Hello, yesterday I separated my SC-805 from the power. After that: CODE… The previous owner knows of nothing, the card is not there. So this morning quickly to the Volvo dealer, paid 16 € and let me spend the code on the VIN. So far, so good, only the code doesn’t work, grrr, and now I am at OFF… Wasn’t there even a method to calculate the code using the radio serial number or using diode arrangements? Does someone know something more accurate? TIA + mfg, pgs