BMW 528I User Manual download pdf (Page 188)

188n

Deceleration sensors continuously

monitor the physical forces acting upon

the vehicle. If, as the result of a frontal

collision, vehicle deceleration is

reached at which the protection of the

safety belts alone is no longer ade-

quate, the gas generators of the driver-

side and passenger-side airbags are ig-

nited simultaneously. However, the

passenger-side airbag is only triggered

if an additional sensor has recognized

that the passenger seat is occupied.

In the event of a side collision, the head

protection and side airbags in the front

and rear

* are triggered if necessary.

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The airbags located under the marked

covers inflate and unfold in a matter of a

few milliseconds. In this process they

tear through the rated breaking points

of the upholstered covers or press them

out.

Because the inflation process must be

virtually instantaneous, it is necessarily

accompanied by a certain amount of

ignition and inflation noise. The gas

which the system employs to inflate the

airbag is not dangerous. Smoke

appears as the gas dissipates.

The entire process is completed within

fractions of a second.

On vehicles with automatic transmis-

sion, Adaptive Transmission Control

(ATC) uses a number of factors to cal-

culate the gear which provides the

maximum efficiency. In this process it

monitors your personal driving style, the

situation in which you are driving, the

condition of the road and the traffic

conditions.

ATC recognizes your personal driving

style from the positions and movements

of the accelerator pedal, deceleration

when braking and lateral acceleration

through curves. Four different shift

characteristics – from comfort-oriented

to performance-oriented – are available

for selection by ATC.

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ATC

Airbags ATC*

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