engine AUDI Q5 2013 Workshop Manual

conditions. Always be ready to apply the
brakes.
Manual shift program
Using the manual shift program you can
manually select gears.
F ig. 135 Cente r console: sh ift in g t he gears manual ly
Fig. 136 S tee rin g wheel: S hift b utto ns*
Gear selection with selector lever
The tiptronic mode can be selected either with
the vehicle stationary or on the move.
.. Push the selector lever to the right from 0/
S. An
M appears in the instrument cluster
display as soon as the transmission has
shifted.
.. To upshift, push the selector lever forward
to the plus position
0 c:> fig. 135 .
.. To downshift, push the lever to the minus
pos ition
0 -
Gear selection with paddle levers*
The shift buttons are activated when these­
lector lever is in D/S or the t iptron ic manual
shift program.
.. To upshift, touch the button on the right
0
c>fig . 136.
Autom atic transm ission 12 7
.. To downshift, touch the button on the left
0 .
.. If you do not press a sh ift button within a
short time while in the D/S position, the
transmission will return to automatic mode.
To keep shifting using the shift buttons,
move the selector lever to the r ight out of
the D/S position .
The transm iss ion automatically shifts up or
down before cr itical engine speed is reached.
The transmission only allows manual shifting
when the eng ine speed is with in the permit­
ted range .
@ Tips
-When you shift into the next lower gear,
the transmission will downshift only
when there is no possibility of over-rev­
ving the engine.
- When the kick-down comes on, the
transmission will shift down to a lower
gear, depending on vehicle and engine
speeds.
- Tiptron ic is inoperative when the trans­
mission is in the fail-safe mode.
- Hybrid drive*: electric driving is not pos­
sible in tiptronic mode.
Kick-down
Kick-down enables maximum acceleration .
When you depress the accelerator pedal be­
yond the resistance point, the automatic
transmission downsh ifts into a lower gear, de­
pending on vehicle speed and engine speed .
The upshift into the next higher gear takes
place once the max imum specified engine
speed is reached .
_& WARNING
Please note that the drive wheels can spin
if kick-down is used on a smooth slippery
road -there is a risk of skidding .

Programming the transmitter (version B)
Applies to vehicles: with Horne link
Fig. 15 1 Distance between the radiator gr ille and the
hand transmitter
P rogrammin g: ph ase 1 on the control unit
1. Sw itch on the ig nit ion (do no t start the
engine) .
2. Press and hold both of the outer Home­
Link buttons
r=>page 135, fig. 149 until
the LED @ turns off completely (about
20
seconds). Th is procedure clears the stand­
ard codes that were set at the factory and
does
n ot need to be repeated agai n to
p rog ram the other buttons.
3. Briefly press the Homelink button that
you would li ke to prog ram .
4 . Wai t unti l the LED @ beg ins to b link
q ui ckly. The Home Link modu le wi ll now
remai n in learning mode for
5 minutes .
5. Now stand in front of your vehicle with
the original hand transmitter for the ga­ rage door opener or for the device that
you would like to allocate to the Home­
Link button.
Programming: pha se 2 on th e radiator
grille
6 . Hold the orig inal hand transmitter some­
what towa rds the center of your vehicle 's
radiato r grille r=>
fig. 151.
7. Now act ivate (p ress) t he hand transmit­
ter.
8 . Pay a ttention to the tu rn signals for you r
vehicle when activating the ha nd trans­
mitter . If t he emergency flashers blink
three times, the programming was suc­
cessful. If the emergency flasher only
bli nks one t ime, the 5 minute t ime limit
Homelink ® 13 7
for the adaptation has expired or the pro ­
gram ming was unsuccessful. Repeat the
programming from step 3 on the controls
or select another distance from the radia­
tor grille.
9. If the garage door or other devices sti ll
fail to be activated w it h the Homelink
control buttons after p rogramming is
comple ted, it is possib le tha t these sys­
tems might be working with a rolling code
ins tead of the normal fixed code .
