2018 AUDI A8 check engine

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" N .... 0 0 :c ' Warm and cold Deluxe automatic
climate control
Description
The climate control system warms, cools and re ­
moves humidity from the air in the vehicle interi­
or. It is the most effective when the windows and
sunroof* are closed. If there is a build-up of heat inside the vehicle, ventilation can help to speed
up the cooling process .
In all heating mode functions, except for defrost,
the blower only switches to a higher speed once
the engine coolant has reached a sufficient tem­
perature .
Pollut ant filt er
The po llutant filter removes pollutants such as
dust and pollen from the air.
Ke y r eco gnition
The climate control settings are a utomatically
stored and assigned to the remote control key
that is in use .
A WARNING
Poor visibility can lead to accidents.
- For safer driving, keep all windows free of
ice, snow and fog .
- Become familiar as quickly as possible with
the correct use and function of the climate contro l system, especially with the defrost­
ing and defogging function.
- When the temperature is below freezing,
only use the windshield washer system after
Warm and c old
the windshield has been warmed by the cli­
mate control system. The washer fluid could
freeze on the windshield and impair visibili­
ty .
@ Note
-If you suspect that the climate contro l sys­
tem is damaged, switch the system off to
prevent further damage and have it checked
by an authorized Audi dealer or authorized
Aud i Serv ice Facility.
- Repa irs to the Aud i climate control system
require special technical knowledge and
special tools . See an authorized Aud i dealer
or authorized Audi Serv ice Fac ility .
@ For the s ake of the environment
Reducing the amount of fuel used also re­
duces the amount of pollutants that enter the
a ir .
(D Tips
- To prevent interference with the heat ing
and cooling output and to prevent the win­
dows from fogging over, the a ir intake in
fro nt of t he w indshie ld must be free of ice,
snow or leaves.
- Condensat ion from the coo ling system can
dr ip and form a pudd le of water under the
veh icle . T h is is no rma l and does not mean
there is a leak .
- Th e energy management system may tem­
porarily switch off certain functions, suc h as
the seat heating* or rear window defogger .
T hese systems are avai lable again as soon
as the energy supply has been restored.
69

Drivin g
-Avoid driving through sa lt water, because
this can cause corrosion .
Economical and environmentally-friendly
driving
The amount of fuel consumption, the env iron­
mental impact and the wear to the engine,
brakes and t ires depends mostly on your dr iv ing
style. W it h an anticipatory and economic dr iv ing
style , fu el consumption can be reduced by ap ­
p roximate ly 10 -15% . The following tips wi ll help
you conserve the environment and your money at the same time .
Anticipatory driving
A veh icle uses the most fuel when acce le rating.
When you dr ive with ant ic ipat io n, you do no t
need to brake as often and so you accelerate less .
When possib le, let your vehicle coast with a
gear
eng aged ,
for example, when you notice that the
next traffic light is red. This produces an engine
braking effect, which helps to protect the brakes
and tires and reduces the emissions and fuel con­
sumpt ion to zero (fuel shut -off during decelera­
tion) .
Shift efficientl y
Upshifting earlier is an effective way to save fuel.
Staying in a gear too long uses fue l unnecessari­
ly . Press down on the accelerator pedal slowly
and avoid "k ick-down" .
Avoid full accel eration
You shou ld rare ly trave l at the maximum vehicle
speed. High speeds cause a disproportionately h igh increase in fuel consumption, emissions and
traffic no ise . Slower driving saves fuel.
Reduce idlin g time
The Start/Stop system* he lps to reduce the idling
time automatically. In vehicles without the Start/
Stop system*, it is efficient to switch the eng ine
off when stopped at ra ilroad crossings and long
red l ights . Stopp ing the engine for 30 -40 sec­
onds already saves more fuel than the amount of
ext ra fuel needed to resta rt the eng ine.
74
It takes a ve ry long time in id le to warm the en­
gine up to operating temperature. Wear and
emissions are especially high in the warm -up
phase. Therefore, you shou ld begin driving im­
med iate ly after starting the engine. Avoid high
RPMs while doing this .
Hav e maintenance perfo rmed regul arly
By having maintenance performed reg ularly on
your vehicle, you can help to reduce fuel con­
sumption before you even start to drive. The maintenance condition of your vehicle not on ly
affects traffic safety and long-term value but al­
so impacts fuel consumpt ion. A poorly main­
ta ined engine can lead to fuel consumpt ion that
i s 10% hig he r th an no rma l.
