2011 AUDI A5 COUPE brake

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0 Note
• Coolant pollutes the environment and could cause an engine fire.
Excess coolant will be forced out through the pressure relief valve in
the cap when the engine becomes hot .
• If, in an emergency, only water can be added, the correct ratio
between water a nd antifreeze ::::>
page 281 must be restored as soon
as possible.
ci> For the sake of the environment
Drained coolant should not be reused. Always dispose of used coolant
wh ile observ ing all environmental regulations.•
Radiator fan
The radiator fan switches on automatically by itself.
The radiator fan is driven by the engine v ia the V-belt. The viscous
clutch regulates the speed of the fan according to the temperature of
t he coo lant.
An auxiliary electr ic radiator fan* sw itches on and off depending on
coolant temperature and other vehicle operating conditions.
After you switch the engine off, the auxiliary fan can cont inue running
for up to 10 minutes- even with the ignition off. It can even switch on
again later by itse lf::::>
/1 , if
• the temperature of the engine coolant rises due to the heat build­
up from the engine in the engine compartment, or
• the engine compartment heats up because the veh icle is parked in
intense sunlight.
& WARNING
• To reduce the risk of personal injury never touch the radiator
fan.
/1 WARNING (continued)
• The auxiliary electric fan is temperature controlled and can
switch on suddenly even when the engine is not running.
• The auxiliary radiator fan switches on automatically 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 . 209 Engine
co mpartm ent : Brake
fluid reservoir
Before you check anything in the engine compartment,
always read and heed all WARNINGS=> & in "Working in
the engine compartment" on
page 275.
-Read the brake fluid level from the brake fluid reservoir
=> fig. 209. The brake fluid level must be between the
"MIN" and "MAX" markings.
The brake fluid reservoir is located at the rear partition of the engine
compartment on the left side=>
page 276. .,

___________________________________________ C_ h_e _c _k_ i_n ~g_ a_n_ d_ f_ i_ll _i_n _g __ _
The fluid level may drop slightly after some time due to the auto­
matic adjustment of the brake pads. This is not cause for alarm.
If the brake flu id level falls considerably below the "MIN " mark, the
brake warning/indicator light (U.S. models:
BRAKE , Canadian mode ls:
{(j)) ) will come on=> page 18 and=> page 33. Do not continue to
ope rate the vehicle. The complete brake system should be thorough ly
checked by an authorized Audi dealer or qualified workshop and the
cause corrected. If the brake fluid level is too low, the brake
wa rning/ind icator light will illuminate. Contact an authorized Aud i
dealer
immediately .
[I] Tips
The brake fluid reservoir is located undernea th the cover. •
Changing brake fluid
Hove the broke fluid changed by on experienced techni­
Clon.
Brake fluid absorbs moisture from the air. If the water content in the
brake fl uid is too high, corrosion in the brake system may result after
a period of time. The boiling point of the brake fluid will also decrease
considerably and decrease braking performance.
Therefore, the brake flu id must be changed
every two years. Always
use new brake fluid which conforms to Federal Motor Vehicle Stan­
dard "FMVSS 116 DOT 4".
The brake fluid reservoir can be difficult to reach, therefore, we
recommend that you have the brake fluid changed by your authorized
Audi dealer. Your dealer has the correct tools, the right brake fluid
and the know-how to do this for you .
& WARNING
• Brake fluid is poi sonous. It must be stored only in the closed
original container out of the reach of children!
Safety first
& WARNING (continued )
• Brake failure can result from old or inappropriate brake fluid.
Observe these precautions:
-Use only brake fluid that meets SAE specification
J 1703 and
conforms to Federal Motor Vehicle Standard 116. Always check
with your authorized Audi dealer to make sure you are using
the correct brake fluid . The correct type of brake fluid is also
indicated on the brake fluid reservoir.
- The brake fluid must be new. Heavy use of the brakes can
cause a vapor lock if the brake fluid 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 accident .
0 Note
Brake fluid will damage the paint of your vehicle.
ffi For the sake of the environment
Because of the prob lem of proper disposal of brake fluid as well as
th e special tools required and the necessary expertise, we recom­
mend that you have the brake fluid changed by your author ized Audi
dealer. •
Battery
General information
Under normal operating conditions, the battery in your Audi does not
need any maintenance . With high outside temperatures or long daily
drives we recommend that you have the electro lyte level checked by
an authorized Audi dealer or qualified workshop . The electrolyte leve l
should also be checked each t ime the battery is charged=> page 288.
