When it is very cold, the Supercharger cable becomes stiff from the cold and is hard to maneuver into a charge port. Suggest adding a heating wire into the Supercharger cable, and turning it on when a Model S gets near to the cable. This could make the cable more flexible and easier to manage.
Suggested by Opafiets in the Tesla Motors forum.
A thin liquid-cooled/heated Supercharger cable was released in June-2015 at the Mountain View, CA Supercharger. The version 3 Superchargers use this new design.