BMW 840Ci, Руководство пользователя

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Controls
Operation
Maintenance
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The system is in operation whenever
the engine has been started.
The telltale light in the instrument
cluster goes out after the engine has
been started.
To switch off the system:
Press the button; the telltale light will
come on.
To re-activate the system:
Press the button again; the telltale
light will go out.
Telltale light
If the telltale light flashes:
The system is active, that is to say it is
compensating for fluctuations in trac-
tion caused by road conditions.
If the telltale light does not go out
after the engine has been started or
comes on during the journey:
The system is defective, but the car
can still be driven normally with DSC
out of action. Take the car to BMW
Service to have the fault repaired.
Operating principle
Highly-sensitive sensors monitor
wheel rotating speeds and the steer-
ing lock angle. If wheel speeds vary or
differ from the calculated value at a
given steering lock angle, the system
registers the likelihood of wheelspin
and reduces engine output accord-
ingly; if necessary, either driven wheel
can be braked momentarily to prevent
it from spinning.
Although the action of this system
may seem to be restricting available
engine power and therefore be diffi-
cult for the driver to accept, it should
be remembered that as much traction
as can be achieved, and therefore
optimum acceleration, are always
available for the prevailing road,
driving and climatic conditions, with-
out exceeding the limits of dynamic
stability.
When the system is functioning and
the brakes are being applied, a certain
amount of noise is generated.
a
Even with DSC, the basic laws
of physics continue to apply. If the
maximum possible speed in any given
situation is exceeded, traction and lat-
eral wheel location may be lacking.
The driver alone is responsible for
avoiding this situation. The additional
safety potential offered by this system
must never be understood as an invi-
tation to take additional risks.
c
The system reacts sensitively if tyres
of different makes and types are used
on the same car. You should therefore
ensure that all the car's tyres are iden-
tical in make, type and tread pattern.
By switching off DSC it is possible to
revert to the conventional driveline
(without electronic control). It may be
desirable to switch off the system to
ensure maximum potential traction
1 If the car has to be rocked out of a
hollow or started in deep snow or
on a loose surface.
2 if snow chains are fitted.
DSC
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