Tesla MODEL S - Speed Assist

Speed Assist
How Speed Assist Works
Model S displays a speed limit on the
instrument panel and you can choose if and
how you are warned when you exceed the
speed limit. Also, instead of using the
detected speed limit, you can base warnings
on an arbitrary speed limit that you enter
manually.
In situations where Model S is unable to
determine a speed limit, or if Speed Assist is
uncertain that an acquired speed limit is
accurate, the instrument panel may not
display a speed limit sign and warnings do not
take eect.
If you set the speed limit warning to Display
(see Controlling Speed Assist on page 116)
and exceed the determined speed limit, the
speed limit sign on the instrument panel
increases in size.
If you set the speed limit warning to Chime
(see Controlling Speed Assist on page 116)
and exceed the determined speed limit, the
speed limit sign on the instrument panel
increases in size and Model S also sounds a
warning chime.
Note: Speed limit warnings go away after ten
seconds, or when Model S slows down below
the specified limit.
Warning:
Do not rely on Speed Assist to
determine the appropriate speed limit or
driving speed. Always drive at a safe
speed based on trac and road
conditions.
Controlling Speed Assist
To adjust the Speed Limit Warning setting,
touch Controls > Autopilot > Speed Limit
Warning, then choose one of these options:
• O - Speed limit warnings do not display
and chimes are not sounded.
• Display - Speed limit signs display on the
instrument panel and the sign increases in
size when you exceed the determined
limit.
• Chime - In addition to the visual display, a
chime is sounded whenever you exceed
the determined speed limit.
You can also specify how the speed limit is
determined:
• Relative - You can set a speed limit oset
(+ or -) if you want to be alerted only
when you exceed the oset speed limit by
a specified amount. For example, you can
increase the oset to +10 mph (10 km/h) if
you only want to be warned when you
exceed the speed limit by 10 mph (10
km/h).
Note: The oset from speed limit also
aects the number shown in the gray
speedometer icon on the left side of the
driving speed on the instrument panel.
• Absolute - Manually specify any speed
limit between 20 and 140 mph (30 and
240 km/h).
Note: Speed Assist is not always accurate. A
road's location can be miscalculated and
instead Speed Assist can display a speed for a
directly adjacent road that may have a
dierent speed limit. For example, Speed
Assist can assume Model S is on a freeway or
highway when it is actually on a nearby
surface street, and vice versa.
Note: Your chosen setting is retained until you
manually change it. It is also saved in your
driver profile.
Limitations and Inaccuracies
Speed Assist may not be fully functional or
may provide inaccurate information in these
situations:
Speed Assist
116 Model S Owner's Manual