2011 AUDI A5 CABRIOLET cooling

Warm and cold
systems are available aga in as soon as the energy ba la nce has been
restore d.
& WARNING
Reduced vi sibility is danger ous and can cause accident s.
• For safe d riv ing it i s very important that all windows be free of
ice, snow and condensation.
• Completely familiarize yourself with the proper use and func­
tion of the heating and ventilation sy stem and especially how to
defog and defrost the windows .
• Never u se the wind shield wiper/wa sher system in free zing
weather until you have warmed the wind shield first , u sing the
heating and ventilat ion system . The washer solut ion may freeze
on the wind shield and reduce vi sibility.
0 Note
• If you suspect that the cl imate co ntro l system has been damaged,
switch the system off to avoid furt her damages, and have i t in spe cte d
by a qua lified dealersh ip.
• Repa irs to the A udi a ir condit ioner require special technica l know l­
edge and special tools. Contact an authorized Audi dealer for assis­
t ance.
(I) Tips
• T o avoid adverse ly affecti ng heati ng a nd cooling perform ance and
to prevent condensation on the windows, the air intake in front of the
w inds hield mu st be free of ice, snow and leave s.
• The air flowing out of the vents and througho ut the vehicle's
en tire in terior is di scharge d at the re ar of the vehicle. Ma ke sure tha t
the outlet slots are not covered by clothing, etc.
• Clim ate co ntrol wor ks most effectively if the windows are closed.
However, if the interior of a parked vehicle is extremely hot from the
sun, br iefly ope ning the windows can speed up the cooling p ro cess. •
Applie s to vehicl es: w it h d eluxe auto ma tic climate control plu s
Controls
Th is overview will help you to familiarize yourself with the
climate controls.
Fig . 100 Cli mate c ontrols
The d isp lay shows the se lected temperat ure for the drive r's side on
the left and the selected temperature for the front passenger's side
on t he right.
Functions are set by rotating the contro l or are switched on and off by
t apping the bu tto ns. Th e L ED in the buttons ill umin ates when the
function is active. ..,_

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App lies to veh icles : with delux e auto matic clim ate contro l p lus
Air vents
Air distribution determines the air flow from the indi­
vidual vents .
Fig. 104 Instrument panel: Locat ion of air vents
Vents @and @
-Rotate the thumbwheel located next to the outlet to open
or close it.
- To adjust the direction of the airflow from the outlet,
move the tab in the center of the outlet in the desired
direction . The direction of the air delivered from the vents
can be adjusted horizontally and vertically.
The air outlets are actuated e ither automatically or manually
depending on the operating mode selected. Heated or unheated
fresh air or cooled air flows from vents(!) through @.
Con tro ls a nd e quip ­
m en t Vehicle
OP-eration
(I) Tips
If the climate control is running in cooling mode, air flows main ly
from ve nts @ and @. To ach ieve adequate cooling, you should never
close these vents completely .•
App lies to vehicles : wit h delu xe aut omatic clim ate co ntro l pl us
Rear air vents
The rear air vents are located in the center console.
Rotate the thumbwheel to open and close the vents .
- To adjust the direction of the airflow from the outlet,
move the tab in the center of the outlet in the desired
direction . The direction of the air delivered from the vents
can be adjusted horizontally and vertically.
The air vents are actuated e ither automatically or manua lly
depending on the operating mode selected . Heated or unheated
fresh a ir, or cooled a ir flows from the vents .
The air ven ts to he at the re ar fo otwell are l ocat ed under the front
seats .
(I) Tips
If the climate control is operating in cooling mode , air flows pr imarily
from the vents in the center console . To achieve adequate cooling,
you should never close these vents comp letely. •
Vehicle care Do-it-yourselt service iTechnical data

