2018 AUDI TT ROADSTER ignition

Child sa fety
A WARNING
Always take specia l precautions if you must
install a forward or rearward-facing chi ld re­
straint on the front passenger's seat in excep­
tional situations:
- Whenever a forward or rearward-facing
child restraint is installed on the front pas­
senger seat, the
P ASS ENGER AIR B AG OFF
'-i; light must come on and stay on whenev­
er the ignition is sw itched on .
- If the
PASS ENGER AIR B AG O FF ~; light
does not come on and stay on, perform the
checks descr ibed
<=> page 205, Monitoring
the Advanced Airbag System.
- If the PA SSENGER AIR BAG OFF ~; light
does not come on and stay on whenever the
ignition is switched on the inflating airbag
will hit the child safety seat o r infant ca rr ier
with great force and will smash the child safety seat and child against the backrest,
center armrest, door or roof . Have the air­
bag system inspected immediately by your
Audi dealer.
- Improper installation of chi ld restraints can
red uce their effect iveness or even prevent
them from providing any protection.
- An improperly installed chi ld restraint can
interfere with the airbag as it deploys and
seriously injure or even kill the child.
- Always carefully follow the manufacturer's
instructions provided w ith the ch ild safety
seat or carrier.
- After checking to make sure that the child
restra int is properly installed, make certain
that the child restraint is correctly recog­
nized by the capac it ive passenger detection
system in the front passenger seat and that
the
PASSENGER AIR BAG OFF '-i; light sig­
nals the co rrect front passenge r frontal air­
bag status.
A WARNING
Forward-fac ing ch ild rest raints:
- Always make sure the forward-facing seat
has been designed and cert ified by its man­
ufact urer for use on a front seat with a pas­
senger front and side airbag .
226
--
Never put the forward-facing child restraint
up, against or very near the instrument pan­
el.
- Always move the passenger seat into its
rearmost posit ion in the seat's fore and aft
adjustment range, as far away from the a ir­
bag as poss ible before installing the for­
ward-facing chi ld restraint. The backrest
must be adjusted to an upr ight position.
- Make sure that the
PASSENGER AIR BAG
OFF
'-i; light comes on and stays on all the
time wheneve r the ign it ion is switched on.
A WARNING
Rearward-facing chi ld restraints:
- A child in a rearward-fac ing ch ild safety seat
installed on the front passenger seat will be
serious ly injured and can be killed if the
front airbag inflates
-even with an Ad­
vanced Airbag System.
- The inflating airbag will h it the ch ild safety
seat o r infant c arr ier with great force and
w ill smash the child safety seat and child
against the backrest, center armrest, door
or roof.
- Always be especially carefu l if you must in­
stall a rearward facing child safety seat on
the front passenger seat in exceptiona l cir­
cumstances.
- Make sure that the
PASSENGER AIR BAG
OFF
'-i; light comes on and stays on all the
time whenever the ign it ion is switched on.
- If the
PASSENGER AIR BAG OFF '-i; light
does not come on and stay on, have the air­ bag system inspected by your Audi dealer.
Activating the convertible locking retractor
Use the convertible locking retractor to secure a
child restraint.
A lways heed the c hil d safety seat manufacturer's
instructions when insta lling a child restraint in
your vehicle. To activate the convertib le locking
retractor:
.,. Place the chi ld restraint on a seat .
.,. Slowly pull the belt all the way out .

Checking and Filling
Coolant Freeze protec-
tion
additi ve
Warm min. 40% min. -13 °F
regions (- 25 °C)
max . 45%
Cold min. 50% max. -40 °F
regions (-40 °C)
max. 55%
@ Note
- Before the start of winter, have an author­ ized Audi dealer or authorized Audi Service
Facility check if the coolant additive in your
vehicle matches the percentage appropriate
for the climate. Th is is especially important
when driving in co lder climates.
- If the appropriate coolant additive is not
available in an emergency, do not add any
other additive . You cou ld damage the en­
gine.
If t his happens, only use wate r and re­
store the correct mixture ratio with the
specified coolant additive as soon as possi­
ble .
- Only refill with new coo lant.
- Radiato r sealant must not be mixed w ith
the coo lant .
Adding coolant
Fig . 183 Eng ine co mpartment : coo lant expans ion ta nk
cove r (exa mple)
Observe the safety precautions c:::> page 233 ,
Working in the engine compar tment.
Che cking the engin e coolant l evel
.. Park the vehicle on a level surface .
.. Switch the ignition off .