A Roll­
ing code programming must be per ­
formed
r=> page 138 .
Program the rema ining two buttons a ccord ing
to the instructions mentioned above . Beg in
similar ly w ith the 3rd step if the program ­
ming connection was successful for t he first
button.
Remote con tro l units fo r garage door opene rs
in Canada are set to stop transmitting radio
frequency signa ls after two seconds . This time
may not be suffic ient for the Homelink sys­
tem to learn the radio frequency signa l. Per­
form all other steps as described above.
Erasing the buttons
.,. Switch o n the ignition (do not start the en­
gi ne).
.,. Press and hold both of the outer buttons
until the LED @ turns off completely (about
20 seconds) to erase all of the buttons si­
m ultaneously .
.,. Programmed buttons cannot be erased ind i­
vidua lly. Reprogram the buttons if necessa­
ry .
Reprogramming the buttons
.,. Switch on the ignition (do not start the en­
gine) .
.,. To reprogram an individua l butto n, press
and hold the button unt il the LE D @ starts
to f lash quickly (after abo ut ten seconds) .
Release t he but ton imme dia tely. The Home­
L ink module will now remain in learning
mo de for 5 minutes.
.,. Continue with step 5.

150 Safety belts
-Failure to pay attention to the warning
light that come on, could lead to person­
al injury.
Why safety belts?
Frontal collisions and the law of physics
Frontal crashes create very strong forces for
people riding in vehicles.
Fig. 156 Unbelted occupants in a ve hicle heading for a
wall
Fig. 157 Th e vehicle c rash es into the wall
The physical principles are simple. Both the
vehicle and the passengers possess energy
which varies w ith veh icle speed and body
weight . Engineers call this energy "kinetic en­
e rgy ."
T he higher the speed of the vehicle and the
greater the vehicle's weight, the more energy
that has to be "absorbed" in the crash .
Vehicle speed is the most significant factor.
If
the speed doubles from 15 to 30 mph (25 to
50 km/h), the energy increases 4 times!
Because the passengers of this veh icle are not
using safety belts¢
fig. 156, they will keep
moving at the same speed the vehicle was
mov ing just before the crash, until something
stops them - here, the wall ¢
fig. 157 .
The same principles apply to people sitting in
a vehicle that is involved in a frontal collision .
Even at c ity speeds of 20 to 30 mph (30 to 50
km/h), the forces acting on the body can
reach one ton (2,000 lbs. or 1,000 kg) or
more . At greater speeds, these forces are even
higher .
Peop le who do not use safety belts are also
not attached to their vehicle. In a frontal colli­
s ion they will also keep moving forward at the
speed their vehicle was t ravell ing just before
the crash . Of course, the laws of physics don't
just apply to frontal collisions, they determine
what happens in all kinds of accidents and col­
lisions .
What happens to occupants not wearing
safety belts?
In crashes unbelted occupants cannot stop
themselves from flying forward and being in­
jured or killed. Always wear your safety belts!
Fig. 158 A d river not wea ring a safety b elt is viol en tly
thrown fo rwa rd
Fig . 159 A rear passe nge r not wearing a safety belt
w ill fl y forward and strike the driver
Unbelted occupants are not able to resist the
tremendous forces of i mpac t by holding tight
or bracing themselves. Without the benefit of
safety restraint systems , the unrestrained
ll-

occupant will slam violently into the steering
wheel, instrument pan el, w indshield , or what­
ever else is in the way
c::> fig. 158. This impact
with the vehicle interior has all the energy
they had just before the crash.
Never rely on airbags alone for protection.
Even when they deploy, airbags provide only
additional protection. Airbags are not sup­
posed to deploy in all kinds of accidents. Al­
though your Audi is equipped with airbags, all
veh icle occupants, including the driver, must
wear safety belts correctly in order to mini­
mize the risk of severe injury or death in a
crash.
Remember too, that airbags will deploy only
once and that your safety belts are always
there to offer protection in those accidents in
which airbags are not supposed to deploy or
when they have already deployed. Unbelted
occupants can also be thrown out of the vehi­
cle where even more severe or fatal injur ies
can occur.
