Maserati GRANCABRIO Owner's Manual page 55

Sensor range
The sensors allow the system to
monitor the front and rear of the
vehicle; they are positioned so as to
monitor the central and lateral zones
at the front and at the rear of the
vehicle.
In the event of an obstacle located
in a central area, it will be detected
at distances of less than 0,9 m (1 yd)
at the front and 1,5 m (1.6 yd) at
the rear, depending on the type of
obstacle and its dimensions.
If the obstacle is located in a lateral
position, it will be detected at
distances of less than 0,8 m (0.9 yd).
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