Tesla may be ready to enable more self-driving features in its newest cars before the end of December, Elon Musk tweeted tonight. "Looks like we might be ready to rollout most of Autopilot functionality for HW2 towards the end of next week," the Tesla CEO said, referring to the hardware introduced to new Tesla vehicles in October.

The company said at the time that Autopilot 2 offered “full self-driving capabilities," but not all of the features were enabled at launch. The company said at the time that it needed to “further calibrate the system using millions of miles of real-world driving” before features like automatic emergency braking, collision warnings, and active cruise control would be available. Several of these features had actually been included in the previous version of Autopilot, but Tesla said that they would need to be "robustly validated" before they would be reintroduced.

Looks like we might be ready to rollout most of Autopilot functionality for HW2 towards the end of next week — Elon Musk (@elonmusk) December 23, 2016

That validation sounds like it's well under way, but it's not clear yet exactly which features will be coming — Musk's indication that "most" will be here soon suggests a handful may still require further testing. In an earlier tweet, Musk said that the Tesla Autopilot vision neural net was now working well, but that the company "just need to get a lot of road time to validate in a wide range of environments."