weight AUDI TT ROADSTER 2018 User Guide

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seat if the device is connected to the 12·
volt socket or the cigarette lighter socket.
-If a seat heater has been retrofitted or
otherwise added to the front passenger
seat, never install any chi ld restraint sys­
tem on this seat.
-Make sure that there are no wet objects
(such as a wet towel) and no water or oth­
er liqu ids on the front passenger seat
cushion.
-Never place objects on the seat (such as a
laptop, CD player, electronic games de­
vice, power inverter or seat heater for
child seats). These may influence the elec­
tr ica l capacitance measured by the capaci­
tive passenge r de tection system and can
also fly around in an accident and cause
serio us personal i njury.
- Always buckle the child sa fe ty seat firmly in
place even if a child is not sitting in it. A
loose child safety seat can fly around during
a sudden stop or in a collision .
-Always read and heed all WARNINGS when ­
ever using a child restrained in a veh icle is
being
used¢ page 187, Safety belts,
¢page 194, Airbag system and
¢ page 216, Child safety.
A WARNING
To reduce the risk of serious injury, make sure
that the
PASSENGER AIR BAG OFF ~; light
comes on and stays on whenever a child re­
st rai nt is ins talled on the front passenger seat
and the ignition is sw itched on.
- Never install a reward facing ch ild safety
seat on the front passenger seat if the
PAS ·
SENGER AIR BAG
OFF ~; light does no t
t u rn on and stay on.
- Have the airbag system inspected by your
authorized Audi dealer i mmediately.
Ch ild s afe ty
Child safety seats
Infant seats
Babies and infants up to about one year old and
20 lbs or
9 kg need special rearward-facing child
restraints that support the back, neck and head
in a crash .
Fig. 1 69 Rearwa rd-facing infant seat, prope rly installed on
the passenger seat
.,. When using the vehicle safety belt to install a
child safety seat, yo u m ust fi rst ac tivate the
convertib le lo ckin g re trac tor on the safety belt
t o p revent t he ch ild safety seat from moving
¢ page 225 .
.,. Push the ch ild safety seat down with your full
weight to get the safety belt really tight so that
the seat cannot move forward and sideways
more than 1 in (2.S cm).
Infants up to about one yea r (20 lbs or 9 kg) are
best protected in special infant carr iers and child
safety seats designed for their age group. Many
experts be lieve that infants and small ch ildren
should ride only in special restra ints in wh ich the
child faces the back of the vehicle. These infant
seats support the baby's back, neck and head in a
cr ash
¢fig. 169.
A WARNING
No t using a child safe ty seat, using t he wrong
chi ld safety seat or imprope rly insta lli n g a
chi ld restraint increases the risk of ser ious
personal injury an d death in a crash.
-Never install a rear -fac ing ch ild restraint in
the forward-facing direction. Such restraints
are designed for the special needs of infants
and very small children and cannot protect
them proper ly if the seat is forward-facing.
221

