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Originally Posted by ants_oz
Yeah, you see that's where I obviously got confused - with your description. That left side is not a fan control - it is an airflow control. There is only one fan, up front in the core..
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Just to be clear...since some members don't have model/model year/build date info in a signature...there are 2 types of rear air vents for the e53. Some have the optional "rear climate control" which has an extra blower in the vent (located in the center console)...and the dial on the left side turns the blower off/on...plus there's an icon of a fan blade above the dial that indicates to turn the blower on.
As mentioned in the owners manual...the front IHKA control panel still can affect how the air blows from this rear vent. Make sure that you have the DASH VENT selected (not AUTO) if you want the most air this rear vent can give:
(rear vent when the "rear climate control" with blower is optioned on the vehicle)
(rear vent with NO rear climate blower option...just the "I" & "0" icons above & below the left dial)
