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230
Int e llig e nt te chnol o g y
What you should know
The highest priority is given to maintaining
starting capability.
The battery is severely taxed in short-distance
driving, in city traffic and during the cold time
of year. Abundant electr ical energy is re-
qu ired, but only a little is generated. It is also
cr itical if the e ngine is not running and elect ri-
cal components
a re turned on. In th is in-
stance energy is being consumed but none is
being generated .
It is in precisely these situations that you w ill
notice energy management
actively regulat-
ing the distrib ution of energy.
Vehicle stand s for an ext ended period
If you do not drive your vehicle over a period
of several days or weeks, electrical compo-
nents are gradually cut back or switched off.
This reduces energy cons umption and main-
tains starting capab ility
over
a longer period.
Take into consideration that when you un lock
your ve hicle, some convenience functions,
such as the interior ligh t s or the power seat
adjustmen t , may not be available. The con-
venience functions will be available again
when you turn on the ignition and start the
engine.
With the engine turned off
If you listen to the radio, for example, with
the eng ine turned off or use other MMI func-
tions, the battery is being discharged .
If sta rting capability is jeopa rdized due to en-
e rgy consumpt ion, the follow ing warning ap-
pears in the MMI disp lay:
Please start engine, otherwise system will
swit ch off in 3 minute s.
The warning ind icates that the system will be
turned off automatically after 3 m inutes .
If
you wish to cont inue us ing the functions, you
have to start the engine.
With the engine runnin g
Although e lectrical energy is gene rated when
the vehicle is being driven, the battery can be-
come discharged. This happens mostly when
little energy is being generated and a great
deal consumed and the battery's state of
charge is not optimal.
To bring the energy balance back into equili-
brium, consumers which req uire especially
large amounts of energy are temporar ily cut
back or sw itched off. Heat ing systems in par-
t icular require a great deal of energy. If you
notice, for example, that the heated seats* or
the heated rear window are not heating, they
have been tempora rily cut back or switched
off. These systems w ill be available again as
soon as t he energy balance has been restored.
You w ill also notice that engine idle speed has
been increased slightly . This is normal and not
a cause for con cern. By increas ing engine idle
speed the additional energy required is gener-
ated and the battery is charged.
Driver notification in the instrument
cluster display
If battery power drops into the range where it
can limit the ability of the engine to start, this
is shown in the instrument cluster display
with the fo llow ing driver message:
(•) lo w batte ry charge: battery will be
charged whil e driving
This notificat ion reminds you that the starting
capability of the engine may be lim ited. As
soon as you start dr iving again, the battery
will be recharged and the not ificat io n will go
out .
Drive r notific at ion appears and goes out
again
If this driver notification appears after the ig-
nition is turned on or wh ile driving and it goes
out again after a while, the battery has been
adequately recharged.
.,.
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