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Driver assistance systems
WARNING
Observe the safety warnings
›››
in Con-
trol and warning lamps on page 81.
Introduction
Fig. 251
Instrument panel display: GRA status
indications.
The cruise control system (CCS) is able to
maint
ain the set speed fr
om 20 km/h (
15
mph).
The CSS only r
educes v
ehicl
e speed by
ceasing t
o accelerate, not by actively braking
the vehicle
›››
.
St
at
us displ
ay
GRA st
at
us
›
›
›
Fig. 251
CCS temporarily switched off. The set
speed is displayed in small or darkened
figures.
System error. Contact a specialised
workshop.
CCS switched on. The speed memory is
empty.
The CCS is switched on. The set speed is
displayed in large figures.
Changing gear in CCS mode
The CCS decelerates as soon as the clutch
pedal is pressed, intervening again automati-
cally after a gear is engaged.
Travelling down hills with the CCS
If the CCS cannot maintain a constant vehi-
cle speed downhill, brake and change down
a gear if necessary. The GRA is temporarily
disabled by pressing the brake.
Automatic off
The GRA disconnects automatically or is
temporarily interrupted:
●
If the system detects a fault that could af-
fect the working order of the CCS.
●
If you press and maintain the accelerator
pedal for a certain time, driving faster than
the stored speed.
●
If the dynamic driving control systems inter-
vene, ASR, ESC, etc.
A
B
C
D
●
If the br
ak
e pedal is pr
essed.
●
If the airbag is trigger
ed.
●
If the l
e
v
er is taken out of the D/S position.
WARNING
Use of GRA could cause accidents and se-
vere injuries if it is not possible to drive at a
constant speed maint
aining the safety dis-
tance.
●
Do not use GRA in heavy traffic, if the dis-
tance from the vehicle in front is insuffi-
cient, on steep roads, with several bends or
in slippery circumstances or on flooded
roads.
●
Never use the CCS when driving off-road
or on unpaved roads.
●
Adapt your speed and the distance to the
vehicles ahead in line with visibility, weath-
er, the condition of the road and the traffic
situation.
●
To avoid unexpected operation of the
cruise control system, turn it off every time
you finish using it.
●
It is dangerous to use a set speed which is
too high for other conditions.
●
If driving down a steep gradient, the GRA
cannot maintain a constant speed. The
speed can increase. In this case, brake and
change down a gear.
269
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