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Applies to veh icles : wi th d eluxe automat ic clim ate cont rol pl us
Economical use of the climate control
system
Economical use of the climate control system helps save
fuel.
When the climate control system is working in cooling mode,
engine performance is reduced and fuel consumption is
affected. To keep the time the climate control system is on as
short as possible, you should do the following:
- To save fuel, turn off cooling mode by pressing the AC
button (indicator light goes out).
- In addition, if you open the window while driving, turn off
cooling mode by pressing the AC button (indicator light
goes out).
- If the vehicle is extremely hot due to the heat of the sun,
briefly open doors and windows.
~ For the sake of the environment
When you save fuel, you reduce emissions from the vehicle. •
Applies to vehicles: with deluxe automatic climate cont rol plus
Deluxe automatic climate control plus -
basic settings
The basic climate control settings can be adjusted in the
radio or MM!*.
-Select: Function button (CAR]> Climate control switch.
Automatic recirculation
An air quality sensor detects increased concentrations of pollutants
in the outside air and automatically switches to recirculation mode. We recommend that you always keep automatic
recirculation ON to
prevent polluted outside air from entering the vehicle interior.
If the
air quality sensor located in the climate control system detects
polluted outside air, the sensor decides whether the air pollution can
be reduced by the factory-installed pollutant filter or whether it is
necessary to switch to recirculation. With heavy concentrations of
pollutants, the climate control system is switched automatically to
recirculation mode and the supply of outside air is blocked. As soon
as the concentration of pollutants in the outside air drops, fresh air is
supplied to the vehicle interior again.
In the event that the windows fog up during automatic recirculation,
press the
l@I button immediately.
Under certain operating conditions, automatic recirculation is
switched off automatically. When outside temperatures are below
about 50
°F ( + 10 °(), automatic recirculation is limited to
30 seconds. When outside temperatures are below about 30
°F (-
1 °C), automatic recirculation is limited to 15 seconds .
Synchronization
After Synchronization is set to on, all of the subsequent climate
control settings (except for seat heating*) for the driver are trans­
ferred to the front passenger .
Synchronization is canceled when settings are adjusted on the front
passenger's side .•

Trailer towing
"-------------------------------------------------
Trailer load distribution
Be sure the load in the trailer is held securely in pla ce to prevent it
from shifting forward, backward or s ideways.
Never allow a passenger to ride in a trailer => & in "Driving instruc­
tions" on
page 256.
Engine cooling system
Towing a trailer makes the eng ine work harde r. It is important that
the cooling system's performance is up to the additional load. Make
sure that the cooling system has enough fluid.
Tire pressure
When towing a trailer, inflate the tires of your vehicle to the cold tire
pressure listed under "Full load" on the label located either on the
dr iver's side B-pillar (visible when the door is open) or inside the fuel
filler flap . Inflate trailer tires to trailer and tire manufacturers' spec­
ifications.
Lights
The headl ight settings should be checked w ith the trailer attached
before driving off. Check to make sure both vehicle and trai ler lights
are working properly.
Safety chains
Be sure trailer safety cha ins are properly connected from the trailer
to the hitch on the vehicle. Leave enough s lack in the chains to permit
turning corners. When you install safety chains, make sure they will
not drag on the road when you are driving.
T he chains should cross under the trailer tongue to p revent it from
dropping in case of separation from the hitch.
Driving instruct!ons
Driving with a trailer always requires extra care and
consideration.
To obtain the best possible handling of vehicle and trailer,
please note the following:
- Do not tow a loaded trailer when your car itself is not
loaded.
- Be especially careful when passing other veh icles .
- Observe speed limits.
- Do not drive at the maximum permissible speed.
- Always apply brakes early.
- Monitor the temperature gauge .
Weight distribution
Towing a loaded trailer w ith an empty car results in a highly unstable
distr ibution of weight. If this cannot be avoided, drive at very low
speeds only to avo id the r isk of losing steer ing control.
A "balanced" rig is easier to operate and control. Th is means that the
tow vehicle should be loaded to the extent possible and permissible,
wh ile keeping the trailer as light as possible under the c ircumstances.
Whenever possible, trans fer some cargo to the luggage compart ­
ment of the tow vehicle while observing tongue load requirements
and vehicle loading considerations.
Speed
Th e higher the speed, the more difficult it becomes for the driver to
control the r ig . Do not drive at the maximum permiss ible speed.
Reduce your speed even more if load, weather or wind conditions are
unfavorable -part icularly when go ing downhill.
Reduce vehicle speed
immediately i f the trailer shows the slightest
sign of swaying.
Do not try to stop the swaying by accelerating. _,

