AUDI A6 2018 Repair Manual

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Warm and cold
Automatic climate control
Applies to: ve hicles with deluxe a utoma tic climate co ntro l
We recommend pressing the !AUTO ! button and setting the temperature to 72 °F (22 °C) .
Fig. 71 Deluxe automatic cl imate cont rol: contro ls
Press the buttons to turn the functions on or off .
The dial adjusts the temperature and the blower.
The LED in a button will light up when the func­
tion is sw itched on .
IAUTO I
Switching automatic mode on
Automatic mode mainta ins a constant tempera­
ture inside the veh icle. Air temperature, airflow
and a ir distribution are controlled automatically .
Adjusting the temperature
The temperature can be adjusted individua lly for
the driver and front passenger using the dials
(D
and@.
Adjusting the blower ~
Using the dial @, you can manually adjust the
amount of air generated by the blower to suit
your preferences. The blower should always run at a low setting to prevent the windows from
fogging and to ensure a cont inuous exchange of
air inside the vehicle. To have the blower regulat­
ed automatically, p ress the
!AUTO ! button.
~.rill ,~ Adjusting air distribution
You can manua lly se lect the vents where the air
will flow. To have the air distribution regulated
automatically, press the
IAUTO ! button.
1- 1 Switching recirculation mode on/off
In recirculation mode, the air inside the vehicle is
c ir culated and filtered. Th is prevents the unf il­
tered air outside the vehicle from entering the
vehicle interior . Switching rec irculat ion mode on
when driving through a tunnel or when sitting in
t raffic is recommended
c::> .&_ .
The !AUTO I button or! <iii> FRONT ! button switches
recirculation mode off .
IOFFI Switching the climate control system
on/off
The ! OF F! button sw itches the climate control
system on or off. It also switches on when you press the blower cont rol. Airflow from outside is
blocked when t he climate cont rol system is
switched off.
IA/C l Switching cooling mode on/off
The air is not cooled and humidity is not removed
when cooling mode is switched off. This can
cause fog on the windows . The cooling mode
switches off automatically when there are cold
outside temperatures.
is;,i, FRONT I Switching the defroster on/off
The w indshield and side windows are defrosted
or cleared of condensat ion as quickly as poss ible .
.,,_
59

Warm and cold
The maximum amo unt of air flows ma inly from
the vents below the windshield. Recircu lation
mode switches off . The temperature should be
set to approximately 72
°F (22 °() .
The IAUTO I button switches the defroster off .
IClill REAR I Switching the rear window defogger
on /off
T he re a r window heate r on ly operates when t he
engine is r unning . It sw itches of f automat ica lly
afte r a few minutes, depe nding on the outs ide
temperature .
T o preven t the rear w indow hea ter from swit ch­
i n g off automatically, p ress and ho ld the
I Qiil REARI
button fo r more than 2 seconds . This is stored
until the ignit io n is switched o ff.
[i] Adjusting seat heating*
P ress ing t he b utton swi tches the se at heati ng on
at the highes t set ting (level 3). The LEDs indicate
the tempe ra tu re level. To reduce the tempera ­
ture, press the button again. To switch the seat heating off, press the butto n repeatedly until the
LED turns off.
After 10 minutes, t he seat hea ting au tomatically
sw itches from leve l 3 to leve l 2 .
4-zone deluxe automatic climate control
A pp lies to: ve hicles with 4-zo ne deluxe auto matic cl imate cont rol
Air vents
You can open o r close the center and re a r ve nts in
t h e co ckpit and the vents in the rear center con ­
so le using the ridged thumbw heels . The leve rs
adjust the direction of the airflow from the vents .
.&_ WARNING
- You sho uld not use the recirc ulation mode
for an extended period of time since no
fresh air is drawn in . W ith the air-condition­
ing sw itched off, the windows can fog up,
which inc reas es th e risk of an acc ident.
- Individ uals with red uced sensit iv ity to pa in
or temperature could develop b urns when
using the seat h eating f unction. To re duce
t he risk of injur y, t hese i ndividu als s ho uld
no t u se se at h eating .
(D Note
To avoid damage to the hea ting elements in
th e se ats , d o no t kne el on th e seats or place
h eavy lo ad s on a small a rea of the se at.
