2018 AUDI A8 four wheel drive

lL t:0 ....
"" ......
"" .... 0 0 :c ' Multifunction steering
wheel
Operating
A pp lies to: ve hicles with mult ifunction steering wheel
You can opera te various MM I functions and the
driver information sys tem, change the volume,
and turn the voice reco gnition system * on and
off with the multifunction steering wheel.
F ig. 5 Driver info rmat ion sys te m
Fig . 6 M ult ifunct ion steer ing w heel operat ion
Requ irement: the ign it ion and the MMI must be
sw itche d on
<=:>page 135.
Operating the driver information system
The drive r information system contains mult iple
tabs @<=:> fig. 5 that display various informat ion
@ .
The fo llow ing tabs are available, depending on
ve hicle equ ipment:
First ta b Vehicle information,
assis tance systems
Second tab
a) Indicator lights, driver
messages, speed warn-
i n g system
Cockpit overview
T hir d t ab bl Nigh t vision assist*
<=:> page 109
Fourt h tab Radio/media
<=:> page 13
Fifth tab Telephone*
<=:> pag e 14
Sixth tab Navigation *
<=:>page 15
•l Thi s tab is only v is ible if at least o ne in dica tor lig ht or
messa ge is show n or if t he co rr espo nding syste m is
sw it c h ed on .
b) Thi s tab is on ly v is ib le if Night vis io n ass ist• has been act i­
vat ed .
@ !<1 t> ! Button
- Switching tabs : press the l<1 1> I button repeated­
ly unt il t he desired tab is shown (for example,
Rad io) .
@ lil Button
-Opening /closing the submenu : press the~
button.
® Left thumbwheel
-Selecting a function in a menu/list : tur n the
left t humbwheel to the desired function (for
examp le, select ing a frequency).
- Confirming a selection : press the left thumb­
wheel.
- Zooming in/out on the map : when a map is
disp layed, turn the left thumbwheel to zoom i n
and out on the map.
- Quick scrolling through lists : tur n t he le ft
thum bwhee l quickly .
Additional function buttons
Applies to: vehicles wit h mult ifunct ion stee rin g w hee l
Fig. 7 Rig ht s ide of t he mult ifun ctio n stee rin g wheel
11

Cockpit overv iew
(D G!J Button
- Repeating th e la st na vig ation prom pt :
press
the
[J] button.
- Changing the voice guidance volume : turn the
right thumbwhee l up o r down dur ing vo ice
guidance.
@ 51 Button
- Switching the voi ce reco gnition syste m* on :
press the 5J button briefly on the multifun c­
tion s teer ing whee l. Say the desired command
after the
Beep.
- Switc hing th e voice re cogniti on sys tem * off :
press and hold the 51 butto n. Or : say the com­
mand
Cancel.
For mo re information abo ut the vo ice recog nition
system, see
¢ page 142.
@ Right thumbwheel
You can adjust the vo lume of an audio source or a
system message (for example, from the voice recognit ion system*) when the sound is playing.
- In crea sin g or d ecreasing the volume : turn the
right thumbwhee l up or down .
-Mut ing o r pausing : turn the right thumbwheel
down.
Or : press the right thumbwheel.
-Un mut ing o r resum ing : turn the right thumb­
whee l up .
Or: press the right thumbwheel.
© Manua l shift ing
See q page 86.
Driver information
system
On-board computer
F ig . 8 Instrument cluster: fuel consumpt ion d isplay
12
You can call up the fo llowing info rmat ion in the
on-board computer:
- Da te
- Dr iv ing t ime from the short-te rm memory
-Average consumption from the short -term
memory
- Average speed from the short-term memory
- Distance driven from the short-term memory
- Current fuel consumption
- Short-term memory overv iew
- Long -te rm memory overv iew
The short-term memory collects drivi ng informa­
tion from the time the ignition is switched on un­
ti l it is switched off . If you continue driving with­
i n two hours after switch ing the ignit ion off, the
new values are included when ca lculating the cur­
rent trip information.
