2017 AUDI TT ROADSTER wheel size

Intelligent Technology
Intelligent Technology
Electronic stabilization
control (ESC)
Description
Electronic Stabilization Control (ESC) supports
driver safety.
It reduces the risk of slipping and
improves driving stability. ESC detects critical sit­
uations such as the vehicle oversteering and un­
dersteering or the wheels are spinning. The vehi­
cle is stabilized by applying the brakes or reduc ­
ing engine torque. When ESC engages, the
G1 in­
dicator light blinks in the instrument cluster.
The following systems are integrated in the ESC:
Anti-lock braking system (ABS)
ABS prevents the wheels from locking when brak­
ing. The vehicle can still be steered even during
hard braking. Apply steady pressure to the brake
pedal. Do not pump the pedal. A pulsing in the
brake pedal indicates that the system is acting to
stabilize the vehicle .
Brake assist system
The brake assist system can decrease braking dis­
tance. It increases braking power when the driver
presses the brake pedal quickly in emergency sit­
uations . You must press and hold the brake pedal
until the dangerous situation is over .
Anti-slip regulation (ASR)
ASR reduces engine power when the drive wheels
begin spinning and adapts the force to the road
conditions. This makes it easier to start, acceler­
ate and drive up hills .
Electronic differential lock (EDL)
EDL applies the brakes to a wheel that starts
spinning and transfers the drive power to the
other driving wheels. This function is not availa­
ble at higher speeds.
In extreme cases, EDL automatically switches
off
to keep the brake on the braked wheel from over­ heating. The vehicle is still working correctly. EDL
will switch on again automatically when condi­
tions have returned to normal.
88 Steering
recommendation
The ESC helps to stabilize the vehicle by changing
the steering torque.
Selective wheel torque control
Selective wheel torque control is used when driv­
ing on curves. The front whee l on the inside of
the curve or both wheels on the inside of the
cu rve are braked selectively as needed. This al­
lows more precise driving in curves. The applica ­
ble system may not activate when driving in wet
or snowy conditions.
A WARNING
- The ESC and its integrated systems cannot
overcome the limits imposed by natural physical laws. This is especially important
on slippery or wet roads. If the systems be­
gin acting to stabilize your vehicle, you
should immediately alter your speed to
match the road and traffic conditions. Do
not let the increased safety provided tempt
you into taking risks. This could increase
your risk of a collision .
- Please note the risk of a collision increases
when driving fast, especially through curves
and on slippery or wet roads, and when driv­ ing too close to objects ahead. The ESC and
its integrated systems cannot always pre­
vent collisions -there is still a risk of acci­
dents!
- Press the accelerator pedal carefully when
accelerating on even, slippery surfaces such
as ice and snow. The drive wheels can spin
even when these control systems are instal­
led and this can affect driving stability and
increase the risk of a collision.
(j) Tips
-The ABS and ASR only function correctly
when all four wheels have a similar wear
condition. Different tire sizes can lead to a
reduction in engine power.
- You may hear noises when the systems de­
scribed are working.

