2021 CHRYSLER 300 Owners Manual

STARTING AND OPERATING 95
Adaptive Cruise Control (ACC) Operation
The buttons on the right side of the steering wheel
operate the ACC system.

Adaptive Cruise Control Buttons

Adaptive Cruise Control (ACC) Menu
The instrument cluster display will show the
current ACC system settings. The information it
displays depends on ACC system status. Push the ACC on/off button until one of the
f
ol

lowing appears in the instrument cluster display:
Adaptive Cruise Control Off
When ACC is deactivated, the display will read
“ A

daptive Cruise Control Off.”
Adaptive Cruise Control Ready
When ACC is activated, but the vehicle speed
s e

tting has not been selected, the display will read
“Adaptive Cruise Control Ready.”
Adaptive Cruise Control Set
When the SET (+) or the SET (-) button is pushed,
t h

e display will read “ACC SET.”
When ACC is set, the set speed will show in the
in
strument cluster display.
The ACC screen may display once again if any of
th
e following ACC activity occurs:
System Cancel
Driver Override
System Off
ACC Proximity Warning
ACC Unavailable Warning
The instrument cluster display will return to the last
d i

splay selected after five seconds of no ACC
display activity.
Does not always fully recognize complex
driving conditions, which can result in
wrong or missing distance warnings.
Will bring the vehicle to a complete stop
while following the vehicle in front and
hold the vehicle for two seconds in the
stop position. If the vehicle in front does
not start moving within two seconds the
ACC system will display a message that
the system will release the brakes and
that the brakes must be applied manually.
An audible chime will sound when the
brakes are released.
You should switch off the ACC system:
When driving in fog, heavy rain, heavy snow,
sleet, heavy traffic, and complex driving situa -
tions (i.e., in highway construction zones).
When entering a turn lane or highway off
ramp; when driving on roads that are winding,
icy, snow-covered, slippery, or have steep
uphill or downhill slopes.
When towing a trailer up or down steep slopes.
When circumstances do not allow safe driving
at a constant speed.
WARNING!
1 — CANC/Cancel
2 — Fixed Speed Cruise Control On/Off
3 — Adaptive Cruise Control (ACC) On/Off
4 — Distance Setting Decrease
5 — SET (+)/Accel
6 — RES/Resume
7 — SET (-)/Decel
8 — Distance Setting Increase
4

96 STARTING AND OPERATING
Activating Adaptive Cruise Control (ACC)
The minimum set speed for the ACC system is
20 mph (32 km/h).
When the system is turned on and in the ready
s t

ate, the instrument cluster displays “ACC Ready.”
When the system is off, the instrument cluster
di
splay will read “Adaptive Cruise Control (ACC)
Off.”
NOTE:
You cannot engage ACC under the following condi -
tions:
When the brakes are applied
When the parking brake is applied
When the gear selector is in PARK, REVERSE or
NEUTRAL
When the vehicle speed is below the minimum
speed range
When the brakes are overheated
When the driver’s door is open at low speeds
When the driver’s seat belt is unbuckled at low
speeds
When there is a stationary vehicle in front of
your vehicle in close proximity
To Activate/Deactivate
Push and release the Adaptive Cruise Control
(ACC) on/off button. The ACC menu in the
instrument cluster displays “ACC Ready.”
To turn the system off, push and release the
A d

aptive Cruise Control (ACC) on/off button again.
At this time, the system will turn off and the
instrument cluster displays “Adaptive Cruise
Control (ACC) Off.”
To Set A Desired ACC Speed
When the vehicle reaches the speed desired, push
the SET (+) button or the SET (-) button and
release. The instrument cluster display will show
the set speed.
NOTE:
Fixed Speed Cruise Control can be used without
A C
C enabled. To change between the different
modes, push the ACC on/off button which turns
the ACC and the Fixed Speed Cruise Control off.
Pushing the Fixed Speed Cruise Control on/off button will result in turning on (changing to) Fixed
Speed Cruise Control mode.
If ACC is set when the vehicle speed is
be
low
20 mph (32 km/h), the set speed will default to
2 0

mph (32 km/h).
NOTE:
Fixed Speed Cruise Control cannot be set below
2 0
mph (32 km/h).
If either system is set when the vehicle speed is
a b

ove 20 mph (32 km/h), the set speed shall be
t h
e current speed of the vehicle.
NOTE:
Keeping your foot on the accelerator pedal can
cause the vehicle to continue to accelerate
beyond the set speed. If this occurs, the
message “DRIVER OVERRIDE” will display in the
instrument cluster display.
WARNING!
Leaving the Adaptive Cruise Control (ACC)
system on when not in use is dangerous. You
could accidentally set the system or cause it to
go faster than you want. You could lose control
and have a collision. Always leave the system off
when you are not using it.
WARNING!
In Fixed Speed Cruise Control mode, the system
will not react to vehicles ahead. In addition, the
proximity warning does not activate and no
alarm will sound even if you are too close to the
vehicle ahead since neither the presence of the
vehicle ahead nor the vehicle-to-vehicle distance
is detected. Be sure to maintain a safe distance
between your vehicle and the vehicle ahead.
Always be aware which mode is selected.

