2013 AUDI A5 CABRIOLET overheating

22 Instruments and warning/indicator lights
the indicator light corresponds with the lo­cation on the vehicle.
This warning can also occur if the light switch
is in an unengaged position between two sym­
bols.
Vehicle lights: System fault!
If the message appears, there is a malfunc­
tion in the headlights or light switch .
Drive to your authorized Audi dealer immedi­
ately to have the malfunction corrected.
A WARNING
- light bulbs are pressurized and could ex­
plode while they are being changed caus­
ing serious personal injury.
- Work with due care when handling the
high-voltage section of gas discharge
(xenon) lights*. Failure to do so could re­
sult in death or serious injury.
{O) Tips
Have the bulb replaced or the connection
repaired by your authorized Audi Service
department.
~(D Headlight range control
Applies to vehicles: with headlight range contro l
II Headlight range control defective !
If the symbol II illuminates, the dynamic
headlight range control is no longer working
properly. Have the system checked and re­
paired at your authorized Audi dealer.
§0 Adaptive Light
Applies to vehicles: with adaptive light
111 Audi adaptive light: defective
If the indicator light turns on and this mes­
sage appears, there is a malfunction in the
adaptive light system. The headlights still
function.
Go to an authorized dealership to have the headlights or the control unit for the adaptive
light repaired .
@? light/rain sensor
Applies to vehicles: with light/ra in sensor
ral Automatic headlights/ automatic wipers
defective
If the indicator light turns on and this mes­
sage appears, the light/rain sensor is not
functioning correctly.
For safety reasons the low beams are turned
on permanently with the switch in
AUTO.
However, you can continue to turn the lights
on and off using the light switch . You can still
control all functions that are independent of
the rain sensor through the windshield wiper
lever .
Contact your authorized Audi dealer as soon
as possible to have the problem corrected.
g Adaptive dampers
Applies to vehicles: with Audi drive select and adaptive
dampers
B Suspension: System fault!
If the B symbol in the display comes on, there
is a malfunction in the adaptive dampers .
Please go to an authorized Audi dealer or oth­
er qualified workshop to have the malfunction
repaired.
!-: Sport differential
Applies to vehicles: with Audi drive select and sport dif­
ferential
Sport differential: System fault!
There is a malfunction with the sport differen­
tial.
Drive to your authorized Audi dealer immedi­
ately to have the malfunction corrected.
Sport differential: Overheating
The transmission temperature has increased
significantly due to the sporty driving manner.
Drive in a less sporty manner until the tem­
perature returns to the normal range and the
indicator light switches of.
ll-

84 On the road
Cruise control
Switching on
The cruise control system makes it possible to
drive at a constant speed starting at 20 mph
(30 km/h).
0
f
®t
0
Fig. 94 Control lever w it h push-button
Fig. 95 Dis pl ay: Selected speed
"' Pull the lever to position (D 9 fig . 94 to
switch the system on.
"' Drive at the speed to be controlled .
"' Press button @ to set that speed.
I :i:. ... a,
The stored speed and the green symbol
lij;(l)~i4 (US model) 1B (Canadian model) are
shown in the display
r:::;, fig. 95. The display
may vary, depending on the type of display in
your veh icle.
The speed is kept constant by modifying en­
gine power or through an active brake inter­
vention.
A WARNING
- Always pay attention to the traffic
around you when the cruise control is in
operation. You are always responsible for
your speed and the distance between
your vehicle and other vehicles. -
For reasons of safety , cruise 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
plan ing) - risk of accident.
- Turn off the cruise control temporarily
when enter ing turn lanes, highway exit
lanes or in constr uction zones .
- Please note that inadve rtently "resting"
your foot on the accelerator pedal causes
the cruise control not to brake. This is
because the cruise control is overridden
by the drive r'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 indicator light
[ff;(l)~i4 (US models) ;B (Canadian mod­
els) is on.
(D Tips
The brake lights illuminate as soon as th e
brakes app ly automatically.
Changing speed
"' To incre ase/decrease the speed in incre­
ments, tap the lever in the
010 direction
r:::;, fig . 94 .
"' To increase/decrease the speed quic kly,
hold the lever in the
010 direction until
the desired speed is displayed.
You can also press the accelerator pedal down
to increase your speed, e .g. if you want to
pass someone. The speed you saved earlier
will res ume as soon as you let off of the acce l­
erator pedal.
If, however, you exceed your saved speed by
6 mph (10 km/h) for longer than 5 minutes,
the cruise control wil l be turned off tempora­
rily. The green symbol in the disp lay turns
white. The saved speed remains the same.

