brake AUDI A5 CABRIOLET 2015 Workshop Manual

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-To avoid being burned, do not spi ll anti­
freeze or coolant on the exhaust system or hot engine parts. Under certain condi­
tions, the ethylene glycol in engine cool­ ant can catch fire.
- Antifreeze is poisonous. Always store anti­
freeze in its original conta iner and well out
of the reach of ch ildren .
-If you drain the coolant, it must be caught
and safely stored in a proper container
clearly marked "poison" .
(D Note
-Do not add coolant if the expansion tank is
empty . Air could enter the cooling system
and damage the eng ine .
If this is the case,
do not continue driving. Seek profess ional
ass istance.
- Coolant pollutes the env ironment and could
cause an eng ine fire . Excess coolant will be
fo rced out through the pressure relief valve
i n the cap when the eng ine becomes hot.
- If, i n an emergency , only water can be add­
ed, the correct ratio between wa ter and an­
tifreeze
~ page 200 must be restored as
soon as possib le .
@) For the sake of the environment
Drained coolant should not be reused. Always
dispose o f used coolant while observ ing all
environmental regulations .
Radiator fan
The radiator fan switches on automatically by it­
self.
The radiator fan is driven by the engine via the V­
be lt . The viscous clu tch regulates the speed of
the fan ac cording to the temperature of the cool ­
ant.
An auxiliary e lectr ic rad iator fan* switches on and
off depend ing on coolant temperat ure and othe r
veh icle operati ng conditions.
Afte r you switch the engine off, the auxiliary fan
can continue runn ing for up to 10 minutes -even
Ch eck in g and Fillin g
with the ignition off . It can even switch on again
later by itself¢& , if
- the temperatu re of the engine coo lant rises due
to the heat build- up from the engine in the en­
gine compartment, or
- the engine compartment heats up because the
veh icle is parked in intense sun light .
A WARNING
-To reduce the risk of persona l injury never
touch the radiator fan .
- The auxiliary electric fan is temperature con­ trolled and can switch on suddenly even
when the engine is not running.
- The a uxiliary radiator fan sw itches on auto­
matica lly when the engine coolant reaches a
certain temperature and will continue to run
until the coolant temperature drops.
Brake fluid
Checking brake fluid level
The brake fluid level can be checked with a quick
glance .
Fig. 17 6 Engine compar tment : Cove r on the b rake fl uid
r e servoir
Before you check anyth ing in the engine compart ­
ment,
al way s read and h eed all WARNIN GS
¢ _.& in Working in the engine compartment on
page 195 .
.,. Read the brake fluid level from the b rake fluid
reservoir ¢
fig. 176, ¢ page 197, fig . 172 . The
brake fluid level must be between the
"MIN "
and "MAX " markings.
20 3

Checking and F ill in g
The brake fluid reservoir is located at the rear
partition of the engine compartment on t he left
side ¢
page 197.
The fl uid level may drop slightly after some time
due to the automatic adjustment of the brake
pads. This is not cause for alarm.
If the b ra ke fluid level fal ls considerably below
the "MIN" mark, the brake warn ing/indi cator
light (U.S. models:
1111 , Canadian models: . )
will come on ¢
page 15. Do not contin ue to oper­
ate the vehicle . The complete brake system
should be thoroughly checked by an author iz ed
Aud i dealer or qualified workshop and the cause
corrected . If the brake fluid level is too low, the
brake warning/ind icator light w ill illuminate .
Contact an authorized Audi dealer
i mmed iately .
{D) Tips
The brake fluid reservoir is located under­
neath the cove r.
Changing brake fluid
Have the brake fluid changed by an experienced
technician .
Brake fluid absorbs moist ure from the a ir. If the
water content in the brake fluid is too high, cor­ rosion in the brake system may result after a peri­
od of time . The boiling point of the brake flu id
w ill also decrease conside rably and dec rease
b rak ing perfo rmance.
Therefore, the brake flu id must be changed
e ve ry
two year s.
Always use new brake fluid w hich con­
forms to Fede ral Motor Vehicle Standard "FMVSS
1 16 DOT 4".
The brake fluid rese rvoir can be difficult to reach,
therefo re , we recommend that you have the
b rake fluid changed by your author ized
Audi
dealer .
Your dealer has the correct too ls , the
right brake fluid and the know-how to do t his for
you.
A WARNING
- B rake fluid is poisonous. It must be stored
on ly in the closed original container out of
the reach of children!