240
~ 0 > 00 ID
.. Read the coolant level on the coolant expansion
tank
c:::> page 236, fig. 180 . The coolant level
must be between the markings when the en­
gine in cold. When the engine is warm it can be
slightly above the upper mark ing .
Adding coo lant
Requirement : there must be a residual amount of
coolant in the expansion tank
c:::> @ .
.. Let the engine cool down.
.. Place a clot h over the coolant expansion tank
cap and unscrew the cap counterclockwise
c:::> ,A .
.. Add coo lant mixed in the correct rat io
c:::> page 239 up to the upper marking .
.. Make sure that the fluid level remains stable.
Add more coolant if necessary .
.. Close the cap securely .
Coolant loss usually ind icates there is a leak. Im­
mediate ly dr ive your vehicle to a n author ized
Audi dealer or author ized Audi Service Fac il ity
and have the cooling system inspected. If the
cooling system is not lea king , a loss can come
from the coolant boiling through overheat ing
and being pushed ou t of the cooling system .
Lil WARNING
- The cooling system is under pressure. Do
not open the coo lant expansion tank cap
when the engine is hot. This increases the risk of burns.
-The coolant additive and the coolant can be dangerous to your health. For this reason ,
keep the coolant in the original container
and away from children. There is a risk of
poisoning.
-When working in the engine compartment,
remember that the radiator fan can switch
on even if the ignition is switched
off, wh ich
increases the r is k of injury.
@ Note
Do not add coolant if the expans ion tank is
empty . A ir could enter the cooling system and
-
damage the eng ine . If this is the case, do not ..,.

Checking and Filling
A WARNING
California Proposit ion 65 Warning:
- Battery posts, terminals and related acces­ sories contain lead and lead compounds, chemicals known to the State of California
to cause cancer and reproductive problems .
Wash hands after handling .
Q) Note
If the vehicle will be parked for long periods
of t ime, protect it against the cold so that it
w ill not be destroyed by "freezing"
~page 242 .
Vehicle battery
The term "vehicle battery " refers to the 12 Volt
battery in your vehicle .
Not running the vehicle for long p eriods of
t ime
If you do not drive your vehicle for several days or
weeks, electrical equipment is gradually scaled
back or switched off . This reduces energy use and
ensures the veh icle w il l be able to sta rt after long
pe riods of time
i:::> page 91. Some convenience
functions, such as interior light ing or power sea t
adjustment, may not be available under certain
circumstances . These convenience functions will
be avai lab le again once you switch the ignition on
and start the engine.
Even when electrical equipment is switched off ,
the equipment can still drain the vehicle battery if the vehicle is not driven for long periods of
time. Deep draining results in a chemical reaction
that destroys the inside of the vehicle battery.
The vehicle battery must be charged every month to reduce the risk of this happen ing
i:::> page 242.
Contact an author ized Audi dealer or authorized
Aud i Serv ice Facility for more information.
Winter operati on
Cold weather places higher demands on the vehi­
cle battery . This results in reduced start ing abili ­
ty . Have the vehicle battery checked by an au­
thori zed Audi dealer or authorized Audi Service
Facility before the co ld time of year.
242
Charging the vehicle battery
Fig. 18 5 En g in e compartmen t: co nn ectors fo r a cha rger
a n d jum p start cab les
Requireme nt: only use chargers with a maximum
charging volt age of 30 amp s/14.8 Volts.
The
vehicle battery cables remain connected.
... Read the wa rnings i:::> ,& in General warnings
about batteries on page 241
and i:::> ,& .
... Switch off the ignition and all electrica l equip ­
ment .
... Open the hood i:::> page 235 .
... Open the red cover on the positive terminal
¢fig. 185.
... Clamp the charger terminal clamps to the jump
s ta rt pins
according to the instructions
c::> fig . 185 .
... Now insert the power cable for the cha rging de­
vice into the socket and switch the device on .
... At the end of the charging process, switch the
charger off and pull the power cable out of the
socket .
... Remove the charger terminal clamps.
... Close the red cover on the pos itive terminal.
... Close the hood i:::> page 235.
A WARNING
-A highly explosive m ixture of gases can form
when charg ing batteries . Only charge the
veh icle battery in well-ventilated areas.
-A drained vehicle battery can freeze at tem­
peratures around 32
QF (0 QC) . A frozen or
thawed vehicle battery must not be charged
and must not be used anymore. If ice forms,
the battery housing can crack and battery
electrolyte can leak out, which increases the
risk of an explosion and c hemical burns .
Contact an authorized Audi dealer or
..,_

Cl 00 .-< N r-­N .-< 0 r-­Vl 00
authorized Audi Service Facility for more in­
formation.