Un like the sho rt -term memory, the long-term
memory is not erased automatically. You can se­
l ect the time period for evaluating trip informa ­
tion yourself .
Fuel consumption
The current f uel consumption can be shown us­
i ng a bar graph ¢
fig. 8. The average consump­
tion stored in the short-term memory is also d is­
played. If the bar is green, your vehicle is sav ing
fuel through one of the following functions :
-Rec uperation : electrical energy can be stored in
the vehicle battery when the vehicle is coast ing
or driving down hill. T he bar will move toward
0.
-Cy linder on demand system*: the engine auto­
matically switches four cylinders (4 .0L TFSI) or
six cylinders (6.3L FSI) off when lower power
output is required and other conditions are
met. Th is change is not noticeable to the pas­
sengers . The cylinders w ill switch on aga in
when higher power output is needed .

lL t:0 ....
"' ......
"' .... 0 0 :c ' Electromechanical
parking brake
Fig. 94 Center console: parking brake
Your vehicle is equipped with an electromechani ­
cal parking brake ®
i=)fig. 94. The parking brake
is designed to prevent the vehicle from rolling
unintentionally and replaces the hand brake.
Setting/manually releasing the parking
brake
.. Pull the C®> switch to set the parking brake. The
LED in the switch turns on. The
-(USA mod­
els) . (Canada models) indicator light also
turns on in the instrument cluster display.
.. To release the parking brake manua lly, press
the brake or acce lerator pedal while the igni­
t ion is switched on and press
the(®) switch at
the same time. The LED in the button and the
indicator light in the display turn off.
Releasing the parking brake automatically
Requirement: the driver's door must be closed,
the driver's safety belt must be latched and the parking brake must be set.
.. To start driving and release the parking brake
automatically, press the accelerator pedal as
usual.
In addition to releasing the parking brake auto­
matically, other convenience and safety functions
are available when you start driving
i=)page 82,
Starting to drive.
Preventing the automatic parking brake
release
The vehicle could begin rolling unintentionally,
depending on the hill or if towing a trailer.
Driving
.. To prevent the parking brake from releasing au­
tomatically, pull and hold the<®> switch and press the accelerator pedal. The parking brake
remains set and prevents the vehicle from roll­
ing backward .
.,. You can release the<®> switch again once you
are sure that you are giving enough driving
force to the wheels by pressing the accelerator
pedal.
Emergency braking function
You can use the emergency braking function in an
emergency situation, or if the standard brake op­
eration malfunctions or is disabled.
.. Pull and hold the<®> switch.
.. As soon as you release the <®> switch or acceler-
ate, the braking stops.
Pulling and ho lding
the(®) switch while driving
the vehicle activates the emergency braking func­
tion. The vehicle is braked at all four wheels by activating the hydraulic brake system. The brak­
ing effect is similar to heavy braking
i=) ,& .
To reduce the risk of activating the emergency
braking by mistake, a warning tone (buzzer)
sounds when the
<®l switch is pulled. Emergency
braking stops as soon as
the© switch is released
or the accelerator pedal is pressed.
Parking
.. Press the brake pedal to stop the vehicle.
.. Pull the<®> switch to set the parking brake .
.,. Select the P selector lever position .
.,. Turn the engine off i=) ,&.
.,. Turn the steering wheel when parking on in­
clines so that the wheels w ill roll into the curb
if the vehicle starts moving.
8_ WARNING
-Do not press the acce lerator pedal inadver­
tently if a gear is selected when the vehicle
is stationary and the engine is running. Oth­
erwise, the vehicle will start to move imme­
diately and this could result in an accident.
-Eme rgency braking should only be used in
an emergency, when the normal brake pedal
has failed or the brake pedal is obstructed .
.,.
81

Intelligent Technology
you into taking risks. T his could increase
your risk of a co llision.
- Please note the risk of a co llision increases
when driving fast, especially through curves
and on slippery or wet roads, and when driv­
ing too close to objects ahead. The ESC and
its integrated systems cannot always pre­
vent collisions - there is still a risk of acc i­
dents!
