system
A chat on subreddit /r/wallstreetbets
human
Their higher autonomy is a legal designation that they will take liability in a crash.  For that reason it only applies is in extremely limited circumstances.  Right now it's only level 3 on the highway at low speeds.  Which basically means while stuck in a traffic jam on a road where no one ever turns.  Tesla FSD and other manufactures autopilots have also been able to handle this for years.  It's just that Mercedes has been the first to be willing to take liability for it.  It's not like a real level 2 vs level 3 distinction in terms of capability.
gpt
In my opinion this is an essential step to self driving...

I mean, i can lay a brick on the gaspedal of an old ford and call it self driving if i take no responsibility for the outcome...

Autonomous driving where i'm legally not allowed to not take care of the driving simly is not autonomous driving.

The manufacturer not really beein liable for what the car does while driving for itself means no autonomous driving.

Everything that requires me to still keep my eyes on the road and my hands on the wheel is just a fancy drivers assistant, not autonomous driving