2008 AUDI A4 AVANT air condition

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prevent the formation of harmful deposits, sometimes called
"sludge", that over time can lead to expensive repairs.
At the time of printing, engine oils available in the U .S . and Canada
that meet the exacting specifications of Audi oil standard VW 502 00
are synthetic engine oils. This does not mean, however, that every
synthetic engine oil will meet Audi oil standard VW 502 00. So
always be sure that you use an approved oil.
To help prevent the formation of harmful deposits use only oil with
the following specifications printed on the oil container:
Audi oil standard VW 502 00
Oil container labels may carry the specification singly or in combi­
nation with other designations and oil quality standards.
Viscosity
Engine oils are graded according to their viscosity. The proper
viscosity grade oil for your engine depends on climactic or seasonal
condi tions where you drive. You can use oil wi th a viscosity grade of
SAE 5W40 across all temperature ranges for normal driving condi­
tions .
However, if engine oil viscosity grade SAE 5W40 is not available, you
can also use viscosity grade SAE 5W-30 or SAE 0W-40 as long as it
meets Audi oil quality standard VW 502 00 specifications.
Because engine oil that meets the Audi oil standard may not be
available everywhere when you need it, we strongly recommend
that you always carry with you an extra quart (liter) of oil that
expressly conforms to the VW 502 00 specification, in case you have
to top off the oil while on the road.
Only if the level of the oil is at or below the minimum mark on the
oil dipstick -and no oil that expressly conforms to Audi oil standard
VW 502 00 specifications is available - may you top off with a high
quality engine oil, preferably synthetic -based , that meets ACEA A3,
ACEA A5 or ACEA B5, API SL or ILSAC GF -3 specifications, but even
then, only in viscosity grades SAE 5W -40, SAE 5W -30, or SAE 0W -40 .
However, during the entire time between oil change intervals, never top off with more than a total of 0
.5 qt/liter engine oil that does not
conform to Audi oil specification VW 502 00.
For more information about engine oil that has been approved for
your vehicle, please contact either your authorized Audi dealer or
Audi Customer Relations at 1 (800) 822-2834 or visit our web site at
www.audiusa.com or www.audicanada.ca. Here you will also find a
current list of oils (manufacturers, brand names etc.) that conform
to Audi oil standard VW 502 00.
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
Maintenance & Warranty booklet. Do not exceed these intervals -
harmful deposits from old engine oil can reduce engine perfor­
mance 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
temperatures 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
maintenance and use requirements as set forth in the Audi Owner's
Manual and Maintenance & Warranty booklet. Your dealer will have
to deny warranty coverage unless you present to the dealer proof in
.,_

Checkin g a nd fillin g --------------~~~-
the form of Service or Repair Orders that all scheduled maintenance
was performed in a t ime ly manner .•
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 prov ide effect ive lubrication and cool ing of in ternal
engine components, all internal combustion engines consume a
certain amount of o il. Oil consumption varies from engine to engine
and may change significantly over the life of the engine . Typically,
eng ines wi th a specified break -in period
(see ~ page 243) consume
more oil during the break -in period than they consume after oi l
consumption has stabi lized .
Under norma l condit ions, the rate of o il consumption depends on
the quality and viscosity of the oil, the RPM (revo lutions per minute)
at whic h the engine is operated, t he amb ient te mperature and road
conditions. Further factors are the amount of oil dilution from water
condensatio n or fuel residue and t he oxidation level of the o il. As
any engine is subject to wear as mileage builds up, the oil consump ­
t ion may increase over time until rep laceme nt of worn components
may become necessary .
With all these variables coming into play, no standard rate of oil consu mption can be estab lished or specified. T here is no a lternative
to regu lar and frequent checking of the oil level, see
Note .
If the yellow eng ine o il level warni ng symbol in the instrument
cluster ~ lights up, you should check the oil level as soon as
possible
with the oil dipstick ~ page 277 . Top off the o il at your
earl iest
convenience~ page 278.
& WARNING
Bef ore you che ck anything in the eng ine comp artment , alway s
read and heed all WARNINGS
~ & in "Working in the engine
c ompartment " on
page 27 3.
0 Note
Driving with an insuff ic ient oil level is l ikely to cause severe damage
to the engine.
[ i ] Tip s
• The oil pres sure warning displ ay "e:7: is n ot an indi cator of the oil
level . Do not rel y on it. Instead, check the oil level in your engine at
regular inter vals, preferably ea ch time you refuel , and al way s before
going on a long trip.
• If you have the impression your engine consumes excessive
amounts of oi l, we reco mmend that you consult your Audi dealer to
have the cause of your concern properly diagnosed . Keep in mind
that t he accurate measurement of oil consumptio n requ ires great
care and may take some time. Your Audi dealer has instructions
about how t o measure oil cons umpt ion accurately. •
Checking the engine oil level
Vehicle care
Fig. 2 07 Illu strati on of
prin ciple 1: M ark ers on
oil dip sti ck ...

