2015 AUDI TT ROADSTER Owners Manual

@ For the sake of the environment
Because of the problem of proper disposa l
of brake flu id as we ll as the special tools
requ ired and the necessary expert ise, we
recommend that you have the brake fluid
changed by your author ized Audi dealer .
Battery
General information
Your vehicle is equipped with a special bat­
tery, an
ACM battery. This battery is located
in the luggage compartment and must be re­
p laced w ith an original equipment battery .
Under normal operati ng conditions, the bat­
tery is
maint enan ce -fre e.
Have the battery checked when you take your
ve hicle in for service. You are well adv ised to
replace a battery that is older than
5 years.
Di sconn ect ing the battery terminal s
Some vehicle functions (power window regu­
lators, for example) are lost if the battery ter­
minals are d isconnected. These functions have
to be re learned after the battery terminals are
connected again . To prevent this, the battery
should only be d isconnected from the vehicle
e lectr ica l system when absolutely necessary
for repairs .
Vehicles not driven for l ong period s
If you do not drive your vehicle over a period
of several days or weeks, electrical compo ­
nents are gradually cut back o r switched off .
This reduces energy consumption and main­
tains sta rting capab ility over a longer per iod
c::> page 146. Some of the convenience func­
tions may not operate, s uch as the interior
lights or power seat adjustment. The conven ­
ience functions will be avai lab le again when
you switch on the ignition and start the en­ g ine.
Winter operation
D uring the winter months, ba tte ry capaci ty
tends to decrease as temperatures d rop. This
is because more powe r is also consumed while
Checkin g and fillin g 175
starting, and the headlights, rear window de ­
fogger, etc ., are used more often .
Avoid unnecess ary powe r consumpt io n, p ar­
t icu lar ly in city traffic o r when traveling only
sho rt distances. Let your authorized A udi
dealer check the capacity of the vehicle bat­
tery before winter sets in
c::> page 178. A well
charged battery will not on ly prevent starting
problems when the weather is cold, but will
also last longer .
Replacing battery
The new battery must ha ve the same capaci ­
ty, voltage (12 volts), amperage, construction
and plug sea ling, as the original battery. Spec­
ifications are listed o n the battery housing.
Batter ies spec ia lly developed by Audi fulfill
the maintenance, outp ut, and safety require­
ments.
When installing the battery, make sure the ig­ nition and a ll electrical consumers are switch ­
ed off
c::> (D .
We recommend that you use maintenance­
free or
cycle -res istant /leak-proof batter ies
accord ing to the standards TL 825 06 (from
Apr il 2008) and VW 7 50 73 (from Ap ril
2010).
Rep lacing the battery should be carried by a
qualified workshop. Please fo llow the instruc ­
tions on the battery cover.
([) Note
-All work on the battery requ ires techn i­
cal know ledge. P lease contact an Audi
deale rship o r anot her au tho rized fac ility
for questions abo ut the batte ry -dang er
of a cid b urns and exp losion ha zard!
- T he battery must not be opened! Do not
try to cha nge the battery 's liquid level,
ot herwise de tona ting gas will esc ape
from the ba ttery -explosion ha zard!
- T he AGM battery in the l uggage com­
p artment cannot leak, because the elec­
tro lyte for this battery is abso rbed into a
special glass mat. This lea k-p roof battery
Iii>
•
•

176 Check ing and filling
must not be replace with a conventional
battery .
- Make sure the ventilat ion hose on the
side of the battery is connected, other­
wise fumes or battery acid can leak out.
- Battery ho lder and terminals a lways
have to be secured cor rectly.
- Befo re a ll work on the battery fo llow the
warning s below c::, & in Working on the
battery on page 176.
@ For the sake of the environment
Because of the problem of proper d isposa l
of a battery, we recommend your author ­
ized Au di dealer change the battery for
you. Batter ies contain su lf u ric ac id and
lead and m ust always be disposed of prop­
erly in compliance w ith all environmental
regulations . D isposing of vehicle batteries
improperly is very dangerous to the envi­
ronment. Make sure that the removed bat­
t ery cannot overbalan ce, o therw ise sulfu­
r ic acid mig ht escape!
