Maserati QUATTROPORTE Owner's Manual page 224

Driver Assistance Systems
Driver Override
If driver accelerates beyond the set
speed or faster than the car would do
autonomously, the set speed below
the green light will be blinking
and the time gap bars will vanish
to remember that in this condition
the system cannot control the
distance between vehicle and sensed
vehicle ahead. Vehicle speed will be
determined only by the accelerator
pedal position.
Changing Speed Setting
Once speed is set, driver can increase
or decrease it by respectively pressing
multifunction control up (RES +) or
down (SET -). Speed can be increased
or decreased in two ways:
• Pressing control once, set speed will
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increase or decrease by one unit
corresponding to 1 km/h (1 mph).
• Hold the control to increase or
decrease set speed by 10 km/h (5
mph) at a time.
NOTE:
• When pressing the multifunction
control up (RES +) or down (SET -),
the new set speed will be the current
speed of the vehicle.
• When using (SET -) control to
decelerate, if the engine braking
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power does not slow down the
vehicle sufficiently to reach the
set speed, the brake system will
automatically slow down the vehicle.
• The ACC system applies the brake
down to a full stop when following
a target vehicle. If an ACC host
vehicle follows a target vehicle to
a standstill, after two seconds the
system will not be able to resume
driving the car autonomously. As this
point it is necessary the intervention
of the driver on the multifunction
control (press SET- or RES+) or press
the accelerator pedal (see "ACC
Operation Before and During Stop"
in this chapter).
• The ACC system maintains set speed
when driving up hill and down hill.
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.
Temporary Deactivation
A soft tap on the brake pedal, pushing
the multifunction control (CANC), or
normal brake pressure while slowing
the vehicle will temporarily deactivate
the ACC without erasing the set speed
memory. The white light will
appear on the TFT display with below
the set speed.
Conditions for Disabling and
Deactivation
Besides the cases specified in the
previous paragraph, the following
conditions will disable the system:
• Anti-Lock Brake (ABS) kicks in.
• Transmission lever is not in D (Drive).
• The Electronic Stability Control and
the Traction Control System (ESC/TCS)
activate.
• Vehicle parking brake is operated.
• The driver safety belt is unbuckled at
low speed.
• The driver door is ajar at low speed.
• The driver disabled the ESC using
the (ESC Off) button on central
console.
• The road is too steep both uphill and
downhill at low speed.
The system is deactivated and set
speed is deleted from system memory,
if the ACC ON/OFF button is pressed or
if ignition device is turned to OFF.