2014 AUDI TT ROADSTER change wheel

122 Airbag sys te m
- If you must install a rearward facing
child safety seat on the front passenger
seat because of exceptional circumstan­ ces and the
PA SSEN GE R AIR BA G OFF
light does not appear and stay on have
the a irbag system inspected by your Audi
dealer.
- A tight tether or other strap on a rear­
ward-fac ing child restra int attached to
the front passenger seat can put too much pressure on the weight-sens ing
mat in the seat and register more weight
than is actually on the seat. The heavier
weight registered can make the system
work as though an adu lt were on the seat
and deploy the Advanced Airbag when it
must be suppressed caus ing serious or
even fatal injury to the child.
- If, in exceptional circumstances, you
must install a forward-facing child re­
straint on the front passenger seat, al­
ways move the seat into its rearmost po­ sit ion in the seat's fo re and aft adjust­
ment range, as far away from the airbag
as possib le . The backrest m ust be adjust­
ed to an upright position. Make sure that
the
PASSENGER AIR BAG OFF light
comes on and stays on all the t ime when­
ever the ignition is switched on.
A WARNING
- If the PASSENGER AIR BAG OFF light
does not go out when an adult is sitting
on the front passenger seat after taking
the steps described above, have the air­ bag system inspec ted by your Audi deal­
er before transporting anyone on the
front passenger seat.
(D Tips
If the weight-sensing mat in the front pas­
senger seat detects an empty seat, the
front airbag on the passenge r side will be
turned off, and
PASSENGER AIR BAG OFF
w ill stay on.
Repair, care and disposal of the airbags
Pa rts of the airbag system are i nstalled at
many diffe rent p laces o n your Aud i. Insta llin g,
removi ng, servicing or repa iring a part in an
area of the veh icle can damage a part of an
airbag system and prevent that system from
working properly in a coll is ion.
T he re a re some important t hings you have to
k now to make sure that the effectiveness o f
t h e system wi ll not be impaired and that dis­
carded components do not cause injury or pol ­
l ute the environment.
A WARNING
Improper care, serv ic ing and repair proce­
dures can increase the risk of personal in­
j u ry and death by prevent ing an a irbag
from deploying when needed or dep loying
an a irbag unexpec tedly:
- Never cover, obst ruct, or change the
steer ing whee l horn pad or ai rbag cover
or the in st rument panel or mod ify them
in any way .
- Never attach any obje cts s uch as c up
holders or telephone mountings to the
sur faces covering the a irbag un its.
- For cle aning the horn pad or instr ument
panel, use only a soft, dry clo th or one
moistened with pla in water. Solvents o r
cleaners could damage the airbag cover
or change the st iffness or strength of the
material so that the airbag cannot de­
p loy and protect properly.
- Never repair, adjust, or change any parts
of the a irbag system.
- All work on the steering wheel, instru­
ment panel, front seats or e lectr ica l sys­
tem (including the installation of audio
equ ipment, cellu lar telep hones and CB
radios, etc.) must be performed by a
qualified technic ian who has the training
and specia l equipment ne cessary.
- For any wo rk on the airbag system, we
strongly recommend that you see your
author ized Audi dealer or qualified work-
shop. ..,.

124 Airbag system
with the safety belt buckles so that the sen­
sors can send the correct information about
safety belt use to the electron ic control unit.
,&. WARNING
Changing the vehicle 's suspension includ­
ing use of unapproved tire-rim combina­
tions can change Advanced Airbag per­
formance and increase the risk of serious personal injury in a crash.
- Never install suspens ion components
that do not have the same performance
characteristics as the components origi­
nally insta lled on your vehicle.
- Never use ti re-rim combinat ions that
have not been approved by Audi.
,&. WARNING
-
Items stored between the safety belt
buckle and the center console can cause
the sensors in the buckle to send the
wrong information to the electronic con­
trol modu le and prevent the Advanced A ir ­
bag System from working properly.
- Always make sure that nothing can inter-
fere with the safety belt buckles and that
they are not obstructed.
Knee airbags
Description of knee airbags
The knee airbag system can provide supple­
mental protection to properly restrained
front seat occupants.
Fig. 116 Driver's airbag
The driver knee airbag is in the instrument
panel underneath the steering wheel
~ fig. 116, the airbag for the passenger is at
about the same height in the instrument pan­
el underneath the glove compartment .
T he knee airbag offe rs addi tional p rotec tion
to the driver 's and passenger's knees and up­
per and lower thigh areas and supplements
the protection by the safety belts.
