brakes AUDI TT 2013 Owner´s Manual

202 Tire s and whee ls
vehicle with diffe rent rims/ti res or you bought
the vehicle as a previously owned vehicle.
Remembe r, your safety and that of your pas­
sengers also depends on mak ing sure that
l oad limits are not exceeded . Vehicle load in­
cludes everybody and everything in and on the
ve hicle . These load limits are technically refer­
red to as the vehicle's Gross Vehicle Weight
Rating ("GVWR"). The Gross Axle Weight Rat­
ing ("GAWR") is the maximum load that can
be applied at each of the veh icle 's two axles.
The Gross Vehicle Weight Rating and the
Gross Axle Weight Rat ing a re listed on the
safety compliance st icker labe l located on the
d river's side B-pi llar. T he tire pressure label on
your Audi lists the maximum combined weight of a ll of the occupants and luggage or
othe r cargo that the vehicle can carry. For the
locat ion of the tire pressure label¢
fig. 142.
A WARNING
Overloading a vehicle can cause loss of ve­
hicle control, a crash or other accident, se­
r ious personal injury, and even death.
- Carry ing more weight than your vehicle
was designed to carry will prevent the
vehicle from handling p roperly and in­
c rease the risk of a loss of veh icle con­
tro l.
- T he brakes on a veh icle that has been
overloaded may not be ab le to stop the
vehicle within a sa fe distance.
- Ti res on a vehicle that has been overload­
ed can fail suddenly causing loss of con­
tro l and a crash .
A WARNING
-Incorre ct tire pressures and/or underin­
flation can lead to a serious o r fatal acci ­
dent.
- Incorrect tire pressures and/or underin­
flation cause increased tire wear and can affect the handling of the vehicle .
- Incorrect tire pressures and/o r underin­
flation can also lead to sudden tire fai l­
ure, incl uding a blowo ut and sudden de­
flation, causing loss of vehicle control.
Checking tire pressure
The correct tire pressure for the tires original­
ly installed on your vehicle is listed on the tire
pressure label located on driver's side 8-pil­ lar.
The recommended tire pressures are on the
t ire pressure label and in the table
¢
page 200, Cold tire inflation pressure. This
means tha t the pressu re must be che cked and
adjus ted whe n the t ire has not been dr iven fo r
more than a couple of miles (kilometers) at
l ow speeds d uring the previous t hree ho urs.
Air in the tires expands when the tire heats up
as a result of interna l friction as it flexes in
use. The tire pressure is higher when the tire
has warmed up than when it is "cold."
It is the inflation pressure in a "co ld" tire that
counts. Therefore, you should never let air out
of a warm tire to match "Cold tire inflat ion
pressure" recommendat ions ¢
page 200 . The
t ires would then be unde rinflated and could
fail suddenly .
The tire pressure label on your Audi lists the
recommended co ld tire inflation pressures fo r
the new, orig inal equ ipment tires that were
on your veh icle at the time it was manufac­
tu red. Fo r the location of the labe l
¢page 200, fig . 142.
Most t ires lose air naturally over t ime . They
can a lso lose some air if you d rive over a pot­
hole or hit a curb while park ing. It is usually
not poss ible to see whethe r the rad ial tires
u sed today are underinfla ted just by loo king
at them .
T he refore, be sure to check t ire p ressu res at
least on ce a mo nth and a lways befo re going
on a long trip. Ma ke s ure to ta ke the n umbe r
of peop le and the amount of luggage into ac ­
count when adjusting tire pressure for a trip -
even one that yo u wo uld not consider to be
"long." See ¢
page 204, Tires and vehicle
load limits
for more important information.
Always use an accurate tire press ure ga uge
when checking and ad justing inflation pres­
s u res. Check all of the tires and be sure not to ..,.

204 Tire s and wheel s
-If the tire pressure is too low or too high,
the tires w ill wear prematurely and the
vehicle will not handle well.
- If the tire is not flat and you do not have
to change a wheel immed iately, drive at
reduced speed to the nearest service sta­
t ion to check the tire pressure and add
air as required.
(D Note
Dr iving without valve stem caps can cause
damage to the t ire va lves. To prevent this,
always make sure that facto ry installed
valve stem caps on all wheels a re securely
mounted on the valve.
@ For the sake of the environment
Underinf lated tires will a lso increase the
fue l cons umption .
Tires and vehicle load limits
There are limits to the amount of load or
weight that any veh icle and any t ire can c arry.
A vehicle that is overloaded w ill not h andle
well and is more difficult to stop. Over load ing
can not on ly lead to loss of vehicle contro l,
but can a lso damage important parts of the
vehicle 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 your passengers a lso
depends on making sure that load limits are
not exceeded. Vehicle load includes everybody
and eve ryth ing in and on the vehicle . These
l oad limits a re tech nica lly refe rred to as the
ve hicl e's
Gros s Vehicl e W eight Rat ing
("GVWR").
