VISTEON FIAT - code entry

[Rdecode]

There are similar models (MID and CONNECT) of VISTEON made FIAT (STILO PALIO etc) radios.

I got several manuals, with hte similar but a bit different code entry procedures:

============================
Switch radio ON, display shows "RADIO M-CODE ----"

Press preset " 1 " repeatedly for 1st digit
Press preset " 2 " repeatedly for 2nd digit
Press preset " 3 " repeatedly for 3rd digit
Press preset " 4 " repeatedly for 4th digit

Press preset "5" to enter the code
============================

Some manuals say:
Press preset "5" to enter the code
and others
Press preset "6" to enter the code


So, the question is what is the right button to confoirm the code: 5 or 6 ??? or it doesn't mattrer and works in both cases?

Thank in in advance

P.S.
I aatached the sample image of the front panel

401756