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Function of the light sensor
In order to detect certain ambient conditions, such
as tree-lined avenues or routes through tunnels, the
light sensor registers the light intensity in two
areas.
The global field describes the direct brightness on
the vehicle, while the fore-field describes the
lighting conditions in the section of road lying
ahead of the vehicle. This is activated using the
"Auto" setting on the rotary light switch.
Tasks of the rain sensor
The following functions are implemented,
depending on the amount of water on the
windscreen:
– Switch the wiper on and off automatically at
seven different speeds
– Activate the driving light when it is raining
Activation
The rain sensor is activated by positioning the wiper
stalk to the "Intermittent" setting. The driver can
then set four sensitivity ranges using the regulator
for windscreen wiper intermittent operation.
A reference wiper function (wiper action when the
rain/light sensor is activated) is no longer necessary
with this system. This means that the wiper stalk
can always remain at the "Intermittent" setting.
For safety reasons, however, the rain sensor
operation is only activated in this case when a
driving speed of more than 16 km/h is reached, or
when the sensitivity on the regulator for windscreen
wiper intermittent operation is changed.
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326_091
Global field
Fore-field
Note
Manually switched wiper intervals have
priority
Light sensor
Rain sensor
photodiode is
also used
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