from the right firewall through at filter. See link:
https://www.pelicanparts.com/techart...r_Removal.htm#

The wind splashes the oil on the exhaust below the filter. The fume gets sucked through the exposures underside of the filter.
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