Summon was included in the Tesla Version 7.1 software update, which was automatically sent out wirelessly to all Model S vehicles, including Consumer Reports’ P85D test car. We’ve tried the feature, and found it can be useful, but we also felt that Tesla’s implementation posed an avoidable safety concern of the car potentially having low-speed impact with objects or walls. We contacted Tesla about our findings and the company has agreed to update the system to make it safer.