2011 AUDI TT ROADSTER battery

156 Intelligent technology
If starting capability is jeopa rdized due to en­
ergy consumption, a message appears in the
driver information disp lay.
You have to start the engine to charge the
battery.
With the engine running
A lthough electrical energy is generated when
the vehicle is being driven, the battery can be­
come discharged. This happens most ly when
little energy is being generated and a great
deal consumed and the battery's state o f
charge is not optima l.
To bring the energy balance back into equili­
brium, consumers which require especially
l arge amounts of energy are temporarily cut
back or switched off. Heating systems in par­
ticular require a great dea l of energy. If you
notice, for example, that the heated seats* or
the heated rear window are not heating, they
have been temporar ily cut back or switched
off. These systems will be ava ilable again as
soon as the energy balance has been restored.
You will also notice that engine idle speed has been increased slightly . This is normal and not
a cause for concern . By increas ing engine idle
speed the add itiona l energy required is gener­
ated and the battery is charged.
Driver notification in the instrument
cluster display
If battery power drops into the range where it
can limit the ability of the engine to start, th is
is shown in the instrument cluster display
with the following driver message:
(•) Low battery charge : battery will be
charged while driving
This notification reminds you that the starting
capability of the engine may be limited. As
soon as you start driving again, the battery
will be recharged and the notification will go
out.
Driver notification appears and goes out
again
If this driver notification appears after the ig­
nition is turned on or whi le driving and it goes
out again after a while, the battery has been
adequately recharged.
Driver notification appears and does not
go out again
If this driver notif ication appears after the ig­
nition is turned on or while driving and does
not go out again, the battery 's state of charge
is not in the optimal range. Starting ability is
restricted . Have the battery checked as soon
as possible by an autho rized Aud i dea le r o r
qualified wo rkshop.

-Apply the parking brake.
- Move selector lever to "P" (Park).
- Always let the engine cool down. Hot
components will burn skin on contact.
- To reduce the risk of being burned, never
open the hood if you see or hear steam
or coolant escaping from the engine
compartment. Wa it until no steam or
coolant can be seen or heard before care­
fully opening the hood.
- Keep children away from the engine com­
partment .
- Never spill fluids on hot engine compo­
nents. They can cause a fire.
- Never touch the radiator fan. The auxili­
ary electric fan is temperature controlled
and can switch on suddenly.
- Never open the coolant reservoir cap
when the engine is still warm. The cool­
ant system is pressurized and hot cool­
ant could spray out .
- Protect your face, hands and arm from
steam or hot engine coolant by placing a
thick rag over the cap when you open the
coolant reservoir .
- If work on the fuel system or the electri­
cal system is necessary:
- Always disconnect the battery.
- Never smoke or work near heaters or
open flames. Fluids in the engine com­
partment could start a fire.
- Keep an approved fire extinguisher im­
mediately available.
- To avoid electrical shock and personal in­
jury while the engine is running or being
started, never touch:
- Ignition cables
- Other components of the high voltage
electronic ignition system.
-If you must perform a check or repair
with the engine running:
- First, fully apply the parking brake,
move selector lever to "P" (Park).
Checking and filling 179
-Always use extreme caution to prevent
clothing, jewelry, or long hair from get­
ting caught in the radiator fan, V-belts
or other moving parts, or from contact­ ing hot parts . Tie back hair before
starting, and wear no clothing that will
hang or droop into the engine.
- Minimize exposure to emission and
chemical hazards
9 .&, .
&_ WARNING
California Proposition 65 Warning:
- Engine exhaust, some of its constituents,
and certain vehicle components contain
or emit chemicals known to the State of
California to cause cancer and birth de­
fects and reproductive harm. In addition,
certain fluids contained in vehicles and
certain products of component wear con­
tain or emit chemicals known to the
State of California to cause cancer and birth defects or other reproductive harm.
- 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 harms. Wash hands after handling .
(D Note
When adding fluids, always make sure that
they are poured into the proper container
or filler opening, otherwise serious dam­
age to vehicle systems will occur.
@ For the sake of the environment
To detect leaks in time, inspect the vehicle
floor pan from underneath regularly . If
you see spots from oil or other vehicle flu­
ids, have your vehicle inspected by an au­
thorized Audi dealer. •
•

