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functions will be available again when you
switch 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 othe r MMI func-
tions, the battery is being discha rged.
If starting capability is jeopardized due to en-
e rgy consumpt ion, the fo llow ing warning ap-
pears in the MMI disp lay:
Please start the eng ine soon or t he system
w ill be t urned off.
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 running
Although electrical energy is generated when
the vehicle is be ing driven, the battery can be-
come discharged . This happens mostly when
little energy is be ing generated and a great
deal consumed and the battery's state of
charge is not optimal.
To br ing the energy balance back into equili -
brium, consumers which require especially
large amounts of energy are tempo rarily cut
back or swit ched off. Heating systems in par-
ticular requ ire a g reat dea l of energy. If you
notice, fo r example, that the heated seats* or
the heated rear window are not heating, they
have been temporari ly cut back or switched
off. These systems will be ava ilab le again as
soon as the energy balance has been restored.
You will a lso notice that engine idle speed has
been increased slightly . This is norma l and not
a cause for concern . By increasing engine idle
speed the add itiona l energy required is gener-
ated and the battery is charged.
Int e llig e nt technolog
y
183
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