Oh alright, I'll stop being lazy and look
It's camera-based.
• While the DRIVE PILOT feature is engaged, it con-
tinuously monitors the fallback-ready user’s ability
to resume driving when requested (e.g., s/he is not
permitted to sleep, leave the driver’s seat, etc.).
• After issuing a request for the fallback-ready user to resume driving, DRIVE PILOT continues safely operating the vehicle until the person resumes driving, or, if s/he fails to do so, brings the vehicle automatically to a controlled stop while turning on the hazard warning lamps. What DRIVE PILOT will not do is rely on the fallback-ready user to manage an urgent and hazardous situation. Instead, DRIVE PILOT will continue to operate the vehicle until the fallback-ready user is able to resume driving or the vehicle is brought to a controlled stop.
DRIVE PILOT continuously
monitors (in compliance with applicable data protection laws; see “Data Recording”) the fallback-ready user’s ability to respond to potential requests by the feature to resume driving. Behaviors that would inhibit the fallback-ready user’s ability to take over driving in a timely manner, such as sleeping, are prohibited and, when detected, will cause the system to issue a series of escalating warnings. If those warnings are ignored DRIVE PILOT will automatically bring the vehicle to a controlled stop while turning on the hazard lamps.
If the driver remains unresponsive, DRIVE PILOT will
secure the vehicle from rolling away, seek aid by placing an emergency call to our response center, and prepares the vehicle for emergency assistance by unlocking the doors.
54 page pdf here:
https://www.google.com/url?sa=t&source= ... dwD82Tpai0