If t he front a irbags dep loy, the k nee a irbags
also dep loy in frontal collisions when the de­
ployment threshold stored in the control unit
is met
~ page 118, More important things to
know about front airbags .
In addition to their normal sa fety function,
safety belts help keep the driver or front pas­
senger in position in a fronta l collision so that
the a irbags can provide supplemental protec­
t ion.
The airbag system is not a substitute for your
safety belt. Rather, it is part of the overa ll oc ­
cupant restraint system in your vehicle. A l­
ways remember that the airbag system can
only he lp to protect you if you are wearing
you r safety belt and wea ring it properly. This
is why you should a lways wear your safety
belt, not just because the law requi res you to
do so~
page 101, General notes.
The safety belt buckle for the driver and front
seat passenger have switches that tell the air­
bag control module if the safety bel t is being
u sed or not .
If the safety belt is be ing used,
t h e knee a irbag w ill deploy at a s light ly h igher
rate of dece leration than if the belt is not be ­
ing used. Therefore, in a particular co llision, it
is possib le that an airbag will not dep loy at a
seating position where the safety belt is being
used but will inflate at the position where the
safety belt is not being used .
Remember too, airbags will deploy on ly once
and only in certa in kinds of accidents - your
safety belts are always there to offer protec­
t ion in those accidents in which airbags are
not supposed to deploy o r whe n they have al­
ready dep loyed, for example when your vehi­
cl e s trikes or is st ru ck by ano ther after the
first collision . ..,.

142 Intelligent technology
Intelligent technology
Notice about data
recorded by vehicle
control modules
Your vehicle is not equipped with an Event Da­
ta Recorder (EDR), installed by some manu­
facturers fo r the express purpose of capturing
data for retrieval after an accident or crash
event . EDR's are sometimes ca lled "crash re­
corders".
Some state laws restrict the retr ieval or down­
loading of data stored by EDR's that were in­
stalled in a vehicle for the express purpose of
retrieving data after an accident or crash
event without the owner's consent.
A lthough your vehicle is not equipped with an
EDR, it is equipped with a number of electron­
ic control modules for various vehicle systems
such as, for examp le, eng ine function, em is­
sion control, as well as for the airbags and
safety belts.
These electronic contro l modules also record
vehicle-re lated data during normal vehicle op­
eration for diagnostic and repair purposes.
The recording capacity of the electronic con­
trol modules is limited to data (no sound is re­
corded) and only a small amount of data is ac­
tually recorded over a very limited pe riod of
time and stored when a system fault or other
condition is sensed by a control unit. Some of
the data then stored may relate to vehicle
speed, direction, braking as we ll as restraint
system use and performance in the event of a
crash or other condition. Stored data can only
be read and downloaded with special equip­
ment.
Electronic Stabilization
Control (ESC)
Description
ESC helps to improve road holding and vehicle
dynamics to help reduce the probability of
skidd ing and loss of vehicle control. It works
only when the engine is running. ESC detects certain difficult driving situat
ions, including
when the vehicle is beginning to spin (yaw)
out of control and helps you to get the veh icle
back under control by se lectively braking the
wheels, and/or reducing engine power and
providing steering assistance to help hold the
vehicle on the driver's intended course. The in­
dicator light
G) in the instrument cluster
blinks when ESC is taking action to help you
control the vehicle.
ESC has limitations.
It is important to remem­
ber that ESC cannot overcome the laws of
physics. It wi ll not always be able to help out
under all conditions you may come up against.
For example, ESC may not always be able to
help you master situations where there is a
sudden change in the coefficient of friction of
the road surface. When there is a section of
dry road that is suddenly covered with water,
slush or snow, ESC cannot perform the same
way it wou ld on the dry surface . If the vehicle
hydroplanes (rides on a cushion of water in­
stead of the road surface), ESC will not be
able to help you steer the vehicle because con­
tact with the pavement has been interrupted
and the vehicle cannot be braked or steered.
During fast cornering, particularly on winding
roads, ESC cannot always deal as effectively
with difficult driving situations as at lower
speeds.
Always adjust your speed and driving style to
road , traffic §&and weather conditions. ESC
cannot override the vehicle's physical limits,
increase the available traction, or keep a vehi­
cle on the road if road departure is a result of
driver inattention . Instead, ESC improves the
poss ibility of keeping the vehicle under con­
t rol and on the road dur ing extreme maneu­
vers by using the driver's steering inputs to
help keep the vehicle go ing in the intended di­
rection . If you are traveling at a speed that
causes you to run off the road before ESC can
provide any assistance, you may not experi­
ence the benefits of ESC.
ESC includes and/or works togethe r with the
anti- lock brake system (ABS), brake assist sys-
tem and anti-slip regu lation (ASR). ESC is .,..