Voice recognition system
Voice recognition system Operating
Applies to: vehicles with vo ice recognition system
You con operate many Infotainment functions
conveniently by speaking.
Req uirement: the ignition and the MMI must be
sw itched on, there m ust be no p hone call in p rog­
ress and the park ing system must not be active .
... Switching on : briefly press the~ but ton @
¢page 21, fig. 10 on the mu ltifunction stee r­
ing whee l an d say the desired command after
the
Beep .
... Switching off :
press and hold the l2!J button.
Or: say the command C ancel.
.., Pause :
say the command Pause . To resume,
press the
l2!I button .
... Corre cting : press the ~ button one t ime
@ ¢
page 20, fig. 8. Or: say the command Cor­
r ec tion .
Input assistance
The system gu ides you through the input with
visual and audio feedback .
-Visual input assistance : after switching on
vo ice recognit ion, a display with a se lection of
poss ible commands appea rs. The command
display can be sw itched on/off under
I M ENU !>
Setting s> left control bu tton > MMI setting s>
Speech dialog sy stem .
-Audio input as sistance :
to have the poss ible
comma nds read, press the
10, I button on the
mul tifunction steering wheel briefly and say
Help .
For the syst em to understand you:
Speak clearly and dist inctly at a normal volume .
Speak louder when d riving faster .
Emphasize the words in the commands evenly
and do not leave long pauses .
Do not speak a command when the voice recogni­
tion system is making an announcement .
Close the doors, the windows and the sunroof* to reduce bac kground noise. Make sure t hat passen-
108
gers are not speaking when you are giv ing a voice
command .
Do no t direc t the air ve nts toward the handsfree
micropho ne, which is nea r the fron t interior
li ghts on the roof headliner/on thedriver's safety
belt*. For additional information on the safety
belt m icrophone, see ¢
page 125.
Only use the system from the dr ive r's seat be­
ca use the hands free microphone is directed to ­
ward that seat .
Additional settings
See ¢ page 180, Voice recognition system.
.&_ WARNING
-Dire ct yo ur full attention to dr iv ing . As the
driver, you have complete responsibility fo r
safety in traffic. Only use the functions in
such a way that yo u always maintain com­
plete contro l over your vehicle in a ll traffic
situations.
- Do not use the voice recognition system in
emergencies beca use your voice may change
in stressful s ituations. It may take longer to
dia l the number or the system may not be
ab le to dial it at all. Dial the emergency
number manually .
(D Tips
-The d ialog pauses when there is an incom­
ing phone call and will continue if you ig­
nore the call. The dia log ends if you answer
the ca ll.
- There are no navigation prompts* when a di­ alog is act ive .
- You can select an item in the list using ei­
ther the vo ice recognit ion system or the
control knob .
Command overview
information
Appl ies to: vehicles with voice recognition system
The following overv iews describe the comma nds
that can be used to operate the MMI using the
voice recognition system. ..,.

Child safety
Advanced front airbag system and children
Your vehicle is equipped with a front "Advanced
Airbag System" in compliance with United States Federal Motor Vehicle Safety Standard (FMVSS)
208 as applicable at the time your vehicle was
manufactured.
The Advanced Airbag system in your vehicle 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
"suppression" requirements of the Safety Stand­
ard, to turn off the front airbag for infants up to
12 months who are restrained on the front pas­
senger seat in child restraints that are listed in
the Standard .
Even though your vehicle is equipped with an Ad­
vanced Airbag system, a child should always ride
in the seat properly restrained for its age and
size . The airbag on the passenger side makes the
front seat a potentially dangerous place for a
child to ride. The front seat is not the safest place
for a child in a forward-facing child safety seat. It
can be a very dangerous place for an infant or a larger child in a rearward-facing seat .
The vehicle's Advanced Airbag 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 child 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 ch ild, a child restraint, and a baby blanket
are on the front passenger seat. The change in
the measured capacitance due to the presence of
a child, a child restraint, and a baby blanket on
the front passenger seat is related to the child
restraint system resting on the seat. The meas­
ured capacitance of a child restraint system var­ ies depending on the type of system and specific
make and model.
220
The electrical capacitance of the various types, makes, and models of child restraints specified
by the U.5 .National Highway Traffic Safety Ad­
ministration (NHTSA) in the relevant safety
standard are stored in the Advanced Airbag Sys­
tem control unit together with the capacitances
typical of infants and a 1-year old child . When a
child restraint is used on the front passenger
seat with a typical 1 year-old infant, the Ad­
vanced Airbag System compares the capacitance
measured by the capacitive passenger detection
system with the data stored in the electronic con­
trol unit.
Child restraints and Advanced front airbag
system
Regardless of the child 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 airbag. If in exceptional circumstan­
ces you must use it on the front passenger seat,
carefully read all of the information on child safe­
ty and Advanced Airbags and heed all of the ap­
plicable WARNINGS. Make certain that the child
and child restraint are correctly recognized by the
capacitive passenger detection system in the
front passenger seat, that the front passenger
airbag is turned off, and that the airbag status is
always correctly signaled by the
PASSENGER AIR
BAG OFF~;
light.
Many types and models of child restraints have
been available over the years, new models are in­
troduced regularly incorporating new and im­
proved designs and older models are taken out of
production. Child restraints are not standardized.
Child restraints of the same type typically have
different weights and sizes and different "foot­
prints", the size and shape of the bottom of the
child restraint that sits on the seat, when they
are installed on a vehicle seat. These differences
make it virtually impossible to certify compliance
with the requirements for advanced airbags with each and every child restraint that has ever been
sold in the past or will be sold over the course of
the useful life of your vehicle. ..,.