Q Tips
If you r vehicle is left standing for severa l
weeks at extremely low tempe rat ures, t he
veh icle b attery should be remove d and
sto red whe re it will not freeze . This w ill
prevent it from being damage d and hav ing
to be replaced .
Working on the battery
Be especially careful when working on or near
the battery!
T he ba tte ry is loca ted in the luggage compart ­
men t under the floor . Before yo u work on or
near the battery,
read and heed all WARN­
INGS
c::, ,& .
Always heed the sa fet y warning s, when wor k­
ing on the vehicle battery o r the ve hicle elec ­
trica l system to preve nt injury.
The following WARNINGS are very
i mportant when working on the battery :
Alway s heed the followin g WARNING SYM·
BOLS and safety precaution s when working
on the battery.
®
Always wear eye protection .
~
Battery acid contains sulfuric acid . Al-
ways w ear glov es and eye prot ection.
@
No
- spa rks
- flames
- smo king.
~
When a batter y is charged, it produ ce s
hydrogen gas which is ex plosive and
could cau se pe rsonal injury.
®
Always keep the batt ery well out of
reach of childr en.
& WARNING ~ -
Wheneve r working on t he battery o r on
the electrical system, there is t he risk of
injury, accident and even fire . Read and
heed the following WARNINGS:
- Always wear eye protection. Do not let
battery ac id or any lead particles get on
your skin or clothing. Shield you r eyes.
Exp losive gases can cause blindness or
other injury.
- Battery acid conta ins sulfuric acid. Sulfu­
ric acid can ca use blindness and severe
burns.
- Always wear g loves and eye prote ction.
Do no t tilt the ba ttery because acid
could leak out of the ventilation open ­
ings .
- If you get battery ac id in your eyes or
on your skin, immediately rinse with
cold water for several minutes and get
med ica l attent ion.
- If you shou ld ingest any battery acid,
seek medical attention immediately .
- Do not expose the battery to an open
flame, e lectr ic sparks or an open light.
- Do not smoke .

-Do not interchange the positive and neg­
ative cables .
- When working on the battery , be sure
not to short-circuit the terminals with
tools or other metal objects. This would cause the battery to heat up very quickly,
which could lead to damage or explosion and personal injury.
- When a battery is charged, it produces
hydrogen gas which is explosive and
could cause personal injury .
- Always keep the battery well out of the reach of children .
- Before work is done on the electrical sys­
tem, disconnect the negative ground ca ­
ble .
- Before performing any work on the elec ­
trical system , switch off the engine and
ignition as well as any electrical equip­
ment. The negative cable on the battery
must be disconnected. If you are just go­
ing to replace a light bulb, then it is
enough to switch off the lights.
- Before disconnecting the battery , switch
off the anti-theft alarm system! Other­
wise you will set off the alarm.
- When disconnecting the battery, first
disconnect the negative cable and then
the positive cable.
- Before reconnecting the battery, make
sure all electrical consumers are switch­
ed off. Reconnect the positive cable first
and then the negative cable. Never inter­
change the cables - this could start a fire!
- Never charge a fro zen or a thawed-out
battery. It could explode! If a battery has
frozen, then it must be replaced. A dis­
charged battery can freeze over at 32 °F
(0 °C) .
-Make sure the vent hose is always attach­
ed to the opening on the side of the bat ­
tery.
- Never use batteries which are damaged.
Danger of explosion! Always replace a
damaged battery.
Checking and filling 177
A WARNING
California Proposition 65 Warning:
- Battery posts, terminals and related ac­ cessories contain lead and lead com­
pounds, chemicals known to the State of
California to cause cancer and reproduc ­
tive problems . Wash hands after han­
dling.
Q) Note
- Do not disconnect the vehicle battery
when the ignition is switched on or when
the engine is running, otherwise , you will
damage electronic components in the
electrical system.
- If your vehicle is going to stand for a
long period of time without being driven,
protect the battery from "freezing", oth­
erwise it will be damaged and will then
have to be replaced.
Checking the battery acid level on magic
eye batteries*
The battery acid level in the battery can be
checked through the clear inspection window .
Fig. 134 Lugg age compar tme nt: Battery w ith mag ic
e ye .