- Press the accelerator pedal carefully when
acce lerating on even, slippery surfaces such
as ice and snow. The drive wheels can spin
Switching on and off
even when these control systems are instal­
led and this can affect driving stability and
increase the risk of a collision.
(D Tips
- Th e ABS and ASR only function correct ly
when a ll four wheels have a simi lar wear
condition. Different tire sizes can lead to a
reduction in engine power.
- You may hear noises when the systems de­
scribed are working.
ESC turns on automatically when you start the engine .
Fig . 152 Center conso le wit h ESC O FF but ton
ESC levels
Sport mode on
The following examples are unusual situations
where it may make sense to switch sport mode
on in order to allow the wheels to sp in:
- Rocking the ve hicle to free it when it is stuck
- Driving in deep snow or on loose ground
- Dr iv in g with snow chains
Sport mode off
Behavior
The ESC and ASR stabilization functions The full stabilization function of the ESC
are limited
¢ .&. . and ASR is ava ilable aga in .
Operation Press th e @ button. Press the@button again.
Indicator II turns on. II turns off .
lights
Messages Stabilization control (ESC): Off Warning! Stabilization control (ESC): On
Reduced stability
A WARNING
Only switch sport mode on when your driving
abilities and the traffic s ituation permit, be­
cause there is a risk of s liding.
- The stabilization function is l im ited when
sport mode is sw itched on. The driving
whee ls could spin and the veh icle could
swerve , espec ially on slic k or slippery road
s urfac es.
128
0) Tips
Sport mode cannot be switched on if the
cruise control system* or adaptive cruise con­
trol* is switched on .

u. co .... N
" N .... 0 0 :c ' The steering wheel will be easy to move after
starting the engine. Re-initialization might be
necessary if the steering whee l was moved hard
to the left and right while the vehicle was not
moving . The display turns off if the initia liz ation
was successful.
(D Tips
- If the . or l;:r-ij indicator light only stays on
for a short time, you may continue driving.
-The dynamic steering stability systems
<=>page 127 are not available in the event of
a system malfunction.
-For additional informat ion on dynamic
steering, see
<=> page 111.
ALL wheel drive (quattro)
In all wheel drive, all four wheels are powered .
General information
In all wheel drive, the driving power is divided be­
tween a ll four wheels . This happens automatical ­
ly depending on your driving behavior as well as
the current road conditions. Also see
<=> page 12 7, E lectronic Stabilization Control
(ESC) .
With the sport differential*, power distri­
bution to the rear wheels is variable and can be
adjusted using the drive select
<=>page 111.
The all wheel drive concept is designed for high
engine power . Your vehicle is exceptionally pow­
erful and has excellent driving characterist ics
both under normal driving conditions and on
snow and ice. Always read and follo w safety pre ­
cautions<=>.&. .
Winter tires
By using all wheel drive, your vehicle has good
forward mot ion with standard tires in winter con­
ditions. However, in winter we recommend using
winter or all season tires on all four wheels, be­
cause this will improve the braking effect.
Snow chains
If there are snow cha in laws, snow chains must
a lso be used on vehicles with all wheel drive
<=> page 298, Snow chains .
Intelligent Technology
Replacing tires
For vehicles with all wheel drive, only wheels with
the same rolling circumference should be used.
Avoid using tires with different tread depths
<=> page 2 90, New tires or wheels.
Offroad vehicle?
Your Audi is not an offroad vehicle -there is not
enough ground clearance. For this reason, avoid
difficu lt terrain .
A WARNING ~ -
-Also, in vehicles with all whee l drive, adapt
your driving style to the current road and
traffic cond itions. Do not let the increased
safety prov ided tempt you into taking r isks,
because this increases the risk of an acci ­
dent.
- The braking ability of your vehicle is limited
to the traction of the wheels. In this way, it
is not different from a two wheel drive vehi­
cle. Do not be tempted to accelerate to a
high speed when the road is slipp ery, be­
cause this incr eases the risk of an accident.
- Note that on wet streets, the front wheels
can "hydrop lane" if dr iv in g at speeds that
are too high . Unlike front wheel drive
vehicles, the engine does not rev higher sud­
den ly when the vehicle begins hydroplaning.
