wheel AUDI TT COUPE 2017 Service Manual

Airbag syste m
Make sure that the PASSENGER AIR BAG
OFF
11;; li ght comes on and stays on all t he
t ime whenever the ignition is switched on.
A WARNING
-
- If the PA SSEN GER AIR BAG OFF 11;; light
does not go out when an adult is si tting on
the front passe nger seat a fter ta king the
steps described above, make sure the adult is p roperly seated and restrained at one of
the rear seating positions.
- Have the airbag system inspected by your
Audi dealer befo re t ransporting anyone on
the front passenger seat.
@ Tips
If the capacitive passenger detection system
determines that the front passenger seat is
empty, the frontal airbag on the passenge r
side w ill be tu rned off, and the
PASSENGER
AIR BAG OFF
11;; light will stay on.
Repair , care and disposal of the airbags
Parts of the a irbag system are installed at many
different places on your Audi. Installing, remov­ ing, servic ing or repa iring a part in an area of the
ve hicle can damage a part of an airbag system
and prevent that system from working properly
i n a collision .
There are some important things you have to
know to make sure that the effectiveness of the
system w ill not be impaired and that discarded
components do not cause injury or pollute the
env ironment.
A WARNING
Improper care, serv icing and repai r proce­
dures can increase the r is k of personal injury
and death by preventing an airbag from de­
ploying when needed or dep loying an airbag
unexpectedly:
-
- Never cover, obstruct, or change the stee r­
ing wheel horn pad or airbag cover or the in­
strument pane l or modify them in any way.
212
- Never attach any objects s uch as c up ho lders
or telephone mountings to the surfaces cov­
ering the a irbag un its.
- For cleaning the horn pad or instrument
panel, use only a soft, dry cloth or one mois­
tened w ith plain water. Solvents or cleaners
could damage the airbag cover or change
the st iffness or strength of the material so
that the airbag canno t deploy and p rotect
properly.
- Never repair, adjust , or change any parts of
the airbag system.
- All work on the steering wheel, inst rument
panel, front seats or e lectr ica l system ( in­
cluding the installation of a udio eq uipment,
cellular telephones and C B radios, etc.)
m ust be perfo rmed by a qualified techn ician
who has the training and specia l equipment
necessary.
- For any work on the airbag system, we strong ly recommend that you see your au­
thorized A udi dealer or qualified workshop.
- Never modify the front b umper or parts of
the vehicle body.
- Always make sure that the side a irbag can
inflate w ithout interference:
- Never install seat covers or replacement
upholstery over the front seatbacks that
have not been specifically approved by
A udi.
- Never use additional seat c ushions that
cover the areas where the side airbags in­
flate.
- Damage to the orig inal seat cove rs or to
the seam in the area of the s ide airbag
module mus t alway s be repaired immedi­
ate ly by an autho riz ed Au di dealer.
- The a irbag system can deploy on ly once. Af­
ter an airbag h as been deployed, i t m ust be
repla ced with new replacement parts de­
signed and approved espec ia lly for your
Audi model version . Replacement of com­
plete airbag systems or airbag components
must be perfo rmed by qua lified workshops
only. Make su re that any airbag service ac­
tion is entered in your A udi Warranty
&
Ma intenance boo klet under AIRBAG RE-
PLAC EM EN T RECORD.
~

