A cylinder lock assembly comprising: - a rotary knob device comprising a rotary knob stator and a rotary knob rotor rotatably mounted in the rotary knob stator; - a cylinder lock device comprising a cylinder lock stator and a cylinder lock rotor rotatably mounted in the cylinder lock stator ; - a lock bit which is rotatably mounted with respect to the rotary knob device and the cylinder lock device ; and - a coupling device , wherein the coupling device extends along a longitudinal axis (L) and is transferable into at least an engaged state and a disengaged state, characterized in that the coupling device comprises a cylinder lock-rotor coupler , a rotary knob-rotor coupler rotatably mounted with respect to at least a first direction of rotation (d1), a lock bit coupler , and at least one engagement element , wherein the coupling device can be coupled or is coupled to the cylinder lock rotor via the cylinder lock-rotor coupler , wherein the coupling device can be coupled or is coupled to the rotary knob rotor via the rotary knob-rotor coupler , wherein the coupling device can be coupled or is coupled to the lock bit via the lock bit coupler , wherein the coupling device can be transferred from the engaged state to the disengaged state by a rotation of the rotary knob-rotor coupler with respect to the first direction of rotation (d1), wherein the engagement element is engaged with the cylinder lock-rotor coupler in the engaged state, and wherein the engagement element is disengaged from the cylinder lock-rotor coupler in the disengaged state, so that the lock bit coupler is rotatable relative to the cylinder lock-rotor coupler in the disengaged state. - a rotary knob device comprising a rotary knob stator and a rotary knob rotor rotatably mounted in the rotary knob stator; - a cylinder lock device comprising a cylinder lock stator and a cylinder lock rotor rotatably mounted in the cylinder lock stator ; - a lock bit which is rotatably mounted with respect to the rotary knob device and the cylinder lock device ; and - a coupling device , wherein the coupling device extends along a longitudinal axis (L) and is transferable into at least an engaged state and a disengaged state, characterized in that the coupling device comprises a cylinder lock-rotor coupler , a rotary knob-rotor coupler rotatably mounted with respect to at least a first direction of rotation (d1), a lock bit coupler , and at least one engagement element , wherein the coupling device can be coupled or is coupled to the cylinder lock rotor via the cylinder lock-rotor coupler , wherein the coupling device can be coupled or is coupled to the rotary knob rotor via the rotary knob-rotor coupler , wherein the coupling device can be coupled or is coupled to the lock bit via the lock bit coupler , wherein the coupling device can be transferred from the engaged state to the disengaged state by a rotation of the rotary knob-rotor coupler with respect to the first direction of rotation (d1), wherein the engagement element is engaged with the cylinder lock-rotor coupler in the engaged state, and wherein the engagement element is disengaged from the cylinder lock-rotor coupler in the disengaged state, so that the lock bit coupler is rotatable relative to the cylinder lock-rotor coupler in the disengaged state. wherein the engagement element is engaged with the cylinder lock-rotor coupler in the engaged state, and wherein the engagement element is disengaged from the cylinder lock-rotor coupler in the disengaged state, so that the lock bit coupler is rotatable relative to the cylinder lock-rotor coupler in the disengaged state. <EOS>