2016 AUDI A8 check engine

Removing the mechanical key
Fig. 19 R emote control master key: removing the mechani·
ca l key
• Press the release button @¢fig. 19.
• Pull the mechanical key @ out of the master
key.
Using the mechan ica l key, you can:
- lock and unlock* the storage compartment on
the passenger's side¢
page 73.
- lock and unlock the vehicle manually
¢page 35.
-lock the front and rear passenger doors me­
chanically¢
page 36.
-unlock the luggage compartment lid manually
¢page 39.
Check light and battery in the master key
Fig. 20 Remote master key: Remov ing the battery holder
Check light in the ma ste r key
The check light®¢ fig. 20 in the master key
provides information about different conditions.
• The check light turns on briefly once when a
button is pressed, and during an "inquiry" by
the conven ience key system.
Open ing and closing
• If the check light does not come on, the battery
is dead and has to be replaced. In addition,
when the battery is dead the
!I ind icator light
appears in the instrument cluster display as
well as the message
Please change the key
battery .
Ma ster key battery replacement
• Remove the mechanical key ¢page 31.
• Press the re lease button @¢ fig. 20 on the
battery holder and at the same time pull the
battery holder out of the master key in the di­
rection of the arrow .
.. Install the new batte ry CR 2032 with the"+"
sign facing down.
.. Push the battery holder carefully into the mas­
ter key .
.. Insta ll the mechanical key .
@ For the sake of the environment
Dispose of dead batteries properly so as not
to pol lute the environment.
(D Tips
The replacement battery must be the same
specification as the original.
Electronic immobilizer
The immobilizer helps to prevent unauthorized
use of your vehicle.
A computer ch ip inside your key automatically
deact ivates the electronic immob ilizer when the
key is inside the vehicle. When you remove the
key from the vehicle, the elect ronic immob ilizer
is automatically activated once again .
& WARNING
-
Always take the key with you when you leave
the vehicle. The key can disarm the electronic
engine immobilizer and permit an unauthor­
i zed person to start the engine and enable op­
eration of the vehicle systems such as power
window or power sunroof leading to serious
personal injury.
31

Lights and Vision
Lights and Vision
Exterior lighting
Switching the headlights on and off
Fig. 42 Instrument panel : lig ht sw it c h with all -weather
l igh ts
The headlights only wo rk when the igni tion is
sw itched on. Whi le sta rting the engine or when
switching off the ignition, the headlights will go
off and only th e side marker lights will be on.
I f the sys tem i s not operating p roperly, a warning
symbo l in the drive r informat ion d isplay is dis­
p layed
c::> page 21 .
Light switch -'t;f;
T urn the switch ~ fig. 42 to the corresponding
position . When the lights are sw itched on, the
:oo:
symbo l turns on .
0 - The l ights are off or the daytime runni ng
lights are on :
-USA mode ls: The daytime running lights will
come on automatically when the ignition is on
and the light sw itch
c::> fig . 42 is in the O posi­
tion or the
AUTO position (only i n daylight con­
di tions). The
Daytime running li ght s func tion
can be turned on and off in the MM I
c::> page 47, c::> &.
- Canada mo del s: T he daytime runn ing lights
will come on automa tically when the ignit io n is
o n and the light switch
c::> fig . 42 is in the O po­
s ition, the
:oo : pos ition or the AUTO position
(on ly in daylight conditions)
c::> & .
AUTO -Automatic head light s switch on a nd off
depending on br igh tness , for example i n tw ilight,
du ring ra in or in tunne ls
c::> & .
46
:oo : -Side marker lights
gD -Low beam headlig hts
~ - All-weather lig hts
@il -Rear fog lights *. When the rear fog lights are
on, the symbol
0$ on the switch will illuminate .
All-weather lights
The front lights a re adjus ted au toma tica lly so
that you are less likely to see g la re from your own
headlights, for example whe n driving on a wet
road.
Automatic dynamic headlight range control*
Yo ur vehicle is equipped wi th a headlight range
contro l system so that the head lights do not
bl ind oncoming t raffic if the vehicle load
changes. The head light range also adjusts auto­
matically when brak ing and acce lerating .
