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As the lane change is in progress, Overtake
Acceleration is activated, allowing Model S to
accelerate closer to a vehicle in front (see
Overtake Acceleration on page 79). Midway
through the lane change, Auto Lane Change
must be able to detect the target lane's
outside lane marking. If this lane marking
cannot be detected, both Auto Lane Change
and Autosteer will cancel.
Note: Auto Lane Change assists in moving
Model S one lane at a time. Moving into an
additional lane requires you to engage the
turn signal a second time after the
first lane
change is complete.
Warning: If Auto Lane Change aborts
during a lane change (for example, Auto
Lane Change cannot detect the outside
of the target lane midway through the
lane change), Model S returns to its
original driving lane.
When Auto Lane Change is active, it is
important to monitor its performance by
watching the driving path in front of you and
the surrounding area. Stay prepared to take
over steering at any time. As you are crossing
over into the adjacent lane, the instrument
panel displays the lane marking as a dashed
blue line. Once in your new lane, lane markings
are displayed as solid blue lines again.
In situations where Auto Lane Change is
unable to operate at optimal performance, or
cannot operate due to inadequate data, the
instrument panel displays a series of warnings.
Therefore, when using Auto Lane Change,
always pay attention to the instrument panel
and be prepared to manually steer Model S.
Warning:
When Auto Lane Change is
actively assisting in steering Model S, the
steering wheel moves accordingly.
Although you must have your hands on
the steering wheel, any significant
restriction of or force on the steering
wheel's movement can cancel both Auto
Lane Change and Autosteer.
Canceling Auto Lane Change
Auto Lane Change cancels when you manually
move the steering wheel, press the brake
pedal, or disengage the turn indicator before
Model S crosses the markers on the existing
lane.
To disable Auto Lane Change so it is no longer
available, touch Controls > Settings > Driver
Assistance > Auto Lane Change > OFF.
Limitations
Auto Lane Change is particularly unlikely to
operate as intended in the following types of
situations:
• Auto Lane Change is unable to accurately
determine lane markings. For example,
lane markings are excessively worn, have
visible previous markings, have been
adjusted due to road construction, are
changing quickly (lanes branching
o,
crossing over, or merging), objects or
landscape features are casting strong
shadows on the lane markings, or the road
surface contains pavement seams or other
high-contrast lines.
• A vehicle is detected in your blind spot
when you engage the turn signal.
• The road has sharp curves.
• Visibility is poor (due to heavy rain, snow,
fog, etc.) or weather conditions are
interfering with sensor operation.
• Bright light (oncoming headlights or
direct sunlight) is interfering with the view
of the camera(s).
• A sensor or camera is damaged or
obstructed (such as by mud, fog, ice,
snow, etc.).
• The sensors are
aected by other
electrical equipment or devices that
generate ultrasonic waves.
• Model S is being driven very close to a
vehicle in front of it, which is blocking the
view of the camera(s).
Warning:
Many unforeseen circumstances
can impair the operation of Auto Lane
Change. Always keep this in mind and
remember that as a result, Auto Lane
Change may not assist in steering
Model S appropriately. Always drive
attentively and stay prepared to
immediately take action at any time.
Auto Lane Change
86 Model S Owner's Manual
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