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Operation
mph) for the system to return to conditions in
which the engine c
an be stopped.
Manually switching on/off the Start-
Stop sys
tem
Fig. 184 Centre console: Start-Stop system
b
utt
on.
If you do not wish to use the system, you can
sw
it
c
h it off manually.
–
To manually switch on/off the Start-Stop
system, press the button. The button
symbol remains lit up yellow when the sys-
tem is switched off.
Note
The system is automatically switched on each
time the engine is
deliberately stopped dur-
ing a stopping phase. The engine will start
automatically.
Driver messages on the instrument
p
anel
di
splay
Start-Stop system deactivated.
Start the engine manually
This driv
er message is displayed when cer-
tain conditions are not met during the stop-
ping phase and the Start-Stop system cannot
restart the engine. The engine must be star-
ted manually.
Start-Stop system: Fault! Func-
tion not available
There is a fault in the Start-Stop system. Take
the vehicle to a workshop to have the fault
repaired.
Hill Descent Control (HDC)
Des
cription and operation
3 Valid for vehicles: 4Drive
Hi
ll Descent Control limits the speed on steep
descents by automatically braking all four
wheels, both when moving forward and in re-
verse. As the anti-lock brake system remains
active, it prevents the wheels from locking. In
vehicles with manual transmission, the Hill
Descent Control adapts the theoretical speed
without slowing the engine below its idling
speed.
After starting the descent of a slope below
30 km/h (18 mph), speed is
limited to a min-
imum of 2 km/h (1 mph) and a maximum of
30 km/h (18 mph). When appropriate, the
driver may increase or decrease the speed
within the limit by pressing the accelerator or
the brake. At this point the function is inter-
rupted and, if necessary, it is then reactiva-
ted.
Even so, it is imperative that the surface
guarantees sufficient adhesion. For this rea-
son, the Hill Descent Control will not fulfil its
function when, for example, descending a
slope with a frozen or slippery surface.
Hill Descent Control is available when the
dash panel display shows the message .
Hill Descent Control automatically intervenes
if the following conditions are met:
●
The vehicle engine is running.
●
The Offroad driving profile has been selec-
ted ››› page 242. Driving at a speed below 30
km/h (18 mph) (the message is shown on
the dash panel display).
●
The slope of the descent is at least 10%
when driving forward and 9% when driving in
reverse.
●
The brake and the accelerator are not
pressed.
Hill Descent Control is deactivated on press-
ing the brake and the accelerator or if the
slope is below 5%. The function may be
210
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