overheating AUDI A4 SEDAN 2013 Owners Manual

22 Instruments and warning/indicator lights
If the message appea rs, there is a mal func ­
tion in the headlights or lig ht switch.
Dr ive to yo ur autho rize d Audi deale r i mmedi­
a te ly to have the mal func tion cor re cte d.
8_ WARNING
- Ligh t bul bs are pressurized and co uld ex ­
plode while t hey are being changed caus­
ing ser ious persona l injury.
- W ork w ith due care when handling the
high-volta ge section of gas discha rge
(xenon) lights*. Fai lure to do so could re­
sult in death or se rious i njury.
Have the bulb replaced or t he connection
re paired by yo ur auth o rized Au di Service
department.
~()) Headlight range control
Applies to vehicles: with headlight range control
El Headlight range control defective !
If t he symbo l El il lum inates , the dynam ic
headlight range cont ro l is no longer wo rking
properly . Have the system checked and re ­
pa ired at your author ized Audi dealer.
§0 Adaptive Light
Applies to vehicles: with adaptive light
mil Audi adaptive light : defective
If the indicator light turns on and th is mes­
sage appears, there is a malfunction in the
adapt ive light system. The headlights still
f u nction .
Go to an authori zed dea lership to have the
headlights or the contro l unit for the adapt ive
light repa ired .
~D Light/rain sensor
Applies to vehicles: with light/rain sensor
tfl Automatic headlights / automatic wipers
defective
If the indica to r li ght turns on and this mes ­
sage a ppears, the light/ rain senso r is not
f unct ioning correct ly .
F o r sa fe ty reasons the low be ams are turne d
o n pe rmanen tly with the sw itch in
AUTO.
However, you can conti nue to turn the lights
o n and off using the light switch. Yo u can st ill
control a ll functions that are independent of
the ra in sensor through the w indshield w iper
l ever .
Contact your a uthorized Aud i dea ler as soon
as possible to have the problem co rrected .
Q Adaptive dampers
Applies to vehicles: with Audi drive select
B Suspension : System fault!
If the B symbol in the disp lay comes on, there
is a ma lf u nction in the adaptive dampers.
Please go to an authori zed A udi dealer or ot h­
er qualified wo rkshop to have the malfunct ion
r epaired .
I-: Sport differential
Applies to vehicles: with Audi drive select
Sport differential : System fault!
There is a malfunction with t he sport d iffe ren­
tia l.
Drive to your auth orized A udi dealer immedi ­
ate ly to have the malfunction corrected .
Sport differential: Overheating
The t ransm iss ion t empe ra tur e has in cr eased
s ignific antly due to t he spo rty dr iving manner .
D rive in a less sporty m anner un til the tem­
pera ture re turns to the normal range and the
indicato r light switches of.
8_ WARNING
Contact your author ized Audi dealer or a
q ua lified workshop if the spo rt differential
i s faulty or malfunct io ning . T he repair
must be performed by train ed perso nnel
usi ng the co rr e ct oil in o rder to e nsure
s a fety.

.. Select : ICAR lfunction button> Car systems
control button > Driver assist > Speed
warning.
Warning thresho ld 2 can be set in the speed
range starting from 20 mph to 150 mph (30
km/h to 240 km/h). Settings can each be ad­
justed in intervals of 6 mph (10 km/h).
Cruise control
Switching on
The cruise control system makes it possible to
drive at a constant speed starting at 20 mph (30 km/h).
®
f
®t
0
Fig. 79 Con tro l lev er w it h push-bu tton
Fig. 80 D isplay : S ele ct ed speed
.. Pull the lever to position (D ¢ fig. 79 to
switch the system on.
.. Drive at the speed to be controlled .
.. Press button @to set that speed.
