Miele KM 7404 FX Operating And Installation Instructions page 48

Safety features
Activating the safety lock
 Touch and hold the + sensor.
 Also touch the  sensor and hold
the two sensor controls 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 + sensor.
 Also touch the  sensor and hold
the two sensor controls 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.
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