Arrangement for controlling functions of a work machine , comprising: an electronically readable identification means which is assigned to an operator of the work machine , an operator interface which can be actuated by the operator , a processor which is assigned to the work machine and is connected or can be connected to the operator interface , and at least one device of the work machine and/or of a unit associated with the work machine , the function of which can be switched on and off by the processor , wherein the processor is programmed to read the identification means and to receive, via the operator interface , an input and/or selection of a desired function of the device which is assigned to the identification means in a stored authorization database , characterized in that authorizations which are assigned to the identification means and are intended to enable the device are stored in the authorization database , in that the processor is programmed to enable the desired function, for a period which is limited, stipulated or can be specified by means of the operator interface , in response to the input and/or selection of the desired function and to make it possible for the device to be used by the operator if an authorization assigned to the desired function is entered in the authorization database , in that the authorization database is stored on a central computer which is at a distance from the work machine and has a wireless, bidirectional communication connection to the processor , and in that the processor is programmed to transmit a data record with regard to the selected function and possibly the specified period and/or associated costs to the central computer , and the central computer is programmed to create billing data for the selected enabling on the basis of the received data record. an electronically readable identification means which is assigned to an operator of the work machine , an operator interface which can be actuated by the operator , a processor which is assigned to the work machine and is connected or can be connected to the operator interface , and at least one device of the work machine and/or of a unit associated with the work machine , the function of which can be switched on and off by the processor , wherein the processor is programmed to read the identification means and to receive, via the operator interface , an input and/or selection of a desired function of the device which is assigned to the identification means in a stored authorization database , characterized in that authorizations which are assigned to the identification means and are intended to enable the device are stored in the authorization database , in that the processor is programmed to enable the desired function, for a period which is limited, stipulated or can be specified by means of the operator interface , in response to the input and/or selection of the desired function and to make it possible for the device to be used by the operator if an authorization assigned to the desired function is entered in the authorization database , in that the authorization database is stored on a central computer which is at a distance from the work machine and has a wireless, bidirectional communication connection to the processor , and in that the processor is programmed to transmit a data record with regard to the selected function and possibly the specified period and/or associated costs to the central computer , and the central computer is programmed to create billing data for the selected enabling on the basis of the received data record. <EOS>