brakes AUDI TT ROADSTER 2011 Owner's Manual

200 Tires and wheels
other cargo that the vehicle can carry. For the
location of the tire pressure label
r=:>fig. 146.
A WARNING
Overloading a vehicle can cause loss of ve­
hicle control, a crash or other accident, se­
rious personal injury, and even death.
- Carrying more weight than your vehicle
was designed to carry will prevent the
vehicle from handling properly and in­
crease the risk of a loss of veh icle con­
trol.
- The brakes on a vehicle that has been
overloaded may not be able to stop the
vehicle within a safe distance.
- Tires on a vehicle that has been overload­
ed can fail suddenly causing loss of con­
tro l and a crash.
A WARNING ,~ -
- Incorrect tire pressures and/or underin­
flation can lead to a serious or 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/or underin­
flation can also lead to sudden tire fa il­
ure, including a blowout 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 t ire pressures are on the
tire pressure labe l and in the table
r=:> page 198, Cold tire inflation pressure . This
means that the pressure must be checked and
adjusted when the tire has not been driven for more than a couple of miles (kilometers) at
low speeds during the previous three hours.
A ir i n the tires expands when the tire heats up
as a result of interna l fr iction as it flexes in use.
The tire pressure is higher when the tire
has warmed up than when it is "co ld."
It i s the inflation pressure in a "cold" tir e that
counts. Therefore, you should never let air out
of a warm tire to match "Cold tire inflation
pressure" recommendations
r=;, page 198. The
t ir es wou ld then be underinf lated and co uld
fail suddenly .
The tire pressure label on your Audi lists the
recommended cold tire inflation pressures for
the new, original eq uipment tires that were
on your veh icle at the time it was manufac­
tured. For the location of the labe l
r=:>page 198, fig . 146.
Most tires lose air natura lly over t ime. They
can a lso lose some air if you drive over a pot­
hole or hit a curb while park ing. It is usually
not possible to see whether the rad ial tires
used today are underinflated just by looking
at them.
Therefore, be sure to check t ire pressures at
least once a month and a lways before going
on a long trip . Make sure to take the number
of peop le and the amount of luggage into ac­
count when adjust ing tire pressu re for a trip -
even one that yo u wou ld not consider to be
" long." See
r=;, page 202, Tires and vehicle
load limits
for more important information.
Always use an accurate tire pressure gauge
when checking and adjusting inflation pres­
sures. Check all of the tires and be s ure not to
forget the spare tire. If the pressure in any tire
is too high when the tire is "cold," let air out
of the tire s low ly with the edge of the tire
gauge and keep checking the pressure until
you reach the pressure that is correct for the load (passengers and luggage) and kind of
dr iv in g you plan to do.
If the pressure in any tire is too low, note the
difference between the pressure in the cold
tire and the pressure you need and add the air
that you need to reach the correct pressure for
the vehicle load (passengers and luggage) for
the tires on your vehicle as listed on the on
your vehicle and in this manual and the kind
of driving you plan to do. .,..

202 Tires and wheels
@ 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 the amount of load or
weight that any vehicle and any t ire can carry.
A vehicle that is overloaded w ill not handle
well and is more difficult to stop. Overload ing
can not only lead to loss of vehicle control,
but can also damage important pa rts of the
vehicle and can lead to s udden tire failure, in­
cluding a blowout and sudden deflation that
can cause the vehicle 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 everything in and on the vehicle. These
l oad limits are technically referred to as the
vehicle's
Gross Vehicle Weight Rating
("GVWR").
The "GVWR" includes the weight of the basic
vehicle, all factory installed accessories, a full
tank of fuel, oil, coo lant and other fluids plus
maximum load. The maximum load includes
the number of passengers that the vehicle is
intended to carry ("seating capacity") with an
assumed weight of 150 lbs (68 kg) for each
passenger at a designated seat ing pos ition
and the total weight of any l uggage in the ve­
h icle.
The
Gross Axle Weight Rating ("GAWR") is
the maximum load that can be app lied at each
of the vehicle's two axles.
