Miele W 308 Operating Instructions Manual page 41

For safety reasons the drum door cannot be opened if the suds temperature is
higher than 55°C.
Put the plug in the socket and switch on.
Switch the machine on with the I-On/0-Off button.
Open the drum door as described in the section
"Opening the door in the event of a power failure".
Press hard against the lock side of the drum door
and then press the Door button.
Clean the fluff (drain) filter and the drain pump.
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