- Do not connect or disconnect the charging
cable while charging because this increases
the risk of an exp losion.
(D Tips
- Only charge the vehicle battery through the
connections in the engine compartment.
- Read all of the manufacturer's instructions
for the charger before charging the vehicle
battery.
Windshield washer system
Fig. 186 Engine compa rtment: washer flu id reservo ir cap
The windshield washer reservoir W contains the
cleaning solution for the windshie ld and the
headlight washer
system* ¢ page 236, fig . 180.
The reservoir capacity can be found in
¢page 288.
To reduce the risk of lime sca le deposits on the
spray nozzles, use clean water with low amounts
of calc ium. A lways add window cleaner to the wa­
ter. When the outs ide temperatures are cold, an
anti -freezing agent should be added to the water
so that it does not freeze.
@ Note
-The concentration of anti-freezing agent
must be adjusted to the vehicle operating
cond itions in the respective climate. A con­
ce ntrat ion that is too high can lead to vehi­
cl e damage.
- Never add radiator anti-freeze or other addi­
tives to the washer fluid.
Checking and Filling
- Do not use a glass cleaner that contains
paint so lvents, because t his could damage
the paint.
Service interval display
The service interval display detects when your ve ­
hicle is due for service .
The service interval display works in two stages:
-Inspection or oil change reminder : after a cer-
tain distance driven, a message appears in the
In fotainment system display each time the ig ­
nition is switched on or off. The remaining dis­
tance or time is disp layed briefly.
- Inspection or oil change due: if your vehicle
has reached an inspection or oil change interval
or both intervals at the same t ime, the mes­
sage
Inspection due! or Oil change due! or Oil
change and inspection due!
appears briefly af ­
ter switching the ignition on/off .
Checking service intervals
You can check the remaining distance or time un ­
t il the next oil change or next inspection. Se lect
in the Infotainment system: the
I MENU I button>
Vehicle > left control button > Service & checks >
Service intervals .
Resetting the indicator
An authorized Audi dea ler or authorized Audi
Service Facility w ill reset the service interval dis­
play after performing service.
If you have ch anged the oi l yourse lf, you must re ­
set the oil change interval.
T o reset the disp lay, select in the Infotainment
system: the
I MENUI button> Vehicle> left con­
trol button >
Service & checks > Service intervals
> Reset oil change interval.
@ Note
-Only reset the oil change indicator if the oi l
was changed.
- Following the service intervals is crit ica l to
maintaining the service life and value of
your vehicle, especially the engi ne. Even if
the mileage on the vehicle is low, do not ex­
ceed the time for the next service.
243

Wheels
store the pressure again in the Infotainment sys­
tem
i::> page 262 .
mm (Tir e Pr essure Monitoring System) Tire
pressure: malfunction! See owner's manual -
if
mm appears after switching on the ignition or
while driving and then the
[DJ indicator light in
the instrument cluster also starts to blink for
about one minute and then stays on permanen t­
ly, there is a system malfunction. Try to store the
correct tire pressures
<=:> page 262 . If the indica­
tor light does turn off or turns on again after a
short period of time, drive to an authorized Audi
dealer or authorized Aud i Serv ice Facility immedi­
ately to have the malfunction corrected .
_& WARNING
-If the tire pressure indicator appears in the
display, reduce your speed immediately and
avoid any hard steering or braking maneu­
vers. Stop as soon as possible and check the
tires and their pressure.
- The driver is responsible for maintaining the
correct tire pressures. You must check the
tire pressures regularly.
-Under certain conditions (such as a sporty
driving style, winter conditions or unpaved
roads), the pressure monitor indicator may
be delayed .
- Do not use run-flat tires on your vehicle. Us­
ing them when not permitted can lead to
vehicle damage or accidents .
(D Tips
- The tire pressure monitoring system can al­
so stop working when there is an ESC mal­
function.
- Using snow chains may result in a system
malfunction.
- The tires with the identification
"AO"
¢page 251 have been matched with your
Audi tire pressure monitoring system . Using
these tires is recommended.
262
Storing tire pressures
Applies to: vehicles with Tire P ressure Monitoring System in­
dicator
If the t ire pr essure chang es or a tire is replaced ,
it must be confirmed in the Infotainment sys­
tem.
.,. Make sure before storing that the tire pressures
of all four tires meet the specified values and
a re adapted to the load
<=:>page 253.
.,. Switch the ignition on.
.,. Select in the Infotainment system : the!M ENUI
button > Vehicle > left control button > Service
& checks> Tire pressure monitoring .
(D Tips
Do not store the tire pressures if snow chains
are installed .
