Miele KM 7564 FR Operating And Installation Instructions page 51

Activating the safety lock
 Touch and hold the  and
 sensors at the same time for
6 seconds.
The seconds can be seen counting
down in the timer display. When this
time has elapsed  will appear in the
timer display. The safety lock is
activated.
Deactivating the safety lock
 Touch and hold the  and
 sensors at the same time for
6 seconds.
 will appear briefly in the timer
display and then the seconds will count
down. The safety lock is deactivated
once the time has elapsed.
Safety features
51