It is also important for the rear passengers to
wear safety belts correctly. Unbelted passen­
gers in the rear seats endanger not only them­
selves but also the driver and other passen­
gers
c::> fig. 159. In a frontal collision they will
be thrown forward violently, where they can
hit and injure the driver and/or front seat pas ­
senger.
Safety belts protect
People think it's possible to use the hands to
brace the body in a minor collision . It's simply
not true!
Fig. 160 Driv er is c orr ect ly rest rain ed in a sudd en brak­
ing man euve r
Safety belts 151
Safety belts used properly can make a big dif­
ference. Safety belts help to keep passengers
in their seats, gradually reduce energy levels
applied to the body in an accident, and help
prevent the uncontrolled movement that can
cause serious injuries . In addition, safety belts
reduce the danger of being thrown out of the
vehicle .
Safety belts attach passengers to the car and
give them the benefit of being slowed down more gently or "softly" through the "give" in
the safety belts, crush zones and other safety
features engineered into today's vehicles. By
"absorbing" the kinetic energy over a longer
period of time, the safety belts make the
forces on the body more "tolerable" and less
likely to cause injury.
Although these examples are based on a fron­
tal collision, safety belts can also su bsta ntia l­
ly reduce the risk of injury in other kinds of
crashes. So, whether you're on a long trip or
just going to the corner store, always buckle
up and make sure others do, too. Accident sta­
tistics show that vehicle occupants properly
wearing safety belts have a lower risk of being
injured and a much better chance of surviving
an accident. Properly using safety belts also
greatly increases the ability of the supplemen­
tal airbags to do their job in a collision . For
this reason, wearing a safety belt is legally re­
quired in most countries including much of
the United States and Canada.
Although your Audi is equipped with airbags,
you still have to wear the safety belts provid­
ed. Front airbags, for example, are activated
only in some frontal collisions. The front air­
bags are not activated in all frontal collisions,
in side and rear collisions, in roll overs or in
cases where there is not enough deceleration
through impact to the front of the vehicle.
The same goes for the other airbag systems in
your Audi. So, always wear your safety belt
and make sure everybody in your vehicle is
properly restrained!

Intelligent technology Notice about data
recorded by vehicle
control modules
Your vehicle is not equipped with an Event Da­
ta Recorder (EDR), installed by some manu­
facturers for the express purpose of capturing
data for retrieval after an accident or crash
event. EDR's are sometimes called "crash re­
corders".
Some state laws restrict the retr ieval or down­
loading of data stored by EDR's that were in­
stalled in a vehicle for the express purpose of
retrieving data after an accident or crash
event without the owner's consent.
Although your vehicle is not equipped with an
EDR, it is equipped with a number of electron­
ic control modules for various vehicle systems
such as, for examp le, engine function, emis­
sion control, as well as for the airbags and
safety belts.
These electronic control modules also record
vehicle-related data during norma l vehicle op­
eration for diagnostic and repair purposes.
The recording capacity of the electronic con­
trol modules is limited to data (no sound is re­
corded) and only a small amount of data is ac­
tually recorded over a very limited period of
time and stored when a system fault or other
condition is sensed by a control unit. Some of
the data then stored may relate to vehicle
speed, direction, braking as we ll as restraint
system use and performance in the event of a
crash or other condition. Stored data can only be read and downloaded with special equip­
ment.
Electronic Stabilization
Control (ESC)
Description
The Electronic Stabilization Control (ESC) rein­
forces driver safety. It reduces the risk of slip ­
ping and improves driving stability. ESC de­
tects critical s ituations such as the vehicle
Intelligent technology 197
oversteering and understeering or the whee ls
spinning . The vehicle is stabilized by applying
the brakes or reducing eng ine torque . Once
the ESC is active, the indicator light
G1 blinks
in the instrument cluster.
