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Start and driving
WARNING
Please note that if the road surface is slip-
pery or w
et, the kick-down feature could
cause the driving wheels to spin, which
could result in skidding.
CAUTION
●
If you st
op the vehicle on a gradient, do
not attempt to stop it from rolling by de-
pressing the accelerator when a gear has
been selected. This could cause overheat-
ing and damage the automatic gearbox.
●
If you allow the vehicle to roll with the
lever in position N and the engine off, the
automatic gearbox will be damaged by
lack of lubrication.
●
In certain driving situations or traffic con-
ditions, the gears could overheat and be
damaged! If the warning lamp lights up,
stop the vehicle as soon as you can and
wait for the gearbox to cool
›››
page 202.
●
If the gearbox operates with the backup
programme, take the vehicle to a special-
ised workshop and have the fault repaired
without delay.
downhill assistant
Downhill speed control is activated when the
l
ever is in the D/S position and the brake is
applied. An appropriate lower gear is engag-
ed.
The assistant attempts to maintain the speed
at which the vehicle was travelling when the
brake was applied, within logical limits. It may
be necessary to correct the speed by press-
ing the brake.
The assistant can only change down as far
as 3rd gear. It is possible that on very steep
slopes you have to switch to tiptronic mode
and change down to 2nd or 1st gear to take
advantage of engine braking and take the
load off the brake system.
Downhill speed control is deactivated as
soon as the road levels out again or you press
the accelerator pedal.
On vehicles with a cruise control system
›››
page 212, downhill speed control is acti-
vated when you set a cruising speed.
WARNING
The downhill speed control cannot defy the
l
aws of physics. Therefore, speed cannot
be maintained constant in all situations. Al-
ways be prepared to use the brakes!
Inertia mode
The inertia mode allows you to travel certain
dist
ances without using the accelerator,
which saves fuel. Plan ahead and use the in-
ertia mode to “let” the vehicle “roll”.
Activation of the inertia mode
Condition: lever in position D, slopes of less
than 12% and speeds between 20 and 130
km / h (12 and 80 mph).
●
Gently take your foot off the accelerator.
The indication will be shown on the instru-
ment panel , the engaged gear and current
consumption will disappear and the word In-
ertia will appear.
The gears will automatically disengage and
the vehicle will roll freely, without the effect of
the engine brake. While the vehicle rolls, the
engine runs at idling speed.
Stopping inertia mode
●
Press the brake or the accelerator pedal.
To take advantage of the engine's inertia
mode, simply remove your foot from the ac-
celerator.
Applying both the inertia mode (= prolonged
section with less energy) and inertia discon-
nection (= shorter section without the need
for fuel) facilitates improved fuel consumption
and emission balance.
»
201
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