wheel AUDI A3 CABRIOLET 2015 Workshop Manual

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different weight distribution. Safety, perform­
ance and economy wi ll greatly depend on how
carefu lly you load your trailer and operate
your rig.
Before you actually tow your trailer, practice
turning, stopping and backing up in an area
away from traffic. Keep practicing until you
have become comp letely familiar with the way
your vehicle- trailer combination behaves and
responds .
Backing up is d ifficult and requires practice.
Backing up with a trai ler generally requires
stee ring action opposite to that when backing
up your vehicle without a trailer .
Maintain a greater distance between your ve­
hicle and the one in front of you. You will need
more room to stop. To compensate for the
trailer, you will need a larger than normal
turn ing radius.
When passing, remember that you cannot ac­
celerate as fast as you normally would be­
cause of the added load. Make sure you have
enough room to pass . After passing, allow
p lenty of room for your tra iler before chang­
ing lanes again.
Avoid jerky starts, sharp turns or rapid lane
changes.
(D Tips
- Do not tow a tra iler during the break-in
period of your vehicle.
- If you tow a trailer, your Audi may re­
quire more frequent maintenance due to
the extra load
¢ page 282 .
Parking on a slope
Do not park on a slope with a trailer. If i t can­
not be avoided, do so only after doing the fol ­
lowing:
When parking:
.. Apply the foot brake.
.. Have someone place chocks under both the
vehicle and the trailer wheels.
Trailer towing 203
.. With chocks in place, slowly release the
brakes until the wheel chocks absorb the
load .
.. Turn the wheels towards the curb.
.. Apply the parking brake.
.. Select the P selector lever posit ion.
When re starting after parking:
.. App ly the foot brake.
.. Start the engine.
.. Select the
0/5 selector lever position.
.. Release the parking brake and slowly pull
out and away from the wheel chocks .
.. Stop and have someone retr ieve the wheel
chocks.
(D Tips
If you move the selector lever of the auto­
matic transmission to
P before applying
the parking brake and before blocking the
whee ls, you may have to use more force
lat er to move the lever out of the
P posi­
tion.
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Care and cleanin g 205
& WARNING
- Only wash the vehicle when the ignition
is off and follow the instructions from
the car wash operato r to reduce the risk
of accidents.
- To reduce the risk of cuts, protect your­
self from sharp metal components when
wash ing the underbody or the inside of
the whee l housings.
- After washing the vehicle, the braking ef­
fect may be delayed due to mo isture on
the brake rotors or ice in the winter . The
brakes must be dried first with a few
careful brake applicat io ns.
{[) Note
- If you wash th e vehicle in an automatic
ca r wash, yo u m ust fold the exterior m ir­
ro rs in to reduce the r isk of damage to
the mirrors . Power foldi ng exterior m ir­
r o rs* must o nly be folded in and out us­
i ng the power folding function.
- To prevent pa int damage, do not wash
th e veh icle in direc t sun ligh t. -
To reduce the r is k of damage, do no t
wash the powe r top with a pressure
washer.
- To reduce the r is k of damage to the sur­
face, do not use i nsect removing spong­
es, kitchen sponges or similar items.
- Matte finish painted vehicle compo­
nents:
- To reduce the risk of damage to the
surfac e, do not use polishi ng agents or
ha rd wax.
- Neve r use prot ective wax. It can de­
stroy the matte fin is h effect.
- Do not place any stickers o r magnet ic
signs on vehicle parts painted w it h
ma tte fi nish pa in t. The pa int cou ld be
da maged whe n the stickers o r m ag nets
ar e removed.
@ For the sake of the environment
Only wash t he ve hicl e in facili ties spe cially
d es igned for th at p urpose . Th is will re duce
the r is k of d irty wate r contam ina ted with
oil from entering t he sewer system.
Cleaning and care information
When clea ning and caring for individua l vehi­
cle components, refe r to the fo llow ing tab les .
The informa tion contained there is s imp ly rec­
ommendations. Fo r quest ions or for compo -n
ents that are not listed , refer to an author­
i z ed Audi dea ler. Also follow the info rma tion
fo und in ~ &, .
