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Operation
●
In some situation
s, the system may incor-
rectly interpret an intended driving manoeu-
vre as driver tiredness.
●
No warning is given in the event of the ef-
fect called microsleep!
●
Please observe the indications on the in-
strument panel and act as is necessary.
Note
●
F
atigue detection h
as been developed for
driving on motorways and well paved roads
only.
●
If there is a fault in the system, have it
checked by a specialised workshop.
Function and operation
Fig. 163 On the instrument panel display: fa-
tigue det
ection symbo
l
.
Fatigue detection determines the driving be-
h
av
iour of
the driver when starting a journey,
making a calculation of tiredness. This is
constantly compared with the current driving
behaviour. If the system detects that the driv-
er is tired, an audible warning is given with a
sound and an optic warning is shown with a
symbol and complementary message on the
instrument panel display ››› Fig. 163. The
message on the instrument panel display is
shown for approximately 5 seconds, and de-
pending on the case, is repeated. The system
stores the last message displayed.
The message on the instrument panel display
can be switched off by pressing the
button on the windscreen wiper lever or the
b
utt
on
on the multi function steering
wheel
›
›
›
page 25.
The message can be recalled to the instru-
ment panel display using the multifunction
display ›››
page 25.
Conditions of operation
Driving behaviour is only calculated on
speeds above about 65 km/h (40 mph) up to
around 200 km/h (125 mph).
Switching on and off
Fatigue detection can be activated or deacti-
vated in the Easy Connect system with the
button
and the function button
››› page 99. A mark indicates that the adjust-
ment
has been activated.
System limitations
The Fatigue detection h
as certain limitations
inherent to the system. The following condi-
tions can limit the Fatigue detection or pre-
vent it from functioning.
●
At speeds below 65 km/h (40 mph)
●
At speeds above 200 km/h (125 mph)
●
When cornering
●
On roads in poor condition
●
In unfavourable weather conditions
●
When a sporty driving style is employed
●
In the event of a serious distraction to the
driver
Fatigue detection will be restored when the
vehicle is stopped for more than 15 minutes,
when the ignition is switched off or when the
driver has unbuckled their seat belt and
opened the door.
In the event of slow driving during a long pe-
riod of time (below 65 km/h, 40 mph) the
system automatically re-establishes the tired-
ness calculation. When driving at a faster
speed the driving behaviour will be recalcula-
ted.
172
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