Fiat Panda Owner's Handbook Manual page 238

If the ejected CD is reloaded without having removed
it completely from the slot, the radio will not switch
to the CD source.
Possible error messages
If the CD loaded cannot be read (e.g. a CD ROM has
been inserted or the CD is inserted upside down or
there is reading error) the display will show the
wording "CD Disc error".
The CD will then be ejected and the audio source
activated prior to the CD mode selection will be
heard.
With an external audio source activated (TA, ALARM
or Phone), the CD that cannot be read will not be
ejected until these functions have ended. At the end,
with the CD mode activated, the display will show
the text "CD Disc error" for a few seconds and then
the CD will be ejected.
If the CD player overheats CD playback could be
temporarily interrupted. The radio will automatically
switch to the Radio (Tuner) mode and the display will
show "CD hot" and then "CD disc error".
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