Miele S500 Operating Instructions Manual page 36

^ Open the dust compartment lid.
^ Release the catch and remove the
filter.
^ Insert the new filter so that it engages
at the back, then close the catch.
^ Close the dust compartment lid firmly
until it clicks into place.
The filter change indicator (Reset
button 7) must be reset each time the
filter is replaced. To do this, the vacuum
cleaner must be plugged in.
^ Press the filter change indicator light
until it goes out. The display is now
reset.
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