2017 AUDI A4 heater

Warm and cold
Warm and cold
Climate control system
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 bui ld-up of heat
inside the vehicle, ventilation can he lp to speed
up the cooling process.
I n all heating mode f unctions except for
defrost ,
the blower only switches to a higher speed once
the engine coolant has reached a sufficient tem­
perature .
Pollutant filt er
The po llutant filter removes poll utants such as
dust and pollen from the a ir .
Ke y recognit ion
The climate control settings are automatically
stored and assigned to the remote contro l key
that is in use .
@) For the sake of the environment
-If you wo uld like to reduce fuel consump­
tion, switch the ai r cond itioning off. This
will a lso reduce em issions.
68
- In veh icles with a diesel engine, you can
switch the auxiliary heater off in the Info­
tainment system.
(D Tips
- To prevent interference with the heating
and cooling output and to prevent the win­
dows from fogging over, the a ir intake in
front of the windshield must be free of ice,
snow or leaves.
- Condensation from the cooling system can dr ip and form a puddle of water under the
vehicle . This is normal and does not mean
there is a leak .
- If you see that, for example, the seat heat­
ing* or rear w indow defogger are not heat­
ing, the energy management system may
have switched them off temporari ly . These
systems a re available again as soon as the
energy supply has been resto red.

To keep the rear window defogger on continuous­ly, press the
Qi!) REAR button longer than 3 sec­
onds. Th is is stored until the ignition is sw itched
off.
SYNC
Synchronizat ion
Use the rocker switch ® to select the fu nct ion .
When synchronization is switched on, the set­
tings for the driver's side are applied to the front
passenger's side and the rear (except for seat
heating/ventilation*). When the settings on the
front passenger's s ide or in the rear are changed,
the synchronization is automatically sw itched off
and
3-zone appears in the display .
SET REAR
function
Use the rocker switch ® to select the funct ion.
When the function is switched on, you can adjust
all settings for the rear using the climate control
system controls in the cockpit . The rear climate
control system controls can not be operated at
the same time. This function switches off a uto­
matically after a certain period of time or after
l eav ing the menu.
Air vents
You can open or close the center and rear vents in
the cockpit and the vents in the rear center con­
sole using the ridged thumbwheels. The levers
adjust the direction of the airflow from the vents.
The wide ve nt is opened and closed using the
rocker switch ®·
Residual heat
You can activate the residual heat funct ion when
the ignition is switched off by pressing the knob
(D. The res idual heat from the coolant is used to
h eat the vehicle inte rior. The residual heat fu nc­
tion switches off automatically after about 15
minutes .
A WARNING
-You should not use the recirculation mode
for an extended period of time since no
fresh a ir is drawn in. With the air-condition­
ing switched off, the windows can fog up,
wh ic h increases the r isk of an accident.
Warm and cold
-Individuals with reduced sensit ivity to pain
or temperature could develop burns when
using the seat heating function. To reduce
the risk of injury, these individuals should
not use seat heating.
(D Note
To avoid damage to the heating elements in
the seats, do not knee l on the seats or place
heavy loads on a small area of the seat.
Basic settings
The climate control system basic settings are ac­
cessed in the Infotainment system.
.,. Select in the Infotainment system: I MENU ! but­
ton
> Vehicle > left control button > Air condi­
tioning
Automatic recirculation
When switched on, automatic rec irculat ion con­
trols the recircu lation mode automatically . You
must press the@
MAX button if fog forms on
the windows.
Automatic auxiliary heater*
T he auxi liary heater he lps to warm the vehicle in­
terior more quickly.
Steering wheel heating
Applies to: veh icles w ith stee ring w hee l heat ing
The steering wheel rim can be heated.
