FIAT Panda - Manual (Page 257)

If an incorrect code is entered, the radio will emit a
sound and the display shows the text "Radio
blocked/wait" to notify the user of the need to enter
the correct code.
Each time the user enters an incorrect code, the
waiting time will gradually increase (1 min, 2 min, 4
min, 8 min, 16 min, 30 min, 1 h, 2 h, 4 h, 8 h, 16 h, 24
h) up to a maximum of 24 hours.
The waiting time will be shown on the display with
the text "Radio blocked/wait". After the text has
disappeared it is possible to start the code entering
procedure again. Car radio passport
This document certifies the ownership of the car
radio. The car radio passport shows the radio model,
serial number and secret code.
Note
Keep the car radio passport in a safe place so that
you can give the information to the relevant
authorities if the car radio is stolen.
In case of loss of the car radio passport, contact the
Fiat Dealership, taking an ID document and the car
ownership documents.
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YSTEM