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PSM is switched off after a brief delay.
The light indicator on the button and the PSM
OFF warning light
in the instrument cluster
come on.
A message stating that PSM is deactivated ap-
pears on the instrument cluster.
Information
When braking in the ABS control range, the vehicle is
stabilized even when PSM is switched off. One-sided
spinning of the wheels is prevented even when PSM
is switched off.
However, in exceptional situations it can be advan-
tageous to temporarily switch off PSM:
– On loose ground and deep snow.
– When "rocking the vehicle free".
Information
When PSM Sport mode is active, it is only possible
to switch to PSM OFF mode if the PSM was acti-
vated beforehand.
Switching PSM back on
e Press button .
PSM is immediately active.
The light indicator on the button and the PSM
OFF warning light
on the instrument cluster
go out.
A message stating that PSM is activated appears
on the instrument cluster.
Responding to warning symbols
For information on the PSM warning light:
> Please see chapter "Warning and Information
Messages" on page 293.
ABS brake system
Loss of control over the
WARNING
vehicle
The ABS cannot reduce the risk of accidents due to
inappropriate speed.
The increased safety that is provided should not in-
duce you to take greater risks with your safety. The
laws of physics for driving cannot be overridden even
with ABS.
e Despite the advantages of ABS, drivers remain
responsible for adapting their driving style and
maneuvers to the road and weather conditions
and to the traffic situation.
ABS ensures:
– Full steering control: Vehicle remains steerable
– Good driving stability: No skidding due to locked
wheels
– Optimal braking distance: Shortening of braking
distance in most cases
– Prevention of wheel locking: No flat spots on the
tires
Function
The decisive advantage of ABS lies in the driving
stability and maneuverability of the vehicle in haz-
ardous situations.
ABS prevents the wheels from locking during full
braking on virtually all road surfaces until just before
the vehicles come to a standstill.
ABS begins to take control as soon as one wheel
shows a tendency to lock.
The controlled braking process is comparable to ca-
dence braking in very rapid succession. The driver is
Porsche Stability Management (PSM)
warned to adapt the driving speed to the road con-
ditions by a pulsing brake pedal and a "juddering
noise".
Full braking is necessary:
e Fully depress the brake pedal during the entire
braking operation, despite the pulsing pedal. Do
not reduce the braking pressure.
Responding to warning symbols
For information on the ABS warning light:
> Please see chapter "Warning and Information
Messages" on page 293.
Multi-collision braking
During an accident, multi-collision braking can help
the driver reduce the risk of skidding and further
collisions during the accident through automatically
initiated braking.
Prerequisites
Multi-collision braking works exclusively:
– During front, side, and rear-end collisions.
– When the airbag control unit detects an appro-
priate activation threshold during an accident.
– During an accident at a driving speed above ap-
prox. 6 mph (10 km/h).
Information
The vehicle is decelerated automatically by the PSM
system, provided the hydraulic brake system, PSM,
and electrical system remain undamaged and op-
erational during the accident.
Exceptions
The following activities prevent automatic braking in
the event of an accident:
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
229
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