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DRIVER SUPPORT
* Option/accessory.
364
•
signs completely or partly covered with frost,
snow and/or dirt
•
digital road maps
94
are out-of-date, inaccu-
rate or have no speed information
95
.
NOTE
The RSI function may interpret some types of
bicycle rack, connected to the electrical
socket for trailers, as a connected trailer. In
such cases, the driver display may show incor-
rect speed information.
NOTE
This function uses the car's camera and radar
units, which have certain general limitations.
Related information
•
Road Sign Information* (p. 357)
•
Limitations for camera and radar unit
(p. 329)
Driver Alert Control
The Driver Alert Control (DAC) function is
intended to help make the driver aware that he
or she is starting to drive less consistently, e.g. if
the driver 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).
DAC reads the position of the car in the lane.
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.
The car is being driven erratically in the lane.
If driving behaviour becomes
noticeably inconsistent, the
driver is alerted by this symbol
in the driver display, combined
with an acoustic signal and the
text message
Time to take a
break.
If the car is equipped with Sensus Navigation*
and has the function
Rest Stop Guidance acti-
vated, suggestions for an appropriate place for a
break are also displayed.
94
In cars equipped with Sensus Navigation*.
95
Map data with speed information does not exist for all areas.
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