Child safety
-Never install a rearward facing child safety
seat on the front passenger seat unless the
PASSENGER AIR BAG OFF,;; light comes
on and stays on . If the
PASSENGER AIR
BAG OFF
~; light does not come on and stay
on the inflating airbag will hit the child safe­
ty seat or infant carrier with great force and
will smash the child safety seat and child
against the backrest, center armrest, door
or roof. Have the airbag system inspected
immediately by your Audi dealer.
-Never place or use any electrical device
(such as a laptop, CD player, electronic
games device, power inverter or seat heater
for child seats) on the front passenger seat
if the device is connected to the 12-volt
socket or the cigarette lighter socket .
-If a seat heater has been retrofitted or oth·
erwise added to the front passenger seat,
never install any child restraint system on
this seat .
-Make sure that there are no wet objects
(such as a wet towel) and no water or other
liquids on the front passenger seat cushion .
-Never place objects on the seat (such as a
laptop, CD player, electronic games device,
power inverter or seat heater for child
seats). These may influence the electrical
capacitance measured by the capacitive pas­
senger detection system and can also fly
around in an accident and cause serious per­
sonal injury .
-Always read and heed all WARNINGS when­
ever using a child restrained in a vehicle is
being used
r=> page 187, Safety belts,
¢ page 194, Airbag system and
¢ page 216, Important information.
222
Convertible child safety seats
Properly used convertible child safety seats con
help protect toddlers and children over age one
who weigh between 20 and 40 lbs (9 and 18 kg)
in a crash .
.... a,
Fig. 170 Schem atic ov erview: ins tallation of t he se at us ing
the vehi cle's safety belt system
""When using the vehicle safety belt to install a
child safety seat, you must first activate the
convertible locking retractor on the safety belt
to prevent the child safety seat from moving
r=>page225.
"" Push the child safety seat down with your full
weight to get the safety belt really tight so that
the seat cannot move forward or sideways
more than 1 in (2.S
cm) ¢ page 225.
A toddler or child is usually too large for an in·
fant restraint if it is more than one year old and
weighs more than 20 lbs (9 kg).
Toddlers and children who are older than one
year up to about 4 years old and weigh more than
20 lbs (9 kg) up to 40 lbs (18 kg) must always be
properly restrained in a child safety seat certified
for their size and weight and
r=> fig. 170 .
A WARNING
Not using a child safety seat, using the wrong
child safety seat or improperly installing a
child restraint increases the risk of serious
personal injury and death in a collision or oth­
er emergency situation.
- Children on the front seat of any car, even
with Advanced Airbags, can be seriously in­
jured or even killed when an airbag inflates.
A child in a rearward-facing child safety seat
installed on the front passenger seat will be
~

Child safety
The vehicle 's safety belts alone will not fit most
chi ldren until they are at least 4
ft 9 in (57 in/
1.45 m) tall and weigh about 80 lbs (36 kg) .
Booster seats raise these children up so that the
safety belt will pass properly over the stronger
parts of their bodies and the safety belt can help
protect them in a crash .
.. Do not use the convertible locking retractor
when using the vehicle 's safety belt to restrain
a child on a booster seat .
.. The shoulder belt must lie as close to the cen­
ter of the child's collar bone as poss ible and
must lie flat and s nug on the upper body. It
must never lie across the throat or neck. The
lap belt must lie across the pelvis and never
across the stomach or abdomen . Make sure the
belt lies flat and snug . Pull on the belt to tight ­
en if necessary .
Chi ldren up to at least 8 years old (over 40 lbs or
18 kg) are best protected in chi ld safety seats de­
signed for their age and weight . Experts say that
the skeleta l structure, particularly the pelvis, of
these children is not fully developed, and they
must not use the vehicle safety belts without a
suitable child restraint.
It is usually best to put these children in appro­
priate booster seats. Be sure the booster seat
meets all applicable safety standards .
Booster seats raise the seating position of the
child and repos ition both the lap and shoulder
parts of the safety be lt so that they pass across
the child's body in the right places. The rout ing of
the belt over the child's body is very important
for the child's protection, whether or not a boos­
ter seat is used.
Never use the lap belt portion of the vehicle's
safety belt alone to restrain any child, regardless
of how big the child is. Always remember that
chi ldren do not have th e pronounced pelvic struc­
ture required fo r the proper function of lap belt
port ion of the vehicle's three point lap and
shoulder belts. The child's safety absolute ly re ­
quires that a lap belt portion of the safety belt be
fastened snugly and as low as possible around the pelvis . Never let the lap belt portion of the
224
safety belt pass ove r the child's stomach or abdo­
men .
In a crash, airbags must inflate w ith in a blink of
an eye and with considerable force. In order to do
its job, the airbag needs room to inflate so that it
will be there to protect the occupant as the occu ­
pant moves forward into the airbag .
A ve hicle occ upant who is o ut of pos it io n and too
close to the airbag gets in the way of an inflating
airbag . When an occupant is too close, he or she
will be struck vio lent ly and w ill rece ive serious or
possibly even fatal injury.
In order for the airbag to offer protection, it is
important that all vehicle occupants, especially
any ch ildren, who m ust be in the front seat be­
cause of exceptional c ircumstances, be properly
restrained and as far away from the airbag as
possible . By keeping room between the child 's
body and the front of the passenger compart­
ment, the a irbag can inflate completely and pro­
v ide supplementa l protection in certa in frontal
collisions.
_& WARNING
Not using a booster seat, using the booster
seat improperly, incorrect ly installing a boos­
ter seat or using the ve hicle safety belt im­
properly increases the r isk of serious personal
injury and death in a collision or other emer­
gency situation. To he lp reduce the risk of se­
rious personal injury and/or death:
- The shou lder belt must lie as close to the
center of the child' s collar bone as possible
and must lie flat and snug on the upper
body. It must never lie across the throat or
neck. The lap belt must lie across the pelvis
and never across the stomach or abdomen.
Make sure that the belt lies flat and snug .
P ull on the belt to tighten if necessary .
- Failur e to properly route safety belts over a
child's body will cause severe injuries in an
accident or other emergency situation
¢page 187.
- The rear side of the child safety seat should
be positioned as close as possible to the
backrest on the ve hicle seat .
-