Avoid short trip s
The engine and exhaust cleaning system must
reach their optimal operat ing temperature to ef­
fect ively reduce consumpt ion and emissions .
A cold engine uses a d isproportionately high
amount of fuel. The engine reaches operat ing
temperature and consumption normalizes only
after approximately 2 .5 m iles (4 km) .
Check the tire pressu re
To save fue l, make sure the t ires are always in­
flated to the correct pressure
¢ page 291. The
fuel consumpt ion can increase by 5% if the pres­
sure is only 0 .5 bar too low . Due to the increased
r oll ing resistance, low tire p ressures w ill also
l ead to greater tire wear and will affe ct driv ing
behav ior.
Drive w ith summer tires when poss ible because
t hi s can increase fue l economy by up to 10% .
Eliminate unnecessary weight
Since every pound of extra weight increases fuel
consumption, it pays to remove any unnecessary
weight.
A roof rack increases the w ind resistance on the
vehicle and shou ld be removed when it is not
needed. You will save approximately 12% of your
fuel when at speeds from 62-75 mph (100-120 km/ h).
.,.

Driving
-If physica l limitations prevent you from sit­
t ing 10 in (25 cm) or more from the steer­
ing wheel, check with your authorized Audi
dealer to see if adaptive equ ipment is avail­
able .
-If the steering wheel is aligned with your
face, the supp lemental driver's airbag can­
not prov ide as m uch protection in an acci­
dent. A lways make s ure that the steering
wheel is aligned w ith your che st.
-Always hold the steer ing whee l with your
hands a t the 9 o' clock and 3 o'clock pos i­
t ions to reduce the ris k of person al injury if
the driver 's airbag deploys.
-Never hold the s teer ing whee l at the 1 2
o'clock pos it io n or w ith your ha nds inside
the steering wheel rim or on the steer ing
wheel hub . Holdi ng the steering whee l the
wrong way can cause serious injuries to the hands, arms and head i f the driver's airbag
deploys.
Entry assistance
Easy seat entry makes it easier to enter and exit
the vehicle by adjusting the steering column au­
tomatically.
• In the Infotainment system, select the ! CARI
funct ion b utton > Car systems contro l button >
Vehicle settings > Seats > Drive r's seat > Easy
seat entry > On .
When easy seat entry is switched on, the stee ring
column goes back up into the park position when
the ignition is switched off. After entering the ve­
h icle, the steering co lumn returns to the stored
position once the ignition is sw itched on .
76
Starting and stopping
the engine
Starting the engine
The ! START ENGINE S T OPI button switches the
ignition on and starts the engine.
Fi g. 90 Ce nter conso le: STAR T ENGINE S TOP but ton
Switching the ignition on /off
• To switch t he ign it ion on or off, press the
! S TAR T ENGINE STOPI button . Do not press the
brake pedal while do ing this.
St arting the engine
• Press the brake pedal¢ &_.
• Press the I START ENGINE STOP I button
¢ fig. 90 . The eng ine will start .
If the engine does not start immediately, the
start ing procedure stops automat ica lly after a
sho rt time . Repeat the sta rting process .
Start/Stop syst em
See the information in ¢ page 78, Start/Stop
system.
A WARNING
To reduce the risk of poison ing, never allow
the eng ine to run in co nfined spaces .
(D Note
Avoid high engine spee d, full throttle, and
h eavy engine load if the engine has not
reached operat ing temperat ure yet . You could
-
damage the eng ine. .,..

lL t:0 ....
"' " "' .... 0 0 :c ' cannot steer and brake as you usually
would, th is could lead to accidents and ser i­
ous injuries .
- To reduce the risk of injuries, make sure that
the Start/Stop system is turned off when
working in the engine compartment
i=> page80 .
(D Note
Always switch the Start/Stop system off when
driving through water
i::> page 80.
Starting/stopping the engine
App lies to: ve hicles with Start/Stop system
Fig. 92 Instrument cluste r: eng ine sw itched o ff (stop
p hase)
~ S low the vehicle to a stop us ing the brake and
keep pressing the brake pedal. The engine w il l
switch off. The
II indicator light appears in the
informa tion line in the instrument cluster dis­
play.