STARTING AND OPERATING 97
If you continue to accelerate beyond the set
speed while ACC is enabled, the system will not
be controlling the distance between your vehicle
and the vehicle ahead. The vehicle speed will
only be determined by the position of the accel
-
erator pedal.
To Cancel
The following conditions cancel the ACC or Fixed
Speed Cruise Control systems:
The brake pedal is applied
The CANC button is pushed
The Anti-Lock Brake System (ABS) activates
The gear selector is removed from the DRIVE
position
The braking temperature exceeds normal range
(overheated)
The Electronic Stability Control/Traction Control
System (ESC/TCS) activates
The vehicle parking brake is applied
The following conditions will only cancel the ACC
s y

stem:
Driver seat belt is unbuckled at low speeds
Driver door is opened at low speeds
To Turn Off
The system will turn off and erase the set speed in
memory if:
The Adaptive Cruise Control (ACC) on/off button
is pushed
The Fixed Speed Cruise Control on/off button is
pushed
The ignition is placed in the OFF position
To Resume
If there is a set speed in memory, push the RES
(resume) button and remove your foot from the
accelerator pedal. The instrument cluster display
will show the last set speed.
Resume can be used at any speed above 20 mph
(3

2 km/h) when only Fixed Speed Cruise Control is
b e
ing used.
Resume can be used at any speed above 0 mph
(0

km/h) when ACC is active.
To Vary The Speed Setting
To Increase Or Decrease The Set Speed
After setting a speed, you can increase the set
s p

eed by pushing the SET (+) button, or decrease
speed by pushing the SET (-) button.
U.S. Speed (mph)
Pushing the SET (+) , or SET (-) button once will
result in a 1 mph speed adjustment. Each
s u
bsequent tap of the button results in an
adjustment of 1 mph.
If the button is continually pushed, the set
speed will continue to adjust in 5 mph incre-
ments until the button is released. The new set
sp
eed is reflected in the instrument cluster
display.
Metric Speed (km/h)
Pushing the SET (+) , or SET (-) button once will
result in a 1 km/h speed adjustment. Each
s u
bsequent tap of the button results in an
adjustment of 1 km/h.

If the button is continually pushed, the set speed
will continue to adjust in 10 km/h increments
u n
til the button is released. The new set speed is
reflected in the instrument cluster display.

NOTE:
When you override and push the SET (+ ) button or
SET (-) buttons, the new set speed will be the
current speed of the vehicle.
WARNING!
The Resume function should only be used if
traffic and road conditions permit. Resuming a
set speed that is too high or too low for
prevailing traffic and road conditions could
cause the vehicle to accelerate or decelerate too
sharply for safe operation. Failure to follow these
warnings can result in a collision and death or
serious personal injury.
4

98 STARTING AND OPERATING
When ACC Is Active:
NOTE:
When you use the SET (-) button to decelerate, if
the engine’s braking power does not slow the
vehicle sufficiently to reach the set speed, the
brake system will automatically slow the
vehicle.
The ACC system applies the brake down to a full
stop when following the vehicle in front. If your
vehicle follows the vehicle in front to a standstill,
your vehicle will release the brakes two seconds
after coming to a full stop.
The ACC will bring the vehicle to a complete stop
while following a vehicle in front and hold the
vehicle for two seconds in the stop position. If
the vehicle in front does not start moving within
two seconds, the ACC system will display a
message that the system will release the brakes
and that the brakes must be applied manually.
An audible chime will sound when the brakes
are released.
The ACC system maintains set speed when
driving uphill and downhill. However, a slight
speed change on moderate hills is normal. In
addition, downshifting may occur while climbing
uphill or descending downhill. This is normal
operation and necessary to maintain set speed.
When driving uphill and downhill, the ACC
system will cancel if the braking temperature
exceeds normal range (overheated).
Setting The Following Distance In ACC
The specified following distance for ACC can be set
by varying the distance setting between four bars
(longest), three bars (long), two bars (medium) and
one bar (short). Using this distance setting and the
vehicle speed, ACC calculates and sets the
distance to the vehicle ahead. This distance
setting displays in the instrument cluster display.