Cl 00 .-< N r-­N .-< 0 r-­Vl 00
~ Route it around or through the child restraint
belt path
¢ ,& .
~ Push the child safety seat down with your fu ll
weight to get the safety be lt really t ight.
~ Insert the belt tongue into the buckle for that
seat ing pos ition .
~ Guide the safety belt back into the retractor un­
t il the belt lies flat and snug on the ch ild safety
seat.
~ Yo u should hear a "clicking" no ise as the belt
winds back into the inertia reel. Test the con ­
vertib le locking retractor by pu lling on the belt .
Yo u should no longer be ab le to p ull the belt
o ut of the retractor. The convertible locking re­
tractor is now activated .
~ Make sure that the red release button is fac ing
away from the child restraint so that it can be
unbuckled qu ickly .
~Pullon the be lt to make sure the safety belt is
prope rly tig ht and fastened so that the seat
canno t move forward and s idew ays more th an
1 in (2 .5 cm).
A WARNING
Using t he wrong child restraint or an improp ­
erly installed c hild restraint can cause ser ious
personal inju ry or death in a cras h.
- Always make sure that the safety belt re -
tractor is locked when install ing a child
safety seat. An unlocked safety belt retrac­
tor cannot hold the child sa fety seat in place
dur ing normal dr iving or in a crash.
- Always buckle the child safety seat firmly in
place even if a child is not sitting in it. A
loose child safety seat can fly around duri ng
a sudden stop or in a crash.
- Always make sure the seat backrest to which
the ch ild restraint is installed is in an up­
r ight position. Ot he rw ise, the seatback w ith
the ch ild safety sea t atta ched to i t could fly
f orward in the even t of an ac cident o r othe r
eme rgency si tuation .
- Alw ays read and heed all WAR NINGS w hen ­
ever using a child restra ined in a veh icle is
being used
¢ page 216. Specia l preca utions
app ly when installing a child safety seat on
the front passenger seat
9 page 195, Child
Ch ild saf ety
restraints on the front seat -some impor ­
tant things to know.
Deactivating the convertible locking
retractor
The convertible locking retractor for child re­
straints will be deactivated automatically when
the belt is wound all the way back into the re ­
tractor .
~ Press the red button on the safety belt buckle.
The belt tongue will pop out of the buck le.
~ Guide the safety belt all the way back into its
stowed posit ion .
Always let the safety belt retract completely into its stowed posit ion . The safety be lt can now be
u sed as an ord inary safety belt w ithout the con­
vertib le locking ret racto r fo r ch ild rest raints .
If the convertible locking retractor should be ac­
t ivated inadvertently, the safety belt must be un­
fastened and guided completely back into its
stowed pos ition to deactivate th is feature .
If the
conve rtible locking retractor is not deactivated,
t h e safety be lt will g radu ally become tigh ter and
u ncomfortab le to wear.
A WARNING ,..__ -
I mproper ly installed child safety seats in­
crease the risk of se rious persona l injury and
death in a co llision.
- Never unfasten the safety belt to deactivate
the co nvertib le locking ret racto r fo r ch ild re­
stra ints w hile the vehicle is mov ing. You
wou ld not be restrained and could be seri­
ously injured in an accident .
- Always read and heed all WARNINGS when­
ever us ing a chi ld restrained in a vehicle is
be ing used
¢ page 216. Special p recautions
apply when install ing a child safety seat on
the fro nt passenge r
seat¢ page 195, Child
restrain ts on the front seat
-some impor­
tan t things to know.
227

