The car is limited to autodriving itself
As for those new Autopilot speed limits, the release notes (as captured by Teslarati) say that:
All in all, that seems like a fair trade.
Autosteer is now restricted on residential roads without a center divider. When Autosteer is engaged on a restricted road, Model S's speed will be limited to the speed limit of the road plus an additional 5 mph. When entering such a restricted road, Model S will reduce its speed if necessary and wll do so even if you increase the cruise control set speed.
UPDATE: We got Tesla's official Release Notes on the 7.1 software update, and have added them below. Here's how Tesla describes how to use the Autopark feature in the notes:
To prepare to park your vehicle, align Model S within 33 feet of the final parking space so Model S can move straight into the space in either Drive or Reverse. With Model S in Park, stand within 10 feet of the vehicle and press and hold the center button on your key fob until the hazard lights flash continuously. While the hazard lights are flashing, press the frunk button once on the key fob to drive Model S forward into the parking space or the trunk button once on the key fob to back Model S into the parking space. Model S will move up to 33 feet or until the sensors detect an obstacle, at which point parking is considered completed and Autopark will shift the car to Park.