The news here is not so much working on parking sensors but rather the folding mirrors and upgrade to P85 from 85 as a retrofit. "Thanks for contacting us with your questions about the retrofit options for Model S. We are working on the retrofit process for the three options that you’ve mentioned, Parking Sensors, Power Folding Mirrors, and the Performance Options. As we have not made any official announcements regarding pricing or availability, I do not have any information there about. I will forward your feedback over to our manufacturing and service teams, and hopefully we’ll have more information over the upcoming weeks on pricing and availability to provide to you. If you have any additional questions or concerns, contact us email@example.com or email me directly."