204
- Brake fail ure can resu lt from o ld or inappro­
priate brake fluid. Observe these precau ­
tions:
- Use only b rake fluid that meets SAE spec i­
f ica tion
J 170 3 and conform s to Federa l
Motor Vehicle Standard 116. Always check
with yo ur autho rized Audi dea le r to make
su re you are using the correct brake fl uid.
The correct type of brake flu id is also ind i­
cated on the brake fluid reservoir.
- The brake fl uid must be new. Heavy use of
the brakes can cause a vapor lock if the
brake f luid is left in the system too long.
This can seriously affect the efficiency of
the brakes as well as your safety. This
could result in an acc ident.
(D Note
Brake fluid will damage the paint of your vehi­
cle.
@ For the sake of the env ironment
Because of the prob lem of prope r disposal of
brake fluid as well as the special tools re­
qu ired and the necessary expert ise, we rec­
omme nd that you have the brake flu id
changed by you r autho rized Aud i dea le r.
Battery
, General information
U nder normal operating conditions, the battery
i n your Audi does not need any maintenance.
Wi th
high outside temperatures or long daily
drives we recommend that you have the e lectro ­
lyte level checked by an a uth orized Aud i deale r o r
qualified workshop . The electrolyte leve l should
a lso be checked each time the batte ry is c ha rged
~ page 206.
Have the battery checked when yo u take your ve­
hicle in for service . You a re well adv ised to re­
pla ce a battery that is older tha n 5 years.
With certain types of airbag deployment, the bat ­
te ry is disconnected from the veh icle elect rical
system for safety reasons
¢ & in Repair, care
and disposal of the airbags on page 1 45.

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® Mud and snow capability
"M/S" or "M+S" indicates the tire
has characte ris tics that make it
suitable for driving on mud and snow .
& indica tes a winter tire.
@ Composition of the tire cord
and materials
T he number of plies indicates the
number of rubber ized fabric lay­
ers in the tire . In general: the
more layers, the more weight a
tire can carry. Tire manufacturers
must also specify the mater ials
used in the tire. These include
stee l, nylon, polyester and other
materials.
@ Maximum permitted load
This number indicates the maxi­
mum load in kilograms and
pounds that the tire can carry.
@ Uniform tire quality grade
standards for treadwear,
traction and temperature resistance
Treadwear , traction and tempera­
ture ranges
c::::> page 225 .
@Running direction
The arrows ind icate the running
direction of unidirect ional tires.
You must always follow the speci- fied running direction
c::::> page 235.
€3) Ma
ximum permitted
inflation pressure
Whe els
This number indicates the maxi­
mum pressure to which a tire can
be inflated unde r normal operat­
ing conditions.
Glossary of t ire and loading
terminology
Accessory weight
means the combined weight (in
excess of those standard items
which may be replaced) of auto­ matic transmission, power steer­
ing, power brakes, power win­
dows, power seats, radio, and
heater, to the extent that these
items are available as factory-in ­
stalled equipment (whether in­
stalled or not).
Aspect ratio
means the ratio of the height to
the width of the tire in percent. Numbers of 55 or lower indicate a
low s idewall for improved steer­
ing response and better overall
handling on dry pavement . .,.
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(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight, and
(d) Product ion options weight
Maximum (permissible)
inflation pressure
means the max im um cold infla­
tion pressu re to which a tire may
be inflated . Also called "maxi­
mum inflation pressure ."
Normal occupant weight
means 150 lbs . (68 kilog rams)
times the number of occupants
seated in the veh ic le up to the to­
tal seating capacity of yo ur vehi­
c le.
Occupant distribution
means d istr ibution of occupants
in a vehicle.
Outer diameter
means the overall diameter of an
inflated new tire .
Overall width
means the linear dis tance be­
tween the exter iors of the side­
walls of an inflated tire, including
elevations d ue to labe ling, deco­
rations , or protective bands or
ribs .
Whee ls
Ply
means a layer of rubbe r-coated
parallel cords .
Production options weight
means the comb ined weight o f
those installed regular production
options weighing over 5 lbs . (2 .3
kg) in excess o f those s tandard
items which they re place , not pre ­
viously conside red in cu rb weight
or accessory weight, including heavy duty brakes, ride levelers,
heavy du ty bat tery, and special
trim .
Radial ply tire
means a pneumat ic t ire in which
the ply co rds that ex tend to the
beads are laid at substantially 90
degrees to t he ce nterli ne of the
tread .
Recommended inflation
pressure
see ~ page 212, Cold tire infla­
tion pressure .
