2014 AUDI A5 CABRIOLET 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

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
~
0
Fig . 94 Contro l lever with push-bu tton
Fig . 95 D isplay: Selected speed
.,. Pull the lever to position (!)~ fig. 94 to
swit ch the system on .
.,. Drive at the speed to be controlled.
.,. Press button @ to set that speed .
The stored speed and the green symbol
.,
;1; 9 a: .,
"'
II (US model)/ ... (Canadian mode l) are
shown in the display~
fig. 95. The display
may vary, depending on the type of display in
your vehicle.
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 responsib le for
your speed and the distance between
your vehicle and other vehicles.
On the road 83
-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 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 contro l functions re­
main active as long as the indicator light
Ill (US models) !l'I (Canadian models)
is on.
(D Tips
The brake lights illuminate as soon as the
brakes app ly automatically .
Changing speed
.,. To increase/decrease the speed in incre­
ments, tap the lever in the
0 10 direction
~ page 83, fig. 94 .
.,. To increase/decrease the speed quickly, hold
the lever in the
010 direction until the de­
sired 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 resume as soon as you let off of the acce l­
erator pedal.
If, however , you exceed yo ur saved speed by
6 mph (10 km/h) for longer than S minutes,
the cru ise control will be turned off tempora­
rily. The green symbol in the display turns
white. The saved speed remains the same.

Transmission malfunction
Applies to vehicles: with multitronic/S tronic/tiptronic
[i1 Transmis sion: Pr ess brake p edal and se ­
lect gear again .
Press the brake pedal and se lect the des ired
selector lever position aga in . You can then
con tinue dr iv ing .
[i1 Transmi ssion overheating : Please drive
conserv ati vely.
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
perature returns to the no rma l range and the
indicator light switches of .
[i1 Transmission mal funct ion: You can con ­
tinue driving
T here is a system ma lfunction in the transmis ­
sion . You may continue driving . Drive to your
authorized Audi dealer or qualified repair fa­
cility soon to have the malfunction corrected.
[i1 Transmis sion malfunction: Limited driv­
ing funct ionality
There is a sys tem ma lfunction in the transmis­
sion . The transmission is sw itch ing 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
dea ler o r qualified repair facility immediately
to have the malf unction co rrected .
[i11:1 Transmission malfunct ion: No reverse
You can continue d riving
S tron ic transm ission: There is a system ma l­
function in the transmission. T he transmis ­
sion is switch ing to emergency mode. This
mode on ly shifts into certain gears or will no
longer shift at all. The engine may sta ll. You
cannot engage the reverse gear . Drive to your
author ized Audi d ealer or qualifi ed repair fa­
cili ty immed ia tely to have the ma lfunction
c o rre cted.
[i1 Transmi ssion malfunction: Stop vehicle
and shift to park . Transm
ission 91
Do not continue driving. Se lect the P selector
lever posit ion and see your authorized A udi
dealer or qualified repair facility for assis­
tance.
(D Note
If t h e transmission switches to emergency
mode, you should ta ke t he ve hicle to an
a uthorized Audi dea lership as soon as pos­
s ible to have the condition c orrected .
Selector lever emergency release
Applies to vehicles: with multitronic/S tronic/tiptronic
If the vehicle's power supply fails, the selec­
tor lever can be released in an emergency.
Fi g. 101 Fr ont center co nso le : Remov ing t he as htray
in sert
F ig. 1 02 Selector lev er emer gency re le ase
"" To access the emergency re lease mecha ­
nism, remove the ashtray insert @ using the
release sw itch @
c:::> fig. 101.
"" Loosen and remove the cap in the ashtray
mount.
"" You now have access to a p in . Using a screw­
driver or sim ilar ob ject, press the p in down
and hold it i n that position c:::>fig . 102.
"" Now pres s th e re lease but ton and move the
selec tor lever to the N pos it io n. ..,.