The Gross Vehicle Weight Rating and the
Gross Axle Weight Rating are listed on the
safety compliance stick er labe l located on the
driver 's side 8-p illar. Your Audi has 2 seat ing
positions. Each seating pos ition has a safety
be lt ¢
page 107, Safety belts.
The fact that the re is an upper limit to your
vehicle's Gross Vehicle Weight Rating means
that the tota l weight of whatever is being car­
ried in the vehicle is limited. The more passen­
gers in the vehicle or passengers who are heavier
than the standard weights assumed
mean that less weight can be carried as lug­
gage.
T he tire pressure label on your Audi also lists
the maximum combined weight of a ll of the
occupants and luggage or other cargo that
the vehicle can carry. For the location of the
label ¢
page 198, fig. 146.
A WARNING
Overloading a vehicle can cause loss of ve­
h icle control, a crash or other accident, se­
rious personal injury, and even death.
- Carrying more we ight than your veh icle
was des igned to carry will prevent the
veh icle from handling properly and in­
crease the risk of the loss of vehicle con­
trol.
- The brakes on a vehicle that has been
overloaded may not be able to stop the
veh icle w ithin a safe distance .
- Tires on a vehicle that has been overload­
ed can fail suddenly, including a blowout
and 5udden deflation, cau5ing lo55 of
control and a crash.
Determining correct load limit
Use the example below to cal­
culate the total weight of the passengers and luggage or oth­
er things that you plan to trans­
port so that you can make sure
that your vehicle will not be
overloaded.
Steps for Determining
Correct Load Limit
1. Locate the statement "THE
COMBINED WEIGHT OF QC­
CU PANTS AND CARGO
SHOULD NEVER EXCEED XXX .,..

general, the greater the number of plies, the more weight a tire can support . Tire manufac­
turers also must indicate the materials in the
tire, wh ich include steel, nylon, polyester, and
others .
Ma ximum Load R ating
This number indicates the maximum load in
kilograms and pounds that can be carried by
the tire.
Tire qualit y gr ad ing for treadw ear,
tract ion , an d temp erature resis ta nce
Tread wear , traction and temperature grades
c::> pag e208.
M aximum Permis sibl e Inflation Pr essur e
This n umbe r is the greatest amount of air
pressure that should ever be put in the tire
under normal driving conditions .
& WARNING
- Using incorrect or unmatched tires and/
or whee ls or improper tire and whee l
combinations can lead to loss of contro l,
collision and serious personal injury.
- Always use tires, rims and wheel bo lts
that meet the specifications of orig inal
factory-installed tires or other combina­
t ions that have been spec ifically ap­
proved by the vehicle manufacturer .
- Tires age even if they are not be ing used
and can fail suddenly, especially at high
speeds . T ires that are more than 6 years
o ld can only be used in an emergency
and then with special care and at lower
speeds.
- Never mount used ti res on you r vehicle if
yo u are not s ure of their "previous histo­
ry ." Old used tires may have been dam ­
aged even though the damage cannot be
seen that can lead to sudden tire failure
and loss of vehicle control.
- All four wheels must be fitted with radia l
t ires of the same type, size (roll ing cir­
cumference) and the same tread pattern .
Driv ing with different tires reduces veh i-
Tire s an d wheel s 207
cle handling and can lead to a loss of
contro l.
- If the spare tire is not the same as the
tires that are mounted on the vehicle -
for examp le w ith winter t ires -only use
the spare t i re for a short period of time
and drive with extra care . Refit the nor ­
mal road wheel as soon as safely poss i­
ble .
- Never drive faster than the max imum
speed for which the tires on your vehicle
are rated because tires that are dr iven
faster than their rated speed can fa il
suddenly.
- Ove rloading tires cause heat build-up,
sudden tire fa ilure, including a blowout
and sudden deflation and loss of contro l.
- Temperature grades apply to tires tha t
are properly infla ted and not over or un­
derinf lated .
- For technical reasons it is not always
possible to use whee ls from other vehi­
cles -in some cases not even wheels
from the same ve hicle mode l.
-If you install wheel trim discs on the ve ­
hicle wheels, make sure that the air flow
to the brakes is not b locked. Reduced air­
f low to the brakes can them to overheat,
increas ing stopping d istances and caus­
ing a co llision .