Reinforced tire
means a tire designed to operate
at higher loads and at h igher in­
flat ion pressures than the corre­
sponding standard tire . Rein­
f orced tires may be identified as
2 13

_& WARNING -
-Only use tire/rim combina­tions and suitable wheel bolts
that have been approved by
Audi. Otherwise, damage to
the vehicle and an accident
could result.
- For technical reasons, it is not
possible to use tires from oth­
er vehicles -in some cases,
you cannot even use tires from
the same vehicle model.
- Make sure that the tires you
select have enough clearance
to the vehicle. Replacement
tires should not be chosen simply based on the nominal
size, because tires with a dif­
ferent construction can differ
greatly even if they are the
same size. If there is not
enough clearance, the tires or
the vehicle can be damaged
and this can reduce driving
safety and increase the risk of
an accident.
-Only use tires that are more
than 6 years old when abso­
lutely necessary and drive
carefully when doing so.
-If you install wheel covers on
the vehicle, make sure they al­ low enough air circulation to
Wheels
cool the brake system. If they
do not, this could increase the
risk of an accident.
Tire wear/damage
Fig. 180 Tire profile: Treadwear indica­
tor
Tire wear
Check the tires regularly for wear.
- Inflation pressure that is too low
or high can increase tire wear
considerably.
-Driving quickly through curves,
rapid acceleration and heavy
braking increase tire wear.
- Have an authorized Audi dealer
or authorized repair facility
check the wheel alignment if
there is unusual wear.
-Have the wheels rebalanced if an imbalance is causing noticeable
vibration in the steering wheel. If you do not, the tires and other
vehicle components could wear more quickly.
217
...

Wheels
passengers that the vehicle is in­
tended to carry ("seating capaci­
ty") with an assumed weight of 150 lbs. (68 kg) for each passen­
ger at a designated seating posi­
tion and the total weight of any
luggage in the vehicle. If you tow
a trailer, the weight of the trailer
hitch and the tongue weight of
the loaded trailer must be includ­
ed as part of the vehicle load.
The
Gross Axle Weight Rating
("GAWR") is the maximum load
that can be applied at each of the
vehicle's two axles.
The fact that there is an upper limit to your vehicle's Gross Vehi­
cle Weight Rating means that the
total weight of whatever is being
carried in the vehicle (including
the weight of a trailer hitch and
the tongue weight of the loaded
trailer) is limited. The more pas­
sengers in the vehicle or passen­
gers who are heavier than the
standard weights assumed mean
that less weight can be carried as
luggage.
The Gross Vehicle Weight Rating
and the Gross Axle Weight Rating
are listed on the safety compli­
ance sticker label located on the
222
driver's side B-pillar ~ page 219,
fig. 181.
~ WARNING
Overloading a vehicle can cause
loss of vehicle control, a crash
or other accident, serious per­
sonal 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 the loss of
vehicle control.
-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 overloaded can fail sud­
denly, including a blowout and
sudden deflation, causing loss
of control and a crash.
-A lways make sure that the to­
tal load being transported -
including the weight of a trail­
er hitch and the tongue
weight of a loaded trailer -
does not make the vehicle
heavier than the vehicle's
Gross Vehicle Weight Rating.

Emerg enc y ass is tance
There are some restrictions on the use of the
compact spare tire. The compact spare tire has
been designed specifically for your type of vehi­
cle. It must not be swapped with a compact
spare tire from another type of vehicle.
Snow chains
For technical reasons, the use of snow chains on
the compact spare tire is
not permitted .
If you do have to drive w ith snow cha ins and a
front tire f ails, mount the spare whee l with tire
instead of a rear tire. Install the snow chains on
the rear tire and use it to replace the defective
front tire .
A WARNING
-Never use the spare tire if it is damaged or if
it is worn down to the tread wear ind icators.
- If the spare t ire is more than 6 years o ld,
use it only in an emergency and with ex­
treme caut ion and careful driving.
- The spare tire is intended only for tempora­
ry and short-term use.
It should be replaced
as soon as possible with the norma l wheel
and t ire.
- After mounting the compact spare tire, the
tire pressure must be checked as soon as
poss ible. The tire pressure of the compact
spare t ire must be 4.2 bar; otherwise, you
risk having an a cc ident.
- Do not drive faster than 50 mph (80 km/h) .
You r isk having an accident.
- Avoid full-throttle acce lerat ion, heavy brak­
ing, and fast cornering. You r is k having an
a cc ident.
- Never dr ive using more than one spare
wheel and tire. You risk hav ing an accident.
- Norma l summer or winter tires must not be
mounted on the compact spare whee l rim.