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 ¢ page 181, fig. 167 or
¢page 181, fig. 168. Be sure to sw itch ASR
on aga in when yo u no longer need less t rac­
tion .
Anti -lock braking system (ABS)
ABS prevents the wheels from locking up
when braki ng. The veh icle can still be steered
even d uring h ard br aking. Apply ste ady p res ­
sure to the brake pedal. Do no t pump the ped­
a l. A pulsing in the brake peda l indicates t hat
the system is he lping yo u to b rake the vehicle .
Brake assist system
The brake assis t system can decrease b ra ki ng
d ista nce. It incre ases braking power w hen the
d river p resses the brake pedal q uic kl y in eme r­
gency situations . You must p ress and hold the
b rake peda l until the situation is over. In
vehicles w ith adapt ive cru ise contro l", the
brake assist system is more sensit ive if the
d ista nce detected to t he vehicle a head is too
small.
Anti-slip regulation (ASR)
ASR reduces engine power when the drive
wheels begin to spin and adapts the fo rce to
the road condit ions. This makes it eas ier to
start , accelerate and drive up hills.
Electronic differenti al lock (EDL )
The ED L brakes wheels that are spinn ing and
transfers the drive power to the other drive
wheel or whee ls if t he vehicle is equipped with
all-w heel drive*. This function is available up
to about 60 mph (100 km/h).
In extreme cases, EDL automat ica lly switches
off to help keep the bra ke on the braked whee l
from overheating. EDL wi ll switch on again au-tomat
ica lly when conditions have ret urned to
no rma l.
Dynamic steering*
On vehicles wi th dynam ic steering*, ESC he lps
st abi liz e the steer ing in cr itical situ ations.
Electronic interaxle differential lock* /
selective wheel torque control*
T he elec troni c int eraxle differentia l lock (front
whee l dr ive) o r th e se lec tive whee l torque
control (all-whee l dr ive) oper ates when dr iv ­
ing t hro ugh curves. The front wheel on the in ­
side of the c urve or both whee ls on the inside
of the c urve are b raked se lectively as needed.
This m inimizes sliding in the front wheels and
allows for more precise driving through
curves . The applicable system may not acti­
vate when dr iving in wet o r snowy cond itions.
A WARNING
- ESC, ABS, ASR, EDL dynam ic steering*
a nd the ele ct roni c interaxle d ifferential
lo ck* /se lective whee l torque con trol *
cannot ove rcome the laws of physics .
This is especially important on sli ppery
or wet roads.
If the systems beg in acting
to stabilize your veh icle, yo u should im­
mediately change your speed to match
the road and traffic conditions . Do not
let the increased safety prov ided by
these systems tempt you to take r isks.
Doing so will increase the risk of a loss of
veh icle cont ro l, col lision and ser ious pe r­
sonal injur ies.
- Always ada pt your speed to road, traffi c
a nd wea ther conditions. The r isk of los-
ing con trol of the vehicle i ncreases when
d riving too fast, es pec ia lly through
curves and o n slippe ry or wet roads, an d
when dr iv ing too close to vehicles up
ahead. ESC, ABS, the brake ass ist sys­
tem, ASR, EDL dynam ic steer ing* and the
e lectronic inte raxle differentia l lock*/se­
lec tive whee l to rque control* cannot p re-
-
vent co llisi ons. ~

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.
(D 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 conv ert er) is function ­
ing properly to ensure that your vehicle is run­
ning in on env ironm entally sound manner.
,,. Always use lead-free gaso line Q page 201,
Fuel supply .
,,. Never run the tank down a ll th e way to emp ­
ty.
,,. Never put too much moto r oil in your engine
Q page 211 , ~ Adding engine oil .
,,. Never try to push -or tow -start your ve hicle .
T he cata lytic converter is an eff ic ient "clean­
up" device built in to 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 exclus
ive use of unleaded f uel is critica lly
important for the life of the catalytic conv ert­
er and p roper funct ion ing of the eng ine .
A WARNING
=
-The temperature of the exhaust system
is high, both when driving and after stop­
p ing 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 i n
areas where the hot exhaust system may
come in co ntact with dry grass, brush,
fue l 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 he at s hields. Dur ing driv ing, the
substance used fo r undercoating could
overheat and cause a fire.
CI) Note
- Be aware tha t just o ne tank filling with
leaded fu el w ill alre ady ser io usly de ­
grade the performance of the cata lytic
converter .
- Do not exceed the cor rect engine oil level
Q poge 211.
-Do not drive until the fuel t ank becomes
comple tely empty . The engine cou ld mis ­
fire . Unburned fuel could also get into
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 mov ing.
- Do not contin ue to ope rate your veh icle
under these conditions, as otherwise fuel
can reach the catalyt ic converter. Th is
co uld 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. 178 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. 178, ¢ page 208,
fig. 175.
With a cold engine, the coolant Iii>