~ When you take your foot off the brake peda l,
the engine restarts. The indicator lig ht turns
off .
Additional information
The engine w ill switch off in the P, D, N and S po­
sitions as we ll as in manual mode . In the P posi ­
tion, the engine will also remain off if you take
your foot off the brake pedal. The engine starts
again when you se lect another selector lever po­
sition and take your foot off the brake pedal.
I f you select the R pos ition during a Stop phase ,
the engine will start again.
Shift from D to P quickly to p revent the engine
from star ting unintentionally when shifting
through R .
Drivi ng
You can de termine for yourse lf if the engine w ill
stop or not by reducing or increasing the amount
of force you use to press the brake pedal. For ex ­
amp le, if you only lightly press on the brake ped­
al in stop-and-go traffic or when turning, the en­
gine will not switch off when the vehicle is sta ­
t io nary . As soon as you press the brake down
harder, the engine w ill switch off .
(D Tips
-Press the brake pedal during a Stop phase
t o keep the vehicle from rolling .
- The ignit ion w ill turn off if you press the
! S T ART ENGINE STOPI button du ring a stop
phase.
General information
Applies to: vehicles w ith Start/Stop system
The standard Start/Stop mode can be canceled
for various system-related reasons.
Eng ine doe s not switch off
Before each stop phase, the system checks if cer ­
tain conditions have been met . If the
r,J indica­
tor light appears in the instrument cluster dis­
play, the eng ine will not be stopped, for example
in the following situations:
- The engine has not reached the minimum re­
quired temperature for Start/Stop mode.
- T he interior temperature selected by the cli-
mate control system has not been reached.
- The outside temperature is extremely high/low.
-The winds hie ld is being defrosted
~ page 71.
-The parking sys tem* is switched on .
- The vehicle battery cha rge level is too low .
- The steering wheel is tu rned at a sha rp angle or
is moving.
- After engaging the reve rse gear .
- On sharp incl ines.
Eng ine automatically restarts
T he standard Start/Stop mode wi ll be canceled
during a stop phase in the following situat ions .
The eng ine restarts without any action by the
driver .
79

Trailer towing
Trailer load distribution
Be sure the load in the trailer is held securely in
p la ce to prevent it from shifting forward, back­
ward or sideways .
Never allow a passenger to ride in a trailer~&.
in Driving instructions on page 91.
Engine cooling system
Towing a trailer makes the engine work harder . It
is important that the coo ling system's perform­
ance is up to t he additional load. Make sure that
the cooling system has eno ugh fluid .
Tire pressure
When tow ing a tra iler, inflate the tires of your
veh icle to the tire pressure listed under "Full
load " on the label
~ page 293. Inflate trailer
tires to trailer and tir e ma nufactu rers' specifica­
tions.
Lights
Check to make sure both vehicle and trailer lights
are working properly .
Safety chains
Be sure trailer safety chains are proper ly connect­
ed from the trailer to the hitch on the vehicle.
Leave enough slack in the chains to permit turn­
ing corners . When you install safety cha ins, make
sure they w ill not drag on the road when you are
driving.
The chains should cross under the trailer tongue
to prevent it from dropping in case of separation
from the hitch .
Adjusting the Audi drive select
Make sure the vehicle is on a level surface before
hitching up the trailer and before adjust ing the
tongue we ight. The vehicle must be in
auto or
comfort driving mode and not ra ised
~ page 111, ~0 .
Make sure that the vehicle is lowered. In Info­
tainment, select:
ICARI function butto n> Lower
control button.
90
If you must drive under poor road conditions, you
can raise the ve hicle
after coupling the trailer or
after adjust ing the tongue we ight ~ page 113.
@ Note
-Changes in temperature or load can aff ect
the height of the vehicle .
-Always select auto or comfort mode. Other­
wise, the tong ue load specified for your ve­
hicle will no longer be applicab le .
Driving instructions
Driving with a trailer always requires extra care
and consideration.
Weight distribution
Towing a loaded trailer with an empty car results
in a hig hly unstable distribution of we ight. If th is
cannot be avoided, drive at very low speeds only
to avoid t he risk of losing steering contro l.
A "balanced" rig is eas ier to operate and control.
This means that the tow vehicle s hould be loaded
to
the extent possible and permissib le, w hil e
keeping the trailer as light as possible under the
circumstances. Whenever possible, transfer
some cargo to the luggage compartment of the
tow veh icle while observing tongue load require­
ments and vehicle loading considerations.