92 Transmission Transmission malfunction
Applies to vehicles: with multitron ic/5 tronic/t iptronic
[O] Transmission: Press brake pedal and se ­
lect gear again .
Press the brake pedal and se lect the des ired
se lecto r lever posit io n again. Yo u can t hen
con tinue dr iv ing.
[O] Transmission overheating: Please drive
conservatively .
The transmission temperature has increased
significantly d ue to the sporty driving manner.
Drive in a less spo rty manne r until the tem­
pera ture ret ur ns to the no rma l range and the
indicator light switches of.
[O] Transmission malfunction: You can con ­
tinue driving
There is a system ma lf u nction in t he transmis­
sion. You may continue driving. Dr ive to your
author ized Audi dealer or qualified repair fa­
cility soon to hav e the mal function cor rected.
[O] Transmission malfunction : Limited driv ­
ing functionality
T here is a system ma lf u nction in the tra nsmis ­
sion. The transmissi on is sw itchi ng to emer­
gency mode . Th is mode only s hifts into cer­
tain gears or will no lo nger shift at a ll. The en­
g ine may stall. Drive to your authorized A udi
dea le r or qualified repair facility immediate ly
to have the ma lf u nct ion co rrected .
[O] lij Transmission malfunction: No reverse
You can continue dr iving
S tron ic ® transmission : There is a system ma l­
f u nction in the transmission. The transmis ­
sion is switc hing to emergency mode. T his
mode on ly shifts into certain gears or w ill no
l onge r shi ft at all. T he e ngine may sta ll. You
can not engage the reverse gear . Drive to your
author iz e d Audi d eal er or qua lified repai r fa­
cili ty im m ed ia tely to have the m alfu nctio n
cor re cte d.
[O] Transmission malfunction : Stop vehicle
and shift to park .
Do not con tinue dr iving. Se lect the P sele ctor
l ever positio n and see your authorized A udi
dealer or qualified repair fac ility fo r assis­
tance.
(D Note
If t h e trans mission swit ches to emergency
mode, yo u should ta ke the ve hicl e to an
a uthorized Audi dea lership as soon as pos­
s ib le to have th e co nditio n co rrected .
Selector lever emergency release
Applies to vehicles: wit h multitronic/5 tro ni c/tiptro nic
If the vehicle's power supply fails , the selec­
tor lever can be released in an emergency.
Fig . 101 Fr on t center co nsole: Remov in g t he as htray
in sert
Fig. 102 Selector lever eme rgency release
.. To access the emergency re lease mecha ­
nism, rem ove the ashtray insert ® using t he
re lease sw itch @¢
fig. 101.
• Loosen and remove the cap in t he ashtray
mou nt.
"' Yo u now have access to a p in. Using a screw­
d river or sim ila r ob ject, press t he p in down
an d ho ld it i n that p osition
~ fig . 102 .
"' No w pre ss the release bu tton and move the
s elec tor l ever to the N po siti on. ..,.

180 Intelligent technology
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
e lectronic interaxle differentia l lock* /selective
wheel torque control* . ESC is switched on all
the t ime. I n certa in s ituations whe n you need
l ess t raction, you can switch off ASR by p ress­
i ng the bu tto n
[ru ¢ fig. 167 or ¢ fig. 168. Be
sure to sw itch ASR on ag ain when you no lon­
ger need less trac tion.
Anti -lock braking system (ABS)
ABS prevents t he wheels from locking up
when braking. The veh icle can still be st eered
even d uring ha rd b rak ing . Apply steady p res­
sure to the br ake pedal. Do no t pu mp the ped­
a l. A puls ing in t he bra ke peda l ind icates that
the system is he lping yo u to b rake the vehicle .
Brake assist system
The brake assist system can decrease bra king
d ista nce. It increases braking powe r w hen the
d river p resses the brake pedal quickl y in eme r­
gency situa tions . You mus t press and ho ld the
brake peda l until the situation is over. In
ve hicles with adaptive cruise contro l", the
brake assist system is more sensit ive if the
d ista nce detected to t he vehicle a head is too
smal l.
Anti-slip regulation (ASR)
ASR reduces engi ne power when the drive
wheels begin to spin and adapts the fo rce to
the road condit ions. This makes it easier to
start, accelerate and drive up hills.
Electronic diffe rential lock (EDL )
The EDL brakes wheels that are spinning and
tra nsfers t he d rive powe r to the other d rive
wheel or whee ls 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 a utomatica lly switches
off to help keep the bra ke on the braked whee l
from overheating. EDL will switch on aga in au­
tomatically when conditions have returned to
normal.
Dynamic steering*
On vehicles wi th dynam ic s teering *, ESC he lps
sta bilize the steer ing in crit ica l sit uat ions.
Electronic interaxle differential lock*/
selective wheel torque control*
T he ele ctroni c in te raxle di fferentia l lock ( fron t
whee l drive) o r th e se lective whee l torque
control (all -whee l drive) operates when driv­
ing t hro ugh cu rves. The front wheel on the in­
s ide of the c urve or both whee ls on the inside
of the curve are braked selectively as needed .
Th is mi nimizes sliding in the front wheels and
allows for more precise d rivi ng through
cu rves . The a ppl icable syste m may not acti­
vate when dr iv ing in wet o r snowy cond itions.
_&. WARNING
- E SC, A BS, ASR, ED L d ynam ic steering *
a nd the elect roni c in ter ax le d ifferenti al
loc k* /se lective whee l torque control *
cannot ove rcome the laws of physics .
This is especia lly important on slippery
or wet r oads. If the systems beg in acting
to stabilize your veh icle, yo u should im­
mediately change you r speed to match
the road and t raff ic conditions. Do not
let the increased safety prov ided by
t hese systems temp t you to ta ke r is ks.
Doing so will increase the risk of a lo ss of
veh icle cont ro l, col lision an d ser io us per­
sonal injur ies.
- Always adapt your speed to ro ad, traff ic
an d wea ther conditions . The risk of los ­
ing contro l of t he vehicle increases when
driving too fast, es pec ially through
curves and on slippery or wet roads, and
when dr iv ing too close to vehicles up
a head. ESC, ABS, the brake ass ist sys­
t e m, ASR, EDL dynam ic s teer ing* and the
elec tronic inte raxle differe ntia l lock*/se­
lective whee l to rque contr ol* cannot p re­
vent co lli sion s.
- Always accelerate wi th special care on
eve n smooth s urfaces su ch as those that
'
ar e we t or covered w ith i ce and snow.
T he drive whee ls can spin even w ith
-
these assistance systems that can not ~