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le as t 50 % but not more th an 60 % to maintain antifreeze protection
and cooling efficiency . If the coolant frost protection is too low, the
coolant could freeze and damage the vehic le heating and engine
cooling system.
For year -round driving, antifreeze is added at the factory for temper­
atures down to :
•
-31 °F (- 35 °C) USA
•
-40 °F ( -40 °C) Canada.
You can mix the G12 + coolant additive with other additives (for
examp le G11 or G12) . Always check with your authorized Audi
dea ler.
& WARNING
Bef ore you check anything in the eng ine comp artm ent , a lw ays
re ad and h eed all W ARNING S
=> & in "Worki ng in the engine
c ompartm en t" on
page 273.
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 coolant 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 coo lant additive is avai lable at autho ­
rized Audi dealers . Other types of antifreeze can significantly
reduce corrosion protect ion. The resulting corrosion can cause a
loss of coolant and serious engine damage.
• Do no t add any type of radiator leak sealan t to you r vehicle's
engine coolant . Adding radiator repair fluid may adversely affect the function and performance of your cooling system and could result
in damage not covered by yo ur New Vehicle Limited Warranty. •
Checking the engine coolant level
The engine coolant level can be checked with a quick
glance.
F ig . 211 E ngine
co mpa rtm ent: Co olan t
e xp an sion tan k
Before you che ck a ny thing in the e ng ine compar tmen t,
alway s read and heed all
WARNINGS => & in "Working in
t h e engine compartment" on
page 273.
Turn off the ignitio n.
Let the engine cool down.
P lace a t hick rag over the coo lant expans ion tank
=> fig. 211 and carefully twist the cap counter-clockwise
=>& . ...
Ve hic le care irechnical data

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-Read the engine coolant level in the open coolant expan­
sion
tank => fig. 211. 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 coolant expansion tank can be seen in the
engine compartment
illustration=> page 275 .
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 warning 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 still recommend you check the coolant level
from time 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 immedi­
ately by your authorized Audi dealer . It is not enough merely to add
coolant.
In a
sealed system, losses can occur only if the boiling point of the
coolant is exceeded as a result of overheating.
& 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
steam by covering the cap with a large, thick rag.
& WARNING (continued)
• Turn the cap slowly and very carefully 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 your vehicle's engine
coolant. Adding radiator repair fluid may adversely affect the func ­
tion and performance of your cooling system and could result in damage not covered by your New Vehicle Limited Warranty. •
Adding coolant
Be very careful when adding engine coolant.
Before you check anything in the engine compartment,
always read and heed all WARNINGS => & in "Working in
the engine compartment" on
page 273.
-Turn off the engine.
-Let the engine cool down.
-Place a thick rag over the coolant expansion tank
=> page 281 , fig. 211 and carefully twist the cap counter­
clockwise
=> & .
-Add coolant.
-Twist the cap on again tightly.
Replacement engine coolant must conform to exact spec ifications
=> page 280, "Coolant". If in an emergency coolant additive G12 + is .,,

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Ap plies to vehi cles: with ma gic e ye batte ries
Checking the battery acid level on magic eye
batter ies
The battery acid level in the battery can be checked
through the clear inspection window.
F ig . 2 14 En gin e
co mpa rtme nt: B atte ry
w it h m agic eye
(battery cov er
r e m ove d)
On top of the battery, there is a round "window" . This
window (m agic eye) changes color as the battery cha rge
and acid level change .
- Read and heed all
WARN INGS=> & in "Working on the
battery" on
page 286
- Read the ac id level from the window on the battery
=> page 288, fig. 214.
Air bubbles in the window can cause an inaccurate reading . Care­
ful ly tap on the side of the window .
• If the window is
gre e n, the battery acid level is correct .
• I f the window has
no c olor or is bright y ello w, the battery acid
level is too low . Have the battery tested by your authori zed Audi
dea ler or a qualified workshop. •
If the window is
blac k, then the battery is insufficiently charged .
Recharge the battery as soon as possible
=> page 289 .
Under normal opera ting conditions, the battery in your Audi does
not need any maintenance.
At high outside temperatures it is advisable to check the battery acid level at regular intervals through the transparent battery
housing . Also check the acid level each time you charge the battery.
We recommend you have your authorized Audi dea ler test your
battery.
A battery that is older than five years and has a low acid level should
be rep laced.
0 Not e
Do not overfill the battery , otherwise battery acid will overflow
t hrough the vent opening. This can damage the paint and cause
corrosion .•