a, a, .... N
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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 man ufac­
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 ho ur period before the tire
pressure is measured or adjusted.
Curb weight
means the weight of a motor ve­
hic le with standard equipment in­
c lud ing the maximum capac ity of
fuel, oil, and coolant, a ir condi­
tioning and add itional weigh t of
optional equ ipment .
Extra load ti re
means a tire designed to operate
at higher loads and at h igher in­
flation pressures than the corre­
sponding standard tire . Extra load
tires may be ident ified as "XL",
Wheels
"xl" "EXTRA LOAD" or "RF" on , ,
the sidewall.
Gross Axle Weight Rating
("GAWR")
means the load-carrying capacity
of a single axle system, measured
at the tire-ground in terfaces.
Gross Vehicle Weight Rating
( " GVWR ")
means the maxim um total loaded
weight of the vehic le.
Groove
means the space between two ad ­
jacent tread ribs .
Load rating (code)
means the maxim um load that a
tire is rated to carry for a g iven in­
flation pressu re. You may not find
this informat ion on all tires be­
ca use it is no t requ ired by law.
Maximum load rating
means the load rating for a tire at
the maximum permissible infla­
tion pressure for that tire .
Maximum loaded vehicle
weight
means the sum of:
(a) Curb weight
(b) Accessory we ight
2 4 9
...

a, a, .... N
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" V, a:,
Rim
means a metal support for a tire
or a tire and tube assembly upon
which the tire beads are seated.
Rim di amet er
means nominal diameter of the
bead seat. If you change your
wheel size, you will have to pur­
chase new tires to match the new
rim diameter.
Rim size designation
means rim diameter and width.
Rim width
means nominal distance between
rim flanges.
Sidewall
means that portion of a tire be­
tween the tread and bead.
Speed rating (letter code )
means the speed at wh ich a tire is
designed to be driven for extend­
ed periods of time . The ratings
range from 93 mph (150 km/h)
to 186 mph (298 km/h)
¢ table
on page 247.
You may not find
this information on all tires be­
cause it is not required by law.
The speed rating letter code,
where applicable, is molded on
the tire sidewall and indicates the
Wheels
maximum permissible road
speeds
¢ A in Winter tires on
page 261.
T ire pressure mon itoring
system *
means a system that detects
when one or more of a vehicle's
tires are underinflated and illumi­
nates a low tire pressure warning
telltale.
T read
means that portion of a tire that
comes into contact with the road .
Tread separation
means pulling away of the tread
from the tire carcass.
Treadwear indicators (TWI )
means the projections within the
principal grooves designed to give
a visual indication of the degrees
of wear of the tread. See
¢ page 255, Treadwear indicator
for more information on measur­
ing tire wear .
Uniform Tire Quality Grading
is a tire information system devel­
oped by the United States Nation ­
a l Highway Traffic Safety Admin­
istration (NHTSA) that is designed
to help buyers make relative
25 1
..