switched on all the time. In certain situations
when you need less traction, you can switch
off ESC by pressing the button
lru. Be sure to
switch ESC on again when you no longer need
less traction.
Anti-lock braking system (ABS)
ABS prevents the wheels from locking up
when braking . The vehicle can still be steered
even during hard braking . Apply steady pres ­
sure to the brake pedal. Do not pump the ped­
al. A pulsing in the brake pedal indicates that
the system is helping you to brake the vehicle.
Brake assist system
The brake assist system can decrease braking
d istance. It increases braking power when the
driver presses the brake pedal quickly in emer­
gency si tuations. You must press and hold the
brake pedal until the situation is over .
Anti-slip regulation (ASR)
ASR reduces engine power when the drive
wheels begin to spin and adapts the force to
the road condit ions. This makes it easier to
start, accelerate and drive up hills.
Electronic differential lock (EDL)
The EDL brakes wheels that are spinning and
transfers the drive power to the other drive
wheel or whee ls if the vehicle is equipped with
all-wheel 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 brake on the braked wheel
from overheating. EDL w ill switch on again au­
tomatically when conditions have returned to
normal.
..&, WARNING
- ESC, ABS, ASR and EDL cannot overcome
th e laws of physics. This is especially im ­
portant on slippery or wet roads.
If the
systems begin acting to stabilize your ve­
hicle, you should immediately change
your speed to match the road and traffic
condit ions. Do not let the increased safe­
ty provided by these systems tempt you
Intelligent technology 143
to take risks. Doing so will increase the
risk of a lo ss of vehicle control, co llision
and serious personal injuries.
- Always adapt your speed to road, traffic
and weather conditions. The risk of los­
ing control of the vehicle increases when
driving too fast, especially through
curves and on slippery or wet roads, and
when driving too close to vehicles up
ahead. ESC, ABS, the brake assist sys­
tem, EDL and ASR cannot prevent colli­
sions.
- Always accelerate with special care on
even, smooth surfaces such as those that
are wet or covered with ice and snow.
The drive wheels can spin even with
these assistance systems that cannot al ­
ways he lp to reduce the risk of loss of ve­
hicle control.
@ Tips
- ABS and ASR only work correct ly when
all four whee ls are equipped with identi­
cal tires. D ifferent tire si zes can lead to a
reduction in engine power.
- You may hear noises when the systems
described are working.
- If the ind icator lightD] orE (USA
models)/ [iJ (Canada models) appears,
there may be a malfunction¢
page 18,
¢ page 18.
Switching on and off
ESC turns on au tomatically when you start
the engine.
Fig . 123 Ce nter conso le: ESC OFF butto n

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 given inflation pressure. You
may not find this information on all tires be­
cause it is no t req uired by law.
Maximum load rating
means the load rating for a t ire at the max i­
mum permissible inflation pressure 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 inflation pressure
to which a tire may be inflated. Also called "maximum inflation pressure."
Normal occupant weight
means 150 lbs. (68 kilograms) times the
number of occupants seated in the vehicle up
to the total seating capacity of your vehicle.
Occupant distribution
means distribution of occupants in a vehicle.
Outer diameter
means the overa ll diamete r of an inflated new
tire.
Overall width
means the linear distance between the exteri­
ors of the sidewalls of an inflated tire, includ ­
in g elevations due to labeling, decorations, or
protective bands or ribs.
Ply
means a layer of rubber-coated parallel cords.
Tires and wheels 183
Production options weight
means the combined weight of those installed
regular production options we ighing over 5
lbs. (2.3 kg) in excess of those standard items
which they replace, not previously considered
in curb weight or accessory weight, including
heavy duty brakes, ride levelers, heavy duty
battery, and special trim.
Radial ply tire
means a pneumatic tire in wh ich the ply cords
that extend to the beads are laid at substan­
tia lly 90 degrees to the center line of the
tread .
Recommended inflation pressure
see ¢ page 182, Cold tire inflation pressure.
Reinforced tire
means a t ire designed to operate at higher
loads and at higher inflat ion pressures than
the corresponding standard tire . Reinforced
tires my be identified as "XL", "xl", "E XTRA
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 nom inal d iameter of the bead seat. If
you change your wheel s ize, you will have to
purchase new tires to match the new rim di­
ameter.
Rim size designation
means r im diameter and width .
Rim width
means nominal distance between rim flanges .
Sidewall
means that portion of a tire between the
tread and bead. •
•

186 Tire s and wheel s
you have stored . The system does not
recognize the load condition of your vehicle.