CD
CD
.... N
" N ,....,
0
0
Ill co
All of this takes place in the blink of an eye, so
fast that many people don't even realize that the airbags have deployed . The airbags also inflate
with a great deal of force and it is important for
occupant safety that nothing should be in their
way when they deploy .
Fully inflated airbags in comb ination with proper­
ly worn safety belts slow down and limit the oc­
cupant 's forward movement and help to reduce
the r isk of injury .
Important safety instructions on the knee
airbag system
Airbags are only supplemental restraints . Always
wear safety belts correctly and ride in a proper
seating position.
There is a lot that you and your passengers must
know and do to help the safety be lts and airbags
to provide s upplemental protection .
,& WARNING
An inflating knee airbag can cause ser ious in­
jury. Wearing safety bel ts incor rectly and im­
proper seating posit ions increase the r isk o f
serious personal injury and death whenever a
vehicle is being used.
- The knee airbag system cannot protect you
prope rly if you are seated too close to any of
the a irbag locat ions. When ad justing their
seat positions, it is important that both the
dr iver and the front passenger keep their
upper bod ies a nd knees at the following
min imum safe d istances:
- at least 10 in (25 cm) between the chest
and the steering wheel/instrument panel.
- at least 4 in (1 0 cm) between t he knees
and the lower part of the instrument pan ­
el.
- The risk of persona l injury inc reases if you
lean forward or to the side, or if the seat is
imp roper ly positioned and you are not wear­
ing your safety belt. The risk increases even
more should the a irbag deploy.
- Always make sure that the knee airbag can
inflate without interference. Objects be­
tween you and the airbag can increase the
Airb ag sys tem
risk of injury in an accident by interfering
with the way the airbag deploys or by being
pushed into you as the a irbag deploys.
- Never let anybody, especia lly children or
anima ls r ide in the footwell i n fron t of the
passenger seat.
If the airbag deploys, this
can result in serious or fatal in juries.
- Never carry objects of any kind in the foot­
well a rea in front o f the d river's o r pas ­
senger's seat . Bulky objects (shopping
bags, for example) can interfere with or
prevent proper dep loyment of the airbag.
Small objects can be thrown thro ugh t he
vehicle if the airbag deploys and injure you
o r your passengers .
- Make sure there are no cracks, deep scratch­
es o r othe r damage in the area of the inst ru­
ment panel where the knee airbags are lo­
cated .
- If c hildren are incorrectly seated, their risk
of injury inc reases in a coll is ion
~ page 221, Child safety.
Side airbags
Description of side airbags
The airbag system can provide supplemental
protection to properly restrained front seat occu ­
pants.
F ig. 166 Side a irbag locat io n in the drive r's sea t
The side airbags are located in the s ides of the
front seat backrests~
fig. 166 fac ing the doors .
T hey are iden tified by the word "AIRBAG".
The side airbags installed for the front seating
pos itions have been des igned and certified to
help reduce the risk of in ju ry that can be caused
by a irbags when they inflate, pa rticul arly when .,.
215

co
co
.... N
" N .... 0
0
Vl c:o
rear seating position and have the airbag
system inspected by your authorized Audi
dealer.
- Always buckle the child seat firmly in
place even if a child is not sitting in it. A
loose child seat can fly around during a
sudden stop or in a collision.
- Always read and heed all WARNINGS
whenever using a child restraint in a vehi­
cle
c!;> page 189, Safety belts, c!;> page 197,
Airbag system
and c!;> page 221, Impor­
tant information.
{D) Tips
Always replace child restraints that were in­
stalled in a vehicle dur ing a crash. Damage to
a child restraint that is not visible could cause
it to fail in another collision situation.
Advanced front airbag system and children
Your vehicle is equipped with a front "Advanced
Ai rbag System" in compliance with United States
F edera l Motor Vehicle Safety Standard ( FMVSS)
208 as applicable at the time your vehicle was manufactured.
The Advanced Airbag system in your vehi cle has
been certified to meet the "low-risk" require­
ments for 3- and 6-year old children on the pas­
senger side and small adults on the driver side.
The low risk deployment criteria are intended to
reduce the risk of injury through interaction with
the airbag that can occur, for example, by being
too close to the steering wheel and instrument
panel when the airbag inflates. In addition, the
system has been certified to comply with the
"s uppress io n " req uiremen ts of the Safety Stand­
ard, to turn of f the front airbag for infants up to
12 months who are restrained on the front pas­
senger seat in chi ld restraints that are listed in
the Standard.
E ven though your vehicle is equipped with an Ad­
vanced Ai rbag system, all children, especially
those 12 years and younger, should always r ide
in the back seat properly restrained for their age
and size. The airbag on the passenger side makes
the front seat a potentially dangerous place for a
Child safety
child to ride. The front seat is not the safest place
for a chi ld in a forward-facing chi ld safety seat . It
can be a very dangerous place for an infant or a
larger ch ild in a rearward-facing seat.
T he vehicle's Advanced A irbag System has a ca­
pacitive passenger detection system in the front
passenger seat cushion that can detect the pres­
ence of a baby or a ch ild in a child restraint sys­
tem on this seat.
The capacitive passenger detection system regis­
ters the changes that result in an electrical field
when a child, a child restraint, and a baby b lanket
are on the front passenger seat. The change in
the measured capacitance due to the presence of
a child, a ch ild restraint, and a baby blanket on
the front passenger seat is related to the child
restraint system resting on the seat . Th e meas­
ur ed capacitance of a child restraint system var­
ies depending on the type of system and specific
make and mode l.
T he elect rical capacitance of the various types,
makes, and models of child restra in ts specified
by the U.S .National Highway Traff ic Safety Ad­
ministration (NHTSA) in the relevant safety
standard are stored in the Advanced Airbag Sys­
tem control unit together with the capacitances
typ ica l of infants and a 1-year old child. When a
child restraint is used on the front passenger
seat w ith a typical 1 year -old infant, the Ad­
vanced Airbag System compares the capacitance measured by the capacitive passenge r detection
system with the data stored in the electronic con­
trol unit.
Child restraints and Advanced front airbag
system
Regardless of the ch ild restraint that you use,
make sure that it has been certified to meet Unit­
ed States Federal Motor Vehicle Safety Standards
and has been certified by its manufacturer for
use with an a irbag. Always be sure that the child
r estra int is properly installed at one of the rear
seating positions.
If in except ional circumstances
you must use it on the front passenger seat, care­
f ully read all of the information on child safety
and Advanced Airbags and heed all of the .,.
223