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The recommended tire pressures for your Audi depend on the kind
of tires on your vehicle and the number of passengers and/or
amount of luggage you will be transporting.
The tire pressure label located either on driver's side 8-pillar or
inside the fuel filler flap on your Audi lists the recommended cold
tire inflation pressures for the vehicle at its maximum capacity
weight and tires that were on your vehicle at the time it was manu­
fac tured .
If you wish to improve comfort when operating the vehicle at
normal load (up to 3 occupants), you can adjust tire pressures to
those specified for normal vehicle load. Before operating the vehicle at maximum load, you must increase the tire pressures to those
specified for maximum vehicle load
~ & .
If your vehicle is equipped with a tire pressure monitoring system*,
bear in mind that the system can only monitor the tire pressures you have stored
. The system does not recognize the load condition of
your vehicle.
The effectiveness of the tire pressure monitoring system will be
impaired if you store normal load pressures but then operate the
vehicle at its maximum
load~& .
See the illustration~ page 297, fig . 217 for the location of the label
either on driver's side 8-pillar or inside the fuel filler flap (color of
the actual label and exact location on the vehicle will vary slightly).
Note that the following table is accurate at the time of going to
press and is subject to change . In the event of discrepancies, the tire
pressure label (e ither on driver's side 8 -pillar or inside the fuel filler
flap) always takes precedence.
The table below lists the recommended cold tire inflation pressures
for the Audi model covered by your Owner's Literature at the
vehicle's capacity weight and the tire si zes installed on the respec­
tive models as original equipment, or as a factory option.
Engine Tire size designation Tire pressure front Tire pressure rear
(displace- normal load normal load
ment in condition (up to full load
condition (up full load
liter) condition
condition
3 occupants) to 3 occupants)
PSI kPA PSI kPA PSI kPA PSI kPA
4-cylinder 215/55 R16 93H All Season 35 240
36 250 35 240
36 250
2.0
235/45 R17 94H All Season 33 230 35 240 33 230 35 240
235/45 R17 94V High Performance 30 210
32 220 30 210
32 220
235/40 R18 95V XL High Performance 35 240 39 270 35 240 39 270
6-cylinder 215/55 R16 93H All Season 36 250 36 250 35 240 36 250
3.2
235/45 R17 94H All Season 35 240
35 240
33 230 35 240
235/45 R17 94V High Performance 30
210 32 220 30 210 32 220
235/40 R18 95V XL High Performance 38 260 42 290 38 260 42 290
XL = reinforced or extra load tire. It may also appear as xi, EXTRA LOAID, or RF on the tire sidewall.

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W up to 168 mph (270 km/h)3
)
Y up to 186 mph (298 km/h)3
l
Your vehicle is normally factory equipped tires, which possess
excellent driving characteristics and give your Audi optimum
driving comfort. An electronic speed
limiter => page 28will normally
prevent your vehicle from going faster than the tire speed rating
=> & .
U .S. DOT Tire Identification Number (TIN) and tire
manufacture date
This is the tire's "serial number". It begins with the letters "DOT"
and indicates that the tire meets all federal standards. The next two
numbers or letters indicate the plant where it was manufactured,
and the last four numbers represent the week and year of manufac­
ture . For example, the numbers 2205 mean that the tire was
produced in the 22th week of 2005. The other numbers are
marketing codes that may or may not be used by the tire manufac­
turer. This information is used to contact consumers if a tire defect
requires a recall.
Tire ply composition and materials used
The number of plies indicates the number of layers of rubber-coated
fabric in the tire. In general, the greater the number of plies, the
more weight a tire can support. Tire manufacturers also must indi­
cate the materials in the tire, which include steel, nylon, polyester,
and others.
Maximum Load Rating
This number indicates the maximum load in kilograms and pounds
that can be carried by the tire.
Tire quality grading for treadwear, traction, and
temperature resistance
Tread wear, traction and temperature grades=> page 309 . Maximum Permissible Inflation Pressure
This number is
the greatest amount of air pressure that should ever
be put in the tire under normal driving conditions.
Replacing tires or rims on vehicles equipped with tire
pressure monitoring system*
The wheels on your vehicle are equipped with a sensor which
constantly monitors the air pressure inside the tire, and then trans­
mits this information to the tire pressure monitoring system*. If you
are going to replace the wheel rims on your vehicle, make sure the
new rims also have these sensors. The sensors must be compatible
with the tire pressure monitoring system* on your vehicle.
If you install rims, which do not have the sensors, or have sensors
which are not compatible, then the tire pressure monitoring
system * will not work properly. In this case, the tire pressure moni­
toring system* would not be able to monitor the tire pressure or
warn you if it is necessary .
• The battery inside of the tire pressure sensor has a limited
service life.
• Always drive with the valve stem caps securely mounted. We
recommend using factory installed valve stem caps . Ask your autho­
rized Audi dealer to replace lost valve stem caps.
The installation of replacement tires with steel cord body plies in
the tire sidewall may cause malfunction of the tire pressure moni­
toring system, and is not recommended (cord material information
in molded on the tire sidewall).
Always check your tire pressure monitoring system* indicator after
replacing one or more tires on your vehicle. If the tire pressure
monitoring system * indicator flashes, or is on, your system is not
working properly. Your replacement tire might be incompatible with
your tire pressure monitoring system*, or some component of the
tire pressure monitoring system* may be damaged.
....
Vehicle care