The effectiveness of the tire pressu re monito r­
ing system w ill be impaired if yo u store nor­
mal load pressures but then operate the vehi ­
cle at its maximum load¢.&..
See the il lustration¢
fig. 138 for the location
of the label on dr iver's side 8-pillar (color of
the actua l labe l and exact location on the ve­
hicle wi ll vary slightly).
Note that the followi ng tab le is accurate a t
the time o f go ing to press and is subject to change. In the
event of discrepancies, the t ire
pressure label (on driver's side 8-pi llar) a lways
takes precedence .
T he table below lists the recommended cold
ti re inflation pressu res for the Audi mode l
covered by your Owner's Literature at the vehi­
cle's capacity weight and the t ire sizes instal­
l ed on the respective models as original
equipment, or as a factory option.
Model/ Tire designation
Tire pressure front Tire pressure rear
Engine full load full load
no rmal load
condition normal load
condition
condition (2 occupants condition
(2 occu-
( up to 2 oc-
plus lug- (up to 2 oc-
pants plus
cupants)
gage) cupants)
luggage)
PSI kPA PSI kPA PSI kPA PSI kPA
TT /TTS : 22 5/50 Rl 7 94H All Sea -
32 220 32 220 29 200 29 200 2.0 liter son
4-c ylin-225 /50 Rl 7 94W XL High
d er
Perf orm ance
32 220 32 220 29 200 29 200
2
45 /4 5 Rl 7 95 H All Sea-
32 220 32 220 29 200 29 200 son
245 /45 Rl7 95YX L High
32 220 32 220 29 200 29 200 Perf ormance
245 /40 R1 8 93H All S ea-
32 220 32 220 29 200 29 200 son
2 45 /40 Rl8 9 3Y XL High
32 220 33 230 29 200 30 210 Perform ance
25 5/35 Rl 9 96Y XL Hi gh
32 220 32 220 29 200 29 200 Perf or mance
X L= r ein for ce d or e xtra lo ad tire . It m ay also a ppear as xl, EX TRA LO AD, or RF on th e tire side-
w all.
The correct tire pressure for the spare wheel is
l ocated on a label on the driver's side 8-pillar.
Because technical changes may be made to
vehicle equ ipment dur ing the model year, al­
ways compare the tire size designation on the
tire pressure labe l on your vehicle w ith the
tires on your vehicle. Ma ke sure that the tire
size information on the vehicle label is the same
as the size of the tires on the veh icle.
T his is espec ially important if the veh icle be­
longs to someone e lse or you boug ht the vehi­
cle w ith different rims/tires or you bought the
vehicle as a previously owned veh icle.
Remember, your safety and that of your pas-
sengers also depends on making sure that
II>-

-If the tire pressure is too low or too high,
the tires w ill wear prematurely and the
vehicle will not handle we ll.
- If the tire is not flat and you do not have
to change a wheel immed iate ly, drive at
reduced speed to the nearest service sta­
t ion to check the tire pressure and add
air as required.
([) Note
Driving without va lve stem caps ca n cause
damage to the tire va lves . To prevent this ,
always make su re that facto ry installed
valve stem caps on all wheels a re secure ly
mounted on the va lve.
@ For the sake of the environment
Underinflated tires will a lso increase the
fue l consumption .
Tires and vehicle load limits
There are limits to t he amount of load or
weight that any veh icle and any t ire can carry.
A veh icle that is overloaded w ill no t handle
well and is more diff icult to stop. Overloading
can not on ly lead to loss of veh icle contro l,
but can a lso damage important parts of the
ve hicle and can lead to sudden tire failure, in­
cluding a blowout and sudden deflation that
can cause the veh icle to crash .
Your safety and that of yo ur passengers a lso
depends on making sure that load limits are
no t exceeded. Vehicle load includes everybody
and everyth ing in and on the vehicle . These
load limits a re techn ica lly refer red to as the
ve hicle's
Gro ss Vehicl e W eight Rat ing
(" GVWR ").
T he "GVWR " includes the we ight of the basic
vehicle, all factory installed accesso ries , a full
tank of fue l, oil, coo lant and other fluids pl us
maximum load. The maximum load includes
the number of passengers th at the ve hicl e is
i ntended to carry ("seating capacity") with an
assumed weight of 150 lbs (68 kg) for eac h
passenger at a designated seating position
Tire s an d wheel s 189
and the total weight of any luggage i n the ve­
hicle .
T he
Gro ss Ax le Weight Rating ( " G AWR ") is
the max imum load th at can be applied at each
of the vehicle's two axles .