188 Driving and en vironm ent
8_ 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 braking effect.
CD 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 switc h the engine off when driving
t hr ough water.
- Keep in mind that oncoming vehicles
may c reate waves that raise the water
l evel and make it too deep fo r you r vehi­
cle to dr ive through safely.
-
- Avoid dr iving thro ugh salt 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 on environmentally sound manner.
,,. Always use lead-free gasoli ne¢ page 207,
Fuel supply .
,,. Never run the tank down a ll the way to
empty.
,,. Never put too much motor oil in your en-
gine ¢
page 217, "t':::r. Adding engine oil.
,,. Never t ry to push- o r tow-start your veh icle.
The catalytic converter is an effic ient "clean­
up" device built into the exhaust system of
the vehicle. The catalytic converter burns
many of the polluta nts in the exhaust gas be­
fore they are released into the atmosphe re. The exclusive
use of unleaded f uel is critica lly
important for the life of the catalytic convert­
er and proper funct ion ing of the eng ine .
A WARNING
= -
-Do not park or operate the vehicle in
areas where the hot exhaust system may
come in co ntact with dry grass, brush,
fuel spill or other material wh ich can
cause a fire .
- Do not app ly additional undercoating or
r u stp roofing on or nea r the exhaust
manifold, exhaust pipes, cataly tic con­
ver ter or heat shields. Dur ing driv ing, the
substance used for under coa ting co uld
overhea t and cause a fire.
CD Note
- Be aware that just o ne tank filling with
leaded fu el w ill already ser io usly de ­
gr ad e the per form ance o f the catalytic
c onverte r.
- Do not ex ceed t he corre ct engine oil level
r:;!) page 217.
- Do not drive until the fuel tank be co m es
completely emp ty. The engine co uld mis­
fire . Unburned fuel could also get in to
the exhaust system and this co uld cause
the cata lytic converter to overheat .
- Do not turn off the igni tion whi le the ve ­
hicle is mov ing.
- Do not contin ue to ope rate your veh icle
unde r these conditions, as otherwise fuel
can reach the catalyt ic converte r. T his
co uld resu lt 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 p rope rly
and in accordance w ith the se rvi ce rec ­
ommen dat ions in yo ur Warranty &
M ain tenance boo klet.
- L ack of prope r maintenan ce as we ll as
i mprope r use of t he ve hicl e wi ll impair
the func tion of the em ission cont ro l
system and could lea d to damage .
Ill>

