Miele KM 452 Operating Instructions Manual page 12

Before using for the first time, clean the
cooktop with a damp cloth and then dry
with a soft cloth.
The metal components of the cooktop
have a protective coating which may
give off a slight odor the first time the
appliance is heated.
The smell will dissipate after a short
time and does not indicate a faulty
connection or appliance defect.
12
This cooktop has electronic touch
controls activated by a finger. There is a
separate touch control for each burner.
A tone sounds to indicate that contact
has been made with a control.
Keep the control area clean and do not
rest things on it. The touch control
sensors could mistake an item or debris
for a finger tip contact, turning the
cooktop on or off.
To prevent damage to the
electronics never place hot pans on
the control panel.