2014 AUDI A5 COUPE overheating

22 Instruments and warning/indicator lights
&_ 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.
(D Tips
Have the bulb replaced or the connection
repaired by your authorized Audi Service
department.
~(D Headlight range control
Appl ies to vehicles: with headlig ht range co ntrol
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
Appl ies to vehicles: with adaptive light
r!l 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 .
@..D light/rain sensor
Applies to vehicles: with light/rain sensor
II 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.
Q Adaptive dampers
Applies to vehicles: with Aud i drive select and adaptive
dampers
II Suspension: System fault!
If the II symbol in the display comes on,
there is a malfunction in the adaptive damp­
ers. Please go to an authorized Audi dealer or
qualified workshop to have the malfunction
repaired.
H Sport differential
Appl ies to vehicles: with Aud i drive select and spo rt 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.
&_ WARNING
-
Contact your authorized Audi dealer or
qualified workshop if the sport differential is faulty or malfunctioning . The repair
must be performed by trained personnel
using the correct oil in order to ensure
safety.
~ Ignition lock
l3 Ignition lock defective

80 On the road
Warning threshold 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).
Fig. 80 Control lever w it h push-bu tton
Fig. 81 Dis play : Sel ected speed
.. Pull the lever to position(;)¢ fig. 80 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
co ~ 9 a:
l:l
II (US model)/ B (Canadian mode l) are
shown in the display¢
fig. 81. The display
may vary, depending on the type of display in
your vehicle.
The speed is kept constant by modifying en­
g ine power or through an active brake inter­
vention.
A 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, cruise control
should not be used in t he 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 laning) -risk of accident .
- Turn off the cruise control temporarily
when entering 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 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 sw itched
off. The other cruise control functions re­
main active as long as the indicator light
II (US models)/ ... (Canadian models)
is on.
(D Tips
-Veh icles with manual transmiss ion: You
can attain the set speed only if the gear
th at is cur rently engaged will allow it, or
if it does not tax the engine and allows it
to run smoothly. Therefore shift into a
hig her or lower gear in a timely manner.
- Th e 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 80, fig. 80.
.. To increase/decrease the speed quickly, hold
the lever in the
0 10 d irect io n until the de -
sired speed is displayed . ..,.

88 Transmi ssion
when sport mode is sw itched on,
especially when the road is slippery.
- Once you have accelerated, yo u should
switch sport mode
off by pressing the
I ~ OFF I button.
@ Tips
- The transmission temperat ure may in ­
crease significantly after using the Launch Control Program. If that hap­
pens, the program may not be available
fo r a few minutes . It will be availab le
again afte r a cool-down period .
- When accelerating using t he Launch
Control program, all vehicle parts are
subject to heavy loads. This can res ult in
i nc reas ed wea r.
Transmission malfunction
Applies to vehicles: with S tronic/tiptronic
DI Transmi ssion : Pr ess brake pedal and se­
le ct gear again .
Press the brake pedal and se lect the des ired
se lecto r lever posit io n aga in. You can then
con tinue dr iv ing .
DI Transmi ssion overheating: Pleas e drive
conservatively .
The transmission temperature has increased
significantly due to the sporty driving ma nner .
Drive in a less sporty manner unt il the tem ­
pe rat ure retu rns to the no rmal range a nd the
i ndicator light sw itches of.
DI Transmiss ion malfunct ion: 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 qualified repair fa­
cility soon to have the malfunction corrected.
DI Transmission malfunction: Limited driv­
ing funct ionality
There is a system ma lf u nction in the transmis ­
sion. The transmission is switching to emer­
gency mode. Th is mode only shifts into cer­
tain gears or will no longer shift at a ll. The en- gine may sta
ll. Drive to your a uthorized Audi
dealer or qualified repair facility immediately
to have the mal function cor rected .
[O] lit Transmis sion malfunction : No reverse
You can continue driving
S t roni c tra nsmission: The re is a system mal­
f unc tion in the transm ission. The t ransmis ­
s io n is swi tching to emerge ncy mode. This
mode only shifts into ce rtain gea rs or will no
l o nger shift at a ll. The engine may stall. You
cannot engage the reverse gear . Dr ive to your
autho riz ed Aud i dea ler or qualified repa ir fa­
c ili ty immediately to have the malfunction
cor rected .
DI Transmission malfunction: Stop vehicle
and shift to park.
Do not continue dr iving. Se lect the P selector
lever positio n and see your authorized A udi
dealer or qualif ied repai r facility for assis ­
tance.
(D Note
If the transmission switches to emergency mode, yo u should ta ke the vehicle to an
a uth ori zed Audi dea lership as so on as pos­
s ible to have the condition corrected.

