Miele H 7260 BP Operating And Installation Instructions page 13

Accessories
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Only use original Miele accessories. If other parts are used,
warranty, performance and product liability claims will be invalidated.
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The Miele gourmet oven dish HUB 5000/HUB 5001 (if available)
must not be inserted into shelf level 1. This will damage the floor of
the oven. The lack of clearance will create an accumulation of heat
which can cause the enamel to crack or flake off. Never place a
Miele oven dish on the upper support of shelf level 1 either as it will
not be secured by the non-tip safety notches. As a general rule, use
shelf level 2.
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Remove all accessories as well as the runners and any extra
accessories such as FlexiClip runners from the oven interior before
starting the Pyrolytic cleaning programme.
The high temperatures needed for pyrolysis will damage them.
Warning and safety instructions
13