Miele EGW 4060-14 Operating Instructions Manual page 7

Before using the ptate warmer
[] Clean the plate warmer with a damp
cloth and wipe dry,
[] Heat the empty plate warmer for a
minimum of 2 hours. Turn the
temperature selector to "Maximum"
(see "Selecting a temperature"),
[] Vent the room when heating the
drawer for the first time,
Metal components have a protective
coating which may give off a slight odor
the first time your new appliance is
heated. The smell will dissipate after a
short time and does not indicate a
faulty connection,