C5 headunit version

[mcirsta]

I recently bought a Citroen C5 exclusive ( 180 hp ) registered in 2017 ( probably made in 2016 ). I have touch screen infotainment system and I've found the settings menu ( where you can do the factory reset and such ) but how can I find out what firmware version it's running ?
From a little digging that I've done online it seems it might be a SMEG+IV2 headunit. Is there a hidden way to access the system version information ?

[mcirsta]

I was able to answer my own question. First thing that was needed was a reset to factory settings. Otherwise the hidden version menu would not appear and also things would crash resulting in a reboot of the headunit.
Once a reset to factory settings was done keeping the virtual settings button on the touch screen pressed for about 5s revealed the hidden version menu. I've attached a picture of it here.
As I suspected it seems to be SMEG+IV2 , version : "SMEG6.1.D.R19"