Driving stability control systems, Control, Technology for driving comfort and safety – BMW 325xi Sports Wagon 2006 User Manual

Page 68

Technology for driving comfort and safety

thin and wedge-shaped objects, etc. Low
objects already indicated, such as a curb, may
enter the sensors' dead areas before a continu-
ous audible signal is given. Higher, protruding
objects, such as ledges, may not be detectable.
Loud sound sources outside or inside the car
can drown out the PDC signal.

Driving stability control

systems

Your BMW has a number of systems that help
to maintain the vehicle's stability even in
adverse driving conditions.

ABS Antilock Brake System

ABS prevents locking of the wheels during
braking. Safe steering response is maintained
even during full braking. Active safety is thus
increased.
The ABS is operational every time you start the
engine. Braking safely, refer to page

Electronic brake-force distribution

The system controls the brake pressure in the
rear wheels to ensure stable braking behavior.

DBC Dynamic Brake Control

When you apply the brakes rapidly, this system
automatically produces the maximum braking
force boost and thus helps to achieve the short-
est possible braking distance during full brak-
ing. This system exploits all of the benefits pro-
vided by ABS.
Do not reduce the pressure on the brake for the
duration of the brake application. If the brake is
released, DBC will be switched off.

DSC Dynamic Stability Control

DSC prevents the driving wheels from losing
traction when you pull away from rest or accel-
erate. DSC also recognizes unstable driving
conditions, for example if the rear of the car is
about to swerve or if momentum is acting at an
angle past the front wheels. In these cases,
DSC helps the vehicle maintain a safe course

within physical limits by reducing engine output
and through braking actions at the individual
wheels.

The laws of physics cannot be repealed,
even with DSC. An appropriate driving

style always remains the responsibility of the
driver. Therefore, do not reduce the additional
safety margin again by taking risks.

Deactivating DSC

Press the button for at least 3 seconds; the indi-
cator lamps for DSC in the instrument cluster
light up. Dynamic Traction Control DTC and
DSC have been simultaneously deactivated.
Stabilizing and drive-output promoting actions
are no longer executed.
To increase vehicle stability, activate DSC again
as soon as possible.

Activating DSC

Press the button again; the indicator lamps in
the instrument cluster go out.

To control

If the indicator lamp flashes:
DSC controls the drive forces and
brake forces.
If the indicator lamps are on:
DSC has been completely deacti-
vated.

DTC Dynamic Traction Control

DTC is a version of DSC in which the drive out-
put is optimized for particular road conditions,
e.g. unplowed snow-covered roads. The sys-
tem assures the maximal drive output, but with