Thr Video Recorder i have is quiet Old and the Producer could Not help me. So i w as very glad to find an offer for the owners Manual for a very fair Price.a I obtained the original Manual very quick and I am happy to have it now.
Text excerpt from page 16 (click to view)
Inserting the Shelf and Universal Baking Tray
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Anti-tip device All slide-in units have a small bulge on the left and right. This bulge is an anti-tip device and must always point to the rear of the oven. Tray or universal baking tray: The anti-tip device must point towards the rear of the oven.
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Inserting shelf: Insert the shelf unit with both guide rails pointing upwards. The anti-tip device must point downwards and be positioned to the rear of the oven compartment.
Inserting shelf and tray: When the shelf unit and universal baking tray are used together, carefully place the shelf anti-tip device in the bulges on the tray.