Functional requirements
Electric driving
▷ The high-voltage battery charge is suffi-
ciently high.
▷ The high-voltage battery temperature is not
too low or too high.
▷ Selector lever position D or R engaged.
▷ The accelerator pedal is not depressed too
far.
▷ The possible maximum speed for electric
driving is not exceeded.
Automatic starting of the combustion
engine while driving
Depending on vehicle configuration, the com-
bustion engine is automatically started when
driving under conditions such as the following:
▷ When accelerating heavily or on uphill
grades.
▷ By pressing the accelerator pedal beyond
the resistance point at the full throttle posi-
tion, kickdown.
▷ The charge state of the high-voltage bat-
tery is insufficient.
▷ High-voltage battery temperature is too
high or too low.
▷ Selector lever position S is engaged.
▷ During manual gear-shifting using the shift
paddles.
▷ Depending on vehicle equipment and na-
tional-market version: Anticipatory Hybrid
Drive with active route guidance, e.g., out of
town.
▷ System-related demand from the hybrid
components.
Automatic switching-off of the
combustion engine while driving
Depending on the driving situation, the com-
bustion engine is switched off if the conditions
for electric driving are met.
Auto Start/Stop function, coasting
Principle
The Auto Start/Stop function switches the
combustion engine off while the vehicle is
moving, when braking, when rolling to a halt,
and while the vehicle is stopped. The condition
of rolling to a stop without energy recovery is
also referred to as coasting. Comfort functions
such as automatic climate control are supplied
by the high-voltage battery and can remain
switched on.
After coasting, the combustion engine or elec-
tric motor provides the necessary drive power
automatically again, depending on the hybrid
mode.
Functional requirements
Coasting is possible under the following condi-
tions:
▷ If the traffic situation permits.
▷ Transmission position D is engaged.
▷ SPORT drive mode is not active.
Energy recovery
Principle
With energy recovery, also called recuperation,
the electric motor acts as an alternator and
converts the vehicle's kinetic energy into elec-
trical energy while braking and coasting.
This recovered energy charges the high-volt-
age battery. If necessary, this stored electrical
energy is output to the electric motor.
General information
Depending on the M Setup menu settings:
The high-voltage battery is charged at differ-
ent speeds, and the vehicle is decelerated at
different forces while coasting.
Seite 119
Driving
CONTROLS
119
Online Edition for Part no. 01405A8A608 - VI/23
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