brake AUDI A6 2016 Workshop Manual

-Do not remove the engine cover under any
circumstances. This increases the risk of
burns.
- If work on the fuel system or the electrical
system is necessary:
- Always d isconnect the battery.
- Never smoke or work near heaters or open
flames. Flu ids in the engine compartment
could start a fire.
- Keep an app roved fire ext inguisher imme­
d iate ly availab le.
- To avo id electr ical shock and personal injury
wh ile the eng ine 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 repa ir with
the engine running:
- First, fully apply the parking brake, move
selector lever to P (Park) .
- Always use extreme caution to prevent
cloth ing, jewelry, or long hair from get­
ting caught in the radiator fan, V-belts or
other mov ing parts, or from contacting
hot parts. Tie back ha ir before starti ng,
and do not wear clothi ng that will hang or
d roop into t he engine.
- Min imize exposu re to emission and chem i­
cal hazards¢ .&.-
_& WARNING
California Proposition 65 Warn ing:
- E ngine exhaust, some of its constituents,
and certain vehicle components contain or
em it chem ica ls known to the St ate of C ali­
f orn ia to cause cancer and bi rth de fects and
reproductive harm . In addition, certain flu­
ids contained in ve hicles and certain prod­
ucts of component wear contain or emit
Ch eck ing and Filling
chemicals known to the State of California
to cause cancer and birth defects or other
reproductive harm.
- Battery posts, term inals and related acces­
sories contain lead and lead compounds,
chemicals known to the State of Californ ia
to cause cancer and reproductive harms.
Was h hands afte r handling .
([) Note
When adding flu ids, always make sure that
they are poured into the proper co nta iner or
fille r opening, otherwise serious damage to
vehicle systems w ill occur.
® For the sake of the environment
To detect leaks in time, inspect the veh icle
floor pan from unde rneath regularly. If you
see spots from oil or other veh icle fluids, have
your vehicle inspected by an authorized Audi
dealer.
Closing the engine hood
.,.. Pull the hood down un til the press ure from the
struts is reduced.
.,.. Let the hood
drop down and latch in p lace . Do
not try to push it shut;
it may fail to engage
¢ _& .
_& WARNING
--A hood that is not completely latched co uld
fly up and block your view while driv ing.
- When you close the engine hood, check it to
make sure the safety catch has properly en­
gaged . The hood s hou ld be flush with the
sur rounding vehicle body parts.
- If you notice while driv ing that the hood is
not secured properly, stop at once and close
it.
-
217

Checking and Filling
Engine compartment
Engine compartment overview
These are the most important items that you can check.
Fig. 186 Typical layout for containers and eng ine oil fille r cap
screw . . . . . . . . . . . . . . . . . . . . . . . 228, 264
@ Jump start point(+) under a co ver
® Brake fluid reservoir ((0}) ...... .
@ Eng ine oil filler cap ('t::r.) ...... .
® Coolant expansion tank (-t) .... .
@ Windshield/headlight washer con -
t . (ffi) amer ~ ..................
. 228,264
225
220
222
229
The engine oil filler neck (item@) may be locat­
ed in a different area depending on the version of
the engine.
A WARNING
Before you check anything in the engine com­
partment, always read and heed all WARN­
INGS ~.&.
in Working in the engine compart­
ment on page 216.
218
Engine oil specifications
The engine oil used must conform to exact speci­
fications.
The serv ice interval display in the instrument
cluster of your vehicle will inform you when it is
time for an oi l chang e. We recommend that you
have your oil changed by an authorized Audi Serv­
i ce Advisor.
If you have to top off the oil between oil changes,
us e the Audi oil quality standard specified in the
ta ble.
~