Exterior cleaning
Component Situation Solution
Wind shield wip-
Deposits ¢ page 54, Cleaning windshield wiper blades
er bl ade s
Headlights /
Deposits Soft sponge with a m ild soap solution3>
Tail lights
Sensors /
Deposits Sensors: soft cloth w ith a so lvent-free cleaning product
camera lenses Camera lenses: soft cloth with an alcohol-free cleaning
so lution
Snow/ ice Hand brush/so
lve nt-free de -icing spray
Wheels Road sa lt Water
Brake dust Acid
-free special cleaning so lu tion
E x haust tail Road sa lt Water, cleaning solut ion suitable for stainless steel, if
pipes necessary •
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Care and cleanin g 207
Component Situ ation Solution
D ispl ays
Deposits Soft clotlh with LCD cleaner
Controls Deposits Soft brush, then a soft cloth with a mild soap solutiona>
Sa fet y bel ts Deposits Mild soap solution a>, allow to dry before letting them
retract
Te xtil es, Deposits adher ing to Vacuum cleaner
a rtificial l eather, the surface
Alc ant ara Water-based depos- Absorbernt cloth and mild soap solutional
its such as coffee,
tea, blood, etc.
Oil-based deposits Apply a mild soap solution al, blot away the disso lved oil
such as oil, make- or dye, treat afterward with water, if necessary
up, etc.
Special depos its Spec
ial stain remover, b lot with absorbent material,
such as ink, nail po l- t reat afterward with mild soap solution, if necessary a)
ish, latex paint, shoe
polish, etc.
Natur al le ather Fresh stains Wool cloth with a m
ild soap solutional
Water-based depos- Fresh stains: absorbent cloth
its such as coffee, Dried stains: stain remover suitable for leather
tea, blood, etc.
Oi l-based deposits Fresh stains: absorbent cloth and stain remover suitable
such as oil, make- for leather
up, etc. dried stains: Oil cleaning spray
Special deposits Spot remover suitable for leather
such as ink, nail po l-
ish, latex paint, shoe
polish, etc.
Care Regularly apply condit ioning cream that protects from
l ight and penetrates into the mater ial. Use specially-
colored conditioning cream, if necessary .
Car bon part s Deposits clean the same way as plastic parts
al Mild soap solut ion : max imum two tablespoons neutral soap in a liter of water
A WARNING
The windshield may not be treated with
water-repelling windsh ie ld coating agents.
Unfavorab le conditions such as wetness,
da rkness, or low sun can result in in­
creased glare. W iper blade chatter is a lso
possible.
- Headlight s/tail light s
-
-Never clean headlights or tail lights
with a dry cloth or sponge.
- Do not use any cleaning product that
contains alcohol, because they could
cause cracks to form.
-Wheels
- Neve r use any pa int polish or other
abrasive mater ials.
- Damage to the protective layer on the
rims such as stone chips or scratches
must be repa ired immediately .
-Se nsor s/camera l ense s
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228 Tires an d whee ls
Tires and wheels
Tires
General notes
Tires may be the least appreci­
ated and most abused parts of
a motor vehicle.
Ti res may be the least appreci­
ated and most abused parts of
a motor vehicle. Tires are, how­
ever, one of the most important
parts of a vehicle, particularly
considering the comparatively
small patch of r ubber on each
tire that assures that all-impor­
tant contact between you, your
vehicle and the road.
Maintaining the co rrect tire
p ressure, making sure that your
vehicle and its tires do not have
to carry more we ight than they
can safe ly handle, avoiding
damage from road hazards and
regularly inspecting tires for
damage including cuts, s lashes
irregular wear and overall con ­
d ition are the most important
things that you can do to help
avoid sudden tire failure inc lud­
ing tread separation and blow­
outs.
Avoiding damage
If you have to drive over a curb
or similar obstacle, drive very
slowly and as close as possible
at a right angle to the curb.
Always keep chemicals includ­
ing grease, oil, gasoline and
brake fluid off the tires.
Inspect the tires regularly for
damage (cuts, cracks or blis­
ters, etc.). Remove any foreign
bodies embedded in the treads.
Storing tires
Mark tires when you remove
them to indicate the direction
of rotation. This ensures you to be able to mount them correct ­
ly when you reinstall them.
When removed, the wheels or
tires should be stored in a cool,
dry and preferably dark p lace.
Store tires in a vertical position if they are not mounted on
rims, in a horizontal position if
they are mounted on rims.
New tires
New tires have to be broken in
¢ &.
