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83n
PDC* Dynamic Stability Control (DSC)
The PDC system does not remove
the driver's personal responsibility
for evaluating the distance between the
vehicle and any obstacles. Even when
sensors are involved, there is a blind
spot in which objects cannot be de-
tected. This applies especially in those
cases where the system approaches
the physical constraints of ultrasonic
measurement, as occurs with tow bars
and trailer couplings, and in the vicinity
of thin and painted objects.
Certain sources of sound, such as a
loud radio, could drown out the PDC
signal tone.<
Keep the sensors clean and free
of ice or snow in order to ensure
that they continue to operate effectively.
Do not apply high pressure spray to the
sensors for a prolonged period of time.
Maintain an adequate distance of more
than 4 inches (10 cm).<
The concept
DSC maintains vehicle stability, even in
critical driving situations.
The system optimizes vehicle stability
during acceleration and when starting
from a full stop, as well as optimizing
traction. In addition, the system recog-
nizes unstable vehicle conditions (un-
dersteering or oversteering, for exam-
ple) and helps to keep the vehicle on a
sure course by intervening via the en-
gine and by braking intervention at the
individual wheels.
The system starts up automatically
each time you start the engine.
Indicator lamp
The indicator lamp in the instru-
ment cluster goes out shortly
after you switch on the ignition.
Refer to page 24.
Indicator lamp flashes:
The system is active and governs drive
force and braking force.
If the indicator lamp fails to go out after
the engine is started, or comes on dur-
ing normal driving and stays on:
There is a system malfunction or the
system was deactivated with the but-
ton. You can continue to drive the vehi-
cle normally, but without DSC. Consult
your authorized BMW center to have
the system repaired.
To deactivate the system
Press the button (arrow); the indicator
lamp comes on and stays on.
Traction intervention remains active;
that is, braking intervention will con-
tinue. Refer also to Four-wheel drive on
page 177.
In the following exceptional circum-
stances, it may be effective to deacti-
vate the DSC for a short period:
> when rocking the vehicle or starting
off in deep snow or on loose
surfaces.
> on sandy road surfaces.
> on poor surfaces with deep ruts.
> if the wheels "churn" on muddy
surfaces.
> or when driving with snow chains.
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