- Run flat tires may only be used on vehi­
cles that were equ ipped w ith them at the
factory. The veh icle must have a chassis
des igned for run flat ti res and a factory­
installed t ire p ressure monito ring sys­
tem that indicates a loss of ti re p ressu re.
I nco rrec t use of run fl at tires can lead to
veh icle damage o r accidents. Check with
an authorized Audi dealer or tire special­ ist to see if your vehicle can be equipped
with run flat tires. If run flat tires are used, they must be installed on all four
wheels. Mixing tire types is not permit-
ted .
Ill>
•
•

246 Index
Auto Safety Hotline ............ .... . 105
Average fuel mileage ........... .. .... 20
Average speed . . . . . . . . . . . . . . . . . . . . . . . 20
Avoid damaging the vehicle ...... .... . 158
B
Battery . . . . . . . . . . . . . . . . . . . . . . 188, 191
Charging . .. ............. .. .. .. .. . 192
Check ing battery acid level ..... .... . 191
Connecting ............... ... .... . 188
Disconnecting ............... .... . 188
Important warnings when working on
the battery .................. .... .
190
Low . .. .. .. ............. .. .. .. ... 155
Replacing the battery .............. 189
State of charge . . . . . . . . . . . . . . . . . . . . 155
W inter operation ............... ... 188
Working on the battery ............. 190
Battery voltage ................ .... .. 33
Before driving .............. ... .... . .
Blended gasoline ..... ..... .. .. .. .. .
Body cavity sealing
Booster seats
Brake fluid 98
174
168
143
Changing the brake fluid ....... .. ... 188
Checking the brake fluid level .... .... 187
What is the correct brake flu id level? .. 187
What should I do if the brake fluid warn-
ing light comes on? ................
187
Brake fluid reservoir ......... ... .. .. . 187
Brake system ............... ... .... . 187
Anti-lock brake system ............. . 17
Brake Assistant .......... .. .. .... . 153
Brake fluid .................. ..... 187
Brake fluid spec ificat ions for refill and re-
placement .... .. ... ..... .. .. .. .. .
188
Brake light defective ................ 33
Brake pads .............. .... .... . 157
General information ............... 151
How does the moisture or road sa lt affect
the brakes? ............... ... .... .
151
Malfunction .............. ... .... . . 30
Warning/indicator lights ..... .. .. .. . . 16
Worn brake pads symbol ... .. .. .... .. 32
Break-in period .............. .. .... . 157
Brake pads ............... ... .... . 157
Tires .... .. ................ ..... . 157
Bulbs ..... ..... .. ............. .... 230
C
Cal iforn ia Proposition 65 Warn ing . ... .
Battery specific . ................. .
Capacities .. .. .. .. .. ...... ..... .. . . 179
191
239
Car care ... ..... .. ............. .... 162
Interior ..... .. .. ................. 168
Plastic and vinyl ................... 166
Weatherstrips 167
Care of exterior .... ................ . 162
Cargo area
refer to Luggage compartment ....... 103
Catalytic converter .................. 158
CD changer ..... .. .................. 73
Certification . . . . . . . . . . . . . . . . . . . . . . . 244
Changing a flat tire .................. 222
Changing engine oil ............... .. 184
Chassis
Undercoating .. .. ... .... ...... .. ..
168
also refer to Audi magnetic r ide .. .. .. . 86
Checking
Battery acid level .................. 191
Engine coolant level ................ 185
Checking tire pressure .............. . 200
Child restraint
Danger of using child restraints in the
front seat . ................... ....
116
Child restraints
Where can I get additional information
about child restraints and the ir use? ..
147
Child safety . ....................... 136
Convertible locking retractor ......... 144
Important safety instructions for using
ch ild safety seats .... .... ...... .. ..
139
Important things to know when driving
with children .....................
136
Child safety seat .................... 141
Convertible locking retractor . .. ..... . 144
Installing ... .. .. ....... ...... .. .. 144
Child safety seats
Booster seats . . . . . . . . . . . . . . . . . . . . .
143
Convertible child seats ............. 142
How do I properly install a child safety
· h' l ? 139 seat in my ve 1c e ...... ........... .