Bmw 01 41 0 155 307 Bedienungsanleitung PDF herunterladen (Seite 175)

175n

Index Data Technology Repairs Car care Controls Overview

Four-wheel drive Safety belt tensioner

The transmission of power to the four

drive wheels is provided permanently

through a transfer box. The distribution

of torque between the front and rear

axles is 38% to 62%.

Traditional differential locks at the front

and rear axles and in the transfer box

are not required. Their function is

assumed by automatic braking inter-

vention at all four wheels. These trac-

tion interventions are governed by

Automatic Differential Brake (ADB-X), a

sub-function of DSC.

If a wheel tends to slip, it is braked

automatically by ADB-X until it once

again gains traction, and drive force

can be transmitted to that wheel. In

addition, the drive force is distributed to

the remaining wheels during this

530us133

system intervention. Engine output is

also reduced if necessary.

When the DSC is deactivated, the

ADB-X traction intervention is set for

the maximum drive force. However, the

engine intervention and the stability

controls are no longer available. For

this reason, DSC should only be deacti-

vated in the exceptional circumstances

described on page 81.

The BMW 325xi is not an off-road

vehicle. Instead, permanent four-wheel

drive provides a high degree of vehicle

stability and tractive ability under all

road conditions, and will aid you in crit-

ical driving situations, e.g. driving in

extreme winter conditions or on loose

road surfaces.

The safety belt tensioner responds to

severe frontal collisions by tightening

the belts to ensure that occupants

remain firmly positioned in their seats.

A gas-pressure system retracts the

buckle assembly to tension the

shoulder and lap belts within fractions

of a second. This reduces the tendency

to slide under the lap belt.

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