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– When the speed limit is reduced to be-
low the vehicle speed while driving, a
signal sounds after approx. 30 seconds.
– When the speed limit is intentionally
exceeded by stepping on the accelerator
pedal all the way down, there is no sig-
nal.
Displays in the instrument cluster
Instrument cluster without enhanced
features:
The desired speed is displayed under
the LIMIT indicator.
Instrument cluster with en-
hanced features:
The desired speed is displayed
under the LIM indicator.
– The indicator does not light up: the sys-
tem is switched off.
– The indicator lights up green: the sys-
tem is active.
– Display flashes green: set speed limit ex-
ceeded.
Displays in the Head-up Display
The information from the Speed Limiter can
also be displayed in the Head-up Display.
Fatigue alert
Concept
The system can detect decreasing alertness
or fatigue of the driver during long, monoto-
nous trips, for instance on highways. In this
situation, it is recommended that the driver
takes a break.
Safety information
Warning
The system cannot serve as a substitute
for the driver’s personal judgment in as-
sessing one's physical state. An increasing
lack of alertness or fatigue may not be de-
tected or not be detected in time. There is
a risk of accident. Make sure that the
driver is rested and alert. Adjust driving
style to traffic conditions.
Function
The system is switched on each time the en-
gine is started and cannot be switched off.
After travel has begun, the system monitors
certain aspects of the driver's behavior, so
that decreasing alertness or fatigue can be
detected.
This procedure takes the following criteria
into account:
– Personal driving style, for instance
steering behavior.
– Driving conditions, for instance time,
length of trip.
Starting at approximately 43 mph/70 km/h,
the system is active and can display a rec-
ommendation to take a break.
Break recommendation
If the driver becomes less alert or fatigued,
a message is displayed in the Control Dis-
play with the recommendation to take a
break.
A recommendation to take a break is dis-
played only once during an uninterrupted
trip.
After a break, another recommendation to
take a break cannot be displayed until after
approximately 45 minutes.
Seite 188
CONTROLS Safety
188
Online Edition for Part no. 01405A2C458 - II/21
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