Bosch BGL 4 Series Operating Instruction page 41

● If
completely
the
dust
yet
need
been
First
hose
dust
● The
to
Unlock
direction
Open
Close
Take
Insert
Push
the
been
The filter
by
● Open
Release
pulling
the
Clean
dirt.
If
rinsed.
● The filter
hours.
After fit
the
compartment
This
pack
● Open
Release filter
in
Remove
The filter
● The filter
hours.
40
filled
filter
filter
filter
24
filter
filter
filter.
24
Remove
micro-hygiene filter
Insert filter
in
If
this
● Open
Unlock filter
the
the
Insert filter
After fine
protection filter
microhygiene filter
Always
from
vacuum
with
If
with
duster/
Subject
filter.
filter,
filter
filter.
fications.