Maserati Spyder Owner's Manual page 42

WARNING When cleaning the sensors,
take special care not to scratch or
damage them; therefore, do not use
dry, rough or hard cloths. The sensors
must be washed with clean water,
possibly with car shampoo added. In
car-washes which use steam jet or high
pressure cleaning machines, keep the
2 nozzle at least 10 cm away from the
sensors.
42 Parking sensors (optional)
Sensor range
The sensors allow the system to
monitor the rear of the vehicle; in fact,
their position covers the central and
lateral zones at the rear of the vehicle.
If there is an obstacle located in the
central zone, it will be detected at
distances of less than 1.50 m.
If the obstacle is located in a lateral
position, it will be detected at
distances of less than 0.6 m.