Maserati GranTurismo Owner's Manual page 317

For the preparation of the mixture of
water and antifreeze and for the control
of the level, proceed as shown in the
"Engine Coolant Level Check" of this
chapter.
Engine Air Filters Replacement
Contact the Service Network to have
the air filters replaced.
A/C Air Filter Replacement
Contact the Service Network to have
the A/C air filter replaced.
Wiper Maintenance and Blades
Replacement
Windshield Wiper Arms Lifting
When the windshield wiper arms are in
rest position it is not possible to check or
replace the blades as they remain under
the engine hood.
To service the blades it is necessary
to move the wiper arms in "Service"
position. To activate this function,
deactivate the windscreen wiper (ring in
position 0) before setting the ignition
device to STOP.
This function can only be activated
within 2 minutes of setting the ignition
device to STOP.
To activate this function, move the lever
upwards (unstable position) for at least
three seconds.
In this way it is possible to lift the arms
for cleaning or replacing the wiper
blades.
If, after using the function, the ignition
device is set back to ON with the blades
in a position other than rest position (at
the base of the windscreen), they will
only return to rest position following a
command given using the stalk (stalk
upwards, into unstable position) or when
a speed of 5 km/h (3 mph) is exceeded.
WARNING!
It is dangerous to operate or service
the wiper blades with the windshield
wipers in an active position (any
position different from "0") and with the
ignition device in the ON position. The
rain sensors may suddenly activate
the wipers. Always use the "Service"
Maintenance and Care
position for any intervention on the
windshield wiper blades.
CAUTION!
Do not operate the wipers with the blade
lifted from the glasses.
Windshield Wiper Maintenance
Life expectancy of wiper blades varies
depending on the geographical area's
weather conditions where the car
is used and frequency of use. Poor
performance of blades may be present
with chattering, marks on the glass,
water lines or wet spots. If any of these
conditions are present, clean the wiper
blades or replace if necessary.
Clean the rubber edges of the wiper
blades and the windshield/rear window
glasses periodically with a sponge
or soft cloth and a mild nonabrasive
cleaner. This will remove accumulations
of salt or road film.
Operation of the wipers on dry glass for
long periods may cause deterioration of
the wiper blades.
Always use washer fluid when using the
wipers to remove salt or dirt from a dry
windshield.
Avoid using the wiper blades to remove
frost or ice from the windshield. Keep
the blade rubber out of contact with
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