Light and Rain Sensor
Details & Technology
Installation of a combined rain/light sensor in the base of the interior mirror. Depending on
the light switch position, the low-beam headlamps are switched on when it gets dark, when
the vehicle enters a tunnel, or when rain or snow are falling. The light sensor continuously
compares the ambient light level outside the vehicle with a set value and, when appropriate,
automatically switches the headlamps on and off.
Depending on the position of the windscreen wiper combination stalk, the windscreen wipers
too are automatically activated when conditions require.
The sensor aims an infra-red light beam at the windscreen at a defined angle. The intensity
with which the light is reflected back varies according to how wet the windscreen is. Based
on the amount of reflected light, the system adjusts the wiper interval to anything from a
single wipe to continuous wiping.
The sensing zone is heated to prevent icing and condensation.
Benefits & Arguments
• Automatically controlled optimal wiping interval
• Low-beam headlamps switched on and off automatically
Stress-free driving is ensured at all times, even in poor weather, since the driver does not
have to adjust the wiping interval manually. If only isolated drops are falling, wiping is not
triggered prematurely. The ideal wiping interval is ensured under all weather conditions.
The headlamps are switched on and off automatically in response to changes in the ambient
light level outside the vehicle.
©2015 Mercedes-Benz USA, LLC / Daimler Vans USA, LLC
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