I tried a radio decoding service,but they can't unlock it. Why is this model so special and other more complicated cd's or navigations can be unlocked? This cassete players come with a small plastic sticker with the series number of the radio and the code for it. The person a bought it from lost the sticker and the car didnt run for about one year and the battery died . I tried talking with the Bmw dealer here in Romania,but they dont know anything and they said thatthey cant give me such information .