Miele WWR860 Operating Instructions Manual page 24

Before using for the first time
 Remove the foil from the detergent
cartridge.
 Open the access panel for TwinDos.
24
 Push the UltraPhase 1 detergent
cartridge into compartment 1 until it
locks into position.
The following message will appear in
the display:

Now enter the settings for UltraPhase 2.