Hi, my problem is with a SIEMENS? CD 5404 MP X instaled in my rover 45. I don´t know where the code tarjet is, and when i change the battery, the radio shows CODE. The characteristics and numbers writen in the label are: MG ROVER XQE000940PMA VDCD3242003940 A2C53099318 CG000513003940 Some help, please.