BMW X3 2004 Owner's Manual page 64

Microfilter
The built-in microfilter removes dust and
pollen from the incoming outside air. it is
replaced when maintenance is performed
by your BMW Sports Activity Vehicle Cen-
ter. A substantial reduction in air supply
indicates that the filter must be replaced
before normal maintenance.
Defrosting windows and removing
condensation
1 Fan blower rotary switch for air supply
at setting 4
2 Turn the rotary temperature switch as
far to the right as it will go
3 Rotary switch for air distribution in posi-
tion
4 Switch on the rear window defroster to
defrost the rear window
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