.... N
0 CJ ' M I.Cl ......
Brake fluid
Checking brake fluid level
Fig. 190 Engine compartment : cover on t he brake fluid
reservoir
N
N
-N ,::
~
Before you check anything in the engine compart­
ment,
always read and heed all WARNINGS
¢ A in Working in the engine compartment on
page 216.
.,. Read the brake fluid level from the brake fluid
reservoir
¢fig. 190, ¢page 218, fig. 186. The
brake fluid level must be between the "MIN "
and "MAX" markings.
The location of the brake fluid reservoir can be
seen in the engine compartment illustration
¢page 218.
The fluid level may drop slightly after some time
due to the automatic adjustment of the brake
pads. This is not cause for alarm.
If the brake fluid level falls
considerably below
the "MIN" mark, the brake warning/indicator
light
1111 (U.S. models) ;II (Canadian models)
will come on¢
page 14. Do not continue to oper­
ate the vehicle. The complete brake system
should be thoroughly checked by an authorized
Audi dealer or other qualified facility and the
cause corrected. If the brake fluid level is too
low, the brake warning/indicator light will illumi ­
nate. Contact an authorized Audi dealer
immedi­
ately.
Checking and Filling
Changing brake fluid
Have the brake fluid changed by an experienced
technician .
Brake fluid absorbs moisture from the air. If the
water content in the brake fluid is too high, cor­
rosion in the brake system may result after ape ­
riod of time . The boiling point of the brake fluid
will also decrease considerably and decrease
braking performance.
Therefore, the brake fluid must be changed
every
two years . Always use new brake fluid which con­
forms to Federal Motor Vehicle Standard "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.
A WARNING
- Brake fluid is poisonous. It must be stored
only in the closed original container out of
the reach of children!
- Brake failure can result from old or inappro­
priate brake fluid . Observe these precau­
tions:
- Use only brake fluid that meets SAE speci­
fication
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 indi­
cated 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.
(D Note
Brake fluid will damage the paint of your vehi-
cle.
IJ>
225

Check ing and F illing
@ For the sake of the environment
Because of the prob lem of proper disposal of
brake fluid as we ll as the special tools re­
quired and the necessary expertise, we rec ­
ommend that you have the b rake 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.
W ith
high outside temperat ures or long da ily
drives we recommend that you have the electro­
lyte level checked by a service fac ility . The elec­
trolyte level should also be chec ked eac h time
the battery is charged ¢
page 228 .
Have the battery checked when you take your ve­
h icle in for service. You a re well advised to re­
p lace a battery t hat is o lder than S years .
W ith certain types of a irbag dep loyment, the
battery is disconnected from the vehicle electr i­
cal system for safety reasons
¢ &. in Repair, care
and disposal of the airbags on page 157 .
Disconnecting the battery terminal s
Some vehicle functions (power window reg ula­
tors, for example) are lost i f th e battery termi ­
na ls are disconnected. These functions have to be
relearned after the battery termina ls are con­
nected aga in. To prevent th is , the batte ry shou ld
only be disconnected from the vehicle e lectr ica l
sys te m when abso lutely ne cessary for repairs.
Vehicles not driven for long periods
If you do not drive your vehicle over a period of
seve ral days or weeks, electrical components a re
gradua lly cut back or sw itched off . T hi s reduces
e n ergy cons umption and ma inta ins starti ng ca­
pab il ity over a longer pe riod
¢ page 192. Some
of the conve nience f unct io ns may not o pera te,
such as the inter io r lig hts or powe r seat a dju st­
ment . The convenience funct ions wi ll be avai lab le
again when you switch on the ignition and start
the engine.
226
Winter operation
Dur ing the winte r mon ths, ba ttery c apacity tends
to decrease as tempe ra tu res drop . This is be ­
ca use mo re power is also consume d while start ­
i ng, and the headlights, rear window defogger,
etc., are used more often.
Avo id unne cessary powe r consum ption, pa rticu­
l arly in city traffic or when traveling on ly short
distances . Let your author ized Audi dealer check
t h e capacity of the vehicle battery before winter
sets in~
page 228. A we ll charged battery will
not only p reve nt sta rting prob lems when the
weather is cold, but will also last longer.
(D Tips
If yo ur vehicle is left standing for several
weeks at extreme ly low temperatu res, the ve­
hicl e battery should be re m oved a nd stor ed
where it will not freeze. This w ill preven t it
fro m bei ng damaged and hav ing to be re­
p lac ed .
Working on the battery
Be e specially car eful when working on or near
t he bat tery.
The battery is loca ted in the luggage com part­
ment under the floo r. Befo re yo u check anything
i n the luggage compa rtment,
read and heed all
WARNINGS ¢
.cl·
Always heed the safety warnings , when working
o n the vehicle ba tte ry o r the veh icle elect rical
system to p reve nt injury.
The following WARNINGS are very important
when working on the battery:
Always heed the following WARNING SYM·
BOLS and safety precautions when working on
the battery.
®
Always wear eye protection.
A
Battery acid contains sulfuric acid . Al-
ways wear gloves and eye protection.

