Your radio is made by CLARION and the only CLARION code that can be calculated (using a serial number ) anywhere on the Internet is if your radio also has a BARCODE SERIAL NUMBER beginning with C 7000000 + + + + on a separate label somewhere on the metal casing. (Note ...not beginning with CL.)
If you do not have the label with the reference (C70000001234)
Example photo:
This is only valid for radios (CLARION) with serial number CLxxxxxxxxxxxx
CLARION = Peugeut CLARION = Citroen And CLARION = FIAT