An arrangement in a vehicle for automatically setting settable vehicle functions in accordance with previous settings for a user of the vehicle, characterized in - that a tachograph having two slots (2, 3) for smart cards that is connected to a vehicle internal bus is adapted, in response to insertion into at least one of the slots (2, 3) of the tachograph of an authorization card with a user specific code as a smart card, to supply the user specific code of the inserted card to the vehicle internal bus, and - that separate control units (ECU1, ECU2... ECUn) associated with the respective settable vehicle function (SU1, SU2... SUn) are connected to the vehicle internal bus to receive the user specific code, wherein each control unit comprises a parameter memory for recording user identities and settings related to the identities, each control unit (ECU1, ECU2... ECUn) being adapted to check, for each card inserted into at least one of the slots (2, 3) of the tachograph, whether the user specific code of the card and any setting of the corresponding, settable vehicle function (SU1, SU2... SUn) for the user are recorded in the parameter memory of the control unit and, if that is the case, to set the settable function (SU1, SU2... SUn) as recorded and, if that is not the case, to record the user specific code and any setting of the settable function made for the user in the parameter memory of the control unit, while the card is in one of the slots (2, 3) of the tachograph, wherein preferred settings of vehicle functions (SU1, SU2... SUn) for potential users of a vehicle are recorded in advance in the parameter memory of the control units (ECU1, ECU2... ECUn) of the vehicle together with the identities of the potential users of the vehicle, wherein each control unit is adapted to save the latest settings made by the user in the parameter memory together with the identity of the user upon withdrawal of the authorization card. - that a tachograph having two slots (2, 3) for smart cards that is connected to a vehicle internal bus is adapted, in response to insertion into at least one of the slots (2, 3) of the tachograph of an authorization card with a user specific code as a smart card, to supply the user specific code of the inserted card to the vehicle internal bus, and - that separate control units (ECU1, ECU2... ECUn) associated with the respective settable vehicle function (SU1, SU2... SUn) are connected to the vehicle internal bus to receive the user specific code, wherein each control unit comprises a parameter memory for recording user identities and settings related to the identities, each control unit (ECU1, ECU2... ECUn) being adapted to check, for each card inserted into at least one of the slots (2, 3) of the tachograph, whether the user specific code of the card and any setting of the corresponding, settable vehicle function (SU1, SU2... SUn) for the user are recorded in the parameter memory of the control unit and, if that is the case, to set the settable function (SU1, SU2... SUn) as recorded and, if that is not the case, to record the user specific code and any setting of the settable function made for the user in the parameter memory of the control unit, while the card is in one of the slots (2, 3) of the tachograph, wherein preferred settings of vehicle functions (SU1, SU2... SUn) for potential users of a vehicle are recorded in advance in the parameter memory of the control units (ECU1, ECU2... ECUn) of the vehicle together with the identities of the potential users of the vehicle, wherein each control unit is adapted to save the latest settings made by the user in the parameter memory together with the identity of the user upon withdrawal of the authorization card.