~
Vehicle care Technical data

__________________________________________________ T_i_ r _e _s_ a_ n_ d_ w_ h_e_ e _ l_s __ _
Tires and wheels
Tires
General notes
Tires may be the least appreciated and most abused
parts of a motor vehicle.
T ir es may be the least appreciated and most abused pa rts of a motor
vehicle . Tires are, however, one of the most important parts of a
vehicle , pa rticul arly conside ring the comparat ive ly small patch of
rubber on eac h tire that assures that all-important contact between
you, your veh icle and the road.
Maintai ning t he cor rect tire pressu re, mak ing su re that your veh icle
and i ts tires do not have to carry more weight t han they can safely
hand le, avoid ing damage from road ha za rds and regularly inspecting
tires for damage includ ing cuts, s lashes irregular wea r and ove rall
condi tion a re the mos t important th ings that you can do to help avoid
sudden t ire failure including tread separation and blowouts.
Avoiding damage
If you have to d rive ove r a cur b or sim ilar obstacle, d rive very slowly
and as close as possible at a rig ht angle to the curb .
Always keep chemicals incl ud ing grease, oil, gaso line and brake f luid
o ff t he t ires .
Ins pect the ti res regularly for damage (cu ts, cracks o r blisters, e tc.) .
Remove any foreign bodies embe dded in the treads.
Storing tires
M ark tires w hen yo u remove t hem to indica te t he d ire ct io n of rota ­
tion . This ensures you to be ab le to mount them correctly when you
re insta ll them.
Whe n removed, t he wheels or tires should be sto red in a cool, dry and
preferably da rk p lace.
Safety first
Store tires in a v ertica l pos it io n if they a re not mount ed on rims, in a
hor izonta l posit ion if they are mounted on r ims.
New tires
N ew tires have to be broken in~ & .
Th e tre ad d epth of new ti res may v ary, accor ding t o th e type an d
make of t ire and the tread pattern .
Hidden damage
Damage to tires and rims is often not readi ly visible. If yo u notice
unu sual vib ra ti on o r the ve hicle pulls to one side, t his may in dica te
that one of the t ires has been damaged. The tires must be checked
im media tely by an auth oriz ed A ud i d eale r or qual ifie d wor ks hop.
Unidirectional tires
A un id irectional tire can be identified by arrows o n th e sidewall , th at
point in the direct ion the t ire is designed to rotate. You must fo llow
t he s peci fied dire ction o f ro tat io n . This is neces sary so t hat t hese
tires can deve lop their optimum cha racte ristics regard ing g rip, road
noise, we ar an d hy dropl aning res ist an ce. F o r more informat ion
~page 321 .
& WARNING
New tires or tires that are old , worn or damaged cannot provide
maximum control and braking ability.
• New tires tend to be slippery and must also be broken-in . To
reduce the risk of losing control, a collision and serious personal
injuries , drive with special care for the first 350 miles (560 km).
• Driving with worn or damaged tires can lead to loss of control,
sudden tire failure , including a blowout and sudden deflation ,
crashes and serious personal injuries . Have worn or damaged tires
replaced immediately. _..
Vehicle care Technical data

________________________________________________ T_i_re _ s_ a _ n_d_ w_ h_ e_ e_l_s __ _
Groove
means the spa ce between two ad jacen t tread ribs .
Load rating (code)
mea ns the max imu m load th at a tir e is ra te d to c arry fo r a give n infla­
tion pressure. You may not find this information on all t ires beca use
i t is no t required by law .
Maximum load rat ing
me ans the load r ati ng for a t ire at th e maxi mum p ermis sib le in flation
pressure for that tire.
Maximum loaded vehicle weight
means the sum of:
(a) Curb weight
(b) Accessory weig ht
(c) Vehicle ca pacity we ight, and
(d) Pro duct ion op tions weigh t
Maximum (permissible) inflation pressure
means the m aximu m cold infla tio n pr essur e to whi ch a t ire may be
inflated . Also called "maximum inflat ion press ure."
Normal occupant weight
means 150 lbs. (68 k ilog rams) times t he num ber of occupants seate d
in t he vehi cle up to the total sea ting cap aci ty of yo ur vehicl e.