We recommend pressing the !AU TO I button and se tting the temperatu re to 72 ° F (2 2 °C).
Fig. 72 4-zo ne deluxe a uto mat ic cl imate contro l: cont rols
60

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Fig. 73 4-zone de luxe automat ic cl imate cont rol system:
rear contro ls
N :g 0 C)
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Press the buttons to turn the functions on or off .
Use the controls to adjust the temperature, the
blower speed and the air distribution. The LED in
a butto n will light up when the function is
sw itched on . The front sett ings are shown in the
climate control system display and in the Info­
tainment system d isp lay for a few seconds. The
d river and front passenger sett ings can be ad­
justed separately.
The settings can also be adjusted in the rear
~ fig. 73.
IOFF I Switching the clim ate control s ystem
on /off
The IO FFI button switches the cl imate control
system on or off. It also sw itches on when you
p ress the cont rol. A irflow from outside is b locked
when the climate con trol sys tem is swi tched off .
The
IOF FI button in the rear only switc hes the A/C
system on/off in the rear of the vehicle .
IAJCI Switching cooling mode on /off
The a ir is not cooled and hum idity is not removed
when cooling mode is switched off. This can
cause fog o n the w indows . The cooling mode
switches off automatically when there are cold
outside temperatures.
1 "9:) 1 Switching recirculation mode on /off
In recircu lation mode, the a ir inside the vehicle is
circu lated and fi ltered. This preven ts the unfil­
t ered a ir outside the vehicle from ente ring the
ve hicle interior. Switc hing recircu lation mode on
when driving t hrough a tunnel or when sitting in
traffic is recommended
~ .&. .
Warm and c old
The IAUTO I button or I llW F RONT I button switches
recircu lation mode off.
IAUTOI Switching automatic mode on
Automat ic mode main tains a cons tant tempera­
tu re inside the vehicle. Ai r temperatu re, a irflow
and air distr ib ution are controlled automa tica lly .
If press and hold the button longer,
72 °F (22 °C)
will be set .
Adjusting the temperature
Temperatures between 60 °F (+ 16 °() and 84 °F
(+28 °() ca n be set . If outside of this range, LO or
HI w ill appea r in the climate control system dis­
play . In bot h sett ings, the climate cont rol runs
constantly at the max imum cool ing or heat ing
level. The temperat ure is no t regu lated.
Adjusting the blower ~
You can adjust the volume of a ir generated by the
blower to your p reference . T he blower s hould al­
ways ru n at a low sett ing to prevent the wi ndows
from fogg ing and to ensure a cont inuo us ex ·
ch ange of air inside the vehicle. To have th e blow ­
er reg ulated automatically , press t he
IAU TO I bu t­
ton .
~ Adjusting air distribution
You can ma nually select the ven ts where the air
will flow. To h ave the air d istr ib utio n regula ted
a utomat ica lly, press the
IAUTOI button.
~ Adjusting seat heating* /seat ventilation *
Pressing the button sw itches the seat heating/
seat venti lation o n at the h ighest sett ing (level
3). The LE Ds i nd icate the tempe ratu re level. To
r ed uce the temperat ure, press the b utton agai n.
T o switc h the seat heat ing/seat ventilation off,
press the button repeatedly unti l the LED turns
off.
After
1 0 m in utes, the seat heat ing automat ically
swi tches from level 3 to level 2.
l<ii> FRO NTI Switching the defroster on /off
T he w indshield and side windows a re defrosted
o r clea red of condensat ion as quickly as poss ible.
T he maxim um amount of a ir flows mainly from
t h e vents below the winds hield. Rec ircu lat io n
..,..
61

Warm and cold
mode switches off . The temperature shou ld be
set to approximate ly 72 ° F (22 °C).
The
IAUTOI button sw itches the defroster off.
IQill REAR I Switching the rear window defogger
on /off
The rear window heate r on ly operates when the
e ng ine is r unni ng.
It sw itches off a utomat ica lly
afte r a few minutes, depend ing on the o utside
temperature .