Distance Settings

To increase the distance setting, push the
D i

stance Setting Increase button and release.
Each time the button is pushed, the distance
setting increases by one bar (longer). To decrease the distance setting, push the
D
i

stance Setting Decrease button and release.
Each time the button is pushed, the distance
setting decreases by one bar (shorter).
If there is no vehicle ahead, the vehicle will
ma
intain the set speed. If a slower moving vehicle
is detected in the same lane, the instrument
cluster display will show the ACC Set With Target
Detected Indicator Light, and the system will adjust
the vehicle speed automatically to maintain the
distance setting, regardless of the set speed.
The vehicle will then maintain the set distance
u n

til:
The vehicle ahead accelerates to a speed above
the set speed.
The vehicle ahead moves out of your lane or
view of the sensor.
The distance setting is changed.
The system disengages Ú page 96.
The maximum braking applied by ACC is limited;
h ow

ever, the driver can always apply the brakes
manually, if necessary.
NOTE:
The brake lights will illuminate whenever the ACC
s y
stem applies the brakes.
A Proximity Warning will alert the driver if ACC
pr
edicts that its maximum braking level is not
sufficient to maintain the set distance. If this
1 — Longest Distance Setting (Four Bars)
2 — Medium Distance Setting (Two Bars)
3 — Long Distance Setting (Three Bars)
4 — Short Distance Setting (One Bar)

STARTING AND OPERATING 99
occurs, a visual alert “BRAKE” will flash in the
instrument cluster display and a chime will sound
while ACC continues to apply its maximum braking
capacity.
NOTE:
The “BRAKE!” screen in the instrument cluster
d i
splay is a warning for the driver to take action
and does not necessarily mean that the Forward
Collision Warning system is applying the brakes
autonomously.
Overtake Aid
When driving with ACC engaged and following a
vehicle, the system will provide an additional
acceleration up to the ACC set speed to assist in
passing the vehicle. This additional acceleration is
triggered when the driver utilizes the left turn
signal (Lane Change Assist feature included) and
will only be active when passing on the left hand
side. Switching lanes will not impact the ACC
system if the driver is already traveling at the set
speed.
ACC Operation At Stop
In the event that the ACC system brings your
vehicle to a standstill while following the vehicle in
front, your vehicle will resume motion without any
driver interaction if the vehicle in front starts
moving within two seconds of your vehicle coming
to a standstill. If the vehicle in front does not start moving within
t
w

o seconds of your vehicle coming to a standstill,
the ACC with Stop system will cancel and the
brakes will release. A cancel message will display
on the instrument cluster display and produce a
warning chime. Driver intervention will be required
at this moment.
While ACC with Stop is holding your vehicle at a
s t

andstill, if the driver seat belt is unbuckled or the
driver door is opened, the ACC with Stop system
will cancel and the brakes will release. A cancel
message will display on the instrument cluster
display and produce a warning chime. Driver
intervention will be required at this moment.
Display Warnings And Maintenance
“WIPE FRONT RADAR SENSOR IN FRONT OF
VEHICLE” WARNING
The “ACC/FCW Unavailable Wipe Front Radar
Sensor” warning will display and a chime will
indicate when conditions temporarily limit system
performance. This most often occurs at times of poor visibility,
s
u

ch as in snow or heavy rain. The ACC system may
also become temporarily blinded due to
obstructions, such as mud, dirt or ice. In these
cases, the instrument cluster will display the above
message and the system will deactivate.
This message can sometimes be displayed while
d r

iving in highly reflective areas (i.e. ice and snow,
or tunnels with reflective tiles). The ACC system will
recover after the vehicle has left these areas.
Under rare conditions, when the radar is not
tracking any vehicles or objects in its path this
warning may temporarily occur.
NOTE:
If the “ACC/FCW Unavailable Wipe Front Radar
S e
nsor” warning is active, Fixed Speed Cruise
Control is still available.
If weather conditions are not a factor, the driver
s h

ould examine the sensor. It may require cleaning
or removal of an obstruction. The sensor is located
in the center of the vehicle behind the lower grille.

To keep the ACC system operating properly, it is
im
portant to note the following maintenance items:

Always keep the sensor clean. Carefully wipe the
sensor lens with a soft cloth. Be careful not to
damage the sensor lens.
Do not remove any screws from the sensor.
Doing so could cause an ACC system malfunc -
tion or failure and require a sensor realignment.
WARNING!
When the ACC system is resumed, the driver
must ensure that there are no pedestrians,
vehicles or objects in the path of the vehicle.
Failure to follow these warnings can result in a
collision and death or serious personal injury.
4

