This is L3, so you don’t have to constantly supervise like you do a Tesla with FSD (L2). Mercedes even says you can watch movies or read books. They will achieve a minimum safety condition on their own, which for this system is stopping in the lane with hazard lights on. They also say they will take liability provided you haven’t misused the system or failed to properly maintain the car.

But L3 has this grey area where you can be notified to take over with sufficient time. IMO, It’s the most ambiguous level of automation. How this will work in practice, I have no idea.