A locking system with an emergency opening function for a vehicle door, the system comprising: - a lock device; and - an emergency opening device; wherein the lock device comprises at least one door lock for releasably holding the vehicle door in a closed state of the vehicle door and an electric motor for opening the at least one door lock; and wherein the emergency opening device for emergency opening of the vehicle door is provided as an additional opening device for opening the lock device and has an actuator arrangement with at least one actuator for generating an opening force, which is in a mechanical operative connection with the lock device; wherein the emergency opening device has a manually operable activation device with which the actuator arrangement is activatable for emergency opening of the vehicle door; wherein the actuator arrangement for redundant emergency opening force generation has as primary actuator an electric drive for generating a primary opening force and as secondary actuator a manual drive for generating a secondary opening force, which are in mechanical operative connection with the lock device; wherein in the event of a failure of the primary actuator, the emergency opening of the door lock device is effected by the secondary actuator; and wherein the manually operable activation device is movable from an initial position ( P 0) into a first position ( P 1) in order to activate the primary actuator in the first position to generate the primary opening force; and into a second position ( P 2) in order to generate the secondary opening force with the activation device. - a lock device; and - an emergency opening device; wherein the lock device comprises at least one door lock for releasably holding the vehicle door in a closed state of the vehicle door and an electric motor for opening the at least one door lock; and wherein the emergency opening device for emergency opening of the vehicle door is provided as an additional opening device for opening the lock device and has an actuator arrangement with at least one actuator for generating an opening force, which is in a mechanical operative connection with the lock device; wherein the emergency opening device has a manually operable activation device with which the actuator arrangement is activatable for emergency opening of the vehicle door; wherein the actuator arrangement for redundant emergency opening force generation has as primary actuator an electric drive for generating a primary opening force and as secondary actuator a manual drive for generating a secondary opening force, which are in mechanical operative connection with the lock device; wherein in the event of a failure of the primary actuator, the emergency opening of the door lock device is effected by the secondary actuator; and wherein the manually operable activation device is movable from an initial position ( P 0) into a first position ( P 1) in order to activate the primary actuator in the first position to generate the primary opening force; and into a second position ( P 2) in order to generate the secondary opening force with the activation device. wherein the lock device comprises at least one door lock for releasably holding the vehicle door in a closed state of the vehicle door and an electric motor for opening the at least one door lock; and wherein the emergency opening device for emergency opening of the vehicle door is provided as an additional opening device for opening the lock device and has an actuator arrangement with at least one actuator for generating an opening force, which is in a mechanical operative connection with the lock device; wherein the emergency opening device has a manually operable activation device with which the actuator arrangement is activatable for emergency opening of the vehicle door; wherein the actuator arrangement for redundant emergency opening force generation has as primary actuator an electric drive for generating a primary opening force and as secondary actuator a manual drive for generating a secondary opening force, which are in mechanical operative connection with the lock device; wherein in the event of a failure of the primary actuator, the emergency opening of the door lock device is effected by the secondary actuator; and wherein the manually operable activation device is movable from an initial position ( P 0) into a first position ( P 1) in order to activate the primary actuator in the first position to generate the primary opening force; and into a second position ( P 2) in order to generate the secondary opening force with the activation device.