The rain sensor is behind the driving mirror in contact with the windscreen and has the purpose of automatically adjust, during the intermittent operation, the frequency of the windscreen wiper strokes as to the rain intensity.
The sensor has a range of adjustment that gradually varies between wiper stationary (no wiping) when the windscreen is dry, to wiper at first continuous speed (continuous slow) with heavy rain.
See also:
Headlights
ADJUSTING THE HEADLIGHT BEAM
The correct positioning of the headlight beams is very important for the comfort
and safety, not only of the person driving the vehicle but also all other road users.
...
Engine Break-In Recommendations
A long break-in period is not required for the engine and drivetrain (transmission
and axle) in your vehicle.
Drive moderately during the first 300 miles (500 km).
After the initial 60 miles (100 ...
General warnings
WARNING
If the warning light does not
turn on when turning the ignition key to MAR or if it stays on when travelling,
this could indicate a failure in safety retaining systems; under this condit ...