The stored speed and the green symbol
[ij;jl)~i~ (US model)/ .. (Canadian model) are
shown in the display ¢ fig. 80. The display
may vary, depending on the type of display in
your vehicle. The indicator light
[ij;(l)~i~ (US model)/ B (Canadian model) w ill
also light up in the instrument cluster.
On the road 81
The speed is kept constant by modifying en­
gine power or through an active brake inter­
vention.
_& WARNING
- Always pay attent ion to the traffic
around you when the cruise control is in
operation. You are always responsible for
your speed and the distance between
your veh icle and other vehicles .
- For reasons of safety, cru ise control
should not be used in the city, in stop­
and-go traffic, on twisting roads and
when road conditions are poor (such as
ice, fog, gravel, heavy rain and hydro­
p lani ng) -risk of accident.
- Turn off the cruise control temporarily
when enter ing turn lanes, highway exit
lanes or in construction zones .
- Please note that inadvertently "resting"
your foot on the accelerator pedal causes
the cruise control not to brake. This is
because the cruise control is overridden
by the driver's acceleration .
-If a brake system malfunction such as
overheating occurs when the cruise con­
trol system is switched on, the braking
function in the system may be switched off. The other cruise control functions re­
main active as long as the indicato r light
lijj(l )~i~ (US models) li'I (Canadian mod­
e ls ) is on.
@ Tips
-Veh icles with manual transmiss ion: You
can attain the set speed only if the gear
that is currently engaged will allow it, or
if it does not tax the engine and allows i t
to run smoothly. Therefore shift into a
higher or lower gear in a timely manner.
- The brake lights illuminate as soon as
the brakes apply automatically.
Changing speed
.. To increase/decrease the speed in incre­
ments, tap the lever in the
0 10 direction
¢ page 81, fig. 79. Ill>

88 Transmission
Manual shift program
Applies to vehicles: with multitronic or tiptron ic
Using the manual shift program you can
manually select gears .
Fig. 85 Center console : shift ing t he multitro nic/t ip ·
tronic manual ly
Fig . 86 Steering wheel: Shift buttons
Gear selection with selector lever
"' N
N
~
" a> CD
The tiptronic mode can be selected either with
the vehicle stationary or on the move .
.,. Push the selector lever to the right from
DI
S. As soon as the transmission has switched
over , the selected gear appears in the dis­
play.
.,. To upshift, push the selector lever forward
to the plus position
0 ¢ fig. 85 .
.,. To downshift, push the lever to the minus
position
0 -
Gear selection with paddle levers*
The shift buttons are activated when these­
lector lever is in D/S or the tiptronic manual
shift program.
.,. To upshift, touch the button on the right
0
¢fig . 86.
.,. To downshift, touch the button on the left
0-
When accelerating, the transmission will au­
tomatically shift into the next gear before the
engine reaches its maximum RPM .
If you apply a light throttle when accelerat­
ing, tiptronic will automatically shift from 1st
to 2nd gear to save fuel. If you apply a heavy
throttle, the transm iss ion will stay in 1st gear
until near maximum RPM is reached, or until
the driver shifts into 2nd gear .
If you take your foot off the accelerator pedal
when driving down a steep incline, tiptronic
will downshift from the selected gear into the
next lower gear until it reaches 1st gear,
based on road speed and engine RPM . Auto ·
matic downshifting is interrupted as soon as
you apply the throttle again .
(D Tips
-When you shift into the next lower gear,
the transmission will downshift only
when there is no possibility of over-rev­
ving the engine.
- When the kick-down comes on, the
transmission will shift down to a lower
gear, depending on vehicle and engine
speeds .
- Tiptronic is inoperative when the trans­
m ission is in the fail-saf e mode.
Transmission malfunction
Applies to vehicles: with mult itronic or tiptronic
[O] Transmission: Press brake pedal and se­
lect gear again .
Press the brake pedal and select the desired
selector lever position again. You can then
continue driving.
[O] Transmission overheating: Please drive
conservatively.
