Miele KM 5758 - Manual (Page 46)

The cooktop must not be permanently
sealed into the countertop when
installed. The sealing strip under the
edge of the cooktop provides a
sufficient seal for the countertop.
If the cooktop is sealed into position,
the countertop or appliance could
be damaged if the cooktop needs to
be removed for maintenance or
service.
Installation
46