The tread depth of new tires
may vary, according to the type .,.

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and make of tire and the tread
pattern.
Hidden damage
Damage to tires and rims is of ­
ten not readily visible. If you
notice unusual vibration or the
vehicle pulls to one side, this may indicate that one of the
tires has been damaged . The
tires must be checked immedi­ ately by an authorized Audi
dealer or qualified workshop.
Unidirectional tires
A unidirectional tire can be identified by arrows on the
sidewall, that point in the direc­
tion the tire is designed to ro­
tate. You must follow the speci­
fied direction of rotation. This is necessary so that these tires
can develop their optimum
characteristics regarding grip,
road noise, wear and hydro­
planing resistance. For more in­
formation
¢ page 268.
A WARNING
-
New tires or tires that are
old, worn or damaged cannot
provide maximum control
and braking ability.
Tires and wheels 229
-New tires tend to be slip­
pery and must also be bro­
ken-in. To reduce the risk of
losing control, a collision
and serious personal inju­
ries, drive with special care
for the first 350 miles (560 km).
-Driving with worn or dam­ aged tires can lead to loss of
control , sudden tire failure,
including a blowout and
sudden deflation, crashes and serious personal inju­
ries. Have worn or damaged
tires replaced immediately.
-Tires age even if they are
not being used and can fail
suddenly, especially at high
speeds. Tires that are more
than 6 years old can only be
used in an emergency and
then with special care and at low speed.
-Never mount used tires on your vehicle if you are not
sure of their "previous histo­
ry." Old used tires may have
been damaged even though
the damage cannot be seen
that can lead to sudden tire
failure and loss of vehicle
control.
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230 Tires and wheels
-If you notice unusual vibra­
tion or if the vehicle pulls to
one side when driving, al­
ways stop as soon as it is
safe to do so and check the
wheels and tires for dam­
age.
0 Note
-Please note that summer and winter tires are de­
signed for the conditions
that are typical in those sea­
sons. Audi recommends us­
ing winter tires during the
winter months. Low tem­ peratures significantly de­
crease the elasticity of
summer tires, which affects
traction and braking ability. If summer tires are used
in
very cold temperatures, cracks can form on the tread
bars, resulting in perma­
nent tire damage that can
cause loud driving noise and
unbalanced tires. Audi is not
responsible for this type of
damage.
-Burnished, polished or chromed rims must not be used in winter road condi­
tions. The surface of the
rims does not have suffi­
cient corrosion protection
for this and could be perma­
nently damaged by road salt
or similar substances.
Glossary of tire and loading terminology
Accessory weight
means the combined weight (in
excess of those standard items
which may be replaced) of auto­ matic transmission, power
steering, power brakes, power
windows, power seats, radio, and heater, to the extent that
these items are available as fac­
tory-installed equipment (whether installed or not).
Aspect ratio
means the ratio of the height to
the width of the tire in percent.
Numbers of 55 or lower indi­
cate a low sidewall for im­
proved steering response and
better overall handling on dry
pavement.
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Bead
means the part of the tire that
is made of steel wires, wrapped
or reinforced by ply cords and
that is shaped to fit the rim.
Bead separation
means a breakdown of the bond
between components in the
bead.
Cord
means the strands forming the
plies in the tire .
Cold tire inflation pressure
means the tire pressure recom­
mended by the vehicle manu­
facturer for a tire of a designat­
ed size that has not been driven
for more than a couple of miles (kilometers) at low speeds in
the three hour period before
the tire pressure is measured or
adjusted.
Curb weight
means the weight of a motor
vehicle with standard equip­
ment including the maximum
capacity of fuel, oil, and cool­
ant, air conditioning and addi­
tional weight of optional equip­
ment.
Tires and wheels 231
Extra load tire
means a tire design to operate
at higher loads and at higher inflation pressures than the
corresponding standard tire. Extra load tires may be identi­
fied as "XL", "xl", "EXTRA
LOAD", or "RF" on the sidewall.
Gross Axle Weight Rating ("GAWR")
means the load-carrying capaci­
ty of a single axle system,
measured at the tire-ground in­
terfaces.
Gross Vehicle Weight Rating ("GVWR")
means the maximum total
loaded weight of the vehicle.
Groove
means the space between two
adjacent tread ribs.
