when the program memory 9 is full an update of the program memory 9 is carried out in which the last valid data elements of the correcting parameters are stored as new initial data elements but other previously applied data elements are erased so that there again is enough memory space for an eventual continuation of the coordination procedure in the program memory 9 the coordination procedure especially can be conducted in an installation condition of the transmission of the correcting system and of the control unit such as to be found in the subsequent production vehicles this means in reverse conclusion that in production vehicles a subsequent application is also possible if needed even if the initial data elements of the correcting parameters have been written in the program memory 9 the above also applies when new applied data elements are written in the ram memory of the control unit 15 in which sufficient reserved memory is also usually available in this case it is possible for the new data elements written in the ram memory to omit even an additional address memory field since it is always possible in the ram memory to write over data elements but to the initial data elements listed in the program memory 9 an address memory field 12 is also obviously assigned the memory address is then entered on which the new data elements for the correcting parameter concerned have been written in the ram memory it is conceivable that.