Miele DG 155-1 Operating Instructions Manual page 16

The display is set to show the
temperatures in °F but it can be
programmed to show °C.
Please check that the program selector
is set to "0".
^ Press and hold the button while
turning the program selector to
DESCALE k.
^ Release the button.
4 1 will appear in the display.
^ Press the z/g repeatedly until F9
appears in the display.
^ Press the button.
C9 will appear in the display.
^ Turn the program selector to "0".
The conversion is now stored.
16
If you wish to revert back to °F follow
the previous instructions until C9
appears in the display.
^ Press the
button.
p
k
F9 will appear in the display.
^ Turn the program selector to "0".