BMW BMW AG X5 4.4i Automobile User Manual


 
176n
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
or rear
* are triggered if necessary.
390de319
The airbags located under the marked
covers inflate and unfold in a matter of
a few milliseconds. In this process, they
tear through the designed separation
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 ig-
nition and inflation noise. The gas re-
quired to inflate the airbags is not dan-
gerous, and the associated smoke then
dissipates.
The entire process is completed within
fractions of a second.
Adaptive Transmission Control (ATC)
uses a number of factors to calculate
the gear which provides the maximum
efficiency of the automatic transmis-
sion. In this process, the system moni-
tors your personal driving style, the
driving situation, 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.
530us130
Airbags ATC
Online Edition for Part No. 01 41 0 155 303 - © 12/99 BMW AG