BMW M3 2001 Bedienungshandbuch PDF herunterladen (Seite 172)

172n

Rain sensor*

Depending on the amount of moisture

on the windshield, the rain sensor

controls the operation of the windshield

wipers.

Infrared light is carried along the

surface of the windshield in an optical

conductor in such a manner that it is

reflected completely when the wind-

shield is dry. The quantity of reflected

light is measured.

If there is moisture on the glass, the

amount of light reflected is reduced

since the infrared light at the surface of

the windshield can escape. The quan-

tity of reflected light is thus a means of

gauging the amount of moisture on the

windshield.

When the system is set to the "intermit-

tent" wiper speed, the wipers react

immediately – if water is splashed onto

the windshield by vehicles traveling

ahead of you, for example. As a result,

the rain sensor makes a contribution to

driving safety and comfort.

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BMW M3 2001 Bedienungshandbuch Seite 172