2021 CHRYSLER 300 cruise control

STARTING AND OPERATING 93

Cruise Control Buttons

To Activate
Push the on/off button to activate the Cruise
Control. “CRUISE CONTROL READY” will appear in
the instrument cluster display to indicate the
Cruise Control is on. To turn the system off, push
the on/off button a second time. “CRUISE
CONTROL OFF” will appear in the instrument
cluster display to indicate the Cruise Control is off.
The system should be turned off when not in use.
To Set A Desired Speed
Turn the Cruise Control on. When the vehicle has
reached the desired speed, push and release the
SET (+) or SET (-) button. Release the accelerator
and the vehicle will operate at the selected speed.
Once a speed has been set, a message “CRUISE
CONTROL SET TO MPH (km/h)” will appear
indicating the set speed. A cruise indicator lamp,
along with set speed will also appear and stay on
in the instrument cluster when the speed is set.
To Vary The Speed Setting
To Increase Or Decrease The Set Speed
When the Cruise Control is set, you can increase
sp

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 until the button is
released, then the new set speed will be estab -
lished.
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 until the button is
released, then the new set speed will be estab -
lished.
To Accelerate For Passing
Press the accelerator as you would normally. When
the pedal is released, the vehicle will return to the
set speed.
USING CRUISE CONTROL ON HILLS
The transmission may downshift on hills to
maintain the vehicle set speed.
The Cruise Control system maintains speed up and
dow
n hills. A slight speed change on moderate hills
is normal. On steep hills, a greater speed loss or
gain may occur so it may be preferable to drive
without Cruise Control.
1 — On/Off
2 — CANC/Cancel
3 — SET (+)/Accelerate
4 — RES/Resume
5 — SET (-)/Decelerate
WARNING!

Leaving the Cruise Control 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 an accident. Always
leave the system OFF when you are not using it.

4

94 STARTING AND OPERATING
(Continued)
To Resume Speed
To resume a previously set speed, push the RES
button and release. Resume can be used at any
speed above 20 mph (32 km/h).
To Deactivate
A tap on the brake pedal, pushing the CANC button,
or normal brake pressure will deactivate the Cruise
Control system without erasing the set speed from
memory.
The following conditions will also deactivate the
Cr

uise Control without erasing the set speed from
memory:
Vehicle parking brake is applied
Stability event occurs
Gear selector is moved out of DRIVE
Engine overspeed occurs Pushing the on/off button or placing the ignition in
t
h

e OFF position erases the set speed from
memory.
ADAPTIVE CRUISE CONTROL (ACC)
Adaptive Cruise Control (ACC) increases the driving
convenience provided by Cruise Control while
traveling on highways and major roadways.
However, it is not a safety system and not designed
to prevent collisions. The Cruise Control function
performs differently
Ú page 92.
ACC will allow you to keep Cruise Control engaged
i n

light to moderate traffic conditions without the
constant need to reset your Cruise Control. ACC
utilizes a radar sensor and a forward facing
camera designed to detect a vehicle directly ahead
of you.
NOTE:
If the ACC sensor detects a vehicle ahead, ACC
will apply limited braking or acceleration (not to
exceed the original set speed) automatically to
maintain a preset following distance, while
matching the speed of the vehicle ahead.
Any chassis/suspension or tire size modifica -
tions to the vehicle will affect the performance
of
the Adaptive Cruise Control and Forward Colli -
sion Warning systems.
Fixed Speed Cruise Control (ACC not enabled)
will not detect vehicles directly ahead of you.
Always be aware of the feature selected
Ú page 254.
WARNING!
Cruise Control can be dangerous where the
system cannot maintain a constant speed. Your
vehicle could go too fast for the conditions, and
you could lose control and have an accident. Do
not use Cruise Control in heavy traffic or on
roads that are winding, icy, snow-covered or
slippery.
WARNING!
Adaptive Cruise Control (ACC) is a conve -
nience system. It is not a substitute for active
d r
iver involvement. It is always the driver’s
responsibility to be attentive of road, traffic,
and weather conditions, vehicle speed,
distance to the vehicle ahead; and, most
importantly, brake operation to ensure safe
operation of the vehicle under all road condi -
tions. Your complete attention is always
r e

quired while driving to maintain safe control
of your vehicle. Failure to follow these warn -
ings can result in a collision and death or
s e

rious personal injury.
The ACC system:
Does not react to pedestrians, oncoming
vehicles, and stationary objects (e.g., a
stopped vehicle in a traffic jam or a
disabled vehicle).
Cannot take street, traffic, and weather
conditions into account, and may be
limited upon adverse sight distance condi -
tions.

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

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 119
Automatic Transmission
Select the DRIVE range when towing. The
transmission controls include a drive strategy to
avoid frequent shifting when towing. However, if
frequent shifting does occur while in DRIVE, you
can use the AutoStick shift control (if equipped) to
manually select a lower gear.
NOTE:
Using a lower gear while operating the vehicle
u n
der heavy loading conditions will improve perfor -
mance and extend transmission life by reducing
e x

cessive shifting and heat buildup. This action will
also provide better engine braking.
Cruise Control — If Equipped
Do not use on hilly terrain or with heavy loads.
When using the Cruise Control, if you experience
speed drops greater than 10 mph (16 km/h),
d i
sengage until you can get back to cruising
speed.
Use Cruise Control in flat terrain and with light
loads to maximize fuel efficiency.
AutoStick — If Equipped
When using the AutoStick shift control, select
the highest gear that allows for adequate perfor -
mance and avoids frequent downshifts. For
e x

ample, choose “5” if the desired speed can be
maintained. Choose “4” or “3” if needed to
maintain the desired speed.
To prevent excess heat generation, avoid
continuous driving at high RPM. Reduce vehicle
speed as necessary to avoid extended driving at
high RPM. Return to a higher gear or vehicle
speed when grade and road conditions allow.
RECREATIONAL TOWING (BEHIND
MOTORHOME)
Recreational towing (with all four wheels on the
ground, or using a tow dolly) is NOT ALLOWED. The
only acceptable method for towing this vehicle
(behind another vehicle) is on a vehicle trailer with
all four wheels OFF the ground.
DRIVING TIPS
DRIVING ON SLIPPERY SURFACES
Information in this section will aid in safe
controlled launches in adverse conditions.
Acceleration
Rapid acceleration on snow covered, wet, or other
slippery surfaces may cause the driving wheels to
pull erratically to the right or left. This phenomenon
occurs when there is a difference in the surface
traction under the rear (driving) wheels.
Traction
When driving on wet or slushy roads, it is possible
for a wedge of water to build up between the tire
and road surface. This is known as hydroplaning
and may cause partial or complete loss of vehicle
control and stopping ability. To reduce this
possibility, the following precautions should be
observed:
Slow down during rainstorms or when the roads
are slushy.
Slow down if the road has standing water or
puddles.
CAUTION!
Towing this vehicle in violation of the above
requirements can cause severe transmission
and/or transfer case damage. Damage from
improper towing is not covered under the New
Vehicle Limited Warranty.
WARNING!
Rapid acceleration on slippery surfaces is
dangerous. Unequal traction can cause sudden
pulling of the front wheels. You could lose
control of the vehicle and possibly have a
collision. Accelerate slowly and carefully
whenever there is likely to be poor traction (ice,
snow, wet, mud, loose sand, etc.).
4