Tesla S Owner's Manual page 46

Instrument Panel
Indicator Description
A door or trunk is open. See Using Exterior Door Handles on page 6.
Flashes green when the left turn signal is operating. Both turn signal
indicators flash green when the hazard warning flashers are operating.
Flashes green when the right turn signal is operating. Both turn signal
indicators flash green when the hazard warning flashers are operating.
Model S is in Tow mode and can roll freely. It does not automatically shift
into Park when you exit. See Instructions for Transporters on page 142.
46 Model S Owner's Manual