Speed
The higher the speed, the more difficu lt it be ­
comes for the driver to control the rig . Do not
drive at the maximum permissible speed. Reduce
your speed even more if load, weather or wind cond it ions are unfavorable - particularly whe n
go ing down hill.
Reduce vehicle speed
immediately if the trailer
shows the slightest sign of sway ing.
Do not try
to stop the swaying by accelerating.
Observe speed limits. In some areas, speeds for
vehicles towing trailers are lower than for regular
vehicles.
A lways apply brakes early. When driving down­
hill, shift into a lower gear to use the engine
braking effect to slow the vehicle. Use of the
brakes alone can cause them to overheat and fail.
ll-

Intellig ent T echn olo gy
- New brake pads do not achieve their full
braking effect during the first 250 mi
(400 km). They must be "broken in" first.
However, you can compensate for the
sl ightly reduced brak ing force by pressing
firmly on the brake pedal. Avoid heavy brak­
i ng dur ing t he break- in per iod.
- Certa in weather and operat ing cond it ions
such as dr iv ing through water, driving in
heavy ra in or driving after washing your ve ­
hicle can impair the effectiveness of the
brakes . In the winter, ice may build up on
the brake pads, rotors and drums . Check
these components by braking carefu lly. Ap­
plying the brakes carefully severa l times
dr ies the brakes and removes ice bu ild-up.
- The effic iency of the brakes can also be im­
paired by driving for long stretches on roads
covered w ith salt w ithout using the brakes.
You can remove salt deposits from the brake rotors and pads by carefully applying
the b rakes severa l t imes .
- If the front spo iler is damaged or you install
another spoiler, make sure the front wheel
bra kes are vent ilated properly. Otherwise,
the brake system could ove rheat, w hich re ­
duces the ir effectiveness.
- Failure of a b rake circuit impa irs b raking
perfo rmance, which inc reases brak ing dis ­
tance . Avoid driving the vehicle and have it
towed it to the nearest authorized Audi
dealer or authorized Audi Service Facility .
- If the brake booster is not working, you will
have to press m uch harder on the brake
peda l to compensate for the lack of the
booster.
@ Note
- Never let the brakes " rub" by pressing the
pedal light ly when braking is not actually
necessary. This causes the brakes to over­
heat and increases braking distance and
causes wear.
- Before driving downhill a long distance on a
steep hill, decrease your speed and select a l ower gear. This makes use of the engine
braking effect and relieves the brakes. If
130
you need to brake add itiona lly, brake in in­
terva ls and not continuous ly .
(D Tips
- If the bra ke boos ter is not wor king, you
must press the brake peda l with much more
force than normal.
- If you retrof it your vehicle with a front spoi l­
er, wheel covers or simi lar items, make sure
that the air flow to the front wheels is not interrupted. Otherwise the brake system
can become too hot.
Electromechanical
steering, dynamic
steering
The electromechonicol steering supports the
driver's steering movements.
Power steering adapts electronically based on
the vehicle speed .
Indicator lights and messages
• Do not drive vehi cle: S tee rin g defect ive
If this indicator light turns on and stays on and
th is message appears, the power steering may
have failed .
Stop the vehicle in a safe location as soon as pos­
s ible. Do
not conti nue driving. See an authorized
Audi dealer or authorized Audi Service Fac il ity for
ass istance.
l;rfl St ee ring: System faul t You ca n cont inue
dr ivi ng
If the indicator light turns on and the message
appears, the steering wheel may be more diffi­
cu lt to move or more sensitive than usual. The
steering wheel may also be at an angle when driv ing stra ight .
Drive slowly to an authorized Audi dea ler or au­
thori zed Audi Serv ice Facility to have the mal­
funct io n corrected.
'-r-ij Dynamic stee ring: Init ializing
If the indicato r light is blinking and this message
appears, dynamic steering* is being initialized.
IJ>-

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The last selected menu is displayed when it is
switched on.
When the ignition is switched off, a message in­
d icat ing that the RSE is in standby mode appears
in the left or right RSE display. The RSE switches
off automatically if you do not press the left or
right On/Off knob while the system is in standby
mode.
(D Tips
- The RSE switches off automatically if the
engine is not running and the vehicle bat­
tery is low.
