Miele KM 412 Operating Instructions Manual page 12

Before using the appliance for the first
time, clean it with a damp cloth and
then dry with a soft cloth.
Do not use liquid dish soap. This
can leave a permanent blue sheen
on the ceramic surface.
12
Metal components have a protective
coating which may give off a slight odor
the first time your new appliance is
heated.
The odor and any vapors will dissipate
after a short time and do not indicate a
faulty connection or appliance defect.