Light functions
The following ligh t fu nct ions are available de­
pend ing on vehicle e quipment and o nly fu nction
whe n the light switc h is in the AUTO position.
You can deactivate these fu nctions in the M MI
unde r
Audi adapti ve light c::> page 47.
Static cornering light* -the corne ring ligh t
switches on automat ically when the steering
whee l is turned at a certain angle at speeds up to
app roximately 44 mph (70 km/h) and when the
turn s ignal is activated at speeds up to approxi­
ma tely 25 mph (40 km/h) . The area to the side of
the ve hicle is illuminated better when turning .
Dynamic curve light* -the curve light adapts it­
self to the curves in the road .
Highway light fun ction* -this funct ion adapts
the lighti ng for highway d riving based on vehicle
speed .
A WARNING
--Automatic headlig hts are only intended to
assist the driver . They do not relieve the
driver of his responsibi lity to check the
headlights and to turn them o n manually
according to the cur rent light and vis ib ility
co ndi tion s. For example, fog cannot be

© -12 volt socket c:> page 72
@ -Folding table c:> page 68
©-center armrest and storage compartments:
to open the deep compartment, press the rig ht
button and fold the center armrest upward . To
open the compartment fo r the massage funct ion
r emo te contro l*
c:> page 63 and for the tele ­
phone*, press the left button and fo ld the center
armrest upward .
115-volt socket
Applies to: vehicles with 115-volt socket
The 115-vo lt socket can only be used when the
engine is running
c:> & . When you push the con­
nector all the way into the socket, the ch ild safe­
ty mechan ism releases and current flows through
the socket .
Equ ipment th at can be conn ect ed
Electrical devices can be connected to the 1 15
volt socket in the vehicle. Power consumption at
the 115-volt socket must not exceed 150 watts
(300 watts peak) . Check the power consumpt ion
of the equipment on the model plate .
LED on the socke t
-The socket is ready for use when the LED is
green.
- If the LED blinks red, there is a malfunction .
The socket will switch off automatically due to overcurrent or overheating. The socket will
switch on again automatically after a cool­
down period . Any devices that are connected
and switched on will activate again automati­ ca lly
c:> ,& .
A WARNING
- T he so ckets and the electrical accesso ries
conne cted to them operate only when the
ignition is switched on . Incorrect usage can
lead to serious injuries or burns. To reduce
the risk of injuries, never leave children un­
attended in the vehicle w ith the vehicle key.
- Heavy eq uipment or plugs with integrated
power supply units can damage the socket
and lead to injuries.
-
Seat s and sto rage
-Store all connected equipment securely
while the veh icle is moving so that they can­
not be thrown through the vehicle in the
event of a braking maneuver or an accident.
- Never sp ill any liquids on the socket . If any
mo isture gets into the socket, make certain
that all the moisture has dried up before us ­
ing the socket again .
- Equipment that is connected to the vehicle
socket can heat up more than it does when
connected to the public grid .
- When us ing adapters and extens ion cords,
the child safety for the 115-volt socket is
disabled and the socket is live.
- Never insert anyth ing other than the plug of
an app ropr iate electrical accessory into the
soc ket, especially th ings that conduct ele c­
tr icity, e.g. metal pens, knitting need les,
etc. into the contacts of the 115 -vol t sock­
et .
- Turn the electrical equ ipment off if the
socket has switched off because of over­
heating.
(D Note
- Always follow the manufacture r's i nstruc­
tions for a ll electrical accessories yo u wan t
t o use with the e lectr ica l socket!
- Do not connect lamps tha t con tain a neon
t u be. Fo r tech nica l reasons the lamp may be
damaged.
- Do not connect any 230-volt equipment to
t he 115-vo lt socket . The equipment may be
damaged. If necessa ry , check the permiss i­
ble vo ltage for the equipment on the mode l
label.
- In the case of some power packs, e.g. for a
laptop computer , the bui lt-in ove rcurrent
shutoff prevents it from being switched on
because of excessive start-up current. In
this case, disconnect the power pack from the consumer and reconnect it after abo ut
1 0 seconds .
(D Tips
-Unshielded equ ipment may cause interfer­
ence in the radio and the vehicle electronics .
67

compartment exceeds 131 °F (55 °C) . Once the
temperat ure falls below 131 °F (55 °C) again,
the cooler switches on again automatically.