On top of the battery, there is a round "win­
dow". This window (magic eye) changes color
as the battery charge and acid level change.
.,. Read and heed all WARNINGS
~.&_ in
Working on the battery on page 176
.. Read the acid level from the window on the
battery ~
fig. 134. Ill>-

178 Checking and filling
Ai r bubbles in the window can cause an inac­
curate reading. Carefully tap on the side of
the w indow.
- If the window is gr ee n, the battery ac id leve l
is correct.
- If the window has no c olo r or is brigh t yel­
low ,
the battery acid leve l is too low . Have
the battery tested by your authorized A udi
dealer or a qualified workshop .
- If the window is
black , then the batte ry is
insufficiently charged. Recharge the battery
as soon as possible ¢
page 178.
@ Note
Do not overfill the battery, otherwise bat­
tery acid will overflow through the vent
opening. This can damage the paint and
cause corros ion.
Charging of battery
Starting the engine requires a well charged
battery.
• Alw ay s rea d and heed all WARNING S be­
low ¢
A and ¢ A in Working on the bat­
tery on page 176.
• Switch off the ignit ion and all electrical con­
sumers.
• Make sure the area is well vent ilated when
you charge the battery .
• Connect charger cables.
ALW AYS conn ect
c harg er cab les POSITIVE
G) to POSITIVE
G) ; NEGATIVE Qto NEGATIVE Q.
• Switch on the charger .
•T urnoff the charger ¢,& .
• Disconnect the charger cables.
• Connect both battery cables to the battery if
necessary-
first plus, then m inus.
When charging at
low voltages (e.g . with a
tri ckle char ger), the battery cables do not
have to be d isconnected first. Before charging
at
high voltages, i.e. "fa st charg ing ", you
must disconnect both cables. In e ither case,
follow the instruct ions from the manufacturer
of the charger. Fastcharging a battery is
dangerou
s ¢.&. in
Working on the battery on page 176 .
It re­
quires special charging equipment and the
knowledge to go with it. We recommend hav­
ing your battery fast charged only by a quali­
fied workshop .
A d ischarged battery can
freeze at tempera ­
tures of only
32 °F (0 °C). Allow a frozen bat­
tery to thaw completely before attempting to
charge it¢,&.. However, we recommend not
us ing a thawed battery aga in because the bat­
tery casing can be cracked due to ice fo rma­
t ion and can leak battery acid.
Do not open the battery caps when charging
the battery .
A WARNING ,..__ -
Charging a battery can be dangerous.
- Never charge a frozen battery . It may ex­
p lode because of gas trapped in the ice .
Allow a frozen battery to thaw out first.
- Do not reuse batteries wh ich were fro­
zen. The battery hous ing may have
cracked and weakened when the battery
fro ze.
- Cha rge t he battery in a well venti lated
area. Keep away from open flame or elec­
tr ica l spar k. Do not smo ke. Hyd rogen gas
genera ted by the battery is explos ive .
- To reduce the danger of explosion, never
connect or d isconnect charger cab les
while the charger is operating.
- Fast charging a ba ttery is dange rous and
should only be at tempted by a compe­
tent technician with the proper equip­
ment.
- Battery acid tha t may sp ill dur ing cha rg ­
ing should be washed off with a solution
of warm water and baking soda to neu­
tralize the ac id.
(D Note
Neve r use a fast charger as a booster to
start the engine. This wi ll seriously dam­
age sensit ive e lectronic components, such
as contro l units, re lays, radio, etc., as well
as the battery charger.

@ Tips
The vehicle battery must not be charged
with a standard small charger that plugs
into the cigarette lighter or out let.
Windshield/headlight
washer container
F ig . 135 Fen der, left: c over on th e win ds hield and
h ead lig ht· washe r fl uid reservoi r
The washer flu id container is marked with the
symbol
Q on its cap Qpage 166, fig. 128 .
• Before you check anyth ing in the engine
compartment,
always r ea d and h eed all
WARNING S Q .&. in Working in the engine
compartment on page 164 .
• Lift the filler cap tongue to add washer flu­
id. You can fill the container to the top.
• Press the cap back onto the filler neck after
filling the containe r.
You can f ind the rese rvoir
ca paci ty in the tab le
in
~ page 223.