100 STARTING AND OPERATING
If the sensor or front end of the vehicle is
damaged due to a collision, see an authorized
dealer for service.
Do not attach or install any accessories near the
sensor, including transparent material or after -
market grilles. Doing so could cause an ACC
s y

stem failure or malfunction.
When the condition that deactivated the system is
no
longer present, the system will return to the
“Adaptive Cruise Control Off” state and will resume
function by simply reactivating it.
NOTE:
If the “ACC/FCW Unavailable Wipe Front Radar
Sensor” message occurs frequently (e.g. more
than once on every trip) without any snow, rain,
mud, or other obstruction, have the radar
sensor realigned at an authorized dealer.
Installing a snow plow, front-end protector, an
aftermarket grille or modifying the grille is not
recommended. Doing so may block the sensor
and inhibit ACC/FCW operation.
“CLEAN FRONT WINDSHIELD” WARNING
The “ACC/FCW Limited Functionality Clean Front
Windshield” warning will display and also a chime
will indicate when conditions temporarily limit
system performance. This most often occurs at
times of poor visibility, such as in snow or heavy
rain and fog. The ACC system may also become temporarily blinded due to obstructions, such as
mud, dirt, or ice on windshield and fog on the
inside of glass. In these cases, the instrument
cluster display will display “ACC/FCW Limited
Functionality Clean Front Windshield” and the
system will have degraded performance.
This message can sometimes be displayed while
d
r

iving in adverse weather conditions. The ACC/
FCW system will recover after the vehicle has left
these areas. Under rare conditions, when the
camera is not tracking any vehicles or objects in its
path this warning may temporarily occur.
If weather conditions are not a factor, the driver
s h

ould examine the windshield and the camera
located on the back side of the inside rearview
mirror. They may require cleaning or removal of an
obstruction.
When the condition that created limited
f u

nctionality is no longer present, the system will
return to full functionality.
NOTE:
If the “ACC/FCW Limited Functionality Clean Front
W i
ndshield” message occurs frequently (e.g. more
than once on every trip) without any snow, rain,
mud, or other obstruction, have the windshield and
forward facing camera inspected at an authorized
dealer.
SERVICE ACC/FCW WARNING
If the system turns off, and the instrument cluster
displays “ACC/FCW Unavailable Service Required”
or “Cruise/FCW Unavailable Service Required”,
there may be an internal system fault or a
temporary malfunction that limits ACC
functionality. Although the vehicle is still drivable
under normal conditions, ACC will be temporarily
unavailable. If this occurs, try activating ACC again
later, following an ignition cycle. If the problem
persists, see an authorized dealer.
Precautions While Driving With ACC
In certain driving situations, ACC may have
detection issues. In these cases, ACC may brake
late or unexpectedly. The driver needs to stay alert
and may need to intervene. The following are
examples of these types of situations:
TOWING A TRAILER
Towing a trailer is not recommended when using
ACC.

STARTING AND OPERATING 101
OFFSET DRIVING
ACC may not detect a vehicle in the same lane that
is offset from your direct line of travel, or a vehicle
merging in from a side lane. There may not be
sufficient distance to the vehicle ahead. The offset
vehicle may move in and out of the line of travel,
which can cause your vehicle to brake or
accelerate unexpectedly.

Offset Driving Condition Example

TURNS AND BENDS
When driving on a curve with ACC engaged, the
system may decrease the vehicle speed and
acceleration for stability reasons, with no target
vehicle detected. Once the vehicle is out of the
curve the system will resume your original set
speed. This is a part of normal ACC system
functionality.
NOTE:
On tight turns ACC performance may be limited.
T h
e driver must maintain control of the vehicle,
remain alert, and be ready to apply the brakes if
needed.

Turn Or Bend Example

USING ACC ON HILLS
When driving on hills, ACC may not detect a vehicle
in your lane. Depending on the speed, vehicle load,
traffic conditions, and the steepness of the hills,
ACC performance may be limited.
NOTE:
The driver must maintain control of the vehicle,
r e
main alert, and be ready to apply the brakes if
needed.

ACC Hill Example

4

102 STARTING AND OPERATING
LANE CHANGING
ACC may not detect a vehicle until it is completely
in the lane in which you are traveling. In the
illustration shown, ACC has not yet detected the
vehicle changing lanes and it may not detect the
vehicle until it's too late for the ACC system to take
action. ACC may not detect a vehicle until it is
completely in the lane. There may not be sufficient
distance to the lane-changing vehicle. Always be
attentive and ready to apply the brakes if
necessary.

Lane Changing Example

NARROW VEHICLES
Some narrow vehicles traveling near the outer
edges of the lane or edging into the lane are not
detected until they have moved fully into the lane.
There may not be sufficient distance to the vehicle
ahead.
Narrow Vehicle Example

STATIONARY OBJECTS AND VEHICLES
ACC does not react to stationary objects and
stationary vehicles. For example, ACC will not react
in situations where the vehicle you are following
exits your lane and the vehicle ahead is stopped in
your lane. Always be attentive and ready to apply
the brakes if necessary.

Stationary Object And Stationary Vehicle Example