Miele H6160B Operating And Installation Instructions page 13

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For the oven to function correctly, it requires a sufficient intake of
cool air. Ensure the intake of cool air to the oven is not impaired
(e.g. due to the installation of insulation material inside the housing
unit). Furthermore, the incoming cool air must not be excessively
heated by other heat sources (e.g. fuel furnaces).
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If the oven is installed behind a furniture door, do not close the
door while the oven is in operation. Heat and moisture would build
up behind a closed furniture door, potentially causing damage to the
oven, the furniture unit and the flooring. Wait until the oven has
cooled down completely before closing the furniture door.
Warning and Safety instructions
13