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 182, fig. 153 or
~ page 182, fig. 154. 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 emer­
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 181
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-wheel 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*
cannot overcome the laws of physics .
This is especially important on slippery
or wet roads. If the systems begin acting
to stabilize your veh icle, yo u should im­
mediately change your speed to match
the road and traff ic conditions. Do not
let the increased safety provided by
these systems tempt you to take r isks.
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 contro 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* cannot p re-
vent co llisions . ..,.
•
•

A WARNING 1= ~
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 gaso line¢ page 201,
Fuel supply .
"'"Never run the tank down all the way to emp­
ty.
11-Never put too much motor oil in your engine
¢ page 211, ~ 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 18 9
The exclusive use of unleaded fuel is critically
important for the life of the catalytic convert­
er and proper f unct ion ing of the engine.
A WARNING
- The temperature of the exhaust system
is high, both when driving and after stop­
ping the eng ine.
- Never touch the exhaust tail pipes once
they have become hot. This could result in burns.
- Do not park or operate the vehicle in
areas where the hot exhaust system may
come in co ntact with dry grass, br ush,
fue l spill or other material wh ich can
cause a fire .
- Do not apply additional undercoating or
ru stp roof ing on or nea r the exhaust
manifold, exhaust pipes, cataly tic con­
ve rter or heat shield s. Dur ing driving, the
substance used for undercoating could
overheat and cause a fire.
(D Note
- Be aware that just o ne tank filling with
leaded fuel w ill already ser iously de­
grade the performance of the catalytic
converter .
- Do not exceed the cor rect engine oil level
¢ page 211.
-Do not drive until the f ue l t ank becomes
comple tely empty . The engine co uld m is ­
fire . Unburned fuel could also get into
the exhaust system and this co uld cause
the catalytic converter to overheat.
- Do not turn off the ignition while the ve­
hicle is mov ing.
- Do not continue to operate your vehicle
under these conditions, as othe rwise fuel
can reach the catalyt ic converter. Th is
cou ld result in overheating of the con­
verter, requir ing its replacement.
- To assure efficient operation of the Emis -
sion Control System: ..,. •
•

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 specially conditioned water and the
manufacturer's glycol-based coolant addi-
tive G13 antifreeze with anticorrosion addi­ tives (50% for USA models; 60% for Canadian models). This mixture both assures the neces­
sary frost protection and protects metal com­
ponents in the engine's cooling system from
corrosion and scaling.
It also raises the boil­
ing point of the coolant.
Do not reduce the concentration of the cool­
ant in the summer by adding plain water.
The
proportion of coolant additive must be at
least 50% but not more than 60%
to main­
tain antifreeze protection and cooling efficien­
cy. If the coolant frost protection is too low,
the coolant could freeze and damage the vehi­ cle heating and engine cooling system.
For year-round driving, antifreeze is added at
the factory for temperatures down to:
- -31°F(-35°C)USA
- -40 °F ( - 40 °C) Canada.
If you must add coolant, use a mixture of wa­
ter and coolant additive. Mixing the coolant
additive with distilled water is recommended.
& WARNING
Before you check anything in the engine
compartment, always read and heed all
WARNINGS¢ .&.
in Working in the engine
compartment on page 206.
(D Note
- Before winter sets in, have the coolant
checked to see if the coolant additive in
Checking and filling 213
your vehicle is sufficient to meet the cli­
mate conditions. This is especially impor­
tant if you live in a region where the win­
ter is extremely cold. If necessary, in­
crease the proportion of coolant additive
to 60%.
- When adding coolant additive to your
cooling system, remember:
- We recommend using only coolant ad­
ditive G12++ or G13 for your vehicle.
This coolant additive is available at au­
thorized Audi dealers. Other types of
antifreeze can significantly reduce cor­
rosion protection. The resulting corro­
sion can cause a loss of coolant and se­ rious engine damage.
- Do not add any type of radiator leak seal­
ant to your vehicle's engine coolant.
Adding radiator repair fluid may adverse­
ly affect the function and performance of
your cooling system and could result in
damage not covered by your New Vehicle
Limited Warranty.
Checking the engine coolant level
The engine coolant level can be checked with
a quick glance.
Fig. 164 Eng ine compartment: Cover on the coolant
expansion tank
"' Before you check anything in the engine
compartment,
always read and heed all
WARNINGS ¢ .&, in Working in the engine
compartment on page 206.
"'Park your vehicle on a level surface .
.,. Turn off the ignition.
.,. Read the engine coolant level from the cool­
ant expansion tank ¢
fig. 164, ¢ page 208,
fig. 161.
With a cold engine, the coolant Iii>