Gearbox: press the brake and engage a
gear again
●
If the warning was caused by the temperature
of the gearbox, this driver message will be dis-
played when the gearbox has cooled again.
Emergency mode
If all the gear positions are shown over a light
background on the instrument cluster, there is
a system fault and the automatic gearbox will
operate with the backup programme. It is still
possible to drive the vehicle, however, at low
speeds and within a selected range of gears.
Driving in reverse gear may not be possible.
Parking lock manual release mechanism
If, in the event of a power failure (e.g. the
12-volt vehicle battery is drained), the vehicle
must be towed and the parking lock can be re-
leased manually. In this case, you should seek
professional assistance.
Driving on slopes
Hill Hold Control (HHC)
When driving up a slope or driving in Oroad
with the lever in position D/S, stopping the ve-
hicle switches on the hill hold control.
When the brake pedal is released, the assistant
keeps the vehicle’s brakes applied for a few
seconds to give the driver time to press the
accelerator pedal and continue driving.
downhill assistant
Downhill speed control is activated when the
gear lever is in the D/S position and the brake
is applied. An appropriate lower gear is en-
gaged.
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 pressing
the brake.
The assistant can only change down as far as
3rd gear. It is possible that on very steep slopes
you may have to switch to tiptronic mode and
thus manually change down to 2nd or 1st gear
to take advantage of engine braking and take
the load o 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
›››page198, downhill speed control is activa-
ted when you set a cruising speed.
WARNING
The downhill speed control cannot defy the
laws of physics. Therefore, speed cannot be
maintained constant in all situations. Always
be prepared to use the brakes!
Hill Descent Control (HDC)
✓ Valid for vehicles: with 4Drive all-wheel drive
The HDC function is activated automatically
when driving down a steep hill in Oroad
mode.
Hill Descent Control limits speed on steep
downhill gradients by automatically braking all
four wheels, helping the driver to maintain pre-
cise control of the vehicle on o-road gradi-
ents without having to constantly apply the
brakes.
The system works in both forward and reverse,
even if the N position is selected on the gear-
box. Keeping the anti-lock brake system active
prevents the wheels from locking.
In vehicles with manual gearboxes, the Hill De-
scent Control adapts the theoretical speed
without braking the engine below its idling
speed.
Hill Descent Control is available when the dash
panel display shows the message .
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