T he Gross Vehicle Weight Rat ing and the
G ross Ax le Weig ht Ra ting are l iste d on the
s af ety comp liance s ticke r label lo cated on the
driver's side 8-pillar . Your Audi has 2 seating
positions. Each seating position has a safety
belt ~
page 101, Safety belts.
The fac t that there is an upper limit to yo ur
vehicle's G ross Vehicle Weight Rating means
that the total weight of whatever is being car­ ried in the vehicle is lim ited . The more passen ­
gers in the vehicle or passengers who are
heavier than the standard we ights assumed
mea n that less we ight can be carried as lug ­
gage .
The tire pressure label on your Audi also lists
the maximum combined weight of a ll of the
occupants and luggage or other cargo that
t h e ve hicle can ca rry . Fo r th e locat ion of the
label
~ page 185, fig . 138 .
_&. WARNING
Overloading a veh icle can cause loss of ve­
h icl e co ntro l, a crash or o ther accide nt, se­
rio us pe rsonal inj ury, and even dea th.
- Ca rrying more we igh t tha n your ve hicle
was des igned to carry wi ll prevent the
veh icle from handling properly an d in­
crease the risk of the loss of vehicle con­
trol.
- T he b rakes on a vehicle that has been
overloaded may not be able to stop the
veh icle w ith in a safe distance .
- Tires on a vehicle that has been over load­
ed can fail suddenly, incl uding a blowo ut
and sudden deflation, causing loss of
control and a crash.
•
•

200 Tires and wheels
remain continuo usly illuminated . This se­
quence will continue upon subsequent vehicle
start-ups as long as the ma lfunction ex ists.
When the malfunction indicator is illuminat­
ed, the system may not be able to detect or
signal low tire pressure as intended. TPMS
malfunctions may occur for a variety of rea­
sons, including the installation of replace­ ment or alternate tires or wheels on the vehi­
cle that prevent the TPMS from functioning properly . Always check the TPMS malfunction
tellta le after replacing one or more t ires or
wheels on your veh icle to ensure that the re­
placement or alternate tires and wheels allow
the TPMS to continue to function properly.
Tire pressure indicator appears
Applies to vehicles: with tire pressure monitoring system
The tire pressure indicator in the instrument
cluster informs you if the tire pressure is too
low or if there is a system malfunction.
F ig. 143 Display : underi nflat io n warn ing
Using the ABS sensors, the tire pressure moni­
toring sys tem compares the t ire tread circum­
ference and vibration characteristics of the in­
d iv idual tires . If the pressure decreases in one
or more tires, th is is indicated in the instru­
ment clus ter with a warning symbo l
ail and a
message<>
fig. 143. The dr iver message in the
display goes out after 5 seconds . The driver
message can be displayed again by pressing
the
! CHECK I button @¢ page 10, fig . 3 . If on ­
l y one tire is affected, the display will indicate
its pos ition.
The tire press ure monitoring m ust be reset in
the menu display each time the pressures are
ad justed (e.g. when switching between parti- al and fu
ll load pressure) or after changing or
replacing a tire on your vehicle<>
page 201.
The TPMS indicator only mon itors the t ire
pressure that you have previously stored . You
can find the recommended tire pressures for
your vehicle on the label on the driver's door
pillar
¢ page 185.
Tire tread circumference and vibration charac­
teristics can change and cause a tire pressure
warning if:
- the t ire pressure in one or more tires is too
low,
- the tire has structural damage,
- the tire pressure was changed, wheels rotat -
ed or replaced but the TPMS was not reset
¢ page 201.
Warning symbols
ail Loss of pressure in at least one tire¢& .
Check the tire or tires and replace or repa ir if
necessary . The indicator light
HE in the instru­
ment cluster also illuminates
<>page 13.
Check/correct the pressures of all four tires
and reset TPMS in the menu display .
ffim (T ire Pressure Monitoring System) Tire
pressure! System malfunction. Ifffim
ap­
pears after switching the ignition on or while
driv ing and the indicator lig ht
HE in the in­
strument cluster blinks for approx ima tely one
minute and then stays on, there is a system
malfunction .
At tempt to store the correct tire pressure
¢ page 201. Ifthe indicator light does not
turn
off or if it turns on shortly thereafter, im ­
med iate ly drive your vehicle to an author ized
Audi dealer or author ized repair facility to
have the malfunction corrected.
_&. WARNING
-
- If the tire pressure indicat or appears in
the instrument cluster display, one or
more of your tires is significant ly under­
inflated . Reduce your speed immediately
and avoid any hard steer ing or braking
maneuvers. Stop as soon as possible and
check the tires and their pressures.
IJJ,,