Level 3 autonomy is exactly that. Mercedes allows you to do other things than driving in specific situations like specific (!) highways etc.
BMW also has Level 3 on low speeds on specific highways.
This is not autonomy in all situations but only during the day, no rain etc.
For limited situations the car fully takes over and in case of an accident it is legally Mercedes’ or BMW’s responsibility not the driver.
That specific situation is indicated by the lights.
It will not drive autonomously in a city or so or where pedestrians are.
There’s mashups of both.