To prevent the rear w indow heater from swit ch­
i n g off automatically, p ress and ho ld the
l lliil REAR I
button fo r more than 2 seconds . This is s tored
until the ignition is switched off.
I SYNC I Synchronization
When synchronization is switched on, the set­
tings for the dr ive r's side are appl ied to the front
p a ssenger's s ide (except for se at heating/ventila­
tion*) . The settings in t he rear are a lso synchron ­
ized. Synchronization switches off when the set ­
tings are adj usted individually for the front pas ­
senger 's side or for the rear.
You can sync hronize the settings in a row by
p ressing and holding a contro l. For example, to
app ly the settings for the front passenger 's side
to the driver's side, press and ho ld the contro l on
the front passenger's side. The same applies to
the rear .
Residual heat *
With the ignition turned off, yo u can activate the
residual heat function by pressing the
Iii button
c:> fig. 72. The residual heat from the coolant is
used to heat the vehicle interior. The residual
heat function switches off automatically after
about 30 m inutes .
Air vents
You can open or close the center and rear vents in
the cockpit and the vents in the rear center con ­
sole and door p illars using the r idged thumb­
wheels . The levers adjust the direct ion of the a ir­
flow from the vents .
62
A WARNING
-You shou ld not use the recircu lation mode
for an extended period of time since no
fresh air is drawn in . W it h the air-condition­
ing sw itched off, the windows ca n fog up,
whi ch inc reases the risk of an acc ident.
- Individ uals w ith reduced sensit iv ity to pa in
or tempe rature co uld develop b urns when
using the sea t heat ing f unct io n. T o re duce
t he r isk of injury, t hese individua ls sho uld
no t u se sea t hea ting.
@ Note
T o avoid damage to the heating elements in
the seats, do no t knee l on t he se ats o r pla ce
h eavy lo ads on a small area of the seat.
Basic settings
The climate control system basic settings are ac­
cessed in the Infotainment system.
~ Select: the I CARI funct ion button > (Car )* Sys-
tems
contro l butto n > AC.
Rear seat settings *
When this function is se lected, all settings for
the rear can be adjusted through the climate con­
trol system in the cockp it . T he climate control
system settings cannot be ad justed in the rear
seat at the same time. This f unct io n sw itches off
after a ce rtain per iod of t ime o r whe n one of t he
con tro ls in t he coc kp it is pressed.
Automatic recirculation*
The sensitivity level of t he automatic recircula­
tion mode can be set at various levels from
Off to
Sen sitive . Recircul at io n mode is cont ro lled auto­
matically. If the w indows fog up, p ress t he
l<iii> F RON T! button.
Footwell temperature*
You can adjust the footwell temperature so that
i t is cooler or wa rme r.

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Steering wheel heating
Applies to: veh icles with steering wheel heating
The steering wheel rim can be heated.
Fig . 74 Steering wheel: steering wheel heating button
~ Press the~ button to switch steer ing whee l
heating on/off. The message
Steering wheel
heating on /Steering wheel heating off
ap­
pears in the instrument cluster display.
The temperature is maintained at a constant lev­
e l when steering wheel heat ing is switched on.
The steering wheel heating settings are stored
automatically and ass igned to the remote control
key that is in use.
Warm and cold
63

Drivin g
Driving
General information
Breaking in
A new vehicle must be broken in for the first 1,000 mi les (1,500 km). Do not dr ive at speeds
t hat will exceed 2/3 of the max imum pe rm itted
engine speed (RPM) for the first 600 miles
(1,000 km), and avoid fu ll acceleration during
this period . You may gradually start increasing
the RPM and the speed between 600 miles
(1,000 km) and 1,000 miles (1,500 km) .
During the first hours of use, the engine has a
higher internal friction than later on when all
moving parts have settled into place with each
other.
How the vehicle is driven d uring the first 1,000
miles (1 ,500 km) a lso affects the engine quality .
Drive at moderate engine speeds after the initial
break-in per iod, part icu larly when running a cold
eng ine . Th is will reduce eng ine wear and improve
the m ileage .
Do not drive at too
low of an engine speed (RPM).
Shift down if the engine stops running "smooth­ ly". Extremely high eng ine speeds are automati­
cally reduced .