The "GVWR" includes the we ight of the basic
vehicle, all factory installed accesso ries , a fu ll
tank of f uel , oi l, coo lant and othe r fluids plus
maximum load. The maxim um load includes
the number o f passengers that the vehi cle is
intended to carry ("seating capacity") with an
assumed weig ht of 150 lbs (68 kg) for each
passenger at a designated seating position and the total weight of any luggage
in the ve ­
hicle .
T he
Gro ss Axle Weight Rating (" GAWR") is
the max imum load th at can be applied at e ach
of the vehicle's two axles .
T he Gross Vehicle Weight Rat ing and the
G ross Ax le Weight Ra ting are listed on the
sa fety comp liance s ticke r label lo cated on the
driver's side B-pillar. Your Audi has 4 seat ing
positions, 2 in the front and 2 in the rear fo r
total seat ing capac ity of 4. Each seating posi­
t ion has a safety be lt c>
page 100 , Safety
bel ts.
The fact that there is an upper limit to yo ur
vehicle's Gross 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
mean that less we ight can be carried as lug­
gage.
The tire pressure label on your Aud i also lists
the max imum combi ned weig ht of all of the
occupants and luggage or other cargo t hat
t h e vehi cle can carry . Fo r th e lo cat ion of the
la bel c>page200,
fig.1 42.
_& WARNING ~
Overloading a vehicle can c ause loss o f ve-
h icle cont ro l, a c rash or other accident, se ­
rious pe rsonal injury, and even death.
- Ca rrying more we igh t tha n your veh icle
was des igned to carry wi ll prevent the
veh icle from handling proper ly and in­
crease the risk of the loss of ve hicle con­
trol.
- The brakes 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 s uddenly , incl uding a blowout
a nd sudden deflation, causing loss of
control and a crash .

210 Tire s and wheel s
Driving with different tires reduces vehi­
cle handling and can lead to a loss of
co ntrol.
- If the spare tire is not the same as the
t ires that are mounted on the veh icle -
for example with winter tires - on ly use
the spare tire for a short period of time
and dr ive with extra ca re. Refit the nor­
ma l road whee l as soon as safely possi­
ble.
- Never drive faste r than the maximum
speed for which the tires o n your veh icle
are ra ted because ti res th at are driven
faster than their rated speed can fail
sudden ly .
- Over loading t ires c ause heat b uild- up,
sudden tire failure, including a blowout
and sudden deflation and loss of control.
- T emperature grades app ly to tires t hat
are properly inflated and not over o r un­
derinflated.
- F or technical reasons it is not a lways
possible to use wheels from other
vehicles -in some cases not even w heels
from the same vehicle model.
- If you insta ll wheel trim discs on t he ve­
hicle whee ls, make sure that the air f low
to the brakes is not blocked. Reduced air­
flow to the brakes can them to overheat, increasing stopping distances and caus­
ing a collision.
- Run flat t ires may on ly be used on
vehicles that were equ ipped w it h them
at the facto ry. The vehicle must have a
chassis des igned for run f lat t ires and a
fac to ry-installed t ire p ress ure moni to r­
ing system that ind ic a tes a loss of tire
pressure. Incorrect use of run flat tires
can lead to vehicle damage or accidents .
Check with an a uth orized Audi dea ler or
t i re spec ialist to see i f your vehicle can be
equipped with run flat tires. If r un flat
t ires a re used, they must be installed on
all four wheels . M ixing tire types is not
permitted . (D Note
-For technical reasons, it is not generally
poss ible to use the w heel rims from oth­
er ve hicles. T his can hold tr ue for wheels
of the same vehicle type.
- If the spare tire is diffe rent from the
tires that you have mounted on your ve­
hicle (for example winter tires or wide
profi le tires), then use the spare tire for a
short period of time only and drive w ith
extra care. Replace the flat tire w it h the
ti re mat ching the othe rs on your vehicle
as soon as possi ble.
- N ever d rive without the valve stem cap.
T he v alves co ul d get damaged.
@ For the sake of the environment
Dis pose of o ld tires in accordance w ith the
l ocal requirements.
Uniform tire quality grading
- Tread wear
- Tra ction AA A B (
- Temperature ABC
Quality grades can be found where applicab le
o n the tire s ide wall between tread shoulder
and maximum section width
¢ page 207,
fig. 146.
For example: Tread wear 200 , Traction AA,
Temperature A.
All passenger car ti res must conform to Feder­
al Safety Req uirements in add ition to these
grades .