For this reason, adapt your speed to the
road conditions to reduce the risk of an acci­
dent.
Energy management
The starting ability is optimized
The energy management system manages the
electrical energy distribution and optimizes the
availability of electrical energy for starting the
engine.
When a vehicle with a conventiona l energy sys­
tem is not driven for a long t ime, the vehicle bat­
te ry is drained by equipment (for example, the
immobilizer). In certain circumstances, there
cou ld may not be enough energy to start the en-
gine.
.,.
131

Wheel s
Occupant loading and distri­
bution for vehicle normal load
for various designated seating
capacities
Refer to the tire inflation pres­
sure
label ¢ page 293, fig . 267
for the number of seating posi­
tions . Refer to the
table¢ table
on page 295
for the number of
people that correspond to the ve­
hicle normal load .
New tires or wheels
Audi recommends having all work
on tires or wheels pe rformed by
an authorized Audi dealer or au­
thorized Audi Service Facility .
T hese facilities have the proper
knowledge and are equipped with
the required tools and replace ­
ment parts.
.,. New tires do not yet have the
optimum gripping properties. Drive carefully and at moderate
speeds fo r the first 350 miles
(500 km) with new tires .
.,. Use tires of the same construc ­
tion, size (rolling circumference)
and as close to the same tread pattern as poss ible on all four
wheels .
290
.,.Do not replace tires individually .
At least replace both tires on the
same axle at the same time.
.,. Audi recommends that you use
Audi Original Tires. If you would like to use different tires, please
note that the tires may perform
differently even if they are the
same
size¢ ,&.
.,. If you would like to equip your
vehicle with a tire/rim combina ­
tion that is different from what
was installed at the factory, con­
sult with an authorized Audi
dealer or authorized Audi Service
F acility before making a pur­
chase ~ &-
The spare tire* is different from
the regular tires installed on the
vehicle - for example, if winter
tires or wide tires are installed -
so only use the spare tire* tempo ­
rarily in case of emergency and
drive carefully while it is in use. It
should be replaced with a regular
tire as soon as possible.
All four wheels must be equipped
with tires that are the same brand and have the same construction
and tread pattern so that the
drive system is not damaged by
different tire speeds. For this rea-
son, in case of emergency, only
.,.

Wheels
the available cargo and lug­gage load capacity of your vehi­
cle.
.,.Check the tire sidewall
(¢ page 283, fig. 264) to deter­
mine the designated load rating
for a specific tire.
Wheel bolts and rims
Wheel bolts
Wheel bolts must be clean and loosen/tighten
easily .
Rims
Rims with a bolted rim ring* or with bolted wheel
covers* consist of multiple pieces . These compo­
nents were bolted together using special bolts
and a special procedure. You must not repair or
disassemble
them £:=?.&. .
A WARNING
Wheel bolts that are tightened or repaired in­
correctly can become loose and result in loss
of vehicle control, which increases the risk of
an accident. For the correct tightening specifi­
cation, see
¢page 314.
- Always keep the wheel bolts and the
threads in the wheel hub clean and free of grease.
- Only use wheel bolts that fit the rim.
- Always have damaged rims repaired by an
authorized Audi dealer or authorized Audi
Service Facility. Never repair or disassemble
rims yourself, because this increases the risk
of an accident .
Winter tires
Winter tires significantly improve the vehicle's
handling when driving in winter conditions. Be­
cause of their construction (width, compound,
tread pattern) , summer tires provide less trac­
tion on ice and snow.
298
.. Use winter tires on all four wheels .
.. Only use winter tires that are approved for your
vehicle.
.. Please note that the maximum permitted
speed may be lower with winter
tires¢ _&.. An
authorized Audi dealer or authorized Audi Serv ­
ice Facility can inform you about the maximum
permitted speed for your tires .
.,. Check the tire pressure after installing wheels
¢page 293 .