Wheel s
0 US DOT number (TIN) and
manufacture date
T he manufacture date is listed on
the tire sidewall (it may only ap­
pear on the inner side of the tire) :
DOT ... 2217 ...
means, for example, that the tire
was produced in the 22nd week of
the year 2017.
@ Audi Original 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
able to provide you with more in­
formation.
® Mud and snow capability
"M/5" or "M+S" indicates the tire
has properties ma king it suitable
to drive in mud or snow.
& indi­
cates a winter t ire .
@) Compos ition of the tire cord
and materials
T he number of plies indicates the
number of rubberized fabric lay­
ers in the tire . In general: the
more layers, the more weight a
246
tire can carry. Tire manufacturers
must also specify the materials
used in the tire . These include
steel , nylon, po lyester 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,
tr action and temper ature
resistance
Treadwear, traction and tempera­
ture
ranges ~ page 260.
@ Running direction
@Maximum permitted
inflation pressure
This number indicates the maxi ­
mum pressure to which a tire can
be inflated under normal operat­
ing condit ions .
Glossary of tire and loading
terminology
Accessory weight
means the comb ined weight (in
excess of those standard items
which may be replaced) of auto­ matic transmission, power steer -
ing, power brakes, power
..

windows, power seats, radio, and heater, to the extent that these
items are available as factory- in­
stalled equipment (whether in­
stalled or not) .
Aspect ratio
means the ratio of the height to
the width of the tire in percent .
Numbers of 55 or lower indicate a
low sidewall for improved steer­
ing response and better overall
handling on dry pavement .
Bead
means the part of the tire that is
made of steel wires , wrapped or
reinfo rced 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 t ire pressure recom­
mended by the vehic le manufac­
turer for a tire of a designated
Wheels
three hour period before the tire
pressure is measured or adjusted .
Curb weight
means the weight of a motor ve­
hicle with standar d equipment in ­
c luding the maximum capacity of
f u el, oi l, and coolant, air condi ­
tioning and additional weight of
optional eq uipment.
Extra load ti re
means a t ire designed to operate
at higher loads and at higher in ­
flation pressures than the corre­
sponding s tandard tire. Extra load
ti res may be identified as
"XL",
"xl" "EXT RA 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 interfaces.
Gross Vehicle Weight Rating
( " GVWR ")
means the maxim um total loaded
weight of the vehic le .
Groove
size that has not been driven for means the space between two ad -
~ more than a co uple of miles (kilo -jacent tread ribs . .,.
"
8 meters) at low speeds in the
" "' a:,
2 47

Wheel s
Load rating (code )
means the maximum load that a
tire is ra ted to carry for a given in­
flation pressure. You may not find
this info rmatio n on all tires be­
cause it is not required 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 weight
(c) Vehicle capacity weight, and
(d) Production options weight
Ma ximum (permissible )
inflation pressure
means the maximum cold infla­
tion pressure to which a tire may be inflated . A lso 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 total seating
capacity of your vehicle.
248
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 distance be­
tween the exteriors of the side­
walls of an inflated tire, inc lud ing
elevations due to labeling, deco­ rations, or protective bands or
ribs.
Ply
means a layer of rubber-coated
parallel cords.
Production options weight
means the combined weight of
those installed regular production options weighing over 5 lbs
(2 .3 kg) in excess of those stand­
ard items which they replace, not
previously considered in curb
weight or accessory weight, in­ cluding heavy duty brakes, ride
levelers, roof rack, heavy duty
battery, and special trim.
Radial ply ti re
means a pneumatic tire in which
the ply cords that extend to the
...