188 Checking and filling
If the brake fluid level falls considerably be ­
l ow the "MIN" mark, the brake warning/indi­
cator light (U .S . mode ls: . , Canadian
models: .) will come on
¢ page 16 and
¢ page 30. Do not continue to operate the ve­
h icle . The complete brake system shou ld be
thoroughly checked by an authorized A ud i
dea ler o r othe r qualified facility and t he cause
corrected. If the bra ke fluid level is too low,
the bra ke warning/ind ic a tor ligh t will illum i­
nate . Contact an authorized Aud i dea ler
im­
mediatel y.
Changing brake fluid
Hove the broke fluid changed by on experi­
enced technician.
B rake fl uid abso rbs mois ture from the a ir. If
the water content in the b ra ke fluid i s too
h igh, corros ion in the brake sys tem may result
after a period of t ime . The boi ling point o f the
b rake fluid wi ll also decrease considerab ly and
decrease braking per formance.
T herefore, the brake flu id mus t be changed
every two year s. Always use new b rake fluid
which conforms to Fede ral Motor Vehicle
Standard "FMVSS 116 DOT 4".
T he brake flu id rese rvoi r can be difficul t to
reach, therefo re, we recommend that yo u
have the brake f luid changed by yo ur autho r­
ized
Audi dealer . Your dealer has the correct
too ls, the right b rake f luid and the know-how
to do this for you.
A WARNING
- B rake fluid is poiso nous . It mus t be stor­
ed only in th e closed orig inal con tainer
o ut of the reac h of children!
- Brake fa ilure can result from old o r inap ­
propriate b ra ke fluid. Observe these pre­
c aut ions:
- Use o nly brake fluid t hat meets SAE
specif ication
J 1703 and confo rms to
Federal Motor Vehicle Standard 116.
Always check with your a uthorized Audi
dealer to make s ure you are using the
correct brake fl uid. T he correct type of brake flu
id is also ind icate d on the
brake f lu id rese rvoir.
- The brake fl uid must be new . Heavy use
of the brakes can cause a vapo r lock if
the brake fluid is left in the system too
long . This can se riously affect the effi ­
c iency of t he brakes as well as your
safe ty. This co uld resu lt in a n accide nt.
([) Note
Brake fluid will damage the paint of your
vehicle.
@ For the sake of the environment
Because o f the prob lem of prope r disposal
of brake fluid as well as t he spec ial too ls
required and the necessary expertise, we
recomme nd t hat yo u have th e brake flu id
cha nged by yo ur autho rize d Au di dea le r.
Battery
General information
Your ve hicl e is equipped with a specia l bat ­
tery, an
ACM battery. This battery is located
in t he luggage compartment and must be re­
placed with an origina l equipment battery.
U nder normal opera ting condit ions, the bat­
te ry is
maintenance-fr ee .
Have the battery checked when you take your
vehicle in for se rv ice . You a re well advised to
replace a battery that is o lde r th an 5 years .
Disconnecting the battery terminals
Some vehicle functions (power window reg u­
lators, for example) are lost if the battery te r­
mina ls are disconnected. T hese functions have
to be relearned after the battery termina ls are
connected aga in . T o prevent t his, t he battery
shou ld only b e disconne cted from the ve hicle
ele ct ric al sy stem w hen abso lutely ne cessary
f o r rep air s.
Vehicles not driven for long periods
If you are go ing to let your vehicle stand for a
long time a nd not drive it, you should remem­
ber there are elect rical components which a re
Ill-

still functioning and they will draw energy
from the battery and drain it, for example, the
engine immobilizer . To prevent this, you can
e ither charge the battery occasionally to keep
it in good working condi tion or you can d is­
connect the negat ive cable on the battery .
Winter ope ration
During the winter months, battery capacity
tends to decrease as temperatures drop . This
is because more power is also consumed while
start ing, and the headlights, rear window de­
fogger, etc ., are used more often .
Avoid unnecessary power consumption, par­
ticularly in c ity traffic or when traveling on ly
short distances. Let your authori zed Audi
dealer check the capacity of the vehicle bat ­
tery before winter sets in
¢ page 192. A well
charged battery w ill not only prevent starting
p rob lems when the weathe r is cold, but will
a lso last longer .
Replacing b attery
The new battery m ust have the same capaci ­
ty, voltage (12 volts), amperage, construction
a n d p lug sealing, as the origina l batte ry. Spec­
ifications are listed on the batte ry housing.
Batteries specially developed by A udi f ulfill
the ma intenance, output, and safety require ­
ments.
When insta lling the bat tery , make sure the ig­
n ition and all e lectr ica l cons umers are sw itch­
ed
off ¢ (j) .
We recommend that you use ma intenance­
free or
cy cle-re sis tant /le ak -proof batteries
according to the standards TL 825 06 (from
December 1997) and VW 7 SO 73 (from Au ­
gust 200 1).
Replacing the battery should be ca rried by a
qua lified workshop. Please follow the instruc­
tions on the battery cover.
(D Note
- All work on t he battery requires techni­
ca l knowledge. Please contact an A udi
dealership or anothe r authorized facili ty
Checkin g and fillin g 189
for questions abo ut the batte ry - danger
of acid burns and exp losion hazard!
- T he battery must not be opened! Do not
try to change the battery's liquid level,
otherwise detonating gas will escape
from the battery - explosion hazard!
- The AGM battery in the luggage com­
partment cannot leak, because the elec ­
tro lyte for this battery is absorbed into a
special glass mat. This leak-proof battery
must not be replace with a convent iona l
battery.
- Make sure the ventilation hose on the
side of the battery is connected, other­
w ise fumes or battery ac id can leak out.
- Battery holder and terminals always
have to be secured correctly.
- Before all work on the battery follow the
warnings below ¢.&. in Working on the
battery on page 190.
@) For the sake of the environment
Because of the prob lem of proper disposal
of a battery, we recommend your author ­
ized Audi dealer change the battery for
you. Batteries contain sulfur ic acid and
l ead and must always be disposed of prop­
erly in compl iance with a ll environmental
regulat ions. Disposing of vehi cle batter ies
improperly is very dangerous to the envi ­
ronment. Make sure that the removed bat­
tery cannot overbalance, otherwise sulfu­ ric acid might escape!
(D Tips
If your vehicle is left standing for several
weeks at extremely low temperatures, the
vehicle battery shou ld be removed and
stored where it w ill not freeze. This will
prevent it from be ing damaged and having
to be replaced . •
•

