Bmw X3 3.0i SAV 2004 Bedienungsanleitung PDF herunterladen (Seite 52)

Technology for comfort, convenience and safety

50

Limits of the system

Even with PDC, final responsibility for

estimating the distance between the

vehicle and any obstructions always

remains with the driver. Even when sensors

are involved, there is a blind spot in which

objects cannot be detected. The system is

also subject to the physical limits that apply

to all forms of ultrasonic measurement,

such as those encountered with tow bars

and trailer couplings, or thin and wedge-

shaped objects etc. Low objects already

displayed, e.g. a curb, can also disappear

from the detection area of the sensors

again before a continuous tone sounds.

Loud sources of sound, inside and outside

the vehicle, could drown out the PDC sig-

nal tone.<

Keep the sensors clean and free of ice

or snow in order to ensure that they

will continue to operate effectively.

Do not apply high pressure spray to the

sensors for a prolonged period of time.

Keep the spray at least 4 in/10 cm away

from the sensors.<

Driving stability control

systems

Your BMW is equipped with an extended

array of systems designed to enhance and

maintain vehicle stability under extreme

conditions. The following section describes

these functions based on ABS, DSC, HDC

and xDrive.

Antilock Brake System ABS

ABS enhances active safety by preventing

the wheels from locking under braking. The

vehicle continues to be steerable during

hard braking.

ABS also includes Electronic brake-force

distribution EBV.

Safe braking, refer to page 77.

Electronic brake-force distribution

EBV

EBV controls the brake system's applica-

tion pressure at the rear wheels to ensure

stable deceleration.

Dynamic Brake Control DBC

The Dynamic Brake Control actively sup-

ports the driver in dangerous braking situa-

tions. Quickly pumping the brake pedal

increases the braking effect with low pedal

pressure so that the shortest possible

braking distance is achieved. This system

exploits all of the benefits provided by ABS.

Do not reduce the pressure on the brake

pedal for the duration of the brake applica-

tion. DBC is deactivated when you release

the brake pedal.

Dynamic Stability Control DSC

The concept

DSC maintains vehicle stability, even in

critical driving situations.

The DSC is operational every time you start

the engine.

The system optimizes the driving stability

during acceleration and when starting from

a standstill. The system recognizes any

tendency for the vehicle to assume an

unstable attitude such as oversteer or

understeer; it then counteracts this ten-

dency with a combination of graduated

reductions in engine torque and selective

braking intervention at individual wheels.

DSC provides optimal stability within the

limits defined by the laws of physics.

The laws of physics cannot be

repealed, even with DSC. An appro-

priate driving style always remains the

responsibility of the driver. Avoid using the

additional safety margin provided by the

system as an excuse for taking unneces-

sary risks.

Do not make any modifications to the DSC

system. Never allow anyone other than

authorized professional technicians to

carry out service or repairs on the system.<

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