Tire pressure monitoring
system
ill General notes
Each tire, including the spare (if provided),
should be checked monthly when cold and inflat­
ed to the inflation pressure recommended by the
vehicle manufacturer on the vehicle placard or
tire inflation pressure label. (If your vehicle has
tires of a different size than the size indicated on
the vehicle placard or tir e inflation pr essure la­
bel, you should determine the proper tire infla­
tion pressure for those tires).
As an added safety feature, your vehicle has been
equipped with a tire pressure monitoring system
( T PMS) that illuminates a low tire pressure tell­
tale when one or more of you r tires is significant­
ly under-inflated. Accordingly, when the low tire
pressure telltale illuminates, you should stop and
check your tires as soon as possible, and inflate
them to the proper pressure . Driving on a signifi­
cant ly under-inflated t ire causes the tire to over­
heat and can lead to tire failur e. Under-inflation
also reduces fuel efficiency and tire tread life,
and may affect the vehicle's handling and stop-
ping ability.
..,.

Wheels
Displaying tire pressures/temperatures
Applies to: vehicles with tire pressure monitoring system
Requirement: you must be d rivi ng the veh icle .
"'Se lect in the Infotainment system: IMENU I but­
ton
> Service & checks > Tire pre ssur e monitor­
ing > Di splay tire pressure.
- Green:
the current tire pressure and the speci­
fied t ire pressure are approximately the same .
-Yellow: the current tire pressure is too low
compared to the specified tire pressure .
The specified tire press ure is the last tire pres ­
sure that was stored
c> page 264.
Note that t he tire p ressure also de pends on the
temperature of the tire . The tire press ure in­
creases as the engine becomes wa rmer whi le
driving.
A WARNING
Read and follow the important information
and notes
c> page 263.
(D Tips
The tire pressure or temperature is not d is ­
played while the veh icle is stationary and in
adaptation mode. Dashes --.--are shown in
place of the pressu re and temperature.
(D Tire pressure loss
Applies to: vehicles with tire pressure monitoring system
-
If the Rt] indicato r light turns on, the p ressure in
at least one t ire is too low o r new sensors we re
not adapted :
[I] indicator lights turns on after turning the
ignition on
The tire pressure is too low compared to the
specified p ressure.
"' Check and store the t ire pressure(s) the next
time it is poss ible
c> page 264 .
[I] indicator light turns on while dri ving
Wheels with new sensors were not adapted or
the t ire pressure has reached a critical leve l com­
pared to the specified pressure .
264
"'Avoid unnecessary steering and brak ing maneu -
vers .
"'Adapt your dr iving sty le to the s ituation.
"' Stop as soon as possible and check the tire(s).
"'If it is possib le to continue driv ing, see an au-
thorized Audi dealer or authorized Aud i Service
Facility immediately and have your tire(s) re­
pa ired o r rep laced .
A WARNING
Read and fo llow the impo rtant info rmation
and n otes
c>page 263.
Storing new tire pressures
Applies to: vehicles with tire pressure monitoring system
Correctly stored tire pressure specifications are
necessary for reliable tire pressure monitoring.
-
It is always necessary to store the t ire pressures
whe n the t ire pressu res a re modified, fo r exam­
ple d ue to a change in load . o r when new senso rs
a re installed.
"' Before storing the t ire pressures, make su re the
tire pressures of all four t ires meet the spec i­
fied va lues and are adapted to t he load
c::> page 254, fig. 190 . Only correct and store
the pressure in tires whose temperature is ap ­
proximate ly the same as the ambient tempera ­
t u re . If the temperature of the tire is higher
than the ambient air temperature, the tire pressure must be increased approximately
3.0 PSI (0.2 bar) above the value on the st icker.
"' Switch the ignit ion on .
"'Select in the Infotainment system : IMENU! but­
ton
> Service & checks > Tire pressure monitor­
ing > Store tire pre ssure > Ye s, store now .
Af­
ter storing the t ire pressures, the t ire press ure
mon itor ing system measures the c urrent pres ­
sures while driving and stores them as the new
specified pressures .
"'If the changed tire pressures are not displayed
in the Infotainment system, drive the vehicle
for approximately 10 minutes so that the sen­ sor signa l from the wheels is received again .
During this adaptation phase, -- .- - is d isplayed
for the pressure and temperature and the tire pressure monitoring system is on ly partially

Cl 00 .-< N r-­N .-< 0 r-­Vl 00
availab le . It only provides a warning if one o r
more tire pressures is be low the minimum per ­
mitted specif ied pressure .