Engine cooling system
Coolant
The engine coolant performs two functions: it
keeps the engine from overheating and it pro ­
te cts the engine from freezing in the winter .
The cooling system is sealed and generally re­
qu ires 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-based coolant additive G 13 antifreeze with
anticor ros ion add itives (50% for USA mode ls;
60% for Canadian mode ls). This mixtu re both
assures the ne cessa ry frost prote cti on and
p rotec ts metal components in the engine's
coo ling system from cor ros io n an d scaling. It
a lso raises the boiling point of the coolant.
D o not red uce the con cent ration o f th e coo l­
ant in the summe r by adding plain water .
The
proportion of coolant additive must be at least 50% but not more than 60%
to ma in­
tain antifreeze protection and cooling efficien­
cy. If the coolant frost protect ion is too low,
the coolant cou ld freeze and damage the veh i­
cle heating and eng ine cooling system .
For yea r-round driving, antifreeze is added at
the factory for temperatures down to:
- -3 1 °F (-35°C)USA
- -4 0 ° F ( - 40 °C) Canada.
A WARNING
Before yo u check any thing in the engine
compartment, always read and hee d all
W AR NIN GS
¢ .&. in Working in the engine
compartment on page 212.
(D Note
- Before win ter se ts in, have the coolan t
checked to see if t he coolant ad dit ive i n
your vehicle is suffic ient to meet the cli­
mate cond itions . T hi s is especially imp or­
tant if you live in a regi on whe re the w in­
te r is e xtremely cold. If necessary, in -
Checking and fillin g 219
crease the propo rtion of coo lant add itive
to 60%.
- When adding coolant additive to yo ur
coolin g system , remembe r:
- We reco mmend us ing o nly coola nt ad­
d itive G12++ or G13 for your vehicle .
This coolan t ad ditive is availab le at a u­
thor ized Audi dealers. O ther types of
ant ifree ze can s ignific antly red uce cor­
rosion pro tec tion . The result ing corro­
sion can ca use a loss o f coolan t and se ­
rio us en gine damage.
- D o not add any ty pe of rad iator leak seal­
ant to yo ur vehicle 's engine coolan t.
Adding radiator repair fl uid may adverse ­
ly affect the function and performance of
your cooling system and co uld resu lt in
damage not covered by you r New Ve hicle
Limited War ran ty.
Checking the engine coolant level
The engine coolant level can be checked with
a quick glance.
Fig . 1 78 Eng in e co mpa rtm ent : Cover o n the coo la nt
expans io n t an k
-... ;;; ,; a, m
.. Before yo u check anything in the engine
compartment,
always read and heed all
WARNINGS ¢ & in Working in the engine
compartment on page 212 .
"' Park yo ur vehicle on a lev el su rface .
"' Turn off the ignition .
"' Read t he e ngine coolant level from the
coo lant expan sio n ta nk ¢
fig. 178 ,
¢ fig. 175. With a cold engine, the coolant
level sho uld be between the "MIN " and
"MAX" markings . When the engine is warm,
the level may be slightly above the "MAX"
marking.
Iii>

220 Check ing and filling
The location of the coolant expansion tank
can be seen in the engine compartment illus­
tration ¢
page 214 .
To obtain an accurate read ing, the eng ine
must be switched off .
The expans io n tank in you r vehicle is equipped
with an e lectr ic cool ant level sensor.
When the coolant level is too low, the warning light in the A uto-Check System ¢
page 18 will
b link until you add coo lant and the level has
been restored to no rm al. Even though 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 indicate a leak in the cooling
system. In the event of coolan t loss, the cool ­
i ng system should be inspected immedia tely
by your authorized A udi dealer. It is not
enough merely to add coolant.
I n a
s e aled system, losses can occur only if
the boiling poin t of the coolant is excee ded as
a result of overheating.
A WARNING
The cooling system is unde r pressure 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 cool
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 ve ry carefu lly in
a counter-clockwise direction wh ile ap­
plying light, downward pressure on the
top of the cap .
- To avoid being b urned, do not spill ant i­
freeze or coolant on t he exhaust system
or hot eng ine parts. Unde r certain condi­
tions, t he ethy lene g lycol in engine cool­
an t can ca tch fire.
(D Note
Do not ad d any type of radiator leak sea l­
ant to your veh icle's engine coo lant. Add­
i ng radiator repa ir fluid 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 Veh icle L imited
War ran ty .
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 c> &. in Working in the engine compart ­
ment on page 212.
.. Turn off the engine.
.. Let the engine cool down.
.. Place a thick rag over the coolant expansion
tank ¢
fig. 178 and carefully turn the cap
co unter-clo ckwise ¢,&. .
.,. Add coo lant.
.. Twis t the cap on aga in
t ightly.
Replacement engine coo lant must confo rm to
exact spec ificat ions
¢ page 219, Coolant. We
re commend using on ly coo la nt additive G 12+
+ , G 13 or in an eme rgen cy G12+. Do
not use a
different additive. In an emergency use plain
water until yo u can get the correct additive
and can restore the correct ratio . This shou ld
be done as soon as possible .
If you have los t a cons iderab le amount o f
coolant , then you sho uld ad d cold antifreeze
and cold wate r on ly w hen the engine is cold.
Always use
new engine coo lant when refilling.
Do not f ill coo lant abov e the "MAX" mark . Ex­
cess coo la nt w ill be fo rced o ut thro ugh the
pressure relief valve in t he cap w hen the en­
gine becomes hot.
A WARNING
-= -
-The cooling system is under pressure and
can get very hot. Reduce the risk of ..,.