- the battery is adequately charged . The cooler
switches off automatically if the vehicle battery
voltage falls below a minimum level. This pre­
vents the battery from discharging. The cooler
switches back on again automatically when the
battery voltage increases again (e.g. after start ­
ing the engine) .
The cooler cools to 42.8 °F
(+ 6 °C) and the freez­
er cools to 21.2 °F (- 6 °C) in optimum cooling
conditions . The cooling performance is affected
by the temperature in the luggage compartment .
The temperature inside the cooler will be higher
if the luggage compartment is hot .
& WARNING
To avoid putting the occupants at any risk,
please observe the following safety rules:
- The maximum capacity is 2.5 kg (5.5 lbs.).
- Never overload the cooler. This could cause
injury in the event of a collision or sudden
braking.
- The cooler lid must always be kept closed
while you are driving. Make sure the retain­
ing catch is securely engaged. The contents
of the cooler could be thrown forward into
the passenger compartment in the event of
a collision or under sudden braking -risk of
injury!
- Inflammable liquids, gas canisters, etc.
must not be stored in the cooler -risk of ex-
-
plosion! This also includes any products that
might emit volatile or inflammable gases.
- liquids will freeze at temperatures at or be­
low 32 °F (0 °C) and may cause glass bottles
to burst!
(D Note
- The ventilation openings for the cooler are
located on the back panel trim in the lug­
gage compartment and
must be kept clear
at all times.
- If the cooler is not functioning properly,
switch it off to prevent further damage .
Have it checked by a qualified workshop.
Seats and storage
Operation
App lies to : vehicles wit h coo ler
Fig. 83 Rear center a rmrest
The cooler is located in the rear cabin behind the
center armrest or behind the sliding cover (de­
pending on the equipment fitted in your vehicle) .
The cooler and freezer only work when the igni­
tion is on.
Opening / closing the cooler
• To open the cooler, pull the re lease lever CD
c:::>fig . 83.
• To close the cooler, push the lid back into its
original position. You should hear the release
lever
CD engage if the lid is properly closed.
Switching on/off
• Press button @ c:::> fig. 83 to switch the cooler
on/off . The symbol in the button is lit when this
function is activated .
• Press button @ to switch the freezer on/off.
The symbol in the button is lit when this func­
tion is activated .
(D Tips
-Always try to leave the lid open for as short
a time as possible to prevent condensation
buildup.
- Do not put hot food or drinks in the cooler.
75

Driving
(D Note
Always switch off the Start-Stop-System
when driving through water
c::> page 87.
Starting/stopping the engine
A pp lies to: ve hicles w ith Sta rt-Sto p-System
Fig. 91 Instrument cluste r: engin e sw itched off (s top
ph ase)
.. Slow the vehicle to a stop using the brake and
keep pressing the brake pedal. The engine will
switch off . The
[I] indicator light appears in the
information line in the instrument cluster dis­
play.
.. When you take your foot off the brake pedal,
the engine restarts. The indicator light turns
off.
Additional information
The engine will switch off in the P, D, N and S po­
sitions as well 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 eng ine starts
again when you select another selector lever po­
sition and take your foot off the brake pedal.
If you select the R position during a Stop phase,
the engine will start again.
Shift from D to P quickly to prevent the engine
from starting unintentionally when shifting
through R.
You can determine for yourself if the engine will
stop or not by reducing or increasing the amount
of force you use to press the brake pedal. For ex­
ample , if you only light ly press on the brake ped­
al in stop-and and-go traffic or when turning, the
engine will not switch off when the vehicle is sta-
86
tionary. As soon as you press the brake down
harder, the engine will switch off.
General information
Applies to: vehicles wi th Start-S top-Sys te m
The standard Start-Stop-mode can be cancelled
for different system-related reasons.
Fig. 92 Instrumen t cluster: e ngin e-Stop temporarily un­
ava ilable
Engine will not switch off
Before each stop phase, the system checks if cer­
tain conditions have been met. For example, the
engine will
not be switched off in the following
situations :
- The engine has not reached the minimum re­
quired temperature for Start-Stop-mode.
- The interior temperature selected by the A/C
system has not been reached .
