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DRIVER SUPPORT
* Option/accessory, for more information, see Introduction.
250
Road sign information (RSI)* -
limitations
The road sign information function (RSI – Road
Sign Information) helps the driver to remember
which speed-related road signs the car has
passed. The function has the following limita-
tions.
The RSI function's camera sensor has limitations
just like the human eye - read more about cam-
era sensor limitations (p. 238)).
Signs which indirectly provide information on a
prevailing speed limit, e.g. name signs for towns/
districts, are not recorded by the RSI function.
Here are several examples of what can disrupt
the function:
•
Faded signs
•
Signs positioned on bends
•
Rotated or damaged signs
•
Concealed or poorly positioned signs
•
Signs completely or partly covered with frost,
snow and/or dirt.
Related information
•
Road Sign Information (RSI)* (p. 246)
•
Road sign information (RSI)* - operation
(p. 247)
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. 251).
•
Lane Departure Warning - LDW (p. 254).
or
•
Lane Keeping Aid - LKA (p. 258)
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.
WARNING
Driver Alert System does not work in all situa-
tions but is designed merely as a supplemen-
tary aid.
The driver always bears ultimate responsibility
for ensuring that the vehicle is driven safely.
Related information
•
Driver Alert Control (DAC)* (p. 251)
•
Lane Departure Warning (LDW)* (p. 254)
•
Lane Keeping Aid (LKA)* (p. 258)
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