Klarstein ARIA SELECT SMART Manual página 71

Note: The blender jug must be firmly seated on the base of the appliance,
otherwise you will not be able to remove the blade.
To remove the dough hook, proceed as follows:
1 Place the blender jar in the correct orientation onto the unit base and secure.
2 Grasp the top of the blade post, press down firmly, rotate clockwise, and then
pull straight up to remove.
Note: The blender jug must be firmly seated on the base of the appliance,
otherwise you will not be able to remove the blade.
EN
71