- The outside temperature is extremely high/low.
- The windshield is being defrosted
c::> page 79 .
- The parking system* is switched on.
- The battery charge level is too low.
- The steering wheel is sharply turned or there is
a steering movement .
- After engaging the reverse gear .
- On sharp inclines.
The
llJ indicator light appears in the information
line in the instrument cluster display
c::>fig . 92.
Engine automatically restarts
The stop phase is interrupted in the following sit­
uations, for example . The engine restarts without
any action by the driver .
- The interior temperature varies from the tem-
perature selected in the A/C system. ..,.

Smart Technology
Switching on and off
ESC turns on automatically when you start the engine.
Fig. 186 Center console w it h ESC O FF but ton
ESC level s
Sport mode on
The following situations are exceptions where it
may be useful to switch on sport mode to allow
the wheels to spin:
- Rocking the vehicle to free it when it is stuck
- Driving in deep snow or on loose ground
- Dr iving with snow chains
Sport mode off
Behavior
The ESC and ASR stabilization functions The full stabilization function of the ESC
are limited ¢
A:,.. and ASR is ava ilable again .
Operation Press the 00 button. Press
the[!] button again.
Indicator II turns on. II turns off .
lights
Driver mes- Stabilization control (ESC): Sport Warn- Stabilization control (ESC): On
sages ing! Reduced stability
A WARNING
You should only switch sport mode on if your
dr iv ing abilities and road condit ions perm it .
- The stabilization function is limited when
sport mode is sw itched on. The driving
wheels cou ld spin and the vehicle could
swerve, espec ially on s lick o r sli ppery road
s urfac es.
Sport mode cannot be sw itched on if t he
cruise cont rol system* or the adaptive cru ise
cont rol* is switched on.
Braking
What affects braking efficiency?
New brake pads
During the first 250 miles (400 km), new brake
pads do not possess the ir full braking effect, they
have to be "broken in" first ¢
.1:,.. The break-in pe­
riod can be considerably longe r fo r vehicles with
192
ceramic brake rotors*. You can compensate for
this slightly reduced braking power by push ing
harder on the brake pedal. Avoid heavy braking
lo ads during the break-in period.
Operating conditions and driving habits
The brakes on today's automobiles are still sub ­
j ect to wear, depending large ly on operating con­
ditions and driving habits¢,& . On vehicles that
are either driven mostly in stop-and-go city traf­
fic or are driven hard, the brake pads should be
checked by your authorized Audi dealer more of ­
ten than specified in the
Warranty & Mainte­
nance booklet .
Failure to have your brake pads
inspected can result in reduced brake perform­
ance.
On steep slopes, you should use the brak ing ef­
fect of the engine. T his way, you prevent unnec­
essary wea r on the brake system. If you mus t use
your brakes, do not hold the brakes down contin-
u ously. Pump th e brakes at intervals. ..,.

Operating noi se
Noises may occur when braki ng depend ing on the
speed, braking force and outside cond itions s uch
as temperature and humidity.
Due to the na ture of t he mate ria ls used in ce ram­
ic bra ke rotors*, noises m ay become mo re appa­
ren t at low speeds.
Effect of wat er and road salt
In ce rtain situat ions, for example after driving
through water, in heavy ra in, afte r ove rnig ht con­
densat ion or after washing your car, the braking
effe ct can be red uced by moisture or ice on the
b rake rotors and brake pads. The brakes must be
dried first w ith a few careful brake applications .
At highe r speeds and with t he windsh ie ld wipers
turned o n, the bra ke pads p ress against the bra ke
rotors for a short amount of time . This occ urs at
regular intervals without the driver noticing and
provides for better bra ke response time under
wet conditions.
The effectiveness of the brakes can be reduced
when the vehicle is dr iven on a salt-covered road
and the brakes are not used. L ikewise, you clean
off accumu lated salt coat ing from brake discs
and pads with a few cautious applications of the
brake
c::> ,& .
Due to their sur face characteristics, ceramic
brake rotors* absorb mo isture in such condit ions.
This can cause a temporary reduction in braking
force compared to dry brakes. You can compen­
sate for this by pressing the brake peda l harder.