Clean water should be used when fill ing up . If
possib le, use soft water to prevent sca ling on
the washer jets. Always add a glass cleaner solu tion (with fros t protection in the w inter) .
(D Note
-Do not mix engine coolant antifreeze or
any other addi tives to fill up the wind­
s hi eld washer reservo ir.
- Do not use glass cleane rs contain ing
paint solvent; you r isk damaging the
pain t.
Checkin g and fillin g 179

180 Tire s and wheel s
Tires and wheels
Tires
General notes
Tires may be the least appreciated and most
abused parts of a motor vehicle .
Tires may be the least appreciated and most
abused parts of a motor vehicle . Tires are,
however, one of the most important parts of a
vehicle, particularly considering the compara­
tive ly small patch of rubber on each tire that
assures that a ll-impo rtant contact between
you, your vehicle and the road.
Maintaining the correct tire pressure, mak ing
sure that your vehicle and its tires do not have
to carry mo re weight than they can safe ly han­
d le, avoiding damage from road hazards and
reg ularly inspecting t ires for damage includ­
ing cuts, slashes irregu la r wear and ove rall
condition are the most important things that
you can do to he lp avoid sudden tire failure in­
cluding tread separation and blowouts.
Avoiding damage I f you have to drive over a curb or similar ob­
stacle, drive very s low ly and as close as possi ­
b le at a right angle to the curb.
A lways keep chem ica ls includ ing gre ase, o il,
gasoline and b rake fluid off the ti res .
Inspect the t ires regularly for damage (cuts,
cracks or b listers, etc.). Remove any fo reign
bod ies embedded in the treads.
Storing tires Mark tires when you remove them to indicate
the direction of rotation . Th is ensures you to
be ab le to mount them correctly when you re­
install t hem.
When removed, the whee ls or t ires should be
stored in a cool, d ry and preferably dark place .
Store tires in a vertical pos ition if they are not
mounted on rims, in a horizontal pos it ion if
they are mounted on rims. New tire
s
New t ires have to be broken in¢&,. .
T he tread depth of new t ires may vary, accord­
ing to the type a nd make of t ire and the tread
pa tte rn .
Hidden damage
Damage to tires and r ims is ofte n not readily
vis ible . If you notice unusual v ibrat ion or the
vehicle p ulls to one side, th is may ind icate
t h at one of the t ires has been damaged . Th e
t ir es m ust be checked immed iate ly by an au ­
tho rized Aud i dea le r or q uali fied wor ks hop.
Unidirectional t ires
A un idirectional tire can be identified by ar­
rows on the sid ewa ll, that po int in the direc­
t ion the t ire is desig ned to rotate. You mus t
f ol low the specified d irection of rotation . This
is necessary so that these tires can develop
their optimum characterist ics regarding grip,
road no ise, wear and hyd rop laning resistance.
For more information
¢page 211.
A WARNING
-New tires or tires that are old, worn or
damaged cannot provide maximum con­
trol and braking ability .
-
-New tires tend to be slippery and must
be broken in . To reduce the risk of losing
control, a co llision and ser ious personal
in jur ies, d rive w ith special ca re fo r the
fi rst 350 m iles (560 km).
- Driving with worn or damaged tires can
le ad to loss of control, sudden tire fail­
ure, including a blowou t and sudden de­
fl ation, c rashes and seriou s personal in­
juries . Have wo rn or damaged t ires re­
p laced immediate ly .
- T ires age even if they are not being used
an d can fai l sudden ly, especially at high
speeds. Tires that are more than 6 years
old can only be used in an emergency
and then w ith specia l care and at low
speed.

-Never mount used tires on yo ur vehicle if
yo u are not sure 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.
- If you notice unusual vibration or if the
vehicle pulls to one side when d riving, al­
ways stop as soon as it is safe to do so
and check the wheels and tires for dam­
age .
(D Note
-Please note that summer and winter
tires are designed for the cond itions that
are typ ic al in those seasons. Aud i recom­
mends using w inter t ires du ring the win-
Glossary of tire and loading terminology
Accessory weight
means the comb ined weight (in excess of
those standard items which may be replaced)
of automatic tra nsmission, power steering,
power brakes, power windows, power seats,
radio, and heater, to the extent that these
items are availab le as factory-installed equip­
ment (whether installed or not) .
