Well Miele in the UK got on to the technical bods in Germany and provided a sequence to unlock the demo mode. Apparantly the model does have one. All sorted now.
Here is the sequence should anyone need it for future reference:
Press and hold the Start/Stop button while switching the unit on with the On/Off switch.
As soon as the Start/Stop illumination ring lights constantly, after approx. 5 sec., release the Start/Stop button.
Immediately press and hold the Start/Stop button until the Demo-Mode is activated, approx. 4 seconds.
Demo-Program deactivation: Follow the instruction for Demo-Mode access above.
Guy
December 2007