Sorry for not having quoted the exact paragraph in my very first comment. You can find the reference just above; it stops to work at around 90 mph (150 km/h) -

Sorry for not having quoted the exact paragraph in my very first comment. You can find the reference just above; it stops to work at around 90 mph (150 km/h) - Tesla Model S manual, Collision Avoidance Assist, page 95. Additional limitations are listed in page 96.