Reducing the risk of vehicle damage
@ Note
When driving on poo r roads, by cu rbs and on
s teep ramps, make su re t hat low-hang ing
compone nts such as the spo ile r and exha ust
system do not come into contact with these
or they could be damaged. This especially ap ­
plies to vehicles with low ground clearance
and veh icles that are heavily loaded.
Warming up/cooling down
Applies to: S models
By warming up/cooling down the engine carefu l­
ly, you can help red uce unnecessary stra in o n
your veh icle when driving in a sporty sty le .
64
The eng ine speed is lim ited when the engine is
cold - the full engine output is not availab le.
When the engine is at operat ing temperatu re,
the engine speed limitation moves to a h igher
RPM range. A lso, cold t ires may not have full
road gr ipping capab ilities until they have warmed
up .
Your vehicle a lso has an after-run cooling fea­
ture . However, cooling down is still important.
The eng ine and the brakes as well as the exhaust
system and the transmission become very hot
whe n driving in a spo rty style . Before you shut
t h e ve hicle off, you should cool down the vehicle
by d rivi ng a few miles at low speeds with l igh t ac ­
ce leration.
Driving through water on roads
Note the following to reduce the risk of vehicle
damag e when driving throug h water, for exampl e
on f looded roads:
- The water must not be any higher t han the bo t­
tom of the vehicle body.
- Do not dr ive faster tha n wal king speed .
& WARNING
After driving th ro ugh water or m ud, the effec ­
tiveness of the brakes may be red uce d due to
mo isture on the brake rotors and brake pads.
A few careful brake app lications shou ld dry
off the brakes and restore the full braking ef­
fect .
@ Note
-Vehicle components such as the engine,
t ransmiss ion, suspens ion or elect rical sys­
tem can be seve rely damaged by drivi ng
throug h water .
- Always switch the Start/Stop system* off
when driving through water
¢ page 70 .
(D Tips
- Determine the depth before driving throug h
water.
- Do not stop the vehicle, drive in reverse or
switch the engine off when driving through
water.

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-Keep in mind that oncoming vehicles may
create waves that raise the water level and
make it too deep for your vehicle to drive
through safely.
-Avoid driving through salt water, because
this can cause corrosion.
Economical and environmentally-friendly
driving
The amount of fuel consumption, the environ­
mental impact and the wear to the engine,
brakes and tires depends mostly on your driving
style. With an anticipatory and economic driving
style, fuel consumption can be reduced by ap­
proximately 10-15%. The following tips will help
you conserve the environment and your money at the same time.
Anticipatory driving
A vehicle uses the most fuel when accelerating.
When you drive with anticipation, you do not
need to brake as often and so you accelerate less.
When possible, let your vehicle coast with a
gear
engaged, 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
sumption to zero (fuel shut-off during decelera­
tion) .
Shift efficiently
Upshifting earlier is an effective way to save fuel.
Staying in a gear too long uses fuel unnecessari­
ly .
Press down on the accelerator pedal slowly and
avoid "kick-down".
Avoid full acceleration
You should rarely travel at the maximum vehicle
speed. High speeds cause a disproportionately
high increase in fuel consumption, emissions and
traffic noise. Slower driving saves fuel.
Reduce idling time
The Start/Stop system* helps to reduce the idling
time automatically. In vehicles without the Start/
8 Stop system*, it is efficient to switch the engine 0 \.J '<t
Driving
off when stopped at railroad crossings and long
red lights. Stopping the engine for 30-40 sec­
onds already saves more fuel than the amount of
extra fuel needed to restart the engine.
It takes a very long time in idle to warm the en­
gine up to operating temperature. Wear and
emissions are especially high in the warm-up
phase. Therefore, you should begin driving im­
mediately after starting the engine. Avoid high
RPMs while doing this .
Have maintenance performed regularly
By having maintenance performed regularly on
your vehicle, you can help to reduce fuel con­
sumption before you even start to drive. The maintenance condition of your vehicle not only
affects traffic safety and long-term value but al ­
so impacts
fuel consumption . A poorly main­
tained engine can lead to fuel consumption that
is 10% higher than normal.
Avoid short trips
The engine and emissions control system must
reach their optimal operating temperature to ef­
fectively reduce consumption and emissions .