Symbols
Applies to: vehicles with Rear Seat Enter tainment
Fig. 203 RSE display symbols
Symbol/Description Explanation
Rear Seat Entertainment
- If you cannot switch the RSE on again, check
the parental control settings in the MMI
¢page 197.
Adjusting the volume
Applies to: vehicles with Rear Seat Entertainment
.,. Increasing or decreasing the volume: turn the
On/Off knob to the right or left .
.,. Muting : press the On/Off knob brief ly.
.,. Unmuting: press the On/Off knob briefly or
turn the On/Off knob to the right .
(D Tips
Volume that is too high or too low is auto­
matically adjusted to a preset level when the
RSE is switched on.
CD ~ Active media source
0 Headphones Aud
io output through headphones that are wireless or connected
by a cable
® Speaker Audio output through the vehicle's audio system
@ Importing process Copy audio/video files to the Jukebox ¢
page 183
® Time Set time
® Parental control Parental control is switched on¢ page 197
0 L/R Display for RSE when RSE control panel is act ive
@ Tips
~ A headphone or speaker symbol that is
~ crossed out@/@ ¢ fig. 203 indicates that
...... o the active audio/video source is muted. 0 :c ' 195

Checking and Filling
Checking and Filling
Gasoline
Fuel supply
Applies to: vehicles with gasoline engine
Using the right fuel helps keep the environment
clean and prevents engine damage .
Fuel recommendation
The fuel recommended for your vehicle is unlead­
ed premium
grade gasoline . Audi recommends
using TOP TIER Detergent Gasoline with a mini­
mum octane rating of91 AKI (95 RON). For more
information on TOP TIER Detergent Gasoline,
please go to the offic ial website
(www.toptiergas .com).
The recommended gasoline octane rat ing for
your engine can also be found on a label located
on the ins ide of the fuel filler flap. This rating
may be specified as AK I or RON .
Your veh icle may also be operated using unlead­
ed regular gasoline with a minimum octane rat ­
ing of 87 AKl/91 RON . However, using 87 AKI/91
RON octane fuel w ill slightly reduce engine per­
formance.
Use unleaded gasoline only. Unleaded gasoline
is available throughout the USA, Canada, and in
most European countries. We recommend that
you do not take your vehicle to areas or count ries
where un leaded gasoline may not be available.
For more information on refueling your vehicle,
see
~ page 269 .
Octane rating
Octane rating indicates a gasoline's ability to re­
sist engine damaging "knock" caused by prema­
ture ignit ion and detonation . T herefore, buy ing
the correct grade of gasoline is very important to
he lp prevent possible engine damage and a loss
of eng ine pe rformance.
Gasoline most commonly used in the United
States and Canada has the following octane rat­
ings that can usually be found on the filler pump:
- Premium Grade: 91 - 96 AKI
268
-Regular Grade: 87 -90 AK I
Explanation of the abbreviations :
AKI =
Anti Knock Index = (R +M)/2 = (RON +MON)/
2
RON = Research Octane Number
MON= Motor Octane Number.
@ Note
- Do not us e any fuel with octane ratings low­
er than 87 AKI or 91 RON otherwise expen­
sive engine damage will occur .
- Do
not us e leaded gasoline. The use of lead­
ed gasoline will severely damage your vehi ­
cle's catalytic converter and its ability to
contro l exhaust emissions .
Blended gasoline
Applies to: vehicles with gasoline engine
Use of gasoline containing alcohol or MTBE
(methyl tertiary butyl ether)
You may use unleaded gasoline blended with al­
cohol or MTBE (commonly referred to as oxygen ­
ates) if the blended mixture meets the follow ing
criteria :
Blend of gasoline methanol (wood alcohol or
methyl alcohol)
-Anti -knock index must be 87 AKI or higher.
- Blend must contain no more than 3% metha-
nol.
- Blend must contain more than 2% co-solvents.
Blend of gasoline and ethanol (grain alcohol or
ethyl alcohol)
- Anti-knock index must be 87 AKI or h igher .
- Blend must not conta in more than 15% etha-
nol.
Blend of gasoline and MTBE
-Anti -knock index must be 87 AK I or h igher.
- Blend must not contain more th an 15% MTBE.
Seasonally adjusted gasoline
Many gasoline grades are blended to perform es­
pecially well for winter or summer dr iv ing . Dur-
i ng seasonal change-over, we suggest that you
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