ESC includes the anti-lock brake system (ABS),
brake assist system, anti-slip regulation
(ASR), electronic differential lock (EDL), dy­
namic steering*, hill descent assist and selec­
tive wheel torque control.
Anti-lock braking system (ABS)
ABS prevents the whee ls from locking up
when braking . The vehicle can still be steered
even during hard braking. App ly steady pres­
sure to the brake pedal. Do not pump the ped­
al. A pulsing in the brake pedal indicates that
the system is helping you to brake the vehicle .
Brake assist system
The brake assist system can decrease braking
distance. It increases braking power when the
driver presses the brake pedal quickly in emer­
gency situations . You must press and hold the
brake pedal until the situation is over . In
vehicles with adaptive cruise control*, the
brake assist system is more sensitive if the
distance detected to the vehicle ahead is too
small.
Anti-slip regulation (ASR)
ASR reduces engine power when the drive
wheels beg in to sp in and adapts the force to
the road conditions. This makes it easier to
start, accelerate and drive up hill s.
Electronic differential lock (EDL)
The EDL brakes wheels that are spinning and
transfers the drive power to the othe r whee ls .
T his function is available up to about 78 mph
(125 km/h) .
In extreme cases, EDL automatically switches
off to help keep the brake on the braked wheel
from overheat ing. EDL will switch on again au­
tomatically when conditions have returned to
normal.
•
•

198 Intelligent technology
Dynamic ste ering *
On vehicles with dynamic stee ring* , ES C helps
stabilize the st eering in critical s ituations .
Selective wh eel torque c ontrol
The selective whee l torque control operates
when dr iv ing through curves . T he front wheel
on the inside of the curve or both wheels on
the inside of the curv e are braked selective ly
as needed. This m inimizes sliding in the front
wheels and allows for more pr ecise driving
through curves . T he system may not act ivate
when driving in wet or snowy cond itions .
A WARNING
-ESC, ABS, ASR, EDL dynamic steering"
and the se lective wheel torque control
cannot overcome the laws of physics .
Th is is especially important on slippery
or wet roads.
If the systems begin act ing
to stabilize yo ur vehicle , you sho uld im­
med iately change your speed to ma tch
the road and traffic condit ions. Do not
let the increased safety provided by
these systems tempt you to take risks. Do ing so wi ll increase the risk of a loss of
vehicle control, collision and serious per­
sonal injuries .
- Always adapt your speed to road, traff ic
and weather condit ions. The risk of Los-
-
ing cont ro l of the veh icle increases when
dr iv ing too fast, especially th rough
c u rves and on slippery o r wet roads, and
when d riving too close to vehi cles up
ahead. ESC, A BS, the brake assis t sys­
tem, AS R, EDL, dynamic steering* and
the se lective wheel torque control can­
not prevent collis ions.
-Always acce lerate with specia l care on
even, smooth surfaces s uch as those that
are wet or covered with ice and snow.
The drive wheels can spin even with
these ass istance systems that cannot al­
ways help to reduce the risk of loss of ve ­
hicle control.
(D Tips
- ABS and ASR only wo rk correctly when
all four wheels are equipped with identi­
cal tires. Different tire si zes can lead to a
reduction in engine power .
- Yo u may hear noises when the systems
described are working.
- If the ind icator light
DJ or E (USA
mode ls)/ m] (Canada models) appears,
there may be a malfunction
q page 15 ,
q page 17.
-When i nstalling a factory -supplied roof
rack system on the roof railing, the ESC
will adapt itse lf to a different center of
gravity .
Switching on/off
ESC turns on automatically when you start
the engine.
F ig. 1 86 Vers ion A: l owe r ce nte r con so le, butto n YJ
OFF
Fig. 1 87 Version B: upper cente r console, button YJ
OFF
ESC Offroad mode
The ESC Off road mode was developed espe­
c ia lly for offroad driving . In o rder to maintain
max imum trac tion and optimal b raking when
driv ing offroad, the cond it ions for the ESC to
IJII,

200 Intelligent technology
job if the incline is icy or if the incline ground
is loose ¢&. .