If the
[I] indica to r lig ht turns on and the mes­
sage
Tire pressure: wheel change detected .
Please check all tires and store pressures in
MMI also appears, the system has detected that
the posit ion of the sensors has changed because
of a tire rotation, or that new sensors were in­
stalled . Store the new tire pressures.
A WARNING -
Read and follow the important informa tion
and notes<=;>
page 263.
Malfunctions
App lies to: ve hicles with tire press ure m onitoring system
If t he tire pressure monitoring system is not
available, the
m;i ind icat or light appears in the
in str ument cluster display along with th e mes­
sage
Tire pressure: malfunction! See owner's
manual.
I f the @m in dica tor light appears after switch­
ing the ignition on or while dr iv in g and the
[I] in­
d icator light also blinks for approximate ly one
minute and t hen stays on, there is system ma l­
function. The following are examples of sit ua­
tions that cou ld cause a malfunction:
-If the message appears at the end o f the adap ­
tation phase, the system may not detect one or
severa l of the wheel senso rs necessa ry for pres ­
s ur e monitoring. This may result from one or
more wheels being installed without wheel sen­
sors or with incompatible wheel sensors .
- A wheel sensor o r another component has
failed.
- Using snow cha ins can affect the f unction of
the system because of the shie lding effect of
the cha ins.
- The tire pressure monitor ing system is not
available due to a malfunction.
- Transmitters with the same frequency, such as
headphones or remote-controlled dev ices, may
cause a temporary system malfunction due to
the strong electromagnetic field .
Wheels
The m;i indicator lig ht and the message turn off
once the tire pressure monitoring system is avail ­
able again. If you cannot co rrect the malfunction
and
the m indicator light stays on, drive imme­
diately to an authorized Audi dea ler or author­
ized Audi Se rvice Facility to have the malfunct ion
repaired.
265

Care and cleaning
Care and cleaning
General information
Regular, proper care helps to maintain your vehi­
cle's value. It can also be a requirement when
submitting warranty claims for corrosion damage
and paint defects on the body.
The necessary care products can be obtained
from an authorized Audi dea ler or authorized
Audi Service Facility. Read and follow the instruc ­
tions for use on the packaging.
A WARNING
-Using cleaning and care products incorrectly
can be dangerous to your health.
- Always store clean ing and care products out
of reach of children to reduce the r isk of poi­
sonin g.
@ For the sake of the environment
- Preferab ly purchase environmenta lly-friend­
l y cleaning products.
- Do not dispose of leftover cleaning and care
products with household trash.
Car washes
The longer that deposits remain on the vehicle,
the more the surface may be damaged. High
temperatures such as those caused by sunlight increase the damaging effect .
Before washing, rinse
off heavy deposits with
p lenty of water.
Stubborn deposits such as bird droppings or tree
sap are best removed with plenty of water and a
microfiber cloth.
A lso, wash the underside of yo ur vehicle once
road sa lt stops being used for the season.
Pressure washers
When washing your veh icle w ith a pressure wash­
er, always follow the operating instructions pro­
vided with the press ure washer. This is espec ially
impor tant in r egard to the pressure and spraying
distance. Do not direct th e stream of water di­
rect ly onto seals for the side windows, doors,
266
lug gage compartment lid or hood, or onto the
tires, rubber hoses, insulating material, sensors*
or camera lenses* . Keep a distance of at least 16
i n
(40 cm).
Do not remove snow and ice with a pressure
washer.
Never use cone nozz les or high pressure nozzles.
The water temperature must not be above
140 °F
(60 °() .
Automatic car washes
Spray off the vehicle before washing.
Make sure that the windows are closed and the
winds hield wipers are
off. Follow instructions
from the car wash operator, espec ia lly if there
are accessories attached to your veh icle.
If possible, use car washes that do not have
brushes.
Washing by hand
Clean the vehicl e starting from the top and work­
in g down using a soft sponge or cl eaning br ush.
Use solvent-free cleaning products.
Washing vehicles with matte finish paint by
hand
To avoid damaging the paint when washing, first
remove dust and large part icles from you r vehi ­
cle. Insects, grease spots and fingerprints are
best removed with a special cleaner for matte
finish paint.
Apply t he product using a microfiber cloth. To
avoid damaging th e paint surface, do not use too
much pressure.
R inse the vehicl e thoroughly with wate r. Then
clean using a neutra l shampoo and a soft micro­
f iber cloth .
Rinse the vehicl e thoroughly again and let it air
dry. Remove any water residue using a chamois.
A WARNING
-Only wash the vehicle when the ignition is
off and follow the instructions from the car
-