Cor rosion
There may be a tendency for dirt to b uild up on
the brake pads and corros ion to form on the discs
if the car is not driven regularly or only for short
tr ips with little use of the brakes.
If the brakes are not used frequently, or if corro­
sion has formed on the discs, it is adv isable to
clean off the pads and discs by brak ing firmly a
few t imes from a moderately high speed
c::> ,& .
Sma rt Technology
Faults in the brake system
If you s hou ld notice a sudden increase in br ake
peda l travel, then one of the two bra ke circu its
may have fai led
c::> ,& .
Low brake fluid level
Malfunctions ca n occu r in the brake system if the
brake fluid level is too low . T he brake flu id leve l
is monitored elect ronically.
Brake boost er
The brake booster works w ith vacuum pressure
wh ich is created only when the engine is runn ing
c::> ,& .
Brake lining wear status
Brake lining wear may be checked by visua l in­
spect ion of the cond ition of the brake pads
t hr ough the openings in the wheel. If necessary,
the wheel may be removed for t his inspection
c::> page 259, Replacing wheels .
.8_ WARNING
-New b rake p ads don't h ave the bes t stop­
p ing power an d must be "broken-in" during
the initial 250 miles (400 km) . The break-in
pe riod can be considerably longer for
veh icles with ceramic brake rotors*. You can
compensate for this by pressing the brake
pedal more firmly. This also applies late r
when new pads are installed.
- You shou ld perform braking maneuvers for
the purpose of cleaning the brake system only i f road co ndit ions pe rmit . Other road
users m ust not be put at r is k -you may
cause an ac cident!
- Before descending a steep g rade, reduce
speed and sh ift transmission into a lower
gear o r lower dr iving range. Do not r ide the
b ra kes or hold the pe dal down too long or
too often. This cou ld cause the b rakes to ge t
hot and dimin ish b raking effic iency .
- Do not " ride the bra kes" by rest ing you r foot
on the pedal when you do no t intend to
brake. This may cause the brakes to over­
heat, premature wear and increased stop­
p ing distance.
193

Driving through water on
roads
Note the following to avoid vehicle damage when
driving through water, for example on flooded
roads:
- The water must not be any higher than the bot­
tom of the vehicle body.
- Do not drive faster than wa lking speed.
A WARNING
After driving through water, mud, slush, etc.,
the brakes may be slow to take effect because
of wet brake rotors and pads . Dry the brakes
first by brak ing carefully to restore the full
brak ing effect.
([) Note
-Vehicle components such as the engine,
transm ission, suspension or electrical sys ­
tem can be severely damaged by driving
th rough water.
- Always switch off the Sta rt-Stop-System*
whe n driving through water¢
page 85 .
(D Tips
-Check the depth of the water before driving
through it.
- Do not stop the veh icle, dr ive in reverse or
switch the eng ine off when dr iving through
wa ter .
- Keep in mind that oncoming ve hicles may
create waves that raise the water level and
make it too deep for your vehicle to drive
th rough safely.
- Avo id driving through salt water because it
can cause corrosion.
Driving and the envir onment
Economical and environ­
mentally-friendly driving
General
Your personal style of driving will determine the
economy of your vehicle, as well as exhaust and
nois e levels .
Fuel economy, e nv ir onmental impact, and wear
o n your eng ine, brakes and tires large ly depend
on three factors:
- your personal driving style
- operat ing cond itions
- technical limitations
If you anticipate what you need to do next and
drive economically, you can easily cut your fuel
consumption by 10-15 percent. Th is section will
give you some tips on how you can help the envi­
ronment and your pocketbook .
(D Tips
The consumption estimates as published by
ENVIRONMENTAL PROTECTION AGENCY
(EPA) and Transport Canada may not corre­
spond to your actual consumption on the
r oad, which w ill vary depending upon vehicle
l oad and speed, road and weather conditions,
trip length , etc.
Drive smoothly and keep a lookout ahead
Vehicles use the most fuel when they are acceler­
ating.
.,. Avoid unnecessary accelerat ing and braking .
Vehicles use the most fuel when they are acceler­ at ing . If you anticipate what is going to happen
next, you w ill need to brake less and, thus, accel­
erate less. Let the vehicle coast whenever possi­
ble - for example when you see that the next traf­
fic lig ht is red.
199