The system does not work at speeds between
19 and 37 mph (30 and 60 km/h) . Th e system
is then in the ready-mode. The diode in the
button will come on. The system automatical­
l y switched off when you drive faster than 3 7
mph (60 km/h). The diode will go out in this
case.
Active control at a specific speed up to approx­
imately 19 mph (30 km/h) w ill appear in the
instrument cluster disp lay ¢
fig. 189. Two
dashes" •• " will appear in the ready mode.
Hill descent assist is automatica lly activated
under the fo llow ing cond itions:
- the diode in the button illuminates,
- vehicle speed is be low approximately
19 mph (30 km/h)
- the inclin e is 10%.
.&_ WARNING
-Always adapt your speed to the weather,
road and traffic conditions. Do not let
the increased safety provided tempt you
into taking risks.
- T he hill descent assist system cannot
overcome the laws of physics. Your driv­
ing sty le m ust always be adapted to the
c u rrent road and traffic conditions.
- The hill descent assist may not be able to
hold your vehicle at a constant speed un­
der all cond it ions wh ile driving on an in­
cl ine (for example if ground under the
vehicle is loose) .
Brake system
Operating conditions and driving habits
The brakes on today's automobi les are sti ll
subject to wear, depending largely on operat­
ing conditions and dr iv ing habits ¢&. . On
vehicles that are e ither driven mostly in stop­
and -go city traffic or are driven hard, the
brake pads should be checked by your author­
ized Audi dealer more often than specified in
the
Warranty & Maintenance booklet . Failure to have you
r brake pads inspected can result
in reduced brake performance.
On steep slopes , you should use the braking
effect of the engine . This way, you prevent un­
necessary wear on the b rake system . If you
must use your brakes, do not hold the brakes
down cont inuous ly. Pump the brakes at inter­
vals.
Noises may occur when braking depending on
the speed, braking force and outside condi­
t ions such as temperature and humidity .
Moisture or road salt
Under certain conditions, for example, when
driv ing through water or very heavy rain, or
even after washing your vehicle, the braking
effect can be reduced due to moisture (or in
freezing conditions ice) on the brake pads. A
few careful brake applications should dry off
the brake pads or remove any ice coatings.
When you are driving at higher speeds with
the windshie ld wipers on, the brake pads will
briefly touch the brake discs in regu lar inter­
vals so as to improve reaction time when brak­
ing on wet surfaces . You, the driver, will not
notice anything .
The effectiveness of the brakes can be reduced
when the vehicle is driven on a salt-covered road and the brakes are not used . Here too,
you should clean off accumulated salt coating from brake discs and pads w ith a few careful
applications of the brake ¢.& .
Corrosion
There may be a tendency for dirt to build up
on the brake pads and corros ion to form on
the discs if the car is not driven regularly or
o n Ly for short trips with little use of the
brakes.
If the brakes are not used frequently, or if cor ­
r os ion has formed on the d iscs, it is adv isable
to clean off the pads and discs by braking
firmly a few times from a moderately high
speed¢ ,&. .,..

Fa u lts in th e brake sy stem
If you should notice a sudden increase in
brake peda l travel, then one of the two brake
circuits may have failed~.&. .
Low brak e flu id level
Malfunct ions can occur in the brake system if
the brake fl uid leve l is too low . T he b rake fluid
l eve l is monito red electronically .
Brake booster
The brake booster increases the pressure that
you generate w ith the brake pedal.
It only op­
e rates while the eng ine is running or with the
i gnit ion sw itched on (hybr id dr ive*) ~.&, .
Brake lining wear statu s
Brake lining wear may be checked by visual in ­
spection of the condition of the brake pads
through the openings in the whee l. If neces­
sa ry, the wheel may be removed for this in­
spection
~ page 2 74, Changing a wheel.
.&_ WARNING
=
- You should perform braking maneuvers
for the purpose of clean ing the brake
system on ly if road conditions permit.