The transmission temperature has increased
s ignificantly due to the sporty driving manner.
Drive in a less sporty manner until the tern·
perature returns to the normal range and the
indicator light switches of.
[O] Transmission malfunction: You can con-
tinue driving ..,.

@ Tips
-The t ransm ission tempe rat ure may in­
crease significantly after using the l a unch control prog ram. If that happens,
the program may not be availab le for a
few m inutes . It will be ava ilab le aga in af­
te r a coo l-down period .
- When accelerating us ing t he Launch
Control program, all vehicle parts a re
subjec t to heavy loads. This can res ult in
i n cre ased wea r.
Transmission malfunction
Applies to vehicles: with S tronic transmission
[O] Transmission: Press brake pedal and se­
lect gear again.
P ress th e brake pedal and se lect t he des ired
selec to r lever posi tion aga in. You can then
c o ntinue dr iv ing .
[O] Transmission overheating: Please drive
con servatively.
The transmission temperature has increased
sign ificantly due to the sporty dr iving manner .
Drive in a less spo rty manner unt il the tem­
pe rat ure retu rns to the norma l range and the
i nd icator light switches of.
[O] Transmission malfunction: You can con­
tinue driving
There is a system ma lf u nction in the transmis­
sion. You may continue driving. Drive to your
author ized Audi dealer or qua lified repair fa­
cility soon to have the malfunc tion cor rected .
[O] Transmission malfunct ion: Limited driv ­
ing funct ionality
There is a system ma lf u nction in the transmis­
sion. The transmission is sw itching to emer ­
gency mode. This mode only shifts into cer ­
tain gears or will no longer shift at a ll. The en­
g ine may stall. Drive to your authorized A udi
dealer o r qualified repair facility immediately
to have the ma lfunction co rrected .
[O] lij Transmission malfunction: No reverse
You can continue driving
Transm ission 95
T he re is a system mal func tion in the t ransmis ­
sion . The transm ission is switching to eme r­
gency mode . This mode on ly shifts into cer ­
ta in gears or will no longer shift at al l. The en ­
gine may sta ll. You cannot engage t he reverse
gear. Drive to your author ized Audi dealer or
qualified repa ir facili ty immed iately to have
the malfunction cor rected.
[O] Transmission malfunction : Stop vehicle
and shift to park.
Do not continue dr iv ing. Se lect the P selector
lever posit io n and see your authori zed A udi
dealer or qualified repair facility for assis­
tance.
(D Note
If the transmission switches t o emergency
mode, you should take t he ve hicle to an
a uth orized Audi d ea lership as soon as pos­
sible to have the con dit ion corrected .
Selector lever emergency release
Applies to vehicles: with S tronic transmission
If the vehicle's power supply fails , the selec ­
tor lever can be released in an emergency.
Fig . 94 Fro nt cente r co nso le : Remov ing t he as htray in ·
sert
Fi g. 9 5 Selecto r lever e merge ncy release

ESC includes and/or works together with the
anti-lock brake system (ABS), brake assist sys ­
tem, anti -slip regulation (ASR) , e lectronic dif­
ferential lock (EDL), dynamic steering* and electronic i nteraxle differential lock* /selective
wheel torque control* . ESC is switched on all
the t ime. I n certain s ituations when you need
less traction, you can switch
off ASR by press­
i ng the button~~
page 186, fig. 159 or
~ page 186, fig. 160. Be sure to sw itch ASR
on again when you no longer need less trac­
tion.
Anti-lock b ra king s ystem (ABS)
ABS prevents the wheels from locking up
when braking. The vehicle can still be steered
even d uring hard brak ing . Apply ste ady p res­
sure to the brake pedal. Do not pump the ped­
a l. A pulsing in the brake peda l indicates t hat
the system is he lping you to brake the vehicle .
