Volvo 2006 C70 - Manual (Page 44)

B - Rain sensor (option)
The rain sensor automatically regulates windshield wiper speed according to the amount of water on the windshield.
The sensitivity of the rain sensor is adjusted by moving the thumb wheel (C in the illustration on the previous page) up
(the wipers will sweep the windshield more frequently) or down (the wipers will sweep the windshield less frequently).
On/Off
To activate the rain sensor:
1. Switch on the ignition.
2. Put the windshield wiper lever in position 0.
3. Press button B (see the illustration on the previous page). The rain sensor symbol will appear in the lower display.
The rain sensor can be deactivated by:
Pressing button (B) with the ignition on. or
Moving the windshield wiper lever down. If the lever is moved up, the rain sensor function will remain activated.
CAUTION!
The rain sensor should be deactivated when washing the car in an automatic car wash, etc. If the rain sensor function
is left on, the wipers will start inadvertently in the car wash and could be damaged.
The rain sensor is automatically deactivated:
When the key is removed from the ignition.
Five minutes after the ignition is switched off if the key is left in the ignition.
C - Thumb wheel
The thumb wheel is used to set the wiper interval when intermittent wiping is selected, or the sensitivity to the amount
of rain on the windshield when the rain sensor is selected. Move the wheel upward or downward to increase/decrease
wiper speed when the intermittent function is selected, or to increase/decrease the optional rain sensor's sensitivity
when the this function is activated.
pg. 46 Instruments and controls
Steering wheel adjustment, Hazard warning flashers