Occupant distribution
means d is tribut ion of occ upan ts i n a vehicle.
Outer diameter
means the ove rall d iameter of an inflated new tire.
Overall width
means the linear distance betwee n the exter iors of the s idewalls of
a n in flated tire, in cludi ng eleva tions due to la beling, dec ora tions, o r
protective bands or ribs.
Safety first
Ply
means a layer o f rubbe r-coate d para llel co rds.
Production options we ight
me ans the co m bine d we ight of tho se in stalled regu lar pr oduction
options weighi ng over 5 lbs. (2.3 kg) in excess of t hose standard
i t ems w hic h they replace, not previously considere d in c urb we igh t o r
accessory weight, includ ing heavy duty brakes , ride levelers, roof
rack, heavy duty battery, and s pecial tr im.
Radial ply tire
me ans a pneuma tic tir e in wh ich the pl y cords that extend to t he
beads are laid at substantially 90 degrees to the centerline of the
t rea d.
Recommended inflation pressure
see => page 292, "C old tire in fla tion pr essu re".
Reinforced tire
mea ns a t ire desig n to operate at h ig her loads and at h igher i nflat io n
pressures tha n the corresponding standard tire . Re inforced tires may
be iden tifi ed as " XL", "x l", "E X TR A LOA D", or "RF " on t he sidew all.
Rim
means a metal suppo rt fo r a tire or a tire and tube assemb ly up on
wh ic h the t ire beads are seated.
Rim diameter
means nom inal d iameter of the bead seat . If you change yo ur whee l
si ze, yo u w ill have to purchase new tires to ma tc h the new r im diam­
eter .
Rim size designation
means r im diamete r and width.
Rim width
mea ns nom inal dis tance be twee n rim flanges.
Vehicle care Technical data

______________________________________________ T_i_r _e _s _ a _ n_d_ w_ h_e_ e_ ls __ l!'II
Remember, your safety and t hat o f your passengers also depends o n
making sure th at load limit s are not exc ee ded . V ehicle load in cludes
every body and everything in a nd on the veh icl e. These load limits are
tec hnically refer red to as t he ve hicle's G ross Vehicle Weight Rating
("G VWR") . The Gross Axle Weight Rat ing ("GA WR") is th e max imum
load that can be a pplied at each of the ve hicle's two ax les. The Gross
Vehicle Weigh t Rating and the G ross Ax le W eig ht R ating are listed on
the safety comp liance st ic ker label located either on the driver's side
B -pillar or on t he inside of th e f uel fi ller f lap. T he tire press ure label
on yo ur Audi lists the maximum comb ined weig ht of all of the occu­
p ants a nd lugg age o r othe r car go tha t t he ve hicl e c an ca rry . Fo r the
location of t he tire pressure label~
page 295, fig. 212.
& WARNING
Overloading a vehicle can cause loss of vehicle control , a crash or
other accident, serious personal injury, and even death .
• Carrying more weight than your vehicle was designed to carry
will prevent the vehicle from handling properly and increase the risk of a 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 suddenly
causing loss of control and a crash.
• Always make sure that the total load being transported -
including the weight of a trailer hitch and the tongue weight of a
loaded trailer -does not make the vehicle heavier than the
vehicle's Gross Vehicle Weight Rating.
& WARNING
• Incorrect tire pressure s and/or underinflation can lead to a
serious or fatal accident .
• Incorrect tire pressures and/or underinflation cause increased
tire wear and can affect the handling of the vehicle .
Safety first
& WARNING (cont inued )
• Incorrect tire pressures and/or underinflation can also lead to
sudden tire failure, including a blowout and sudden deflation,
causing loss of vehicle control. •
Checking tire pressure
The cor rect t ire pres sure fo r the tires o rig inall y installed
on you r veh icle is list ed o n the t ire pr ess ure la bel l ocat ed
e ither on driver's s ide 8-pillar or insi de th e fue l fill er flop.
Th e recommended tire pressure s are on the tire pressur e l abe l and in
the table ~
page 295, "Cold tire inflation press ure" .This means that
t he pressure must be check ed an d a dju sted w hen the tire h as no t
been dr iven for more tha n a cou ple of m iles (k ilometers) at low
s peeds dur ing t he pr evious t hree hour s. Air in the tires ex pands w hen
t he tire heats up as a resu lt of i nterna l fric tion as it flexes in use. The
tire pressu re is hig he r when the t ire has warmed up than when it is
"cold ."