Fi g. 75 Steering whee l: steer ing whee l heating button
.,. Press the button to sw itch the steering wheel
heating on and off~-The message
Steering
wheel heating: on /Steering wheel heating: off
appears in the instrument cluster displa y. IJ,,
71

switched on and turns the airbag indicator light
on when a malfunction in the one of the system
components is detected
c::> page 265. Because
the front passenger seat contains important
parts of the Advanced Airbag System, you must
take care to prevent it from being damaged .
Damage to the seat may p revent the Advanced
Airbag System for the front passenger seat from
doing its job in a crash.
The f ront Ad vanc ed Airb ag Sy stem con sist s
of the following:
- Crash sensors in the front of the vehicle that
measu re vehicle accelerat ion/ decelerat ion to
provide information to the Advanced Airbag
System about the severity of the crash.
- An electronic cont rol unit, with integrated
c rash sensors for front and side impacts. The
contro l unit "decides" whether to fire the front
airbags based on the information received from
the crash sensors . The contro l unit also "de­
cides" whether the safety be lt pretensioners
should be activated .
- An Advanced Airbag with gas generator and
contro l valve for the driver ins ide the steer ing
wheel hub.
- An Advanced Airbag with gas generator and
contro l valve inside the instrument panel for
the front passenger.
- A capac itive passenger detect ion system under­
neath the front passenger seat cover. This sys­
tem measures the electrical capac itance of the
person in the seat . The information registered
i s sent conti nuously to the electron ic cont rol
unit to regulate deployment of the front Ad­
vanced Airbag on the passenge r side.
- An airbag monitoring system and indicator
li ght
mi n the instrument cluster.
- A sensor in each front seat registers the dis­
tance between the respective seat and the
stee ring wheel or instrument panel. The info r­
mation reg istered is sent contin uous ly to the
electronic control unit to regulate deployment
of the front Adv a need Airbags.
- T he
PASSE NGER AIR BAG OFF~; ON @ light
; comes on in the headliner
c:> page 265,
~ fig. 222 and te lls you the status of the Ad-
8 vanced Airbag on the passenger side. 0
3 Airb ag sys tem
-A sensor in the safety belt latch for the driver
and for the front seat passenger that senses
whether that safety be lt is latched or not and
transmits this information to the electronic control un it.
A WARNING ,.__
Damage to the front passenger seat can pre­
vent the front airbag from working properly .
- Improper repair or disassembly of the front
passenger and driver seat will prevent the
Advanced Airbag System from funct ion ing
p roperly.
- Repairs to the front passenger seat must be
pe rformed by qualified and properly trained
wo rkshop personne l.
- Never remove the front passenger or driver
seat from the vehicle .
- Never remove the upholstery from the front
passe nger seat.
- Never d isassemble or remove parts from the
seat or disconnect w ires from it.
- Never carry sharp objects in your pockets or
put them on the seat. The capacit ive pas­
senger detect ion mat in the front passenger
seat will not function p roperly if it is punc­
tured.
- Never carry things on your lap or carry ob­
jects on the front passenge r seat. Such ob ­
jects ca n infl uence the capacitance reg is­
tered by the capacitive passenger detection
system, so that incorrect information is pro­
vided to the airbag control unit.
- Never store items unde r the front passenger
seat . Parts of the Advanced Airbag System
under the passenger seat could be dam­
aged, preventing them and the airbag sys­
tem from working properly.
- Never p lace seat covers or replacement up­
holstery that have not been specifically ap­
proved by Audi on the front seats.
- Seat covers can prevent the Advanced A ir­
bag System from recognizing child re­
stra ints or occupants on the front passenger
seat and prevent the side airbag in the seat
backrest from deploying properly .
- If a seat heater has been retrofitted or oth- erwise added to the front passenger seat ,
~
261

Airbag syste m
never insta ll any chi ld restraint system on
this seat .
- Never use cushions, pillows, blankets, or
similar items on the front passenger seat .
The add itional layers prevent the capacitive
passenger detection system from accurat ely
measuring the capac itance of the ch ild safe ­
ty seat and/or the person on the seat and
thus keep the Advanced Airbag System from
wor king properly.