"'
"' ... N
" N ... 0 0
"' CX)
Wheels
Wheels and Tires
General information
.,.Check your tires regularly for
damage (punctures, cuts, cracks
and bulges). Remove foreign ob­
jects from the tire tread.
.,. If driving over curbs or similar
obstacles, drive slowly and ap­
proach the curb at an angle.
.,.Have faulty tires or rims re­
placed immediately.
"'Protect your tires from oil,
grease and fuel.
.,.M ark tires before removing
them so that the same running
direction can be maintained if
they are reinstalled.
"'Lay tires flat when storing and
store them in a cool, dry location
with as little exposure to light as
possible.
(D Note
-Please note that summer and
winter tires are designed for
the conditions that are typical in those seasons. Audi recom­
mends using winter tires dur­
ing the winter months. Low
temperatures significantly de­ crease the elasticity of summ­
er tires, which affects traction
Wheels
and braking ability. If summer
tires are used in very cold
temperatures, cracks can form
on the tread bars, resulting in
permanent tire damage that
can cause loud driving noise
and unbalanced tires.
-Burnished, polished or
chromed rims must not be
used in winter driving condi­
tions. The surface of the rims
does not have sufficient corro­
sion protection for this and
could be permanently dam­ aged by road salt or similar
substances.
Tire designations
Fig. 196 T ir e designation on the side­
wall
255

Wheels
(D Tires for passenger vehicles
(if applicable)
P indicates a tire for a passenger
vehicle. T indicates a tire desig­
nated for temporary use.
@ Nominal width
Nominal width of the tire be­
tween the sidewalls in millime­
ters. In general: the larger the
number, the wider the tire.
@ Aspect ratio
Height/width ratio expressed as a
percentage.
@ Tire construction
R indicates a radial tire.
® Rim diameter
Size of the rim diameter in inches.
@ Load index and speed rating
The load index indicates the tire's
load-carrying capacity.
The speed rating indicates the maximum permitted speed
¢ & in
Winter tires on page 2
70.
"EXTRA LOAD", "xl" or "RF" indi­
cates that the tire is reinforced or
is an Extra Load tire.
Speed rat- Maximum permitted speed
ing
p
up to 93 mph (150 km/h)
Q up to 99 mph (160 km/h)
256
Speed rat- Maximum permitted speed
Ing
R
up t o 106 mph (170 km/h)
s up to 110 mph (180 km/h)
T up to 1 18 mph (190 km/h)
u up to 124 mph (200 km/h)
H up to 130 mph (210 km/h)
V up to 149 mph (240 km/h)al
z above 149 mph (240 km/h)al
w up to 168 mph (270 km/h)al
y up to 186 mph (300 km/h)al
a) For tires above 149 mph (240 km/h),
tire manufacturers sometimes use the
code "ZR".
(j) US DOT number (TIN) and
manufacture date
The manufacture date is listed on
the tire sidewall (it may only ap­
pear on the inner side of the tire):
DOT ... 2216 ...
means, for example, that the tire
was produced in the 22nd week of
the year 2016.
@ Audi Original equipment
tires
Audi Original equipment tires
with the designation "AO" have
been specially matched to your
Audi. When used correctly, these
tires meet the highest standards
for safety and handling. An au­
thorized Audi dealer or author­
ized Audi Service Facility will be