Tread wear
The tread wear g rade is a comparative rating
based on the wear rate of the tire when tested
u nder contro lled conditions o n a specified
government test course.
F o r example, a tire gra ded 150 wo uld wear
one and one ha lf (11/2) times as well on the
government course as a ti re graded 100.

248 Index
Connecting ...... ..... ... .. .. .... . 190
Disconnecting . ....... ... .. .. .... . 190
Important warn ings . .... ... .. .... . 192
Locat ion 192
Low . .. .. .... ........... ........ . 156
Replacing the battery ......... .. ... 191
State of charge ..... .... .. .. .. .. .. . 156
W inte r operation .......... ... .. .. . 190
Working on the battery .. ...... .. .. . 192
Battery voltage ................ .... .. 19
Before driving . . . . . . . . . . . . . . . . . . . . . . . 90
Blended gasoline ........... ... .. .. . 176
Body cavity sealing . . . . . . . . . . . . . . . . . . 170
Boost . .. .. .. .. . .......... .. .. .... .. 28
Booster seats .............. ... .. .. . 138
Boost pressure indicator . ... .. .... .. . . 28
Brake fluid
Changing the brake flu id . .. .. .. .. .. .
190
Chec king the bra ke fluid level . .. .... . 189
What is the correct brake fl uid leve l? .. 189
What should I do if the brake fluid warn-
ing light comes on? .. ... .. .. ... ... .
189
Brake fl uid reservo ir ........ .. .. .... . 189
Brake system .............. .... .... . 189
Anti -lock brake system ........ .. .... 18
Brake ass ist system . .. .. .. .. .. .. .. . 150
Brake fl uid . ... .. ..... ... .. .. .. .. . 189
Brake flu id spec ifica tions for refill and re-
p la cemen t ... ......... .. .. .. .. .. .
190
Brake light defect ive . ... .. .. .... .. . . 20
Brake pads .. .. .. ..... ... .. .. .... . 159
General information . ... .. .. ... ... . 153
How does the moisture or road sa lt affect
the brakes? .............. .. .. .... .
153
Malfunc tio n . . . . . . . . . . . . . . . . . . . . . . . 14
Warn ing/ indicator l ights ....... .. .... 14
Worn brake pads symbol . . . . . . . . . . . . . 18
Break- in period ............ .. .. .. .. . 159
Brake pads ... ........... .. .. .... . 159
Tires
Bulbs
C
159
23 1
Califo rni a Proposit ion 65 Warning .. .. . 18 1
Battery specif ic .. ..... ... .. .. .... . 193
Capac it ies . .. ..... ........... ... .. . 240
Car care . ... .... .. ... .. .. ... .... . .. 164
Interior . . . . . . . . . . . . . . . . . . . . . . . . . . 170
Plastic and vinyl . .... .. ..... ... .. .. 168
Care of ex ter ior .. .. ............. .. .. 164
Cargo area
refer to Luggage compartment ....... . 96
Cata lytic co nverter ... ... ..... ... .. .. 160
CD cha nger . .... .. ............. .... . 64
Certification . . . . . . . . . . . . . . . . . . . . . . . 246
Chang ing a flat t ire ... ... ..... ... .. .. 224
Chang ing engine oil ................ . 186
Chassis
Undercoating .. .. ............. .. ..
170
also refer to Audi magnet ic r ide .. .. .. . 78
Checking
Battery ac id leve l ... ... ..... ... .. ..
193
Engine coolant level . . . . . . . . . . . . . . . . 187
Checking t ire press ure ........... .. .. 2 02
Child restraint
Danger of using child rest raints in the
front seat . ...... ................ .
110
Child restraints
Where can I get additional informat ion
about child restraints and the ir use? ..
149
Child restraint system anchors . ... .. .. 143
Child saf ety . .. .. .. .. .. ...... ... .. .. 130
Co nvertib le loc king retractor ... .. .... 140
G ui dance fixtures for lower anc ho rages 1 4 5
Important sa fe ty instru ctions for using
child safety seats ... .... .... ... .. ..
133
Important things to know whe n driving
with children .... ............... ..
130
Installing a c hild restra int using the
LATCH system . . . . . . . . . . . . . . . . . . . . .
146
Mounting and releasing the anchorage
hook ...... ... .. .. ... ....... .... .
146
Tether anchors . .. ............. .... 14 7
Tether straps .. .. ............. .... 14 7
Child safety seat ..... ... ..... ... .. .. 135
Co nvertib le locking retractor ......... 140
Installing ... .. .. ... .. .. ... ..... .. 140
U nused safety be lts on the rear seat 135
Child safety seats
Booster seats .... ............... ..
138
Co nvertib le child seats ............ . 136
How do I properly i nstall a child safety
. h" l ? 133 seat in my ve 1c e .............. .. . .