Aspect ratio
means the ratio of the height to the width of
the tire in percent . Numbers of 55 or lower in­
d icate a low sidewall for improved steering re­
sponse and better overall handling on dry
pavement .
Bead
means the pa rt of the ti re that is made of
steel wires, wrapped or reinforced by ply cords
and that is shaped to fit the rim.
Bead s eparation
means a b reakdown of the bond between
components in the bead.
Cord
means the strands forming the plies in the
tire.
Tire s an d wheel s 181
ter months . Low temperatu res signifi­
cantly decrease the elastic ity of summer
t ires, which affects traction and braking
ability. If summer tires are used in very
co ld temperatures, cracks can form on
the tread bars, res ulting in permanent
ti re damage that can cause loud drivi ng
noise and unbalanced tires. Aud i is not
responsib le for this type of damage.
- Burn ished, polished or chromed rims
must not be used in winter weather. Th e
surfa ce of the rims does not have suffi­
c ien t cor rosion pro te cti on for this and
c o ul d be pe rmanen tly damaged by road
salt or similar substances. This damage
is not covered by warranty.
Cold tir e inflation pressure
me ans the t ire press ure re commended by the
vehicle manufacturer fo r a tire o f a des igna ted
size that has not bee n driven for more than a
coup le of miles (k ilomete rs) at low speeds in
the three hour pe riod before the tire press ure
is measured or adjusted.
Curb weight
means the weight o f a motor vehicle with
standard equipment including the maximum
capacity of fuel, o il, and coolant, air cond i­
tion ing and additional weight of optiona l
equipment.
E xtra load tire
means a tire designed to operate at higher
l oads and at higher inflation press ures than
the corresponding standard tire. Extra load
tires my be ident ified as "XL", "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-
ter~ces.
~
•
•

182 Tires and wheels
Gross Vehicle Weight Rating ("GVWR")
means the maximum total loaded weight o f
the vehicle.
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 inflat ion pressure. You
may not find this informat ion on all tires be­
cause it is not requ ired by law .
Maximum load rating
means the load rating for a t ire at the maxi­
mum permissible inflation pressure for that
tire .
Maximum loaded vehicle weight
means the sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity we ight, and
(d) Production opt ions weight
Maximum (permissible) inflation pressure
means the maximum cold inflation pressure
to which a tire may be inflated . Also called
"maximum inflation press ure."
Normal occupant weight
means 150 lbs. (68 kilog rams) times the
number of occupants seated in the vehicle up
to the tota l seating capacity of your vehicle.
Occupant distribution
means distribution of occupants in a veh icle.
Outer diameter
means the overall diameter of an inflated new
tire.
Overall width
means the linear distance between the exteri ­
ors of the sidewalls of an inflated tire, includ­
ing elevations due to labeling, decorations, or
protective bands or ribs .
Ply
means a layer of rubbe r-coated parallel cords.
Production options weight
means the combined weight of those installed
regular production opt ions we ighing over 5
lbs. (2.3 kg) in excess of those standa rd items
wh ich they replace, not previously considered
in curb weight or accessory weight, including
heavy duty brakes, ride levelers, heavy duty
battery, and specia l trim .
Radial ply tire
means a pneumat ic tire in which the ply cords
that extend to the beads are laid at substa n­
tially 90 deg rees to the centerline of the
tread.
Recommended inflation pressure
see <=;> page 181, Cold tire inflation pressure .
Reinforced tire
means a tire designed to operate at higher
loads and at higher inflation pressures than
the corresponding standard tire. Re inforced
t ir es my be identified as "XL", "xl", "EXTRA
LOAD", or "RF" on the sidewall.
Rim
means a metal support for a tire or a t ire and
tube assembly upon which the tire beads are
seated .
Rim diameter
means nominal diameter of the bead seat. If
you change your wheel s ize, you will have to
purchase new tires to match the new r im di­
ameter .
Rim size designation
means rim diameter and width.
Rim width
means nom inal distance between rim flanges.
Sidewall
means that portion of a t ire between the
tread and bead .