I've just bought a Vauxhall Zafira but I don't have the code for tha radio - can anyone halp? VDO330886636 \no.24 469 302 CDR500(E) 2F4 the numbers under the barcodes are 9022 214 03757 02 003 0241 1277306 and engraved on the side GM050021277306
Unfortunately the majority of SIEMENS/VDO codes (including your CDR500) will NOT be available for free (or cheap) from anywhere on the Internet as access is required to the original factory database...which is not commercially available..
Try your Main Dealer or a Decoding Service or your local Car Radio / Audio Shop (who are normally the cheapest option) who will connect it to a laptop to read/recode the memory chip (EEPROM)