Other road users must not be put at risk -
you may cause an acc ident!
- Before descending a steep grade, reduce
speed and shift transmiss ion into a lower
gear or lower driving range . Do not ride
the brakes or hold the pedal down too long or too often . This could cause the
brakes to get hot and dimin ish b raking
efficiency .
- Do not "ride the brakes" by resting your
foot on the pedal when you do not intend
to brake . Th is may cause the b rakes to
overheat, premat ure wear and increased
stopping distance .
- Under certain climat ic and operating
condit ions such as passing through wa­
ter , driving in heavy rain or after wash ing
the vehicle, the effectiveness of the brakes can be reduced. In winter, ice can
accumulate on the brake pads, linings,
discs and drums . Carefully apply brakes
Int ellig ent technolog y 201
for a test. Brakes will dry and ice coat­
ings w ill be cleaned off after a few care­
ful brake applicat ions.
- Driving for an extended period of time on
salt-covered roads without using your
brakes can also affect braking efficiency.
Clean off accumulated salt coating from
brake discs and pads with a few careful
brake applications.
- If you damage the front spoiler, or if you install a different spoiler, be sure the air
f low to the front brakes is not obst ruct­
ed. Otherw ise the brake system could
overhea t reducing the effectiveness of
the entire brake system .
- Failure of one brake circuit will impair
the braking capability resulting in an in­
creased stopping distance . Avoid driving
the vehicle and have it towed to the near­
est a uthori zed Audi dea ler or qualified
workshop.
- Never let the vehicle roll to a stop with
the engine shut off .
- If the brake booster is not working, for
examp le when towing your vehicle, or
because the brake booster has somehow
been damaged, the brake pedal must be
pressed considerably harder to make up
for the lack of booster assistance .
Electromechanical
power assist, Dynamic
steering
The electromechanical power assist helps the
driver when s teering.
Power ste ering adapts electronically based on
the vehicle speed.
Indicator lights an d m ess age s
• Steeri ng defe ctive ! D o n ot dr ive vehi cle!
If this indicator light turns on and stays on
and this message appears, the power steer ing
may have failed .
Stop the vehicle in a safe location as soon as poss ible . Do
no t continue driving . See your ..,.
•
•

202 Intelligent technology
authorized Audi dealer or other qualified re­
pair facility for assistance.
'I-ij Dynamic steering: System fault! You can
continue driving
If the indicator light turns on and the mes­
sage appears, the steer ing may be more diffi­
cul t to move or mo re sensitive than usual. The
steer ing may also be at an angle when driving
straight.
Drive slowly to your author ized Audi dealer or
qualified workshop to have the malfu nction
cor rected.
(;:r,ij Dynamic steering : Initializing
Aud i drive select": if the indicator light blinks
and the driver message appears, the dynam ic
steering* is reinitialized. Once you start the
engine after this is finished, the steering
wheel will be easy to move. Re-initialization might be necessary if the steering wheel was
moved hard to the left and right while the ve­
hicle was not moving. The display turns off if
the initialization was successfu l.
(D Tips
-If the . or 'Tj indicator light only stays
on for a short time, yo u may continue
driving.
- The dynamic steering* stability systems
opoge 197 are not ava ilable in the event
of a system malfunction.
- For additional information on dynamic
steering*
o page 120 .
Driving with your
quattro ®
With all-wheel drive, all four wheels are driv ­
en .
General information
With all-wheel dr ive, power is distributed to
all four wheels. This happens automatically
depending on your dr iving style and the road
conditions at the time . See also ¢
page 197.
A center different ial distr ibutes the dr iv ing
power var iably to the front and rear axle.
It
works together with selective wheel torque
control, which activates when driving through
curves
¢ page 198.
The all-wheel drive concept is des igned for
high engine power. Your veh icle is exception ­
ally powerfu l and has excellent driving charac­
teristics both under normal driving conditions
and on snow and ice. Always read and follow
safety precaut ions¢ &.
