AEG COMPETENCE 5150 B Operating Instructions Manual page 27

Fold down grill/top heating element in the main oven.
The grill/top heating element can be folded down to facilitate
occasional cleaning of the oven roof.
Warning! Before you proceed ensure that the element is
cold and all the oven controls are switched off.
Turn the 2 holding screws to the centre. The element folds down
giving you access to the oven roof (see illustration)
Warning! Do not force the element too far down otherwise
you run the risk that it breaks off.
After cleaning, push the element upward and turn the hooks back
ensuring that the
crossbar of the element
is secured within the
hooks.
The hooks must not be clipped over the element.