Brake assist system
The brake assist system can decrease bra king
d istance. It increases braking power when the
d river presses the brake pedal quick ly in eme r­
gency situations . You must press and hold the
brake peda l until the situation is over. In
veh icles w ith adaptive cru ise contro l*, the
brake assist system is more sensit ive if the
d istance detected to the veh icle ahead is too
small.
Anti- slip regulati on (ASR)
ASR reduces engine power when the drive
wheels begin to spin and adapts the force to
the road condit ions. This makes it eas ier to
start, accelerate and drive up hills.
Elect ronic diffe renti al lo ck (EDL )
The ED L brakes wheels that are spinning and
transfers the drive power to the other drive
wheel or wheels if the vehicle is equipped with
all-wheel drive*. This function is available up
to about 60 mph (100 km/h) .
In extreme cases, EDL automatica lly switches
off to help keep the brake on the braked whee l
from overheating. EDL w ill switch on again au-
Intellig ent technolog y 185
tomat ica lly when conditions have returned to
norma l.
Dynamic steering*
On vehicles with dynam ic steering*, ESC helps
stab il ize the s teer ing in crit ica l sit uat io ns.
Electronic interaxle differential lock* /
selective wheel torque control*
T he electronic i nteraxle differential lock (front
whee l dr ive) or the se lective whee l to rque
control (all-whee l dr ive) opera tes when dr iv­
ing thro ugh curves. The front wheel on the in­
side of the c urve or both whee ls on the inside
of the curve are braked selectively as needed .
This min imizes sliding in the front wheels and
allows for more precise driving through
cu rves . The applicable system may not acti­
vate when dr iv ing in wet or snowy conditions.
A WARNING
- ESC, ABS , ASR, EDL dynam ic steering*
a nd the elect ronic interaxle differential
loc k* /se lective wheel torque control*
function cannot overcome the laws of
physics. This is especially important on
slippery or wet roads . If the systems be­
gin acting to stabilize your vehicle, you
should immediately change yo ur speed
to match the road and traff ic conditions.
Do not let the increased safety provided
by these systems tempt you to take risks .
Doing so will increase the risk of a loss of
veh icle contro l, col lision and ser ious per­
sonal injuries.
- Always adapt your speed to road, traffi c
and wea ther conditions. The risk of los­
ing con tro l of the vehicle increases when
driving too fast, espec ially through
curves and on slippery or wet roads, and
when dr iv ing too close to vehicles up
ahead. ESC, ABS, the brake ass ist sys­
tem, ASR, EDL dynam ic steering* and the
electronic interaxle differentia l lock*/se­
lective whee l torque control* function
cannot prevent collisions.
•
•

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 braking carefully to re­
store the full brak ing effect.
([) Note
Vehicle components such as the engine,
transmiss ion, suspension or electrical sys­
tem can be severely damaged by driving
through wate r.
@ Tips
- Check the depth of the water before dr iv­
i ng through it.
- Do not stop the veh icle, dr ive in reverse
or switch the engine off when driving
th rough water.
- Keep in mind that oncoming vehicles
may create waves that raise the water
level and make it too deep for you r vehi­
cle to drive th rough safely.
- Avoid dr iving through sa lt water because
i t can ca use corrosion.
Catalytic converter
It is very important that your emission con­
trol system (catalytic converter) is function ­
ing properly to ensure that your vehicle is run­
ning in an environmentally sound manner.
11-Always use lead-free gasoline q page 210,
Fuel supply .
"'" Never run the tank down a ll the way to
empty.
11-Never put too much motor oil in your en-
gine
q page 220, ~ Adding engine oil .
11-Never try to push -or tow-start your veh icle .
The catalytic converter is an efficient "clean­ up" device built into the exhaust system of
the vehicle . The catalytic converter burns
many of the pollutants in the exhaust gas be­
fore they are released into the atmosphere .
Drivin g and en vironm ent 193
The exclusive use of unleaded fuel is critically
important for the life of the catalytic convert­
er and proper funct ion ing of the engine.
