Table of Contents
Advertisement
Smart
Technology
ignition switched off, it controls the energy sup-
ply to the various electrical components. Data
from battery diagnosis is considered.
Depending on the battery's state of charge, indi-
vidual consumers are gradually turned off to pre-
vent excessive discharge of the battery and thus
maintain starting capability.
Dynamic energy management
While the vehicle is being driven, dynamic energy
management distributes the energy generated
according to the needs of the individual compo-
nents. It regu lates consumption, so that more
electrical energy is not being used than is being
generated and ensures an optimal state of
charge for the battery.
(D
Tips
- But even energy management cannot neg-
ate the limits of physics. Consider that the
power and life of a battery are limited.
- If starting ability is threatened, the indica-
tor light (•) appears
9
page 15,
Cl
Battery.
What you should know
The highest priority is given to maintaining start-
ing capability .
The battery is severely taxed in short-distance
driving, in city traffic and during the cold time of
year. Abundant electrical energy is required, but
only a little is generated . It is also crit ical if the
engine is not running and electrical components
are turned on. In this instance energy is being
consumed but none is being generated .
It is in precisely these situations that you will no-
tice energy management actively regulat ing the
distr ibut ion of energy .
Vehicle stands for an extended period
If you do not drive your vehicle over a period of
several days or weeks, electrical components are
gradually cut back or switched off. This reduces
energy consumption and ma inta ins starting ca-
pability over a longer period . Some of the con-
venience funct ions may not operate, such as the
interior lights or the power seat adjustment. The
196
convenience functions will be available again
when you switch on the ignition and start the en-
gine.
With the engine turned off
If you listen to the radio, for example, with the
engine turned off or use other MMI funct ions,
the battery is being discharged .
If starting capab ility is jeopardized due to energy
consumption, a message appears in the MMI dis-
play.
The message indicates that the system will be
switched off automat ically in a moment . If you
wish to cont inue using the functions, you have to
start the eng ine.
With the engine running
Although electrica l energy is generated when the
vehicle is being driven, the battery can become
discharged. This happens mostly when little en-
ergy is being generated and a great deal con-
sumed and the battery's state of charge is not
opt imal.
To bring t he energy balance back into equilibr i-
um, consumers which require espec ially large
amounts of energy are temporarily cut back or
switched off. Heating systems in particular re-
quire a great dea l of energy. If you notice , for ex-
amp le, that the heated seats* or the heated rear
window are not heating, they have been tempo-
rarily cut back or switched off. These systems will
be available aga in as soon as the energy balance
has been restored.
You will also 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 additional energy required is generat-
ed and the battery is charged .
Advertisement
Table of Contents