A cold engine uses a disproportionately high amount of fuel. The engine reaches operating
temperature and consumption normalizes only
after approximately
2 .5 miles (4 km) .
Check the tire pressure
To save fuel, make sure the tires are always in­
flated to the correct pressure
Q page 211. The
fuel consumption can increase by S% if the pres­
sure is only 0.5 bar too low . Due to the increased
rolling resistance, low tire pressures will also
lead to greater tire
wear and will affect driving
behavior.
Do not drive on
winter tires year -round, as this
will consume up to 10% more fuel.
Eliminate unnecessary weight
Since every pound of extra weight increases fuel
consumption, a quick inspection of the luggage
compartment may be worth it to avoid unneces -
sary weight.
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65

Driving
When not being used, a roof rack should be re­moved to decrease the wind resistance of the ve­
hicle. You will save approximately 12% of your
fuel when at speeds from 62- 7 5 mph
(100-120 km/h) .
Save energy
The engine drives the generator, which generates
electricity ; the fuel consumption also increases
with the demand for electricity. Therefore, switch electrical equipment off when you no longer
need it. Examples of equipment that uses a lot of
energy are air blowers at a high setting, the rear
window defogger and seat heating* .
@ Note
Do not leave engine idling unattended after
starting. If warning lights should come on to
ind icate improper operation, they would go
unheeded. Extended idling also produces
heat, which could result in overheating or
other damage to the vehicle or other proper-
ty.
@ Note
- Have your vehicle maintained properly and
in accordance with the service recommenda­
tions in your Warranty
& Maintenance book­
let. Lack of proper maintenance as well as
improper use of the vehicle will impair the
function of the emission control system and
could lead to damage.
- Do not alter or remove any component of
the Emission Control System unless ap­ proved by the manufacturer .
- Do not alter or remove any device , such as
heat shields, switches, ignition wires,
valves, which are designed to protect your
vehicle's Emission Control System and other important vehicle components .
@ Tips
The consumption estimates as published by
ENVIRONMENTAL PROTECTION AGENCY (EPA) and Transport Canada may not corre­
spond to your actual consumption on the
road, which will vary depending upon vehicle
66
load and speed, road and weather conditions ,
trip length, etc.
Steering
Manual steering wheel position adjustment
Applies to: vehicles with manual steering wheel adjustment
The steering wheel posi tion is adjustable up and
down and forward and back .
Fig. 75 Lever on th e stee ring column
.,. Pull the lever in the direction of the arrow
~A -
... Bring the steering wheel into the desired posi­
tion .
.,. Push the lever against the steering column un ­
til it is secure.
A WARNING
Improper use of steering wheel adjustment
and improper seating position can cause seri­
ous personal injury.
-Adjust the steering wheel column only when
the vehicle is not moving to prevent loss of
vehicle control.
-Adjust the driver's seat or steering wheel so
that there is a minimum of 10 in (25 cm)
between your chest and the steering wheel
~page 126, fig. 138. If you cannot main­
tain this minimum distance, the airbag sys­
tem cannot protect you properly .
- If physical limitations prevent you from sit­
ting 10 in (25 cm) or more from the steer­
ing wheel, check with your authorized Audi
dealer to see if adaptive equipment is avail-
able.
.,.

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-If the steering wheel is aligned with your
face, the supplemental driver's airbag can­
not provide as much protection in an acci­
dent . Always make sure that the steering
wheel is aligned with your chest .
- Always hold the steering wheel with your
hands at the 9 o'clock and 3 o'clock posi­
tions to reduce the risk of personal injury if
the driver's airbag deploys.
- Never hold the steering wheel at the 12 o'clock position or with your hands inside
the steering wheel rim or on the steering
wheel hub. Holding the steering wheel the
wrong way can cause serious injuries to the hands, arms and head if the driver's airbag
deploys.
Power steering wheel position adjustment
Applies to: veh icles with power steering wheel adjustment
The steering wheel position can be adjusted elec­
trically up and down and forward and back.
Fig. 76 Switch for adjusting the steering whee l pos itio n
.,. To adjust the height, press the switch up/down.
The steering column will continue moving as
long as you are pressing the switch .
