Removing a Fiat radio is easy and requires no technical skill.
First you need radio release keys to remove the radio, these are for sale online or from a local Halfords store.
Push the keys into either side of the radio, this will free the unit to be taken out.
Once you have the radio release keys, push them into the 4 holes in each corner of the radio See image.
Apply a little pressure and the radio will release from the dashboard. The radios label will be located on the radio's casing.
There are different models of Fiat radio, each have different serials, yours will be similar to one of the following examples:
815 CM 1234 B 1234567