The heating element is kept in place by two black clips on each side of the element.

Put two metal spudgers on each side of the heating element, between the element and the casing, next to the black clips.

Apply a bit of outward force to free up space for the heating element to slide out.

Gently pull on the two wires coming out of the heating element to pull it out of its casing.

Put the old heating element away.