- Never place or use any electrical device
(such as a laptop, CD player, elect ronic
games dev ice, power inverte r or seat heater
for child seats) on the front passenger seat
i f the device is conne cted to the 12 -volt
socket or the cigarette lighter socket . Such
devices can influence the capacitance reg is­
tered by the capac itive passenger detection
system, so that incorrect information is pro­
vided to the airbag control unit .
- If you must use a child restraint on the front
passenger seat and the child restraint man­
ufact urer 's instructions require the use of a
towel, foam cushion or something else to
prope rly position the ch ild rest raint, make
c ertain that the
PASSENGER AIR BAG OFF
~; light comes on and stays on whenever
the chi ld restraint is installed on the front
passenger seat .
- If the
PASSENGER AIR BAG OFF,;; light
does not come on and stay on, immediate ly
insta ll child restra int in a rear seating posi­
t ion and have the airbag system inspected
by your Audi dealer.
A WARNING
If the front passenger seat gets wet, dry it im­
mediately.
- If liquid soaks into the front passenger seat, this can keep the a irbag system from work­
ing properly and may , for instance, deact i­
va te the passenger frontal airbag. If this
happens, the
PASSENGER AIR BAG OFF,;;
light will come on and stay on togethe r wi th
the airbag ind icator
light E,I in the inst ru­
men t cl uster.
262
- If liq uid is pooled on the seat, but has not
soaked in, th is may also keep the airbag sys­
tem from working properly and cause the passenger fronta l airbag to be enabled
(turned on), even though there is a p roperly
installed child res traint system on the seat .
Wet towels or o ther we t things on the se at
cushion can have the same effe ct. If the
front passenger fronta l airbag is turned o n,
the
PASSENGER AIR BAG OFF,;; light light
wi ll go out .
How the Advanced Airbag System
components work together
The front Advanced A irbag System and the side
airbags supp lement the protection offered by the
front t hree-point safety belts with pretens ione rs
and load lim ite rs and the ad justab le head re­
strain ts to help reduce t he risk of injury in a wide
r ange of accident and c rash s itu ations. Be sure to
read the important info rmation abou t safety and
heed the WARNINGS in this chapter.
Deployment of the Adva nced A irbag System and
the activa tion of the safe ty belt pretensioners de­
pend on the dece lera tion measured by the crash
senso rs and registered by the electronic contro l
u nit . Crash severity depends on speed and decel ­
eration as well as the mass and stiffness of the
vehicle o r object involved in the crash.
On the passenger side, regard less of safety be lt
use, the front passenger frontal airbag will be
turned off if the e lectr ica l capacitance measured
by the capaci tive passenger detection system on
the front passenger seat is less than the amount
programmed in t he e lectronic control unit . The
front passenger frontal a irbag w ill also be turned
off if the capaci tance measured by the system for
the fron t passenger seat equals that of an infant
of about one year o f age in one o f the chi ld sea ts
that was used to certify the Advanced Airbag Sys ­
tem under Federa l Moto r Vehicle Safety Standard
208. The
PASSENGER AIR BAG OFF,;; light
comes on and stays on to tell you when the front
Advanced Ai rbag System on the passenger side
has been turned off
Q page 265 . .,,.

Airbag syste m
front seat p assenge r's frontal Advanced Airbag.
Th e PAS SENGER AIR BAG OFF~; light:
-will come o n if the front pa ssenger seat is not
occupied;
- will come on if the e lectr ica l capacitance meas­
u red by the c apac itive passenger detec tion sys ­
tem for the front passenger seat equals the
combined capacitance of an infant up to about
one year of age and one of the rearward-facing
or forward-facing child rest raints listed in Fed­
eral Motor Vehicle Safety Standard 208 with
which the Advanced Ai rbag System in your veh i­
cle was certif ied; Fo r a listing of the child re­
straints that were used to cert ify your vehicle's
compliance with the U .S. Safety Standard
c=> page 279.
