The combustion engine automatically
disengages and disengages. The vehicle glides
without propulsive power.
Energy recovery is indicated in the instrument
cluster display or in the infotainment system. In
this case, the combustion engine can be switched
off automatically. The rev counter in the
instrument cluster does not indicate the engine
speed and remains on low.
Reduce speed by stopping acceleration in
advance and not by braking. Inertia travel is
possible. Overspeeding is reduced without
consuming as much fuel as when braking → p.
Behaviour when moving or stopping
The combustion engine only operates when
necessary. Normally, when the vehicle is
stationary, the combustion engine is switched
off and the vehicle's electrical systems are
powered by the high-voltage battery. The rev
counter in the instrument cluster does not
display the engine speed and remains at .
Use the S gear ratio moderately. The sporty
driving style with the sport programme
activated increases fuel consumption. In the
sport programme, coasting with the engine
automatically switched off is only possible up to
a speed of approx. 70 km/h (44 mph).
The fact that the combustion engine is switched
off depending on the driving conditions is
normal and intentional in the case of hybrid
systems in order to save fuel. In general, the
power steering and brake assist systems remain
activated. In isolated cases the system may
require the combustion engine to remain
running even when the vehicle is stationary. In
the case of heavy traffic jams, the combustion
engine is switched off cyclically during vehicle
stops in order to recharge the high-voltage
battery for the subsequent start and stop
phases.
Maximum acceleration (boost)
To achieve maximum acceleration, the vehicle is
driven jointly by the combustion engine and the
electric motor. This mode of operation is called
boost and is only available for a short time
because the energy consumption is very high.
Boost mode is activated:
– If full throttle is applied (kick-down) in gear
ratio D.
– OR: by fully depressing the accelerator pedal
while driving with the selector lever in the
S position.
Constant driving and travel without
propulsion (by inertia)
– OR: by fully depressing the accelerator pedal
when driving with Tiptronic.
If the accelerator is not depressed and the
selector lever is in position D, the combustion
engine is also switched off when driving at high
speeds. As a result, the vehicle slows down
less during deceleration than conventional
vehicles, which can be used in anticipatory
driving to reduce fuel consumption. In this
vehicle state, the rev counter in the instrument
cluster also does not indicate the engine speed
and remains at zero.
Braking energy recovery (load)
When the vehicle brakes, electrical energy is
generated bythe electric motor and stored in
the high-voltage battery. This also occurs to a
lesser extent when the vehicle is coasting or
driving downhill during deceleration.
When the high-voltage battery is fully charged,
there is no recovery of braking energy and thus
no engine braking effect. If the vehicle detects
that the road conditions do not permit safe
contact between the wheels and the road
surface, energy recovery and thus the effect of
the engine brake is automatically reduced.
Noise in hybrid vehicles
There are certain noises, e.g. produced by the
power steering, which are not perceptible when
the combustion engine is running, but which may
be perceptible in electric mode. These noises are
not important
.
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Instruction manual