.,. To move the steering wheel forward or back,
press the switch forward/back. The steering
column will continue moving as long as you are
pressing the switch.
The steering wheel can also be adjusted when the ignition is switched off .
In vehicles with memory fun ction*, the steering
column settings are stored together with the
seat position.
Driving
A WARNING
Improper use of steering wheel adjustment
and improper seating position can cause seri­
ous personal injury.
- Adjust the steering wheel column only when
the vehicle is not moving to prevent loss of
vehicle control.
- Adjust the driver's seat or steering wheel so
that there is a minimum of 10 in (25 cm) between your chest and the steering wheel
¢ page 126, fig. 138. If you cannot main­
tain this minimum distance, the airbag sys­
tem cannot protect you properly.
- If physical limitations prevent you from sit­
ting 10 in (25 cm) or more from the steer­
ing wheel, check with your authorized Audi
dealer to see if adaptive equipment is avail­
able.
- If the steering wheel is aligned with your
face, the supplemental driver's airbag can­ not provide as much protection in an acci­
dent. Always make sure that the steering
wheel is aligned with your chest.
- Always hold the steering wheel with your
hands at the 9 o'clock and 3 o'clock posi­
tions to reduce the risk of personal injury if
the driver's airbag deploys .
- Never hold the steering wheel at the 12
o'clock position or with your hands inside
the steering wheel rim or on the steering
wheel hub. Holding the steering wheel the
wrong way can cause serious injuries to the
hands, arms and head if the driver's airbag
deploys.
Easy seat entry
Applies to: vehicles with power stee ring wheel adjus tment
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 ICARI
function button > (Car)* Systems control but­
ton
> Vehicle settings > Seats > Driver's seat >
Easy seat entry > On.
When easy seat entry is switched on, the steering
column goes back up into the park position when
.,.
67

Driving
the ignition is switched off. After entering the ve­
hicle, the steering co lumn returns to the stored
position once the ignition is sw itched on.
Starting and stopping
the engine
Starting the engine
The I S TAR T ENGINE ST OP I button switches the
ignition on and starts the engine.
Fig. 77 Center co nsole : START ENGINE STO P butto n
Starting the engine
.. Press the brake pedal and move the se lector
lever into the P or N po sit ion
¢ ,A .
.. Press the I START ENGIN E STOPI button . The
engine will start .
Switch ing the ignition on /off
If you wou ld like to switch the ignition on with­
out starting the engine, follow these steps:
.. Press the I S TAR T ENG IN E STOPI button with­
out
pressing the brake pedal.
.. To switch the ignition off, press the button
again. The needle in the tachometer
moves into
the
OFF position.
Equipment that uses a lot of electricity is switch­
ed off temporari ly when you start the engine .
If the engine does not start immediate ly, the
starting procedure stops automatically after a
short time. Repeat the starting procedure .
ll This fun ctio n is not availab le in all c oun tries.
68
Start /Stop system*
See the information in ¢ page 70, Start/Stop
system.
A WARNING
To reduce the risk of poisoning, never allow
the engine to run in confined spaces.
(D Note
Avoid high engine speed, full th rottle, and
heavy engine load if the engine has not
reached operating temperature yet . You could
damage the engine.
@ For the sake of the environment
Do not let the engine run while parked to
warm up. Begin driving immediate ly. This re­
duces unnecessary emissions.
(D Tips
- Some noise after starting the engine is nor­
ma l and is no cause for concern.
- If you leave the veh icle w ith the ignition
switched on, the ignition w ill switch off af ­
ter a certain amount of time . Make sure that
electrical equipment such as the exterior
lights are switched off .
Stopping the engine
.. Bring the vehicle to a full stop .
.. Move the selector lever to the P or N posit io n.
.. Press the I START ENGINE STOP I button
¢ page 68, fig. 77.
Steering lock1>
The steering locks when you turn the engine off
using the
I STAR T ENGIN E STOPI button and
open the driver's door . The locked steering helps
prevent veh icle theft .
Emergency off function*
If it is absolutely necessary, the engine can also
be turned off while driving in the R or D/S selec-
tor lever position at speeds be low 6 mph (10 km/
...