It is the in flation press ure in a "cold" t ire that counts. Therefore, yo u
sh oul d n eve r le t a ir ou t of a warm t ir e to ma tch "C old tire in flatio n
pressure" recommendations~
page 295. The t ires would then be
unde rin flat ed and co uld fail su ddenly.
Th e tire pressu re labe l on yo ur Audi lists t he recommended co ld t ire
inflation pressures at ma ximum capacity fo r th e new, o rigina l equip ­
me nt t ires that were on yo ur vehicl e at th e time it wa s manuf actured .
For the location of t he label ~
page 295, fig. 212.
M ost t ires lose air natura lly ove r time. T hey c an also lose some air if
you d rive over a potho le or hit a curb while pa rking . It is usually not
poss ible to see whether the radia l ti res used today are unde rinflate d
just by loo king at them .
T he refore, be sure to check t ire pressures at least once a month and
alw ay s before go ing on a lo ng trip. Make sure to take the num ber of
people and the amount of luggage into account whe n ad justing tire .,.
Vehicle care Technical data

-Tires and wheels
in. WARNING
Overloading a vehicle can cause loss of vehicle control, a crash or
other accident, serious personal injury, and even death.
• Carrying more weight than your vehicle was designed to carry
will prevent the vehicle from handling properly and increase 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 suddenly,
including a blowout and sudden deflation, causing loss of control
and a crash.
• Always make sure that the total load being transported -
including the weight of a trailer hitch and the tongue weight of a
loaded trailer -does not make the vehicle heavier than the
vehicle's Gross Vehicle Weight Rating. •
Determining correct load limit
Use the example below to calculate the
total weight of the passengers and luggage
or other things that you plan to transport so
that you can make sure that your vehicle
will not be overloaded.
Steps for Determining Correct
Load Limit
1.Locate the statement "THE COMBINED WEIGHT OF OCCUPANTS AND CARGO
SHOULD NEVER EXCEED XXX KG OR XXX LBS"on your vehicle's placard (tire infla­
tion pressure label)==>
page 295J
fig. 212.
2. Determine the combined weight of the driver and passengers that will be riding
in your vehicle.
3. Subtract the combined weight of the driver and passengers from
"XXX" kilo­
grams or
"XXX" pounds shown on the
sticker==>
page 295J fig. 212.
4. The resulting figure equals the available amount of cargo and luggage load
capacity. For example, if the
"XXX"
amount equals 1400 lbs. and there will
be five 150 lbs. passengers in your
vehicle, the amount of available cargo
and luggage load capacity is 650 lbs. (1400- 7 SQ (5
X 150) = 650 lbs.) ~

-~_T_ i_ re _ s_ a_n _ d_ w_ h _e_ e_ ls _________________________________________________ _
Tire pressure
Incorrect tire pressure causes premature wea r a nd can cause sudden
t ire blow-out. For this reason, ti re p ressure must be checked at least
once a month ~
page 297.
Driving style
Driving fast around curves, heavy acce le ra tion and hard brak ing
increase tire wear .
Rotating tires for more even wear
For all four tires on your veh icle to have the same service life, we
re commend that the fron t and re a r tires are rotate d according to the
tire manufact urer's suggested tire rotation interva ls . Please
remember the fo llow ing:
• Tir e rotat ion inte rvals may differ from t he ve hicl e service intervals
outlined in your Maintenance and War ranty Booklet .
• T he longer one tire is used in one location on the veh icle, the more
it wears at certa in points; therefore, we recommend that you follow
t he t ire m anufac ture r's suggested tire rotation in terva ls.
• V ehicles with front-whee l drive expe rience mo re tread wea r on t he
fron t wheels compa red to all-whee l drive (quattro
® ).
• Please rotate tires as s hown ~fig. 215.
• Extra care must be taken when rotating d irection-specific tires
~ page 321.
Wheel balancing
The w heels on new vehicles are balanced. Howeve r, va rious sit uat io ns
dur ing eve ryday dr iv ing can cause them to become unbalanced,
re su lt ing in v ibr ations yo u can usually fee l throug h the steering
wheel.
Unbalanced wheels must be rebalanced to avoid excessive wea r on
steeri ng, suspension and t ires . A wheel must also be rebalanced
w hen a new tire is installed.
