Miele SmartLine Tepan Yaki Operating And Installation Instructions page 13

Cleaning and care

Do not use a steam cleaning appliance to clean the Tepan plate.
The steam could reach electrical components and cause a short
circuit.

If the Tepan plate is built in over a pyrolytic oven, it should not be
used whilst the pyrolytic process is being carried out, as this could
trigger the overheating protection mechanism on the Tepan plate
(see relevant section).
Warning and Safety instructions
13