The effectiveness of winter tires is reduced great­
ly when the tread is worn down to a depth of
0.157 in (4 mm). The characteristics of winter
tires also decrease greatly as the tire ages , re­
gardless of the remaining tread.
A WARNING
- Never drive faster than the maximum per­
mitted speed for your tires. This could cause
the tires to heat up too much. This increases
the risk of an accident because it can cause
the tire to burst .
- Always adapt your driving to the road and
traffic conditions. Drive carefully and reduce
your speed on icy or slippery roads. Even
winter tires can lose traction on black ice .
® For the sake of the environment
Reinstall summer tires at the appropriate
time, because they provide better handling
when roads are free of snow and ice. Summer
tires cause less road noise, tire wear and fuel
consumption.
(D Tips
You can also use all season tires instead of
winter tires. Please note that in some coun­
tries where winter tires are required, only
winter tires with the
& symbol may be per­
mitted.
Snow chains
-
Snow chains not only improve the driving in win­
ter road conditions, but also the braking.
.,. Only install snow chains on the front wheels. .,.

lL t:0 ....
"" ......
"" .... 0 0 :c ' Your vehicle has also been equipped with a TPM S
malfunction indicator to indicate when the sys­
tem is not operating properly. The TPMS mal­
function indicator is combined with the low tire
pressure telltale. When the system detects a
malfunction, the telltale will flash for approxi­
mately one minute and then remain cont inuously
illuminated . This sequence will continue upon
subsequent vehicle start-ups as long as the mal­
function ex ists.
When the malfunction indicator is illuminated,
the system may not be ab le to detect or signal
low tire pressure as intended . TPM S malfunctions
may occur for a var iety of reasons, including the
installation of replacement or alternate tires or
wheels on the vehicle that prevent the TPMS
from functioning properly. Always check the
TPMS malfunction telltale after replacing one or
more tires or wheels on your vehicle to ensure
that the replacement or alternate tires and
wheels allow the TPMS to continue to function
properly.
If the Tire Pressure Monitoring System
indicator appears
Applies to: AS, 58
The tire pressure indicator in the instrument
cluster informs you if the tire pressure is too low
or if there is a system malfunction .
Fig. 268 Instrument clus ter: indicator light with message
Using the ABS sensors, the tire pressure monitor­
ing system compares the tire tread circumfer­
ence and vibration characteristics of the individu­
al tires . If the pressure changes in one or more
tires, this is ind icated in the instrument cluster
display with an indicator light
ti] and a message .
Wheels
If only one tire is affected, the location of that
tire will be indicated.
The tire pressures must be stored in the Infotain­
ment system again each time the pressures
change (switching between partial and full load
pressure) or after changing or replacing a tire on
your vehicle
c:> page 302. The tire pressure mon i­
toring system only monitors the tire pressure you
have stored. Refer to the tire pressure label for
the recommended tire pressure for your vehicle
c:> page 293, fig . 267 .
Tire tread circumference and vibration character­
istics can change and cause a tire pressure warn­
ing if :
- the t ire pressure in one or more tires is too low
- the tire has structural damage
- the tire was replaced or the tire pressure was
changed and it was not stored
c:> page 302
- the spare tire* is installed
Indicator lights
ti] Loss of pressure in at least one tire c:> ,&..
Check the tires and replace or repair if necessary.
Check/correct the pressures of all four tires and
store the pressure again in the Infotainment sys­
tem
c:>page 302.
mm ( T ire Pressure Monitor ing System) Tire
pressure: System malfunction!. Ifm:m appears
after switching the ignition on or while driving
and the
ti] indicator light in the instrument clus­
ter blinks for approximately one minute and then
stays on, there is system malfunction. Try to
store the correct tire pressures
c:> page 302. If
the indicator light does turn off or turns on again
after a short period of time, drive to an author­
ized Audi dealer or authorized Audi Service Facili­
ty immediately to have the malfunction correct­ ed .
.&, WARNING
- If the tire pressure ind icator appears in the
display, reduce your speed immediately and
avoid any hard steering or braking maneu­
vers. Stop as soon as possible and check the
tires and their pressure.
..,.
301