® Mud and snow capability
"M/5" or "M+S" indicates the tire
has characteristics that make it
suitable for driving on mud and
snow .
& indicates a winter tire .
@ Composition of the tire cord
and materials
The number of plies indicates the
number of rubber ized fabric lay­
ers in the t ire. In general : the
more layers, the more weight a
tire can carry . Tire manufacturers
must also specify the materials
used in the ti re . These incl ude
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¢
page 248.
@ Running direction
The arrows indicate the running
direction of unidirectional t ires .
You must always follow the speci- fied running direction
¢
page 258.
€3) Maximum permitted
inflation pressure
Wheels
This number indicates the max i­
mum pressure to which a tire can
be inflated unde r normal operat­
ing conditions.
Glossary of tire and loading
terminology
Accessory weight
means the combined we ight (in
excess of those standard items
wh ich 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 w idth 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 . .,.
233

(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight, and
(d) Production options we ight
Ma ximum (permissible)
inflation pressure
means the maximum cold infla­
tion pressure to which a t ire may
be inflated. Also called "maxi ­
mum inflation pressure."
Normal occupant weight
means 150 lbs. (68 kilograms)
times the number of occupants
seated in the veh icle up to the to­
tal seating capacity of your vehi­ c le.
Occupant distribution
means distribution of occupants
in a vehicle.
Outer diameter
means the overall diameter of an
inflated new tire.
Overall width
means the linear distance be­
tween the exteriors of the side­
walls of an inflated tire, including elevations due to labeling, deco ­
rations, or protective bands or
ribs .
Wheels
Ply
means a layer of rubber-coated
parallel cords .
Production options weight
means the combined weight of
those installed regular production
options weighing over 5 lbs. (2.3 kg) in excess of those standard
items which they replace, not pre­
viously considered in curb weight
or accessory weight, including heavy duty brakes , ride levelers,
roof rack, heavy duty battery, and
special trim .
Radial ply tire
means a pneumatic tire in which
the ply cords that extend to the beads are laid at substantially 90
degrees to the centerline of the
tread.
Recommended inflation
pressure
see ~ page 234, Cold tire infla­
tion pressure .
Reinforced tire
means a tire designed to operate
at higher loads and at higher in­
flation pressures than the corre­ sponding standard tire. Rein ­
forced tires may be identified as
235

different tire speeds. For this rea­son, in case of emergency, only
use a spare tire* that is the same
circumference as the regular
tires.
&_ WARNING -
-Only use tire/rim combina­ tions 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.
Wheels
-Only use tires that are more
than 6 years old when abso­ lutely necessary and drive
carefully when doing so.
-Do not use run-flat tires on
your vehicle. Using them when
not permitted can lead to ve­
hicle damage or accidents.
- If you install wheel covers on
the vehicle, make sure they al­ low enough air circulation to
cool the brake system. If they
do not, this could increase the
risk of an accident.
Tire wear/damage
Fig. 194 Ti re profi le: T readwear 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. .,.
239

Wheels
Your safety and that of your pas­
sengers also depends on making
sure that load limits are not ex­
ceeded. Vehicle load includes ev­
erybody and everything in and on
the vehicle. These load limits are
technically referred to as the vehi­
cle's
Gross Vehicle Weight Rat­
ing
("GVWR") .
The "GVWR" includes the weight of the basic vehicle, all factory in­
stalled accessories, a full tank of
fuel, oil, coolant and other fluids
plus maximum load . The maxi­
mum load includes the number of
passengers that the vehicle is in­
tended to carry ("seating capaci­
ty") with an assumed weight of 1 SO 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-
244
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
driver's side B-pillar
¢ page 241,
fig. 195.
&_ 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 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.

