Does your blindspot monitor not come available if you program your specific trailer?
In any case, the driver assist features like lane centering and bc are deactivated to prevent going out of control with a badly loaded trailer. It makes perfect sense that they don't allow it.
Definitely could be software related. Have a scroll through all the settings and the status indicators for revision level of updates.
There is also a maintenance info screen that can be accessed through keypresses.
Search the forums for the full details.
Some people also had module...
Your dealer is incompetent and full of bologna.
No, it's your dealer. I doubt being ev has anything to do with it either, they'd most likely rip you off with any vehicle you brought there.
Name and shame, at least save someone else the hassle of visiting them.