I have read somewhere recently that the radio code number is on a sticker, sometimes located under the hood, elswhere I'm not sure.  I don't know how the code is entered either.  Try googleing for radio codes, even better use the manufacturer if known.

Good luck, hope this helps ...

Per my 2000 booklet, the security code is entered with the preset
buttons numbered 1 through 6.

If a beep sound occurs while entering the code, start over with the
first digit.

If the code is not entered successfully in three tries, you must leave
the radio on for one hour before the radio will accept three additional
attempts.

Roger

Hi,
Your local Jag dealer (or original dealer as noted on the service book)
should have it on their database, they ommitted to provide me with the code
when I purchased mine and have since changed the battery without referring
to myself for the code.

I had a similar problem with my last car bought privately and obtained the
code through the dealer without charge, they may need proof of ownership and
will need the original registration.

Hope this helps.
Howard
XKR 1999

I think a dealer can take the radio serial number and do something.
thats how I found mine out.