190 Checking and filling
Working on the battery
Be especially careful when working on or near
the battery!
Fig . 14 3 Luggage compartment: AGM battery
The battery is loca ted in the luggage compart­
ment.
~ Swing up the luggage compartment floor.
The positive( +) battery terminal is p rotected
by a plast ic cover . This cover must be removed
to access the positive( +) termina l when con­
necting jumper cables to start the eng ine .
Always heed the
safe ty war nings, when work­
ing on the vehicle battery or the vehicle elec­
tr ica l system to prevent injury .
The following WARN INGS are ver y
import ant when w orking on the battery:
Alw ays heed t he follow ing W ARNING SYM ·
BOLS a nd safety precautions wh en working
on th e bat tery.
® Always wear eye protection .
I).. Battery acid contain s sulfuric acid. Al ­
~ ways wear gl oves a nd e ye prot ecti on.
I/£ No
\l:!S' -spar ks
• flames
- smoking.
When a batter y is ch arged , it pr odu ce s
h y d rogen g as which i s ex plosi ve and
could cau se personal injury.
----Always keep the battery well out of
re ach of children .
®
.&_ WARNING
Whenever working on the battery or on
the elect rical system, there is the risk of
i njury, accident and even fire. Read and
heed the fo llowing WARNINGS:
-Always wear eye protection. Do not let battery ac id or any lead particles get on
your skin o r clothing. Shield your eyes.
E xp losive gases can cause blindness or
o ther inju ry.
- Ba ttery acid conta ins sulfuric acid. Sulfu­
ric acid can ca use blindness and severe
burns .
- Always wear gloves and eye protection.
Do not tilt the battery because acid
could leak out of the ventilat ion open ­
ings .
- If you get battery acid in your eyes or
on your skin, immediately rinse w ith
cold water for several minutes and get
medica 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 . Th is 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 explos ive and
could cause pe rsonal in ju ry.
- Always keep the battery well out of the
reac h of children.
- Before work is done on the electrical sys­
tem, disconnect the negat ive g round ca­
b le.
- Before performing any work on the e lec­
tr ica l system, switch off the engine and
ignit ion as well as any elec trical equip­
ment. The negative cable on the bat tery

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 frozen 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 oc).
-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.
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.
CD 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 and filling 191
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. 144 Luggage compartment: Battery With magic
eye.
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
c::> &_ in
Working on the battery on page 190
.. Read the acid level from the window on the
battery
c:> fig. 144.
Air bubbles in the window can cause an inac­
curate reading . Carefully tap on the side of
the window.
- If the window is
green, the battery acid level
is correct.
- If the window has no color or is bright yel­
low ,
the battery acid level is too low . Have
the battery tested by your authorized Audi
dealer or a qualified workshop.
- If the window is
black , then the battery is
insufficiently charged . Recharge the battery
as soon as possible
r:::, page 192 .
CD Note
Do not overfill the battery, otherwise bat­
tery acid will overflow through the vent
opening. This can damage the paint and
cause corrosion .

