Automatic On And Off; Twilight Sensor - Maserati Quattroporte Automatic 2009 Owner's Manual

M139_UM_usa1.book Page 129 Monday, September 1, 2008 2:39 PM

Automatic on and off

When the light switch A is turned to
AUTO and the ignition key is in the
MAR (ON) position, the position lights,
side marker, low beam lights and
license plate lights turn on and off
according to the light outside.
WARNING: The high beams can only be
switched on manually by pushing the
left-hand lever forward.
If the high beams are
activated, they will come on
automatically every time the
lights are switched on. We recommend
therefore that you switch them off
every time the twilight sensor
deactivates the external lights.
In case of fog during the day,
the position lights and low
beams will not be turned on
automatically. The driver must always
be ready to turn the lights on
manually, including the front and rear
fog lights.
WARNING: After the external lights
have switched on automatically, the
front and rear fog lights can always be
turned on manually. When the
external lights are switched off
automatically, the front and rear fog
lights are also switched off (if active)
and the next time the external lights
are switched on automatically, only the
front fog lights will come on.
Therefore, the user will have to switch
the rear fog lights on manually if these
are required.
The responsibility for
switching on the lights,
depending on the daylight
and the local regulations in force,
always lies with the driver. The
automatic system for switching on
and off the external lights is to be
considered as an aid for the driver. If
necessary, switch the lights on and off
manually.

Twilight sensor

The twilight sensor is composed of two
sensors: a global sensor, which
measures the brightness upwards, and
a directional one, which measures the
brightness in the vehicle's travelling
direction, so as to recognize tunnels,
etc.
If the sensor should fail, the system will
turn on the low beams and the side
lights, regardless of the brightness of
light outside, and the failure message
will appear on the instrument panel
display.
The failure indication will be displayed
so long as the switch A is turned to
AUTO.
In this case, we recommend that you
switch off the automatic operation for
the external lights and switch them on
manually if necessary; contact your
local Authorized Maserati Dealer as
soon as possible.
External lights and direction indicators
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