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DRIVER SUPPORT
Limitations of Road Sign
Information*
The Road Sign Information Road Sign
Information - RSI function may have limitations in
certain situations.
Examples of things that can reduce the RSI func-
tion 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
•
21
digital road maps
are out-of-date, inaccu-
rate or have no speed information
NOTE
The RSI function can interpret some types of
bicycle rack (connected to the electrical
socket for trailers) as a connected trailer. In
such cases the driver may be shown incorrect
speed information.
21
In cars equipped with Sensus Navigation.
Map data with speed information is not available in all markets.
22
352
NOTE
The function uses the car's camera unit,
which has some general limitations, see the
"Limitations for camera unit" section.
Related information
•
Road Sign Information* (p. 348)
•
Activating/deactivating Road Sign Informa-
tion (p. 351)
•
Sign display with Road Sign Information
(p. 348)
•
Limitations of the camera unit (p. 327)
22
.
Driver Alert Control
The Driver Alert Control function is intended to
attract the driver's attention when he/she starts
to drive less consistently, e.g. if he/she becomes
distracted or starts to fall asleep.
The objective for DAC is to detect slowly deterio-
rating driving ability and it is primarily intended for
major roads. The function is not intended for city
traffic.
The function is activated when speed exceeds
65 km/h (40 mph) and remains active as long as
the speed is over 60 km/h (37 mph).
A camera detects the edge markings painted on
the carriageway and compares the alignment of
the road with the driver's steering wheel move-
ments.
* Option/accessory.
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