Miele PUR 98 D Operating And Installation Instructions page 37

 Remove the grease filters from the
hood.
 Insert the safety screw on the inside.
 With recirculation mode (RM)
ventilation hoods, insert the OdorFree
Charcoal Filter.
 Carefully remove the protective foil
from the grease filters.
 Reinsert the grease filters.
Installation
37