Wheel s
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 253, 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
al Highway Traffic Safety Admin­
istration (NHTSA) that is designed
to help buyers make relat ive com­
parisons among tires. The UTQG
is not a safety rat ing and not a
guarantee that a tire will last for
a prescr ibed number of miles
( kilometers) or perform in acer­
tain way . It simply gives tire buy­
ers additional information to
combine with other considera­
tions, such as price, brand loyalty
and dealer recommendations . Un­
der UTQG, t ires are graded by the
tire manufacturers in three areas:
treadwear, traction, and tempera­
ture resistance . The UTQG infor -
250
mation on the tires , molded into
the sidewalls .
U.S. DOT Tire Identification
Number (TIN )
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 manufac­ tured, and the last four numbers
represent the week and year of
manufacture . Fo r example,
DOT ... 2217 ...
means that the tire was produced
in the 22nd week of 2017. The
other numbers are marketing co ­
des that may or may not be used by the tire manufacturer. This in ­
formation is used to contact con ­
sumers if a tire defect requires a recall.
Veh icle capac ity weight
means the rated cargo and lug ­
gage load plus 150 lbs (68 kg)
times the veh icle's designated
seating capacity.

0
Vehicle maximum load on the
tire
means that load on an individual
tire that is determined by distrib­
uting to each axle its share of the
maximum loaded vehic le we ight
and dividing by two .
Vehicle normal load on the tire
means that load on an individual
tire that is determined by distrib ­
uting to each axle its share of the
curb weight, accessory weight,
and normal occupant weight (dis­
tributed in accordance
with ¢ ta­
ble on page 256)
and dividing by
two .
Occupant loading and distri­
bution for vehicle normal load
for various designated seating
capacities
Refer to the tire inflation pres­
sure label for the number of seat ­
ing positions . Refer to the tab le
¢
table on page 256 for the
number of people that corre­
spond to the vehic le normal load .
New tires or wheels
Audi recommends having all wo rk
on t ires or wheels performed by
~ an authorized Audi dealer or au-N
" ~ thorized Audi Service Facility. 0
" "' a:,
Wh eel s
These facilities have the proper
knowledge and are equipped with
the required tools and replace­ ment parts.
.,. New tires do not yet have the
optimum g ripping properties.
Drive carefully and at moderate
speeds for the first 350 miles
(500 km) with new tires .
i,.Qnly use tires w ith the same de­
sign, size (rolling circumfer ­
ence), and as close to the same
tread pattern as possible on all
four whee ls .
.,. Do not replace tires individually .
At least replace both tires on the
same axle at the same t ime.
.,. 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
¢ ,& .
.,. If you would like to equip your
vehic le w ith a tire/r im combina­
tion that is different from what
was installed at the factory, con­
sult w ith an authorized Audi
dealer or authorized Audi Service
Facility before making a pur-
chase¢ ,&.. .,.
25 1

Wheels
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 254, fig. 189.
Make sure that the tire designa­
tion on your tire matches the des-
Model/ Tire designation
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.
Tire pressure
Engine Normal load Maximum load
(up to 2 people)
front
PSI
TT : 245/45 R17 95Y 32
2.0 l
245/40 R18 93H 32
4-cylinder
245/40 R18 93Y 32
245/35 R19 93Y 35
255/30 R20 92Y 35
A WARNING
Please note the important safe­
ty precautions regarding tire
pressure ¢ page 254 and load
limits¢ page 256.
Tires and vehicle load limits
There are limits to the amount of
load or weight that any vehicle
and any tire can carry. A vehicle
that is overloaded will not handle
well and is more difficult to stop.
Overloading can not only lead to loss of vehicle control, but can al­
so damage important parts of the
vehicle and can lead to sudden
tire failure, including a blowout
256
kPA
220
220
220
240
240
rear front rear
PSI kPA PSI kPA PSI
29 200 33 230 30
29 200 33 230 30
29 200 33 230 30
32 220 35 240 32
32 220 38 260 32
and sudden deflation that can
cause the vehicle to crash.
kPA
210
210
210
220
220
Your safety and that of your pas­
sengers also depends on making
sure that load limits are not ex­
ceeded. Vehicle load includes ev­
erybody and everything in and on
the vehicle. These load limits are
technically referred to as the vehi­
cle's
Gross Vehicle Weight Rat­
ing
("GVWR").
The "GVWR" includes the weight
of the basic vehicle, all factory in­
stalled accessories, a full tank of
fuel, oil, coolant and other fluids
plus maximum load. The maxi­
mum load includes the number
of .,.