R250 VW Audi Dashboard Programmer's main function:You can use R250 to program Siemens/VDO new cryptography system. R250 looks like a small box that needs to be connected to a PC running Win98/Me/XP. You only need to solder a few wires to the board, read back the actual value and then write the new value with no limitations at all. Just one thing: remember that this interface works only with boards made by Siemens VDO featuring a Micronas microcontroller CDC3217 or CDC3297 and 24c32 or 2432 memory.