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DRIVER SUPPORT
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* Option/accessory.
241
Road Sign Information (RSI)* -
limitations
The Road Sign Information (RSI
27
) function may
have limitations in certain situations.
The camera sensor for RSI has limitations just
like the human eye. Find out more about this in
the section on the camera sensor limitations
(p. 229)).
Signs which indirectly provide information on a
prevailing speed limit, e.g. name signs for towns/
districts, are not recorded by RSI.
Examples of factors that can reduce RSI are as
follows:
•
Faded signs
•
Signs positioned on bends
•
Rotated or damaged signs
•
Signs positioned high above the roadway
•
Fully/partially obscured or poorly positioned
signs
•
signs completely or partly covered with frost,
snow and/or dirt
•
digital road maps
28
are out-of-date, inaccu-
rate or have no speed information
29
.
Related information
•
Road Sign Information (RSI)* (p. 237)
•
Road Sign Information (RSI)* - operation
(p. 239)
Driver Alert System*
The Driver Alert System is intended to assist dri-
vers whose driving ability is deteriorating or who
are inadvertently leaving the lane they are driving
on.
The Driver Alert System consists of different
functions which can either be switched on at the
same time or individually:
•
Driver Alert Control - DAC (p. 243).
•
Lane Departure Warning - LDW (p. 245).
or
•
Lane Keeping Aid - LKA (p. 249)
A switched-on function is set in standby mode
and is not activated automatically until speed
exceeds 65 km/h (40 mph).
The function is deactivated again when speed
decreases to below 60 km/h (37 mph).
Both functions use a camera which is dependent
on the lane having side markings painted on
each side.
27
Road Sign Information
28
In cars equipped with Sensus Navigation.
29
Map data with speed information does not exist for all areas.
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