I need a code for my Fiesta car radio but not sure if serial number is corr?

I need a code for my Ford Fiesta radio after replacing the car battery. Unfortunately I cannot get the radio out of the dashboard to get the serial number (I have no record of it as I bought the car second hand with only the registration paperwork). 3 garages have also tried to remove the radio with the correct tool with no joy. I have just tried pressing keys 1 and 6 on the radio together (as someone advised to get the serial number) and the following letters/numbers came up:

MGP then DJ5 then 4-04 with 001 at the lefthand side bottom of the digital display. Is this the coreect serial code does anyone know? It doesn't look like others I found on the web.

If so if there is anyone who can kindly give me a code to try I would be extremely grateful! (The Ford Fiesta is 1998 Ford Ghia 1242cc and radio is 5000 RD E.O.N.)

Kate
December 2009