A WARNING
-
- Do not park or operate the vehicle in
areas where the hot exhaust system may
come in contact with dry grass, brush,
fuel spill or other mate rial wh ich can
cause a fir e.
- Do not apply additional undercoating or rustp roof ing on or near the exhaust
manifold, exhaust pipes, catalytic con­
ve rter or heat shields. During driv ing, the
substance used for undercoating co uld
overheat and cause a fire.
(D Note
- Be aware that just one tank filling with
leaded fu el w il l already ser iously de­
gra de the performance of the catalytic
c onverte r.
- Do not ex ceed t he cor rect eng ine oil level
qpage 220.
- Do not drive until the fue l tank becomes
comple tely empty. The engine co uld m is­
fire . Unburned fuel could also get in to
the exhaust system and th is co uld cause
the catalytic converter to overheat .
- Do not turn off the ignition while the ve ­
hicle is moving.
- Do not continue to ope rate your veh icle
unde r these conditions, as otherwise fuel
can reach the catalytic converte r. T his
cou ld result in overheating of the con­
verter, requir ing its replacement.
- To assure efficient operation of the Emis ­
sion Control System:
- H ave you r vehicle maintained prope rly
and in accorda nce w ith the serv ice rec­
ommendat ions in yo ur Warranty &
M ain tenance boo klet.
- L ack of prope r maintenance as we ll as
improper use of the vehi cle w ill impair
the function of the em ission contro l
system and could lead to damage . ..,. •
•

222 Check ing and filling
Engine cooling system
Coolant
The engine coolant performs two functions: it
keeps the engine from overheating and it pro ­
tects the engine from freezing in the winter .
The cooling system is sealed and generally re­
quires little attention.
The cooling system has been filled at the fac­
tory with a permanent coolant which does not need to be changed. The coolant consists of a
mixture of water and the manufacturer's gly ­
col-basedcoolant additive G 13 antifreeze with
anticorrosion add itives (SO% for USA mode ls;
60% for Canadian models). This mixture both
assures the necessary frost protection and protects metal components in the engine's
cooling system from corrosion and scaling. It
a lso raises the boiling point of the coolant .
Do not reduce the concentration of the coo l­
ant in the summer by adding plain water .
The
p ro po rti on of c ool ant add it iv e mu st b e at
lea st 50 % but not mo re th an 60%
to main­
tain antifree ze protection and cooling efficien­
cy. If the coolant frost protect ion is too low,
the coolant could freeze and damage the veh i­
cle heating and eng ine cooling system .
For year-round driving, antifreeze is added at
the factory for temperatures down to:
- -31° F(-3S°C)USA
- - 40 ° F ( - 40 °C) Canada.
_& WARNING
Before yo u check anything in the engine
compartment, always read and heed all
WARNINGS
¢ &. in Working in the engine
compartment on page 215.
(]) Note
-
- Before winter sets in, have the coolant
checked to see if the coo lant additive in
your vehicle is s uffic ient to meet the cli­
mate cond it ions . Th is is especially impor­
tant if you live in a region where the w in­
ter is extremely cold . If necessary, in- crease the p
roportion of coo lant additive
to 60%.
- When adding coolant additive to your
cooling system, remember:
- We recommend us ing on ly coolant ad­
d itive G12++ or G13 for your veh icle .
This coolant additive is availab le at au­
thor ized Audi dealers. Other types of
ant ifreeze can s ignificantly reduce cor­
rosion pro tection. The resulting cor ro­
sion can cause a loss o f coolant and se ­
rious engine damage.
- Do not add any type of rad iator leak seal­
ant to yo ur vehicle's engine coolant .
Adding radiator repair fl uid may adverse ­
ly affect the function and performance of
your cooling system and cou ld resu lt in
damage not covered by your New Veh icle
Limited Warranty.
' Checking the engine coolant level
The engine coolant level can be checked with
a quick glance.
