Miele DA 3668 Operating And Installation Instructions page 53

 Pull the grease filters out of the slots
in the front of the cooker hood
housing.
The spacer strip needs to be attached
to the back of the cooker hood housing
before the cooker hood is installed in
the wall unit. The spacer strip can be
attached to the upper  or lower edge
 of the deflector plate.
 Calculate the measurement T for the
spacer strip
 Cut the spacer strip to measurement
T. Score along the groove for the
smaller measurement as shown, and
remove the surplus.
 Screw the spacer strip to the back of
the cooker hood at the required
position. Use the screws supplied. To
attach the spacer strip to the lower
edge  use the screws previously
removed from the housing unit.
Installation
53