Tesla doesnt have anything called "Enhanced cruise control" so whatever that is, its what THAT dealer is choosing to call those words.
Tesla has "Autopilot", "Enhanced autopilot" and "Full self driving" as feature names for their lane keeping car features. "Enhanced cruise control" means nothing (and certainly does not necessarily mean "enhanced autopilot" if the car is not coming from Tesla.
Perhaps you are telephone gaming the text in the listing, and it actually says "enhanced autopilot"?
The list of features in each of the three things i listed above is described by tesla here:
Autopilot is an advanced driver assistance system that enhances safety and convenience behind the wheel. When used properly, Autopilot reduces your overall workload as a driver. Learn more about Autopilot.
www.tesla.com
If its "enhanced autopilot" (and not "enhanced cruise control") then it has all the features of autopilot + most of the features from full self driving... however if its a non tesla dealer, I would ignore "enhanced cruise control" as its possible for a 2019 to have anything from no autopilot features standard, autopilot, enhanced autopilot, or full self driving.