192 Checking and filling
Charging of battery
Starting the engine requires a well charged battery.
,. Always read and heed all W ARNIN GS be­
low
c> A and c> A in Working on the bat­
tery on page 190.
,. Switch off the ignitio n and all electrical con­
s u mers.
,. Make sure the area is well vent ilated when
yo u charge the battery.
,. Connect charger cables.
ALWAY S co nnect
ch arg er ca ble s PO SITIV E
G) to POSITIVE
G) ; NE GATI VE Q to NEGATI VE Q .
,. Switch on the charger.
,. Make sure the charging rate is not over
6 amps.
,. Turn off the charger¢.&_.
,. Disconnect the charger cables .
,. Connect both battery cables to the battery if
necessary-
first plus, then m inus.
It is not necessary to remove the battery from
the luggage compartment, and it is also not
necessa ry to disconnect the cables.
Normally, a battery should be charged at no
more than 10 percent of its rated capacity.
For example, a charging current of 4.5 amps
wou ld be used on a battery rated at 45 Ah.
Rated capacity of the battery in your veh icle is
listed on the battery housing .
The battery caps should
not be opened when
charging a battery.
&,. WARNING
-
Charging a battery can be dangerous.
- Never charge a frozen battery . It may ex­
plode because of gas trapped in the ice.
Allow a frozen battery to thaw out first.
- Do not reuse batteries which were fro­
zen. The battery housing may have
c racked and weakened whe n the battery
froze.
- Charge the battery in a we ll ventilated
area . Keep away from open f lame o r elec­
t ric al spa rk . Do not smoke. Hydrogen gas
gene rate d by the b attery is exp losive. -
To reduce the danger of explosion, never
connect or d isconnect charger cab les
while the charger is operating .
- Fast charging a battery is dangerous and
should only be attempted by a compe­
tent tech nician with the proper equip­
ment .
- Battery acid that may spill during charg­
ing should be washed off with a solution
of wa rm water and bak ing soda to neu­
tralize th e ac id .
(D Note
Never use a fast charger as a booster to
start the eng ine . Th is w ill seriously dam­
age sensit ive electronic components, such
as cont ro l units, re lays, radio, etc., as well
as the battery charger.
{1) Tips
The vehicle batte ry must not be charged
with a standa rd small charger that p lugs
i nto the cigarette lig hter or outlet.
Windshield/head Light
washer container
Fig . 14 5 Fender, left: Windshie ld washer fluid reser·
vo ir
T he washer fluid container is marked with the
symbol
O on its cap.
,. Before you check any thing in the engine
compa rtme nt,
a lwa ys read and heed all
WARNINGS ¢
A in Working in the engine
compartment on page 178 .
,. Lift the filler cap tongue to add washer flu-
id. You can fill the container to the top.
111>

196 Tires and wheels
Maximum loaded vehicle weight
means the sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity we ight, and
(d) Production options weight
Maximum (permissible) inflation pressure
means the maximum cold inflation pressu re
to which a tire may be inflated. Also called
"maximum inflation p ressure."
Normal occupant weight
means 150 lbs. (68 kilograms) times the
number of occupants seated in the vehicle up
to the total seating capacity of your vehicle.
Occupant distribution means distribution of occupants in a vehicle .
Outer diameter means the overa ll diameter of an inf lated new
tire.
Overall width
means the linear distance between the exteri­
ors of the sidewalls of an inflated tire, includ­
ing e levations due to labeling, decorations, or
protective bands or ribs.
Ply
means a laye r of rubber-coated parallel cords.
Production options weight
means the comb ined we ight of those installed
regular production options weighing over 5
lbs . (2 .3 kg) in excess of those standard items
which they replace, not previously considered
in curb weight or accessory weight, including
heavy duty brakes, r ide leve lers, heavy duty
battery, and special trim.
Radial ply tire
means a pneumatic tir e in which the p ly cords
that extend to the beads are laid at substan­
tially 90 degrees to the centerline of the
tread . Recommended inflation pressure
see
~
page 195, Cold tire inflation pressure.
Reinforced tire
means a t ire designed to operate at higher
loads and at higher inflation p ressures than
the corresponding standard tire. Reinforced
ti res my be ident ified as "XL" "xl" "E XTRA
, ,
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 d iameter of the bead seat. If
you change your wheel s ize, you w ill have to
purchase new tires to match the new r im di­
ameter .
Rim size designation
means rim diameter and width.
Rim width
means nominal distance between rim flanges .
Sidewall
means that portion of a tire between the
tread and bead.
Speed rating (letter code)
means the speed at which a tire is designed to
be driven for extended periods of time. The
r atings range from 93 mph (150 km/h) to
186 mph (298 km/h)
~ page 206 . You may
not find this information on all tires because
it is not requ ired by law.
T he speed rating letter code, where applica­
ble, is molded on the tire sidewall and indi­
cates the maximum perm iss ibl e road speeds
~ A in Winter tires on page 209 .
Tire pressure monitoring system
means a system that detects when one or
more of a veh icle's tires are underinflated and
i lluminates a low tire pressure warning tell-
tale. ..,_