F ig. 170 En gin e compa rtm en t: Cover o n the coo la n t
expans io n ta nk
-"' -"' >< .,
"'
.. Before yo u check anything in the engine
compartment,
alwa ys read and heed all
W ARNINGS ¢ .&. in Working in the engine
compartment on page 215 .
.,. Park your vehicle o n a level surface .
.,. Tu rn off the ignition .
.. Read t he engine coolant level from the
coo la nt expansion tank ¢
fig. 170 ,
r=:> page 217, fig . 167. With a cold engine,
the coolant leve l should be between the
"MIN" and "MAX" markings . When the en­
gine is warm, the level may be slightly above
the "MAX" marking.
IJII,

The location of the coolant expansion tank
can be seen in the engine compartment illus­
tration
q page 217 .
To obtain an accurate read ing , the eng ine
must be switched off .
The expa nsion tank in you r vehicle is equipped
with an elec tric coolant level sensor.
When the coolant level is too low, the warning
light in the Auto-Check System
q page 18 wi ll
b lin k until you add coo lant and the level has
been restored to norma l. Even t hough the re is
an e lec tric coolant level sensor, we s till rec ­
ommend you check the coolant leve l from
time to time .
Coolant loss
Coolant loss may indi cate a leak in the coo ling
sys tem. In the event of coolant loss, the cool­
ing system should be inspected immedia tely
by your authorized A udi dealer. It is not
enough merely to add coolant.
I n a
s ealed system, losses can occur only if
the boiling point of the coolant is exceeded as
a result of overheating.
A WARNING
The cooling system is unde r press ure and
can get ve ry hot. Reduce the risk of sca ld­
ing from hot coolant by following these
steps.
- Turn off the engine and allow it to coo l
down.
- Protect yo ur face, hands and arms from
escaping fluid and steam by covering the
cap with a large, thick rag.
- Turn the cap slowly and very carefu lly in
a counter-clockwise direction wh ile ap­
plying light, downward pressure on the
t op of the cap .
- To avoid being bu rned, do not spill ant i­
freeze or coo lant on the exhaust system
o r hot eng ine parts . Unde r certai n condi­
t ions, the ethy lene g lycol in engine cool­
an t ca n catc h fire.
Checkin g and fillin g 223
@ Note
Do not ad d any type of radiator leak sea l­
ant to your ve hicle's engine coolant. Add ­
i ng radiator repa ir flui d may adverse ly af­
fect the funct ion and performance of your
cooling system and could result in damage not cove red by your New Vehicle l imi ted
Warranty .
Adding coolant
Be very careful when adding engine coolant.
Before you check anyth ing in the eng ine com ­
partment,
always read and heed all WARN­
INGS q & in Working in the engine compart ­
ment on page
215 .
.,. Turn off the engine.
.,. let the engi ne cool down.
.,. Place a thick rag over the coolant expansion
tank
q page 222, fig . 170 and carefully turn
the cap counter-clockwise
q &_ .
.,. Add coo la nt.
.,. Twist the cap o n aga in
tightly.
Rep lacement engine coo lant must confo rm to
exact spec ificat ions
q page 222, Coolant. We
recommend using on ly coo lant additive G 12+
+ , G 13 or in an eme rgency G12+. Do
not use a
different additive. In an emergency use pla in
water until you can get the correct additive
and can restore the correct ratio . This sho uld
be done as soon as possible.
If you have los t a cons iderab le amount o f
coolant , then you sho uld add cold antifreeze
and co ld water on ly when the engine is cold.
A lw ays use
new engine coo lant w hen refilling.
Do not f ill coo lant above t he "MAX" mark. Ex­
cess coola nt w ill be fo rced o ut through t he
pressure relief valve in the cap when the en­
gine becomes hot.
A WARNING
- The cooling system is under pressure and
can get very hot. Reduce the risk of ..,.
•
•