a, a, ... N
" N ... 0
0
V'> a:,
able to provide you with more in­
formation .
® Mud and snow capability
"M/5" or "M+S" indicates the tire
has properties making it suitable
to drive in mud or snow .
& indi­
cates a winter tire .
@Composition of the tire cord
and materials
The number of plies indicates the
number of rubberized fabric lay­
ers in the tire. In general: the
more layers, the more weight a
tire can carry . Tire manufacturers
must also specify the materials
used in the tire. These inc lude
steel, nylon, polyester and other
materials.
@ Maximum permitted load
This number indicates the max i­
mum load in kilograms and
pounds that the tire can carry.
@ Uniform tire quality grade
standards for treadwear,
traction and temperature resistance
Tread wear, traction and temper ­
ature ranges
¢ page 271.
@ Running direction
@ Maximum permitted
inflation pressure
Wheels
This numbe r ind icates the maxi­
mum pressure to which a t ire can
be in flated unde r normal operat­
ing conditions.
Glossary of tire and loading
terminology
Accessory weight
means the comb ined we ight (in
excess of those standard items
which may be replaced) of auto­
matic transmission, power steer­
ing , power brakes, power win­
dows, power seats, radio, and heater, to the extent that these
items are available as facto ry- in­
s t alled equipment (whether in ­
stalled or not) .
Aspect ratio
means the ratio of the height to
the w idth of the tire in percen t.
Numbers of 55 or lower indicate a
lo w sidewall for improved stee r­
ing response and better overa ll
handling on dry pavement.
Bead
means the part of the tire that is
made of steel wires , wrapped or .,.
257

Wheels
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 manufac­
turer for a tire of a designated
size that has not been driven for more than a couple of miles (kilo­
meters) at low speeds in the
three hour per iod before the tire
pressure is measured or adjusted .
Curb weight
means the weight of a motor ve­
hicle with standard equipment in­
c lud ing the maximum capacity of
fuel, oil, and coolant, air condi­
tioning and additional weight of
optiona l equipment .
Extra load tire
means a tire designed to operate
at highe r loads and at h igher in­
flation p ressures than the corre ­
sponding standard t ire. E xtra load
tires may be identified as "XL",
2 58
"xl" "EXTRA LOAD" or "RF" on , ,
the sidewall.
Gross Axle Weight Rating
("GAWR")
means the load-carrying capacity
of a s ingle axle system, measured
at the tire-ground interfaces.
Gross Vehicle Weight Rating ("GVWR")
means the max imum total loaded
weight of the vehicle.
Groove
means the space between two ad ­
jacent tread ribs.
Load rating (code)
means the maximum load tha t a
tire is rated to carry for a given in­
flation pressure . You may not find
this informat ion on all tires be­
ca use it is not requi red by law .
Maximum load rating
means the load rating for a tire at
the maximum permiss ible infla­
tion p ressure for that tire.
Maximum loaded vehicle
weight
means the sum of:
(a) Curb weight
(b) Accessory weight
...

