Hope someone can help me.

Bought a second hand Ford Fiesta at the weekend and when I got back to my parents and tried re-starting it the battery was as flat as a pancake. Charged the battery up but now the radio needs a security code. The garage arent being particularly helpful.

Make of radio is 4500 RS EON and the Serial number is M606833

Does anyone know where I can get the code for this as the page at the back of the manual where its supposed to be is blank.

Thanks