Winter tires
When driving in the winter, yo ur vehicle with
all -wheel drive has an advantage, even with
regular tires. In winter road conditions it may
be advisable to mount winter tires (or all-sea­
son tires) for improved driveability and brak­
ing: these tires must be mounted o n
all four
wheels .
See also¢ page 263, Winter tires.
Tire chains
Where tire chains are mandatory on certain
roads, this normally also app lies to veh icles
with all-wheel drive¢
page 264, Snow
chains.
Replacing wheels/tires
Vehicles with all -wheel drive must always
have tires of the same s ize. A lso avoid tires
with different tread depths. For deta ils see
page
o page 2 59, New tires and replacing
tires and wheels.
A WARNING
-Always adjust your dr iv ing to road and traf-
fic conditions. Do not let the extra safety
afforded by all-wheel drive tempt you into
taking extra risks.
- Altho ugh the all-wheel drive is very ef­
fective, always remember that braking
capacity is limited by tire traction. You
should therefore not d rive at excessive
speeds on icy or slippery road surfaces.
- On wet road surfaces, be careful not to
drive too fast because the front wheels
could begin to slide on top of the water
(aquaplaning). If this should occur, you

will have no warning from a sudden in­
crease in engine speed as with a front­
wheel drive vehicle. A lways drive at
speeds wh ic h are suited to the road con­
ditions -risk of crash .
Energy management
Starting ability is optimized
Energy management controls the distribution
of electrical energy and thus optimizes the
availability of electrical energy for starting
the engine.
If a vehicle with a conventional energy system
i s not driven for a long pe riod o f time, the bat ­
tery is discharged by idling current consumers
(e .g. immobilizer) . In certain circumstances it
can result in there being insufficient energy
avai lab le to start the engine.
I ntelligen t energy management in your vehi­
cle hand les the distribution of electrical ener­
gy . Starting ability is marked ly improved and
the life of the battery is extended .
Basically, energy management consists o f
batter y diagno sis, idling cur rent man age­
m ent
and dyn amic en e rg y m anagement.
Battery diagnosis
B attery d iagnosis continuously dete rmines
the state of the battery. Sensors determ ine
battery vo ltage, battery current and battery
temperature. This determines the current
state of charge and the power of the battery.
Idling curr ent management
Idling current management redu ces energy
consumption while the vehicle is stand ing.
With the ignition switched off, it contro ls the
energy supply to the various electrica l compo­
nents . Data from battery diagnosis is consid­
ered.
Depending on the battery's state of charge,
individual consumers are grad ually turned off
to prevent excessive discharge of the battery
and thus mainta in start ing capability.
Int ellig ent technolog y 203
Dynamic energy management
While the vehi cle is being driven, dynamic en­
ergy management distrib utes the energy gen ­
erated according to the needs of the individ u­
al components. It regulates consumption, so
that more e lectrical energy is not being used
than is being generated and ensures an opti­
mal state of charge fo r the battery .
{!) Tips
- But even energy management cannot
negate the limits of physics. Consider
that the power and life of a battery are
limited .
- If start ing ability is threatened, the indi­
cator light(•] appears ¢
page 34.
What you should know
The highest priority is given to maintaining
starting capability.
The battery is severe ly taxed in short -distance
driv ing, in city traff ic and during the cold time
of year. Abundant electrical energy is re­
quired, but on ly a little is generated . It is also
c rit ical if the engine is not running and electri­
ca l components are turned on . In this in­
stance ene rgy is be ing consumed but none is
being genera ted .
It is in precisely these situations t hat you will
notice ene rgy management active ly regu lat­
i ng the d istribu tion of ene rgy.
Vehicle stands for an extended period
If you do not drive your vehicle over a period
of several days or weeks, electr ical compo ­
nents are gradually cut back or switched off .
T h is reduces energy consumption and ma in­
ta ins start ing capability over a longer pe riod .
Some of the convenience functions may not
operate, such as the interior ligh ts or the
power seat adjustment. The convenience
functions wi ll be available again when you
switch on the ignition and start the engine.
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