- will go out if the front passenger seat is occu­
pied by an adult as reg istered by the capacitive
passenger detection system.
- T he
PAS SENG ER AIR BAG OFF~; light must
come on and s tay o n if the ignition is on and . ..
- a car bed has been insta lled on the front pas­
senger seat, o r
-a rearward-fac ing ch ild restrai nt has been in­
stalled on the front passenger seat , or
- a forward-facing child restra int has bee n in stal ­
led on the front passenger seat,
- and if the e lectrical capacitance registered on
the front passenger seat is equa l to or less than
the comb ined capac itance of a typical 1 year­
o ld infant and one of the rearward-fac ing o r
fo rward -fa cing chi ld restrain ts lis ted in Federal
Motor Veh icle Safety Standard 208 with w hich
the Advanced Airbag System in yo ur vehicle was
certified .
If th e fron t passe nger seat is no t occ upied, the
front ai rbag w ill not dep loy, and the
PASSENGER
AIR BAG OFF~;
light wi ll stay on.
Never i nstall a rearward-facing child rest raint on
t he front passenge r sea t, the safes t place for a
chi ld in any k ind of child restraint is at one o f the
seating positions on the rea r seat ¢
page 254,
Child restraints on the front seot -some impor­
tant things to know
and c:> page 2 7 7, Child safe ­
ty .
266
If the PASSENGER AIR BAG OFF~; light
com es on ...
If the PASSENGER AIR BAG OFF~; light comes
on when one of the condit ions listed above is
met, be sure to check the light regularly to make
certain t hat the
PASSENGER AIR BAG OFF~;
light stays on cont inuously whenever the ign ition
i s on . If the
PASSENGER AIR BAG OFF~; light
does not appear on and does not stay on all the
time, stop as soon as it is safe to do so a nd
- reactivate the system by tur ning the ignit ion
off for more than 4 seconds and then tur ning it
on again;
- remove and re install the ch ild restraint. Make
sure that the child restra int is prope rly insta l­
led and that the safety belt for the front pas­
senge r sea t has bee n corre ct ly rou ted th rough
t he child restraint as desc ribed in the ch ild re­
straint man ufact urer's inst ruc tions;
- ma ke sure that the convert ible loc king retr ac­
to r on the safety belt for the front passenge r
seat has been activated and that the safety belt has been pulled tight .
- ma ke sure that no e lectrica l device (s uch as a
laptop , CD p layer , e lectronic games device,
power inverte r or seat heater for chi ld seats) is
placed or used on the front passenger seat if
the device is connected to the 12-volt socket or
the c igarette lighter socket;
- make sure that no seat heater has been retro­
fitted or otherw ise added to the front passen­
ger seat;
- make sure that noth ing can interfere with the
safety belt buckles and that they are not ob­
struc ted;
- make sure that there are no wet objects (such
as a wet towe l) and no water or other liquids on
the front passenger seat cushion .
If the PASSENGER AIR BAG OFF~; light still
does not come on ...
If the PASSENGER AIR BAG OFF~; light st ill
does not come on and does not stay on cont in u­
ous ly (when the ign ition is switched o n),
- take the child restra int off the front passenger
seat and install it properly at one of the rear
ll-

Child safety
A WARNING
Children on the front seat of any car even with
Advanced Airbags can be seriously injured or even killed when an airbag inflates. A child in
a rearward-facing child safety seat installed
on the front passenger seat will be serious ly
injured and can be killed if the front a irbag in ­
flates .
- The inflating a irbag w ill hit the child safety
seat or infant carrier with great force and
will smash the chi ld safety seat and child
against the backrest, center armrest, or
doo r.
- Always install rear-facing child safety seats
on the rear seat.