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Changing the engine oil
The engine oil and oil filter must be changed according to the mileage
(kilometers) and time intervals specified in your vehicle's Warranty
&
Maintenance booklet. Do not exceed these intervals -harmful
deposits from old engine oil can reduce engine performance and can
lead to expensive engine repairs.
Changing the oil at the recommended intervals is so very important
because the lubricating properties of oil decrease gradually during
normal vehicle use. If you are not sure when you have your oil
changed, ask your authorized Audi Service Advisor .
Under some circumstances the engine oil should even be changed
more frequently. Change oil more often if you drive mostly short
distances, operate the vehicle in dusty areas or mostly under stop­
and-go traffic conditions, or when you use your vehicle where temper­
atures stay below freezing point for long periods.
Detergent additives in the oil will make fresh oil look dark after the
engine has been running for a short time. This is normal and is not a
reason to change the oil more often than recommended.
Damage or malfunctions due to lack of maintenance
It is essential that you change your oil at the recommended intervals
using only engine oil that complies with Audi oil standard
VW
502 00 . Your Limited New Vehicle Warranty does not cover
damage or malfunctions due to failure to follow recommended main­
tenance and use requirements as set forth in the Audi Owner's
Manual and Warranty
& Maintenance booklet. Your dealer will have
to deny warranty coverage unless you present to the dealer proof in
the form of Service or Repair Orders that all scheduled maintenance
was performed in a timely manner. •
Safety first
Engine oil consumption
The engine in your vehicle depends on an adequate
amount of oil to lubricate and cool all of its moving parts.
In order to provide effective lubrication and cooling of internal
engine components, all internal combustion engines consume a
certain amount of oil. Oil consumption varies from engine to engine
and may change significantly over the life of the engine. Typically,
engines with a specified break-in period (see~
page 250) consume
more oil during the break-in period than they consume after oil
consumption has stabilized.
Under normal conditions, the rate of oil consumption depends on the
quality and viscosity of the oil, the RPM (revolutions per minute) at
which the engine is operated, the ambient temperature and road
conditions. Further factors are the amount of oil dilution from water
condensation or fuel residue and the oxidation level of the oil. As any
engine is subject to wear as mileage builds up, the oil consumption
may increase over time until replacement of worn components may
become necessary.
With all these variables coming into play, no standard rate of oil
consumption can be established or specified. There is no alternative
to regular and frequent checking of the oil level, see
Note.
If the yellow engine oil level warning symbol in the instrument
cluster _ lights up, you should check the oil level as soon as possible
~ page 284. Top off the oil at your earliest convenience~ page 284.
& WARNING
Before you check anything in the engine compartment, always
read and heed all WARNINGS~
& in "Working in the engine
compartment" on page
280.
Vehicle care Technical data

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in. WARNING
To reduce the risk of personal injury if you must change the engin e
oil in your vehicle your self:
• Wear eye protection.
• To reduce the ri sk of burns from hot engine oil, let the engine
cool down to the touch.
• When removing the oil drain plug w ith your finger s, stay as far
away as possible. Always keep you r forearm parallel to the ground
to help prevent hot oil from runn ing down your arm .
• Drain the oil into a containe r designed for this purpo se, one
large enough to hold at lea st the total amount of oil in your
engine.
• Engine oil is poisonous . Keep it well out of the reach of chil­
dren.
• Continuous contact w ith used eng ine oil is harmful to your
skin. Always protect your skin by washing oil off thoroughly with
soap and water.
0 Note
N ever m ix o il add itives w it h your eng ine oi l. These additives can
damage your engine and adverse ly affect your Audi Limited New
Vehicle Warranty .
ffi For the sake of the environment
• Before chang ing yo ur o il, firs t ma ke s ure you know w here yo u can
proper ly dispose of the used oi l.
• Always dispose of used eng ine o il properly . D o not dump it on
garden soi l, wooded areas, into open streams or down sewage drains.
• Recycle used engine o il by taking it to a used eng ine oil collection
facility in your area, or contact a serv ice stat io n. •
Engine cooling system
Coolant
The engine coo lant performs two functions: i t keeps the
en gine fro m overhe ating and i t protects the engine fr om
fre ezing in th e winter .
The cooling system is sea led and genera lly requ ires little attention .
Th e cool ing sy stem h as been filled at the f actory wit h a permanent
coo lant which does not need to be changed . T he coolant cons ists of a
mixt ure of water an d the manufacturer's glycol -basedcoolant ad di­
tive Gl2++ antifreeze w ith anticorros ion addit ives (50% for USA
mode ls; 60% for Canadian models). This mixture both ass ures the
necessary frost protect ion and p rotects meta l components in th e
eng ine's cooling system from co rrosion an d scaling. It also raises the
boiling point of the cool ant.
Do not red uce the concentration of the coolant in the summer by
add ing p la in water. The proportion of coolant additive must be at
least 50 % but not more than 60 %
to maintai n antifreeze protection
and coo ling efficiency. If the coolant frost pro tect io n i s too low, t he
coo lant co uld free ze and damage t he veh icle heating an d eng ine
coo ling system.
For yea r- round drivi ng , antifree ze is added at t he factory for tempe r­
atures dow n to:
• - 31°F(- 35°C)USA
• -40°F ( -40°C) Canada .
You can mi x the Gl2+ + coo lant additive wit h other additives (G12 + or
Gl2) . Always check with you r autho rized Aud i dea ler .
in. WARNING
Before you check anything in the engine compartment , always
read and heed all WARNINGS =>
& in "Working in the engine
compartment " on
page 280.

