In my peugeot 407 version is 7.10.C-16
Can I install 8.31 skipping the 8.11 and 8.20 ?
You can update it directly to FW 8.31 with CD 4x.
Firmware 8.20 is not available in MEGA links (for a downgrade 8.31 to 8.20 )
You can't move to an earlier version your firmware, or send your material to the factory.
But doable with the necessary knowledge.
Ok thank you, Bricoman, for theses informations.
what do you mean with necessary knowledge? have you got an idea to downgrade RT4 without sending to factory? (unmounting hdd for example?)
I am ready for this.
On my Peugeot 308 I have only the message "Please insert Upgrade CD" down is 2.13.
Can someone tell me can I install a version 8.11 or 8.20 or 8.31, ore what should I do.