Load rating (code)
means the maximum load that
a tire is rated to carry for a giv­
en inflation pressure. You may
not find this information on all
tires because it is not required by law.
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Recommended inflation
pressure
see¢ page 231J Cold tire infla­
tion pressure.
Reinforced tire
means a tire design to operate
at higher loads and at higher
inflation pressures than the
corresponding standard tire. Reinforced tires may be identi­
fied as "XL", "xl", "EXTRA
LOAD", or "RF" on the sidewall.
Rim
means a metal support for a
tire or a tire and tube assembly
upon which the tire beads are
seated.
Rim diameter
means nominal diameter of the
bead seat. If you change your
wheel size, you will have to pur­ chase new ti res to match the
new rim diameter.
Rim size designation
means rim diameter and width.
Rim width
means nominal distance be­
tween rim flanges.
Tires and wheels 233
Sidewall
means that portion of a tire be­
tween the tread and bead.
Speed rating (letter code)
means the speed at which a tire
is designed to be driven for ex­
tended periods of time. The rat­ ings range from 93 mph
(150 km/h) to 186 mph
(298 km/h) ¢
page 251. You
may not find this information
on all tires because it is not re­
quired by law.
The speed rating letter code,
where applicable, is molded on
the tire sidewall and indicates
the maximum permissible road speeds ¢
& in Winter tires on
page 255.
Tire pressure monitoring system
means a system that detects
when one or more of a vehicle's
tires are underinflated and illu ­
minates a low tire pressure
warning telltale.
Tread
means that portion of a tire
that comes into contact with
the road.
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Vehicle maximum load on the tire
means that load on an individu­
al tire that is determined by
distributing to each axle its
share of the maximum loaded
vehicle weight and dividing by two.
Vehicle normal load on the tire
means that load on an individu­
al tire that is determined by
Tires and wheels 235
distributing to each axle its
share of the curb weight, acces­
sory weight, and normal occu­ pant weight (distributed in ac­
cordance with table below
¢ page 235) and dividing by
two.
Occupant loading and distribution for vehicle normal load for
various designated seating capacities
Designated seating Vehicle normal load, Occupant distribu-
capacity, number of number of occupants tion in a normally
occupants loaded vehicle
4 3 2 in front, 1 in back
seat
Cold tire inflation pressure
Tire pressure affects the overall handling, performance and safety
of a vehicle.
Fig. 172 Ti re pressure label: located
on driver's s ide B -pillar
""" -,.._ u net:MHW>NS
-.....
--.,._
- KPA. a PSI
- KPA.
a PSI
-KPA. a PSI
Fig. 173 Tire pressure label
"'

236 Tires and wheels
Tire pressure generally refers to tant things you can do to help
the amount of air in a tire that avoid sudden tire failure. Un-
it needs it to do its job and derinflated tires are a major
safely carry the combined load cause of sudden tire failure.
of the entire vehicle and its con- Keeping tires at the right pres-
tents. Tire pressure is measured sure is also important for safe in kilopascals (kPa), the inter-and responsive vehicle han-
national measuring unit and in dling, traction, braking and
pounds per square inch (PSI). load carrying.
Tire pressures
Tire pressure is based in part on are particularly important
the vehicles design and load when the vehicle is being driv-
limit -the greatest amount of en at higher speeds, and then
weight that the vehicle can car-especially when heavily loaded
ry safely and the tire size. The even within the permissible
proper tire pressure is frequent-load-carrying capacities ap-
ly referred to as the "recom-proved for your vehicle.
mended cold tire inflation pres-
The recommended tire pres-
sure." Air in the tires expands
sures for your Audi depend on
when the tire heats up because the kind of tires on your vehicle
of internal friction when it flex-
and the number of passengers
es in use. The tire pressure is
and/or amount of luggage you
higher when the tire has will be transporting.
warmed up than when it is The tire pressure label is locat-
"cold." It is the inflation pres-
ed on the driver's side 8-pillar.
sure in a "cold " tire that counts .
Therefore, you should never let The tire pressure label lists the
recommended cold t ire infla-
air out of a warm tire to match
"cold tire inflation pressure" tion pressures for the vehicle at
its maximum capacity weight
recommendations. The tires
would then be underinflated and tires that were on your ve-
and could fail suddenly. hicle at the time it was manu-
factured .
...
Maintaining proper tire pres-
sure is one of the most impor-