Incorrect wheel alignment
Incorrec t whee l alignment can ca use excessive tire wear, impai ring
t he sa fety of the veh icle . If tires show excess ive wear, have the wheel
alignment checked by an authorized A udi dealer or qualified wo rk­
shop .
All wheel drive
Vehicles w ith q uattro ® must always have ti res of the same size,
const ructio n and trea d type. For details see~
page 242 .
& WARNING
Sudden tire failure can lead to loss of control , a crash and serious
personal injury!
• Never drive a vehicle when the tread on any tire is worn down
to the wea r ind icato rs.
• Worn tire s are a safety hazard, they do not grip well on wet
roads and in crease your risk of "hydroplaning" and lo ss of control.
• Always keep chemicals that can cause tire damage, such as
grease , oil , gasoline and brake fluid away from tires.
• Tires age even if they are not being used and can fail suddenly,
especially at high speeds . Tires that are more than 6 years old can
only be used in an emergency and then with special care and at
lower speeds.
• Never mount used tire s on your vehicle if you are not sure of
their "previous history ." Old used tires may have been damaged
even though the damage cannot be seen that can lead to sudden
tire failure and loss of vehicle control. •

-~_T_ i_ re _ s_ a_n _ d_ w_ h _e_ e_ ls _________________________________________________ _
& WARNING (conti nu ed )
• If you install wheel trim disc s on the vehicle wheels , make sure
that the air flow to the brakes is not blocked . Reduced airflow to
the brakes can them to ove rhe at, increasing stopping distances
and cau sing a collision .
0 Note
• For tech nical reasons, it is not ge ne rally poss ib le to use the wheel
r ims from other vehicles. This can hold true for whee ls of the same
veh icle type.
• If the spare tire is different from the t ires that you have mounted
on yo ur veh icle (for examp le w inte r tir es or wide profile tires), then
use the spare tire for a short per iod of t ime on ly and drive with extra
c are . Replace the fla t ti re wi th t he tire matc hing the o thers on you r
vehicle as soon as possible .
• If you should put differen t wheel s and tires o n yo ur vehicle (e.g.
w inter whee ls and t ires), you must be certa in that the wheels and
ti res are comp atib le with the t ire pressure mon ito ring system*.
Otherwise the system will register a malfu nction and a fau lt message
w ill be displ ayed. Fo r more informa tion, conta ct your au thori zed Au di
dealer.
• N ever drive wi tho ut the valve s tem cap. The valves co uld get
damaged .
Dispose of old t ires in accordance with the loca l requirements. •
Uniform tire quality grading
• Tread wear
• Tr act io n AA A B C
• T emperature A B C Quality grades can be fo
und where app licab le on the tire s ide wall
betwee n tre ad sho uld er and m aximum se ct io n width =>
page 3 03,
fig .216.
Fo r example : Tread wea r 200, Tract ion AA , Temperat ure A.
All passenge r car ti res mus t confo rm to Fe d er al Safety Requireme nts
in addition to these grades.
Tread wear
T he tread wear grade is a comparative rating based on the wear rate
of the t ire whe n tes ted under cont rolle d conditions on a specifie d
government test co urse.
F or example, a tire graded 150 would wear one a nd one hal f (1 1/2)
t imes as well on t he government course as a tire graded 100 .
The relat ive performance o f tires depen ds upon the act ua l conditions
of their use, however, and may de pa rt sign ifican tly from the no rm
due to variat ions in dr iv ing hab its, se rvice practices and differences in
ro ad characte ris tic s and climat e.
Traction
Th e traction grades, from high est to lowest, ar e AA, A, Band C. Those
grades represent the tire's ability to stop on wet pavement as
me asu red under con trolled conditions on spe cifie d gove rnme nt te st
surfaces of asphalt and conc rete . A tire marked C may have poo r trac­
ti on perfo rm an ce =>& .
Temperature
The temperature grades a re A (the h ig hest), B, and C, represen ting
the t ire's resistance to the generation of heat and its ab ility to d issi ­
p ate he at when teste d und er co ntro lled condition s on a s pecifie d
indoor laboratory test wheel.
Susta ined high tempera ture can cause the materi al of the tire to
degenerate and red uce tire life, and excessive te mperature ca n lead
to sudden tire failure=> & .
Th e g ra d e C c orresponds to a level of pe rforman ce which all
passenge r ca r tires must meet under the Federal Motor Veh icle