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0 Note
• Before winter sets in, have the coolant checked to see if the
coolant additive in your vehicle is sufficient to meet the climate
conditions. This is especially important if you live in a region where
the winter is extremely cold. If necessary, increase the proportion of
coo lant additive to 60% .
• When adding coolant additive to your cooling system, remember:
-We recommend using only coolant additive G12++ (check the
label) for your vehicle. This coolant additive is available at autho­
r iz ed Audi dealers. Other types of antifreeze can s ignificantly
reduce corrosion protection. The resulting corrosion can cause a
loss of coolant and serious engine damage.
• Do not add any type of radiator leak sealant to your vehicle 's
eng ine coolant. Adding radiator repair fluid may adversely 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. 223 Engine
compartment: Coolant
expansion tank
Vehicle OP-eration
Before you check anything in the engine compartment,
always read and heed all WARNINGS=:> & in "Working in
the engine compartment" on
page 280.
-Turn off the ignition.
- Let the engine cool down .
- Place a thick rag over the coolant expansion tank
=:> fi.9. 223 and carefully twist the cap counter -clockwise
=> & .
- Read the engine coolant level in the open coolant expan­
sion tank=:> fig. 223. With a cold engine, the coolant level
should be between the "min" and "max" markings. When
the engine is warm, the level may be slightly above the
"max" marking.
The location of the coo lant expansion tank can be seen in the engine
compartment illustration =>
page 281.
To obtain an accurate reading, the engine must be sw itched off.
The expansion tank in your vehicle is equipped with an electric coolant level sensor.
When the coolant level is too low, the warn ing light in the Auto-Check
System =>
page 31 will blink until you add coolant and the level has
been restored to normal. Even though there is an electric coolant
level sensor, we st ill recommend you check the coolant leve l from
t ime to time .
Coolant loss
Coolant loss may indicate a leak in the cooling system . In the event of
coolant loss , the cooling system should be inspected immediately by
your authorized Aud i dealer . It is not enough merely to add coolant .
In a
sealed system, losses can occur only if the boiling point of the
coo lant is exceeded as a result of overheating . .,
Vehicle care Do-it-yourselt service iTechnical data

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in. WARNING
The cooling system is under pressure and can get very hot. Reduce
the ri sk of scalding from hot coolant by following the se steps .
• Tu rn off the engine and allow it to cool down .
• Protect your face, hands and arms from e scaping fluid and
steam by covering the cap with a large , thick rag.
• Turn the cap slowly and very c arefully in a counter-clockwise
direction while applying light , downward pressure on the top of
the cap.
• To avoid being burned, do not spill antifreeze or coolant on the
exhaust system or hot engine parts. Under certain conditions, the
ethylene glycol in engine coolant can catch fire.
0 Note
Do not add any type of radiator leak sealant to yo ur vehicle 's engine
coo lant. Adding radiator repair fluid may adverse ly affect the func­
tion and performance of your cooling system and could result in
damage no t c ove red by y our New Vehi cle Limited Warr anty. •
Adding coolant
Be very careful when adding engine coolant.
Before you check anyt hing in th e eng ine compartment ,
always read and heed all WARNINGS=> & in "Wor king i n
t h e e ngine compa rtment" on page
280.
-Tur n off the e ng ine.
- Let t he engi ne co ol d ow n.
- Place a t hick rag over the coolant expans ion tank
=> page 2 87, fig . 223 a nd carefully turn the ca p cou nte r­
clo ckwise
=> & .
- Add coo lant .
- Tw ist t he cap o n agai n
tightly.
Replacement eng ine coolant must conform to exact specificat ions
~ page 28 6, "Coolant" . Even in an emergency, if coolant a dditive
Gl2 ++, Gl2+ or Gl2 is not available, do not use a d ifferent add it ive.
Use plain water instead until you can get the correct additive a nd can
restore the co rrect ra tio. This s hould be done as soon as possib le.
If you have lost a considerable amount of coolant, then you shou ld
add co ld a ntifree ze and cold wa ter only when t he e ngine is cold.
Always use
new engine coo lant when refilling .
Do not fill coolant above the "M AX" mark. Excess coo lant wi ll be
for ced out through t he p ress ure relief va lve in t he cap w hen the
eng ine becomes hot .
& WARNING
• The cooling system is under pressure and can get very hot.
Reduce the risk of scalding from hot coolant by following these
steps.
-Turn off the engine and allow it to cool down.
- Protect your face , hands and arms from escaping fluid and
s team by covering the cap with a large, thi ck rag.
- Turn the cap slowly and very carefully
in a counter-clockwise
direction while applying light , downward pre ssure on the top
of the cap.
- To avoid being burned, do not spill ant ifreeze or coolant on
the exhaust system or hot engine parts. Under certain condi­
tions, the ethylene glycol in engine coolant can catch fire .
• Antifreeze is poisonous. Always store antifreeze
in its original
container and well out of the reach of children .
• If you drain the coolant , it mu st be caught and safely stored in
a proper container clearly marked "poison ".
~