It is easy to remove a SEAT radio. You will need a flat-head screwdriver & a prying tool for removing the panels surrounding the radio.
Some radio models require release keys to remove your radio from the head unit.
Press the keys into place, with little pressure this will free the unit to be taken out.
SEAT serials are a combination of 14 digits & letters, for example SEZ1Z3F6412082. Please see image for reference.
All SEAT serial numbers begin SEZ followed by unique numbers thereafter, ensure all the information is correct.