Management system for the shared use of vehicles, the system comprising: • a central data processing file; • a control module installed in each vehicle managed by the system; • a wireless communication apparatus of a user for wireless communication with the central data processing file and the control module; • a key bit adapted to mechanically fit into a contact lock on a steering column of a vehicle and provided at an accessible location inside a passenger compartment of each vehicle managed by the system; and • an intelligent key part provided in each vehicle managed by the system and comprising vehicle opening, vehicle closing and vehicle starting and stopping functionality, wherein • the intelligent key part comprises three elements located on a printed circuit board of the intelligent key part: ∘ two elements for the central remote control of the vehicle, one for opening and one for closing the vehicle, and ∘ one transponder element for causing the vehicle to be ready for use by the user when the key bit is inserted in the contact lock and turned; • the intelligent key part is incorporated into the control module; • the control module further comprises means for wireless communication with the wireless communication apparatus of the user; • the wireless communication apparatus of the user is adapted to download a virtual key from the central data processing file, the virtual key comprising an address of the means for wireless communication of the control module, an access or identification code and an authentication code; • the wireless communication apparatus of the user is further adapted to transmit the virtual key to the means for wireless communication of the control module; • the means for wireless communication of the control module are adapted to receive the virtual key and transmit it to the intelligent key part by a wired connection to the printed circuit board of the intelligent key part; • the intelligent key part is adapted to steer its two elements for the central remote control of the vehicle on the basis of the access or identification code in the received virtual key, the steering being performed through wired connections running over its printed circuit board and causing said elements to open resp. close the vehicle; and • the intelligent key part is further adapted to cause its transponder element to exchange an authentication with a motor management system of the vehicle on the basis of the received virtual key such that the vehicle is ready for being started or stopped when the key bit is inserted in the contact lock and turned. • a central data processing file; • a control module installed in each vehicle managed by the system; • a wireless communication apparatus of a user for wireless communication with the central data processing file and the control module; • a key bit adapted to mechanically fit into a contact lock on a steering column of a vehicle and provided at an accessible location inside a passenger compartment of each vehicle managed by the system; and • an intelligent key part provided in each vehicle managed by the system and comprising vehicle opening, vehicle closing and vehicle starting and stopping functionality, • the intelligent key part comprises three elements located on a printed circuit board of the intelligent key part: ∘ two elements for the central remote control of the vehicle, one for opening and one for closing the vehicle, and ∘ one transponder element for causing the vehicle to be ready for use by the user when the key bit is inserted in the contact lock and turned; ∘ two elements for the central remote control of the vehicle, one for opening and one for closing the vehicle, and ∘ one transponder element for causing the vehicle to be ready for use by the user when the key bit is inserted in the contact lock and turned; • the intelligent key part is incorporated into the control module; • the control module further comprises means for wireless communication with the wireless communication apparatus of the user; • the wireless communication apparatus of the user is adapted to download a virtual key from the central data processing file, the virtual key comprising an address of the means for wireless communication of the control module, an access or identification code and an authentication code; • the wireless communication apparatus of the user is further adapted to transmit the virtual key to the means for wireless communication of the control module; • the means for wireless communication of the control module are adapted to receive the virtual key and transmit it to the intelligent key part by a wired connection to the printed circuit board of the intelligent key part; • the intelligent key part is adapted to steer its two elements for the central remote control of the vehicle on the basis of the access or identification code in the received virtual key, the steering being performed through wired connections running over its printed circuit board and causing said elements to open resp. close the vehicle; and • the intelligent key part is further adapted to cause its transponder element to exchange an authentication with a motor management system of the vehicle on the basis of the received virtual key such that the vehicle is ready for being started or stopped when the key bit is inserted in the contact lock and turned.