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Winter tires
Winter tires can impr ove vehicle handling on snow and
ice. At temperatures below 45 °F (7 °C) we recommend
changing to winter tires.
I n some heavy snow areas, local governments may require true
winter or "snow" tires, those with very deeply cut tread . These tires
should only be used in pairs and be instal led on a ll four wheels .
Make sure you purchase snow tires that are the same s ize and
construction type as the other tires on your vehicle .
If your vehic le is equipped with al l-wheel drive*, this will improve
traction during winter driving, even with the standard tires.
H owever, we strongly recommend that you a lways equ ip al l four
whee ls on your vehic le with correct ly fitted winter tires or all-season
t ires, when winter road conditions are expec ted. This also improves
t he vehic le's braking performance and reduces stopping distances.
Summer tires provide less grip on ice and snow.
W inter tires (snow t ires) must a lways be fi tted on a ll four wheels .
If your vehicle is equipped with a tire pressure monitoring system* ,
compatible tire pressu re monitoring sensors must be instal led on
a ll f our winter t ires for the system to function
properly=> page 307.
Ask your authorized Audi dealer or qualified workshop for permitted
winter tire size s. Use only rad ial winter tires.
Winter tires lose their effect iveness when the tread is worn down to
a depth of 4 mm (0.157 inch).
Only drive with w inter tires under winter conditions. Summer tires
handle better when there is no snow or ice on the roads and the
t emperature is above 45 °F (7 °C).
If you have a flat tire, see notes on spare
wheel=> page 305 .
Please a lways remember that winter tires may have a lower speed
rating than the tires original ly instal led on your vehicle at the ti me
it was manufactured . Please see
=> page 306 , "Speed rating (letter code)" for a listing of the speed rating letter codes and the
maximum speed at which t he tires can be d riven .
The speed rating letter
code(=> page 2961 i s on the side wa ll of the
tire => page 305.
& WARNING
Winter tire s have maximum speed limits that may be lower than
your vehi cle's ma ximum speed . Al wa ys know the ma ximum speed
before driving off . Never drive fa ster th an the speed permitted for
y our s pecifi c w inter tire s. Thi s will cau se damage to the tire s
lead ing to an a ccident and seriou s per sonal injury to you and your
p ass engers.
& WARNING
Driving fa ster th an the m aximum speed for whi ch the winte r tire s
on your vehi cle were de signed c an cause tir e failure in cluding a
blowout and sudden deflat ion , lo ss of contr ol, c rashe s and seriou s
per sonal injuries . Have worn or damaged tires repl aced immedi­
ately .
• Winter tires have ma ximum speed rating that may be lower
than your vehicle' s m axi mum speed .
• Never drive faster than the speed for which the winter or other
ti re s in sta lled on you r vehi cle are r ated .
& WARNING
Always adju st your driving to the ro ad and traff ic condit ions .
Never let the good acceleration of th e win ter tire s and all-wheel
dr ive tempt you into taking extra ri sks. Al ways rem ember :
• When braking, an all -wheel driv e vehicle handle s in th e same
w ay as a front dr ive veh icle .
• Drive ca refully and redu ce your speed on i cy and slippery r oads,
e ven w inter tires cannot h elp under bl ack ice condit ions .
...,