- For technical reasons, the use of tire chains
on the spare tire is not permitted. If it is
necessary to drive w ith tire chains, the spare
wheel m ust be mounted on the front axle in
the event of a flat in a rear tire. The new ly
available front wheel must then be installed
in place of the rear wheel with the flat tire .
230
Installing the tire chain before mounting
the wheel and tire is recommended.
- Loose items in the passenger compartment
can cause serious personal injury during
hard braking or in an accident. Never store
the spare tire or jack and tools in the pas­
senger compartment .
Replacing wheels
Before changing a wheel
Observe the following precautions for your own
and your passenger 's safety when changing a
wheel.
~ After you experience a t ire failure, pu ll the ca r
wel l away from mov ing traffic and t ry to reac h
le vel ground before you stop ¢ ,& .
~ All passengers should lea ve the car and move
to a safe location (for instance, behind the
guardrail) ¢,& .
~ Engage the parking brake to prevent your vehi­
cle from ro lling unintent ionally¢ ,&.
~ Move the selecto r lever to the P position .
~ If you are towing a trailer: unhitch the trailer
from your veh icle.
~ Take t he jack c::> page 229 and the s pare tire
<=:> page 229 out of the luggage compa rtment.
,.b WARNING
-You o r your passengers could be injured wh ile
changing a whee l if yo u do not follow these
safety precautions:
- If you have a flat tire, move a safe d istance
off the road. T urn off the eng ine, turn the
emergency flashers on and use other warn­
ing devices to alert other motor ists.
- Make sure that passengers wait in a safe
place away from the vehicle and well away
from the road and traffic.
- To help prevent the vehicle from moving
suddenly and possibly slipping off the jack,
always fully set the parking brake and block
the wheel diagonally opposite the wheel be­
ing changed with the folding chocks or oth-
er objects. When one front wheel is lifted
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Raising the vehicle
The vehicle must be li~ed with the jack first be­
fore the wheel can be removed .
Fig. 189 Sill panels: markings
Fig . 190 Sill: posit ion ing the vehicl e jack
The location of the jack point is indicated by an
indentation on the underside of the vehicle
c::> fig. 189.
;:;; N 0 u. a, ID
.,.. Activate the pa rkin g brake to prevent the vehi­
cle from rolling unintentionally.
.,.. Move the se lector lever to position P .
.,.. Find the
m ar king (imprint) on the si ll that is
nearest the wheel that wi ll be changed
<=> fig . 189. Behind the marking, there is a lift­
ing point on the sill for the vehicle jack .
.,.. Turn the
vehicl e jack located under the lifting
point on the si ll to raise the jack until the jaw
<=> fig. 19O @cove rs the n o tch on the vehicle
Q ,& c::>0.
.,.. Align the vehi cle jack so the jaw @covers the
notch and the base plate @ is f lat on the floor.
The base plate @ must be
vertical under the
lifting point @.
.,.. Install the rod on the veh icle jack: Insert the
rod into the opening on the handwheel. Turn
the rod left or right to secure it.
Em erg en cy ass is tan ce
.,.. Continue raising the jack wit h the rod unt il the
wheel lifts off the ground slightly.
Position t he vehicle jack
only under the designat­
ed lifting points on the si ll
r:1>fig. 189. The re is ex­
actly
one l ocation fo r each wheel. The jack must
not be posit ioned at any other location
c::> .& c::>0 .
Soft ground under the jack can cause the veh icle
to s lip off the jack. A lways place the jack on firm
ground. Use a flat, stable support if necessary.
Use a non-slip surface suc h as a rubber mat on a
slipper y surface such as tile.
_& WARNING
--You or your passengers could be injured
while changing a wheel if you do not follow
these safety precautions:
- Position the vehi cle jack on ly at the desig­
nated lifting points and a lign the jack.
Otherwise, the vehicle jack could slip and
cause an injury if it does not have suffi­
cient hold on the vehicle.
- A soft or unstable surface under the jack
may cause the vehicle to slip off the jack .
Always provide a firm base for the jack on
the g round. If necessary, use a sturdy
board under the jack.
- On hard, slippery surface (such as tiles)
use a rubber mat or similar to prevent the
jack from slipp ing .
- To help prevent injury to yourself and your
passengers:
- Do no t ra ise the vehicle until you are s ure
the jack is secure ly engaged.
- Passengers must not remain in the veh icle
when it is jacked up .
- Make sure tha t passengers wait in a safe
pla ce away from the veh icle and we ll away
from the road and traffic.
- Make sure jack pos ition is cor rect, adjus t
as necessary and then contin ue to raise
the jack .