-If you must install a rearward fac ing ch ild
safety seat on the front passenger seat in
exceptional circumstances and the
PASSEN­
GER AIR BAG OFF~;
light does not come
on and stay on, immediately install the rear ­
facing child safety seat in a rear seating po­
sition and have the airbag system inspected
immediately by your Audi dealer.
A WARNING
- Forward-facing child seats installed on the
front passenger seat may interfere with the deployment of the a irbag and cause serious
personal injury to the child .
- If except ional circumstances require the use
of a forward -facing child restraint on the
front passenger's seat , the child's safety
and well-being require the following special
precautions to be taken:
- Always make sure that the forward-facing
seat has been designed and certified by its
manufacturer for use on a front passenger
seat with a front and s ide a irbag.
-Always carefully follow the manufacturer's instructions provided with the child seat
or infant carrier.
- Never install a child restraint without a
properly attached top tether strap if the
child restraint manufacturer's instructions
require the top tether strap to be used.
278
-Never put the forward-fac ing child re­
straint up against or very near the instru­
ment panel.
- Always set the safety belt upper anchor­
age to the adjustment position that per­
mits proper installation in accordance
with the child restraint manufacturer's in ­
structions .
- Always move the front passenger seat to
the h ighest position in the up and down
adjustment range and move it back to the
r earmos t position in the seat's fore and
aft adjustment range, as far away from
the airbag as possible, before installing
the forward-facing child restraint.
- Always make s ure that the safety belt up­
per anchorage is behind the child restraint
and not next to or in front of the child re­
straint so that the safety belt wi ll be prop­
erly pos itioned.
- Always make sure that nothing prevents
the front passenger's seat from being
moved to the rearmost position in its fore
and aft adjustment range.
- Never place objects on the seat (such as a
laptop, CD player, electronic games de­
v ice, power inverter or seat heater for
ch ild seats). These may influence the elec­
trical capacitance measured by the capaci­
tive passenger detection system and can
also fly a round in an accident and cause
serious personal injury.
- Never place or use any elect rical device
(such as a laptop, CD player, electronic
games device, power inverter or seat heat­
er for child seats) on the front passenger
seat if the device is connected to the 12-
vo lt socket or the cigarette lighter socket.
- If a seat heater has been retrofitted or
otherwise added to the front passenger
seat, never install any child restraint sys­
tem on this seat.
- Make sure that there are no wet objects
(such as a wet towel) and no water or oth­
er liquids on the front passenger seat
cush ion .
- Always make sure that the
PASSENGER
AIR BAG OFF~;
light comes on and stays

Child safety
-The child and the passenger can also in­
jure each other in an accident.
- Never install rear-facing child safety seats
or infant carriers on the front passenger
seat. A child will be seriously injured and
can be killed when the passenger airbag in­
flates -even with an Advanced Airbag Sys­
tem.
- The inflating airbag will hit the child safety
seat or infant carrier with great force and
will smash the child safety seat and child
against the backrest, center armrest, door
or roof.
- Always install rear-facing child safety seats
or infant carriers on the rear seat.
- Make sure there is enough space in front of
the child in the child seat. If necessary, ad­
just the angle and position of the seat in
front of the child seat.
- Forward-facing child safety seats installed
on the front passenger's seat can interfere
with the airbag when it inflates and cause
serious injury to the child. Always install for­
ward-facing child safety seats on the rear
seat.
- If exceptional circumstances require the use
of a forward-facing child restraint on the
front passenger's seat, the child's safety
and well-being require that the following
special precautions be taken:
- Make sure the forward-facing seat has
been designed and certified by its manu­
facturer for use on a front seat with a pas­
senger front and side airbag.
- Always carefully follow the manufacturer's
instructions provided with the child safety
seat or carrier.
- Always move the front passenger seat to the highest position in the up and down
adjustment range and move it back to the
rearmost position in the seat's fore and
aft adjustment range, as far away from
the airbag as possible, before installing
the forward-facing child restraint.
