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Driving stability control systems, Stability, Technology for driving comfort and safety – BMW Z4 sDrive35i 2010 User Manual

Page 80

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Technology for driving comfort and safety

78

Loud sound sources outside or inside the car
can drown out the PDC signal. Therefore,
always drive cautiously; otherwise, there is a
risk of personal injury or property damage.

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Driving stability control

systems

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

Antilock Brake System ABS

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

114

.

Electronic brake-force distribution

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

Dynamic Brake Control DBC

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 full braking application.

Dynamic Stability Control DSC

DSC prevents the driving wheels from losing
traction when you pull away from rest or accel-
erate. The system 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 indi-
vidual 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The laws of physics cannot be repealed,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, as this could
result in an accident.

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Deactivating/activating the DSC OFF

program

The program can be deactivated via Dynamic
Driving Control, refer to DSC OFF.

For better control

The indicator lamp flashes: DSC con-
trols the drive forces and brake forces.
The indicator lamp lights up: DSC has

failed.

DTC Dynamic Traction Control

The concept

The DTC system and the TRACTION program
are a variant of the DSC in which forward
momentum is optimized.
The system ensures maximum forward
momentum on special road conditions, e.g.,
unplowed snowy roads, but driving stability is
limited.
It is therefore necessary to drive with appropri-
ate caution.
You may find it useful to briefly activate DTC
under the following special circumstances:

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When driving in slush or on uncleared,
snow-covered roads.

>

When rocking the vehicle or driving off in
deep snow or on loose surfaces.

>

When driving with snow chains.

Deactivating/activating DTC Dynamic

Traction Control

The system and program can be deactivated/
activated via Dynamic Driving Control.

Online Edition for Part no. 01 41 2 602 883 - © 08/09 BMW AG

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