(c) Vehicle capacity weight, and
(d) Production options weight
Maximum (permissible)
inflation pressure
means the maximum cold infla­
tion pressure to which a t ire may
be inflated. Also called "maxi­
mum inflation pressure."
Normal occupant weight
means 150 lbs (68 kg) times the
number of occupants seated in
the vehicle up to the tota l seating
capacity of your vehicle.
Occupant distribution
means distribution of occupants
in a vehicle.
Outer diameter
means the overall diameter of an
inflated new tire .
Overall width
means the linear dis tance be­
tween the exteriors of the side­
walls of an inflated tire, including
elevations due to labeling, deco ­
rations, or protective bands or
ribs.
Ply
~ means a layer of rubber-coated ...
~ parallel cords . ... 0
0
V'> a:,
Wheels
Production options weight
means the combined weight of
those installed regular production
options weighing over 5 lbs (2.3 kg) in excess of those standard
items wh ich they replace, not pre­
viously considered in curb weight
or accessory weight, including
heavy duty brakes, ride levelers,
roof rack , heavy d uty ba tte ry , and
special trim .
Radial ply tire
means a pneumatic tire in which
the ply cords that extend to the
beads ar e laid at substantia lly
90
degrees to the centerline of the
tread.
Recommended inflation
pressure
see c:::> page 258, Cold tire infla­
tion pressure .
Reinforced tire
means a tire designed to operate
at higher loads and at higher in ­
fl at ion pressures than the corre­
sponding standard tire. Rein­
forced tires may be iden tified as
"X L" "x l" "EXTRA L OA D" or "RF" I 1 I
on the sidewall. ..,
259

Wheels
Rim
means a metal support for a tire
or a tire and tube assembly upon
which the t ire beads are seated .
Rim diameter
means nominal diameter of the
bead seat . If you change your
wh eel size, you will have to p ur­
chase new tires to match the new
rim d iameter .
Rim size designation
means rim diameter and w idth.
Rim width
means nomina l distance between
r im flanges .
Sidewall
means that portion of a t ire be­
twee n the tread and bead .
Speed rating (letter code)
means the speed at which a t ire is
designed to be driven for extend­
ed periods of ti me. The ratings
range from 93 mph (150 km/h)
to 186 mph (298 km/h)
¢ table
on page 256 .
You may not find
this information on all tires be­
cause it is not required by law.
The speed rating letter code,
wh ere applicable, is molded on
the tire sidewall and ind icates the
260
maximum permissible road
speeds
¢ A in Winter tires on
page 270 .
Tire pressure monitoring
system *
means a system that detects
when one or mo re of a vehicle's
tires a re underinflated and illumi ­
nates a low tire pressure war ning
telltale .
Tread
means that portion of a tire that
comes into contact wi th the road.
Tread separation
means pulling away of the tread
from the tire carcass .
Treadwear indicators (TWI)
means the project ions wi thin the
pr inc ipal grooves designed to g ive
a visua l indication of the degrees
of wear of the tread . See
¢ page 264, Treadwear indicator
for mo re information on meas ur­
ing tire wear.
Uniform Tire Quality Grading
i s a tire informa tion system devel ­
oped by the Unite d States Nation ­
a l Highway Traffic Safety Admin­
istration (NHTSA) that is designed
to help buyers make re lative
..

a, a, .... N
" N .... 0
0
V'> a:,
comparisons among tires. The
UTQG is not a safety rating and
not a guarantee that a tire will
last for a prescr ibed number of
miles (kilometers) or perform in a
certain way . It simply gives tire
buyers additional information to
combine with other considera ­
tions, such as price, brand loyalty and dealer recommendations. Un­
der UTQG, tires are graded by the
tire manu facturers in three areas:
treadwear, traction, and tempera ­
ture res istance. The UTQG infor­
mation on the tires, molded into
the sidewalls.
U.S. DOT Tire Identification
Number (TIN)
T his is the tire's "seria l number" .
It beg ins with the letters "DO T"
and indicates that the tire meets
all federal s tandards. The next
two numbers o r letters indicate
the plant where it was manufac­
tured , and the last four numbers
represent the week and year of
manufactu re . For example,
DOT ... 2216 ...
means that the tire was produced
in the 22nd week of 2016 . The
other numbers are marketing co­ des that may or may not be used
Wheels
by the tire man ufact urer. This in­
formation is used to contact con­
sumers if a tire defect requires a
recall.
Vehicle capacity weight
means the rated cargo and lug­
gage load plus 150 lbs (68 kg)
times the vehic le's designated
seating capacity.
Vehicle maximum load on the
tire
means that load on an individual
tire that is deter mined by dist rib­
uting to each ax le its share of the
maximum loaded vehicle weight
an d div id ing
by two.
Vehicle normal load on the tire
means that load on an individual
tire that is determined by distrib­ uting to each ax le its share of the
curb weight, accessory weight,
and normal occupant weight (dis­
trib uted in acco rdance with
q ta­
ble on page 26 7) and divid ing by
two. .,.
261