Bosch BSGL4000GB Instructions For Use Manual page 13

Changing the dust bag and filters
Seal the dust bag by pulling the sealing strip and remove the bag.
Slide the new dust bag into the holder to the stop.
!
Caution: the lid will only close if a dust bag has been inserted.
Cleaning the motor protection filter
The motor protection filter should be cleaned regularly by knocking out
the dirt or rinsing it out.
Open the dust bag compartment lid.
Pull out the motor protection filter in the direction of the arrow.
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