a, a, .... N
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" V, a:,
Occupant loading and distri­
but ion for vehicle normal load
for various design ated se ating
c a pa cit ies
Refer to the tire inflation pres­
sure label for the number of seat­
ing positions. Refer to the table
¢ table on page 258 for the
number of people that corre­
spond to the vehicle normal load.
New tires or wheels
Audi recommends having all work on tires or wheels performed by
an authorized Audi dealer or au­
thorized Audi Service Facility.
These facilities have the proper knowledge and are equipped with
the required tools and replace­ ment parts.
... New ti res do not yet have the
optimum gripping properties.
Drive carefully and at moderate
speeds for the first 350 miles (500 km) with new tires.
... Use ti res of the same construc ­
tion, size (rolling circumference)
and as close to the same tread
pattern as possible on all four
wheels.
11> D0 not replace tires individually .
At least replace both tires on the
same axle at the same time .
Wheels
11> Audi recommends that you use
Audi Original Tires . If you would
like to use different tires, please
note that the tires may perform
differently even if they are the
same size
c:> A -
.. If you would like to equip your
vehicle with a tire/rim combina­
tion that is different from what
was installed at the factory, con ­
sult with an authorized Audi
dealer or authorized Audi Service Facility before making a pur ­
chase
c:::> A .
The spare tire* is different from
the regular tires installed on the
vehicle -for example, if winter
tires or wide tires are installed -
so only use the spare tire* tempo­
rarily in case of emergency and
drive carefully while it is in use . It
should be replaced with a regular
tire as soon as possible.
On
a ll w heel drive vehicles, all
four wheels must be equipped
with t ires that are the same brand
and have the same construction
and tread pattern so that the drive system is not damaged by
different tire speeds. For this rea­
son, in case of emergency, only use a spare tire* that is the same .,.
253

Wheels
circumference as the regular
tires.
A_ WARNING -
-Only use tire/rim combina­
tions and suitable wheel bolts
that have been approved by
Audi. Otherwise, damage to
the vehicle and an accident could result.
-For technical reasons, it is not
possible to use tires from oth­
er vehicles -in some cases,
you cannot even use tires from
the same vehicle model.
-Make sure that the tires you
select have enough clearance
to the vehicle. Replacement
tires should not be chosen simply based on the nominal
size, because tires with a dif­
ferent construction can differ greatly even if they are the
same size. If there is not
enough clearance, the tires or
the vehicle can be damaged and this can reduce driving
safety and increase the risk of
an accident.
- Only use tires that are more
than six years old when abso­
lutely necessary and drive
carefully when doing so.
254
-Do not use run-flat tires on
your vehicle. Using them when not permitted can lead to ve­
hicle damage or accidents .
-If you install wheel covers on the vehicle, make sure they al­
low enough air circulation to
cool the brake system. If they
do not, this could increase the risk of an accident.
Tire wear/damage
Fig. 189 Tire profile : treadwear indica­
tor
Tire wear
Check the tires regularly for wear.
-Inflation pressure that is too low
or high can increase tire wear
considerably.
-Driving quickly through curves, rapid acceleration and heavy
braking increase tire wear.
-Hav e an authorized Audi dealer
or authorized Audi Service Facili­
ty check the wheel alignment if
there is unusual wear .
..

a, a, ... N
" N ... 0
" V, a:,
the risk of an accident. Read
and follow the important safe­
ty precautions inc:::>
page 258 ,
Tires and vehicle load limits.
-The tire must flex more if the tire pressure is too low or if
the vehicle speed or load are
too high . This heats the tire up
too much . This increases the
risk of an accident because it
can cause the tire to burst and result in loss of vehicle con­
trol.
- Incorrect tire pressure in ­
creases tire wear and has a negative effect on driving and
Tire pressure table
Please note that the information
contained in the following table
was correct at the time of print­ ing , and the information is sub­
ject to change . If there are differ­
ences between this information
and the tire pressures specified
on the label on the driver's side B­
pillar, always follow the specifica­
tion on the B-pillar label
~ page 256, fig. 190.
Wheels
braking behavior, which in ­
creases the risk of an accident.
Replace lost valve caps to re­
duce the risk of damage to the
tire valves.
Tire pressure that is too low in­ creases fuel consumption.
Audi recommends using the
tire pressure specified for a
normal load c:::>
table on
page 258
or for a full load
when the vehicle is partially
loaded .
Make sure that the tire designa­
tion on your tire matches the des­
ignation on the tire pressure label
and the tire pressure table .
The following table lists recom ­
mended tire pressures in cold
tires according to the load and
the size of the tires installed .
257