Alfa Romeo 4C (2018 year). Manual — part 34
To Decrease Speed
When the Speed Control is set, you can decrease speed
by tapping the speed control lever down (-).
The speed decrement shown is dependant on the speed
of U.S. (mph) or Metric (km/h) units:
U.S. Speed (mph)
•
Tapping the speed control lever down (-) once will
result in a one mph decrease in set speed. Each
subsequent tap of the lever results in a decrease of
one mph.
•
If the lever is continually held down, the set speed
will continue to decrease until the lever is released,
then the new set speed will be established.
Metric Speed (km/h)
•
Tapping the speed control lever down (-) once will
result in a two km/h decrease in set speed. Each
subsequent tap of the lever results in a decrease of
two km/h.
•
If the lever is continually held down, the set speed
will continue to decrease until the lever is released,
then the new set speed will be established.
To Accelerate For Passing
Press the accelerator as you would normally. When the
pedal is released, the vehicle will return to the set speed.
To Resume Speed
To resume a previously set speed, push the RESUME
button, located on the end of the speed control stalk,
and release. Resume can be used at any speed above
18 mph (30 km/h).
To Deactivate
A soft tap on the brake pedal, pushing the CANCEL/
RESUME button on the end of the stalk, or normal
brake pressure while slowing the vehicle will deactivate
the
Speed
Control
without
erasing
the
set
speed
memory. Rotating the end of the multifunction lever to
the O (off) position, or turning the ignition switch to
OFF, erases the set speed memory.
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145
PARKING SENSORS — IF EQUIPPED
The vehicle’s parking sensors are located in the rear
bumper, and will detect the presence of any obstacles
near the rear part of the vehicle while moving in
REVERSE gear. The driver is then informed through an
intermittent acoustic signal.
Acoustic Signal
When REVERSE gear is engaged, and there is an
obstacle behind the vehicle, an acoustic signal is emitted
which varies according to the distance of the bumper
from the obstacle.
The frequency of the acoustic signal:
•
Increases as the distance between vehicle and ob-
stacle decreases, culminating in a continuous acous-
tic signal when the distance is less than approxi-
mately 12 inches (30 cm).
•
Decreases if the distance from the obstacle increases,
until the signal ceases entirely.
•
Remains constant if the distance between vehicle and
obstacle remains unchanged; if this situation con-
cerns the side sensors, the signal will stop after
approximately 3 seconds, for example, in the event of
manoeuvres along a wall.
If several obstacles are detected by the sensors, only the
nearest one is considered.
Parking Sensors
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Indications On Display — If Equipped
When the sensors are activated, the parking sensor
display screen appears in the instrument cluster.
Obstacle presence and distance information is therefore
provided both by the acoustic signal and the instrument
cluster display.
The system indicates a detected obstacle by displaying
an arc in one or more positions according to the distance
of the obstacle and its position in relation to the vehicle.
If an obstacle is detected in the rear central area, the
instrument cluster display shows all the arcs in the rear
central area, up to the one that corresponds to the
position of the obstacle itself.
The signal is similar for obstacles in the rear left or right
area.
The arc that corresponds to the position of the obstacle
will flash.
The color on the instrument cluster display depends on
the distance from and position of the obstacle.
The vehicle is close to the obstacle when the instrument
cluster display shows a single constant arc and emits a
continuous sound.
If there are several obstacles, the closest one is indi-
cated.
Activation/Deactivation
The sensors are automatically activated when REVERSE
gear is engaged. As the obstacle behind the vehicle gets
closer, the acoustic signal becomes more frequent.
Parking Sensor Display Screen
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147
Fault Indication
Parking sensor failures, if any, will be indicated when
REVERSE gear is engaged by the switching on of the
warning light in the instrument cluster display.
General Warnings
When parking, take the utmost care over obstacles that
may be above or under the sensor.
Under certain circumstances, objects close to the vehicle
are not detected by the system and could therefore
cause damage to the vehicle or be damaged themselves.
Some conditions may influence the performance of the
parking sensors:
•
The presence of ice, snow, mud or multiple layers of
paint
on
the
sensor
surface
may
cause
reduced
sensitivity of the sensor itself and therefore reduce
the system performance.
•
Mechanical interference (e.g washing the vehicle,
rain, strong wind, hail) may cause the sensor to
detect a non-existent obstacle (“echo interference”).
•
The presence of ultrasonic systems (e.g. pneumatic
brake systems of trucks or pneumatic drills) near the
vehicle could alter the signals sent by the sensor.
•
The variation in sensor position, caused by variation
in ride (due to suspension component wear), chang-
ing tires, overloaded vehicle, or tuning that lowers
the vehicle, for example, may affect parking sensor
system performance.
NOTE:
The sensor must be free from mud, dirt snow or
ice in order for the system to operate correctly. Be
careful not to scratch or damage the sensors while
cleaning them. Avoid using dry, rough or hard cloths.
The sensors must be washed using clean water, with the
addition of car shampoo if necessary. When using
special washing equipment such as high pressure jets or
steam cleaning, clean the sensors very quickly keeping
the jet more than 4 inches (10 cm) away. Also, do not
apply stickers to the sensors.
WARNING!
Drivers must be careful when backing up even
when using the Parking Sensor system. Always
check carefully behind your vehicle, and be sure to
check for pedestrians, animals, other vehicles, ob-
structions, or blind spots before backing up. You
are responsible for the safety of your surroundings
(Continued)
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