Tesla MODEL S 2012 Owner's Manual page 53

The turn signals stop operating when canceled by the
steering wheel, or when you return the stalk to the
central position.
When a turn signal is operating,
the corresponding turn signal
indicator lights up on the
instrument panel and a clicking
sound can be heard.
WARNING: When actively using Traffic-Aware
Cruise Control (if equipped), engaging a turn
signal can cause Model S to accelerate in specific
situations (see Overtake Acceleration on page
80).
WARNING: When actively using Autosteer (if
equipped), engaging a turn signal can cause
Model S to change lanes (see
on page 84).
Hazard Warning Flashers
To turn on the hazard warning flashers, press the button
located on the side of the touchscreen closest to the
steering wheel. All turn signals flash. Press again to turn
off.
NOTE: Hazard warning flashers operate even without a
key nearby.
Driving
Auto Lane Change
Lights
51