Porsche 911 2020 Owner's Manual page 47

Vehicles with large projecting loads
Fig. 9: Vehicles with large projecting loads
In the case of vehicles ahead with long projecting
loads (e.g. a timber transporter), the end of the ve-
hicle may not be detected or may not be detected
correctly by the radar sensor.
Operating principle
Adaptive Cruise Control (ACC) automatically main-
tains a set speed and a set distance at a speed of
approx. 19 mph – 130 mph (30 km/h – 210 km/h)
without having to use the accelerator pedal.
If another vehicle that is traveling slower than the
selected speed is detected ahead in the same lane,
ACC automatically maintains a set distance. Adap-
tive Cruise Control will cause the vehicle to brake if
the distance from the vehicle in front becomes too
small and accelerate if the distance increases.
If the vehicle in front stops, ACC brakes the vehicle
to a stop and then starts it again automatically, pro-
vided the vehicle in front starts driving again within a
limited time window. A driver assistance system
message in the Speed & Assist display on the in-
strument cluster informs the driver that the vehicle
is ready to move off. Otherwise, the driver can re-
sume automatic speed and distance control.
The speed of the vehicle can be increased at any
time by pressing the accelerator pedal. The stored
desired speed and distance settings are retained and
are set again after the accelerator pedal is released.
The speed of the vehicle can be decreased at any
time by braking. This switches the driver assistance
system to passive mode.
Controls
Fig. 10: Control lever for driver assistance systems
R Switch driver assistance systems on/off and open op-
tions menu
S Open options menu (when driver assistance system is
switched on)
1 Set/increase the desired speed
2 Reduce the desired speed
3 RESUME: Resume control, adopt speed
4 CANCEL: Interrupt control
Display elements
All important information, messages and warnings
for Adaptive Cruise Control are displayed in the ACC
main menu on the Speed & Assist display in the in-
strument cluster.
Adaptive Cruise Control (ACC)
Fig. 11: ACC in the Speed & Assist display
A Desired distance from the vehicle ahead
B Status display and desired speed
C Vehicle detected ahead
D Current distance from the vehicle ahead
E Current speed of the vehicle ahead
F Status display and desired speed
When Adaptive Cruise Control (ACC) is switched on,
the status display B appears on the Speed & Assist
display in the instrument cluster.
Status display symbols
Symbol Meaning
ACC is passive.
ACC is passive with set desired
speed.
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
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