BMW E87 2009 Owner's Handbook Manual page 78

Malfunction
The warning lights come on. Active
steering is malfunctioning or tempo-
rarily deactivated. At low speeds
greater steering wheel movements
are necessary, at high speeds the car reacts
more sensitively to steering wheel movements.
The stabilising intervention function may also
be deactivated. Drive cautiously and think well
ahead.
Deactivation
Active steering disables itself to run an initiali-
sation. This deactivation is indicated by a mes-
sage on the Control Display. The initialisation
can take a number of minutes.
If the message does not disappear during your
current journey, have the system checked.
Defect
In the event of a defect, a corresponding text
message is displayed. Have the system
checked.
Servotronic*
The principle
The Servotronic varies the steering force
required to turn the wheels, depending on the
speed at which you are driving.
At low speeds, steering power is boosted
strongly, i.e. less effort is required for steering.
Power assistance for the steering diminishes as
road speed increases.
The system works automatically.
Malfunctions
Malfunctions are indicated via Check Control,
see page 67.
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Two-stage brake lights*
On the left: normal braking.
On the right: sharp braking.