I have claimed in warranty an issue with software management as I consider it should not work this way, let me know if it happens the same to you.
Customization screen, I fix colour for ambient light, brightness and engine sound through speakers on sport mode.
Once the car is turned off, these selections dissapear and I have to do It all over again.
If I don’t make any choice, sometimes light is off and sometimes is basic red even at brightness menu appears as disconnected.
I hope it is clear enough how my car IS working to see if it is common for all DS4.
I share the experience that the ‘active sound’ thing on Sport mode is not being saved; you have to re-enable it every time. The other ones should be saving just fine. Although I’m not fully sure if they are being saved if you use the Guest profile of the infotainment system, haven’t tried that.
In my case it works very well.
Polyambient and screen colours are tied to drive profile for example in normal mode I have standard gold colour in polyambient and screen but in Eco polyambient and screens are set to green and it works perfectly.
Never had any issues with it.