Some news on Intelligent Speed Assist.
It would seem Tesla has updated the user manual (at least for M3)
https://www.tesla.com/ownersmanual/model3/en_eu/GUID-C2FBB4F9-EDC1-4E18-AEE4-D1BCC23B01A3.html
Excludes United Kingdom, Northern Ireland, Iceland, Turkey, Israel: A chime sounds when you...