-The spare tire is intended on ly for tempora­
ry and short-term use. It shou ld be replaced
as soon as possible with the normal wheel
and t ire.
- After mounting the compact spare tire, the
tire pressure must be checked as soon as
poss ible. The t ire pressure of the compact
spare tire m ust be 4.2 bar; otherwise, you
risk having an accident.
- Do not drive faster than SO mph (80 km/h).
You risk hav ing an accident .
-Avoid full-throttle accelerat ion, heavy brak­
ing, and fast cornering . You risk having an
acc ident.
- Never drive us ing more than one spare
wheel and tire . You risk having an acc ident.
- Normal summer or winter tires must not be
mounted on the compact spare wheel rim .
- For technical reasons, the use of tire chains
on the spare tire is not perm itted. If it is
necessary to drive with t ire chains, the spare
wheel m ust be mounted on the front axle i n
the even t of a flat in a rea r tire. The new ly
avail able front wheel m ust then be insta lled
in place of the rear wheel with the flat tire .
Installing the tire chain before mounting
the wheel and tire is recommended .
- Loose items in the passenger compartment
can cause ser ious personal injury during
hard braking or in an acc ident. Never store
the inflatable spare t ire or jack and too ls in
the passenger 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 tire failure , pull the car
well away from moving t raff ic and try to reach
level ground before you stop¢ A-
• All passengers sho uld leave the car and move
to a safe location (fo r instance, be hind the
guardrail) ¢
A.
• Engage the parking b rake to prevent yo ur vehi­
cle from roll ing unintentionally ¢
A-
Em ergenc y ass is tanc e
• Move selecto r lever t o po sit ion P ¢ A .
• If you are towing a trai ler, unhitch the trailer
from yo ur vehicle .
• Take the
jack and the spare tire out of the lug­
gage compartment
¢page 251, ¢page 252.
A WARNING
You or your passengers could be injured while
changing a whee l if you do no t follow these
safety precaut ions:
- If you have a flat tire, move a safe distance
off the road. Turn off the eng ine, turn the
emergency f lashers on a nd use other wa rn­
ing devices to alert other motorists.
- Make sure that passenge rs wait i n a safe
p la ce away from the vehicle and well away
fr om the road and t raff ic.
- To help preven t the veh icle from moving
suddenly and possib ly slipping off the ja ck,
always fu lly set the park ing brake and bloc k
the wheel diagonally opposite the wheel be­ ing changed. When one front whee l is lifted
off the ground, placing the Automatic
Transmission in P (Park) wi ll
not prevent the
veh icle from moving.
- Before you change a wheel, be sure the
ground is level and firm. If necessary, use a
sturdy board under the jack.
- Always store the vehicle tool kit, the jack
and the replaced tire in the luggage com­
partment
¢ page 131.
(!) Tips
Before changing the wheel, you must activate
the jacking mode, so that the automat ic con­
tro ls for the Adaptive Air Suspension* do not
make it more difficult to lift the vehicle with
the jack ¢
page 255.
Changing a wheel
When you change a wheel , follow the sequence
described below step -by -step and in exactly that
order .
l. Activate the vehicle jack mode*¢ page 255. .,.
253

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cover must be flush with the surface of the sill
extension.
(D T ips
Some mode ls may also have a cover for the
rear vehicle lift point .
Taking the wheel off/installing the spare
Follow these instructions step-by-step for chang­
ing the wheel.
Fig. 208 C hangin g a whee l: u sin g t he screwdrive r ha ndle
(wi th the b lade removed) to turn t he bo lts
F ig. 20 9 Ch an gin g a wheel: alignmen t pin insid e th e top
ho le
After you have loosened all wheel bol ts and
raised the vehicle off the ground, remove and re ­
place the whee l as fo llows:
Remo ving the wheel
• Use the he xagon al socket in the sc rewd river
ha ndle
to completely remove the topmost
wheel bolt and set it aside on a
clean surface
Q fig . 208.
• Screw the threaded end of the alignmen t pin
from the tool kit hand-tight into the empty bolt
hole
Q fig. 209 .
• Then remove the other whee l bolts as described
above .
Emergen cy a ssis tanc e
•Takeoff the whee l leaving the alignment pin in
the bolt hol e
Q0.
Putting on th e spare whe el
• Lift the spare whee l and carefu lly slide it over
t he alignment p in to g uide it in place
Q 0.
• Use the hexagonal socket in the screwdr iver
handle to screw in and tighten all wheel bolts
slightly .
.. Remove the alignment pin and insert and tight­
en the remaining wheel bol t slight ly like the
rest.
• Turn the jack handle counter -clockw ise to lower
the vehicle unt il the jack is fully released .
• Use the wheel bo lt wrench to t ighten a ll wheel
bolts firmly
9 page 255. Tighten them cross­
wise,
from one bo lt to the ( approx imately) op­
posite one, to keep the wheel centered.
(D Note
When removing o r installing the wheel, the
rim co uld h it the brake rotor and damage t he
rotor . Work carefully and have a second per ­
son help you .
@ Tips
Never use the he xagonal socke t in the hand le
of the sc rewdriver to loosen or t ighten the
whee l bolts.
- Pull the reversible blade from the screwdr iv­
er before you use the hexagona l socket in
the handle to t urn the whee l bolts .
- When mount ing tires with
unidirectional
tread design
make sure the tread pattern is
pointed the right way
Q page 258.
- T he wheel bolts shou ld 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.
257