(D Note
Do not lift the vehicle by the sill. Posi tion the
vehicle j ack only at the des igna ted lifting
233

Emergency assistance
points on the sill. Otherwise, your vehicle will
be damaged.
Taking the wheel off/installing the spare
tire
Follow these instructions step-by-step for chang ­
ing the wheel .
Fig. 191 Cha ngin g a w hee l: u sing t he screwd rive r hand le
(w ith t he blade re moved) to turn the bo lts
Fig. 192 C han gin g a w heel: align men t pin inside the top
h ole
After you have loosened all wheel bolts and
ra ised the veh icle off the ground, remove and re­
p la ce the whee l as follows:
Removing the wheel
"' Remove the topmost wheel bolt completely
with the
hexagonal socket in the screwdriver
handle (vehicle tool kit)
r=;, fig. 191 and set it
aside on a
clean surface.
"' Screw the threaded end of the
alignment pin
from the tool kit hand-tight into the empty bo lt
hole
r=;, fig . 192.
"' Then remove the other wheel bo lts as described
above.
"' Take off the wheel leaving the alignment pin in
the bolt hole
r=;,(I).
234
Putting on the spare tire
"'Push the spare tire over the alignment pin.
"' Screw on the wheel bolts and tighten them
slightly using the hexagona l socket .
"' Remove the alignment pin and insert and tight­
en the remaining wheel bolt slightly like the
rest.
"' Turn the jack hand le counter-clockwise to lower
the vehicle until the jack is fully released .
"' Use the wheel bolt wrench to tighten all wheel
bolts firmly
r=;, page 232. Tighten them in a
crisscross pattern,
from one bolt to the (ap­
proximately) opposite one, to keep the wheel
centered.
"' Perform the steps required after changing the
wheel
r=;, page 231, A~er changing a wheel .
The hexagonal socket makes it easie r to remove
the wheel bolts from the rim. Care should be tak­
en when removing the reversib le blade .
(D Note
When removing or installing the wheel, the
rim could hit the brake rotor and damage the
rotor. Work carefully and have a second per­
son to he lp you.
(D Tips
- When mounting tires with unidirectional
tread design
make sure the tread pattern is
pointed the right way
r=;, page 235.
- The wheel bolts should be clean and easy to
turn. Check for dirt and corrosion on the
mating surfaces of both the wheel and the
hub. Remove all dirt from these surfaces be­
fore remounting the wheel.
- Do not use the hexagonal socket in the
screwdriver handle to loosen or tighten the
wheel bolts.

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Fu se pa nel @ (black )
No. Consumer
1 Dynamic steering
2 Electron ic Stabilization Control (module)
A/C system pressure sensor, electrome-
chanical parking brake, HomeLink, auto-
3 mat
ic dimming interior rear view mirror,
air quality/outside air sensor, Electron ic
Stabilization Control (button)
s Sound actuator
6 Headlight range control/headl
ight (corner-
ing light)
7 Headlight (cornering light)
Control modu les (electromechanical park-
8 ing brake, shock absorber, q uattro sport),
DCDC converte r
9 Adaptive
cruise control
10 Shift gate/clutch sensor
11 Side assist
1 2 Headlight range cont ro l, parking system
13 Airbag
14 Rear
wiper (a llroad)
15 Auxiliary fuse (instrument panel)
16 Auxiliary
fuse termina l 15 (engine area)
Fuse p anel @ (brown )
No. C onsumer
2 Brake light sensor
3 Fuel pump
4 Clutch sensor
5
Left seat heating with/without seat venti-
lation
6 Electronic Stabilization Control (electric)
7 Ho rn
8
Front left door (window regulator, central
locking, mirror, switch, lighting)
9 Windshield wiper motor
10 Electronic Stabilization Control (valves) Fu
ses a nd bulb s
No. Consumer
Two-door mode ls: rear left window regula-
11 tor; Four-door
models: rear left door (win-
dow regulator, central locking, switch,
light ing)
12 Rain and l
ight sensor
Fuse panel © (r e d )
No . Con sumer
3 Lumbar support
4 Dynamic steering
5 Inter
ior l ight ing (Cabriolet)
6 Windshie
ld washer system, headlight
washer system
7 Vehicle electrica l system control module 1
8 Vehicle electr ica l system control module 1
9 Left rear
window regulator motor (Ca brio-
let)/su nroof
10 Vehicle electr ica l system co ntrol module 1
11 Right rear
window regulator (Cabriolet)/
sun shade motor
12 Anti-theft
alarm warning system
Right cockpit fuse assignment
Fig. 195 Right cockpit: fu se panel with plastic cl ip
237