First of all.
thank you very much for this thread.
I installed succesfully the new firmware in my Peugeot 308SW (2015).
But i am not really satisfied with this software, because of the problem with the sound of the radio.
Is there anyone who can explain, how to install an older firmware (5.4) to the smeg+ ?
If I try to install it, I get the message, that a newer software is already installed and I cannot install the older firmware.