- Always make sure that the safety belt up­
per anchorage is behind the child restraint
and not next to or in front of the child re-
282
straint so that the safety belt will be prop­
erly positioned.
- Always make sure that nothing prevents
the front passenger's seat from being
moved to the rearmost position in its fore
and aft adjustment range.
-Always make sure that the backrest is in
the upright position.
- Never place or use any electrical device
(such as a laptop, CD player, electronic
games device, power inverter or seat heat­
er for child seats) on the front passenger seat if the device is connected to the 12-
volt socket or the cigarette lighter socket.
- If a seat heater has been retrofitted or
otherwise added to the front passenger
seat, never install any child restraint sys­
tem on this seat.
- Make sure that there are no wet objects
(such as a wet towel) and no water or oth­
er liquids on the front passenger seat
cushion.
- Never place objects on the seat (such as a
laptop, CD player, electronic games de­
vice, power inverter or seat heater for
child seats). These may influence the elec­
trical capacitance measured by the capaci­
tive passenger detection system and can
also fly around in an accident and cause
serious personal injury.
- Always buckle the child safety seat firmly in
place even if a child is not sitting in it. A
loose child safety seat can fly around during
a sudden stop or in a collision .
- Always read and heed all WARNINGS when­
ever using a child restrained in a vehicle is
being used<::;>
page 245, Safety belts,
c::> page 253, Airbag system and
c::> page 277, Child safety.
.8. WARNING
To reduce the risk of serious injury, make sure
that the
PASSENGER AIR BAG OFF 11,;; light
comes on and stays on whenever a child re­
straint is installed on the front passenger seat
and the ignition is switched on. .,_

Child safety
seats support the baby's back, neck and head in a
crash
¢ fig. 230.
The airbag on the passenger side makes the front
seat a potentially dangerous place for a child to ride. The front seat is not the safest place for a
child in a forward-facing child seat. It is a very
dangerous place for an infant or a larger child in
a rearward-facing seat .
A WARNING
Not using a child safety seat, using the wrong
child safety seat or improperly installing a
child restraint increases the risk of serious
personal injury and death in a crash.
- Never install rear -facing child safety seats
or infant carriers on the front passenger
seat -even with an Advanced Airbag System.
A child will be seriously injured and can be killed when the inflating airbag hits the
child safety seat or infant carrier with great
force and smashes the child safety seat and child against the backrest, center armrest,
door or roof<=>
page 254, Child restraints on
the front seat -some important things to
know .
-Always install rear-facing child safety seats
or infant carriers on the rear seat.
- Never install a rear-facing child restraint in the forward-facing direction. Such restraints
are designed for the special needs of infants and very small children and cannot protect
them properly if the seat is forward-facing .
- If you must install a rearward facing child safety seat on the front passenger seat be­cause of exceptional circumstances and the
PASSENGER AIR BAG OFF~; light does not
come on and stay on, immediately install
the rear-facing child safety seat in a rear
seating position and have the airbag system
inspected by your Audi dealer.
- Never place or use any electrical device (such as a laptop, CD player, electronic
games device, power inverter or seat heater
for child seats) on the front passenger seat
if the device is connected to the 12-volt
socket or the cigarette lighter socket.
284
- If a seat heater has been retrofitted or oth­
erwise added to the front passenger seat,
never install any child restraint system on
this seat .
- Make sure that there are no wet objects
(such as a wet towel) and no water or other
liquids on the front passenger seat cushion.
- Never place objects on the seat (such as a
laptop, CD player, electronic games device,
power inverter or seat heater for child
seats) . These may influence the electrical
capacitance measured by the capacitive pas­
senger detection system and can also fly
around in an accident and cause serious per­
sonal injury.
- Always read and heed all WARNINGS when­
ever using a child restrained in a vehicle is
being used
¢ page 245, Safety belts,
¢ page 253, Airbag system and
c> page 277, Important information.