2014 AUDI A7 brake

Groove
means the space between two adjacent tread
ribs.
Load rating (code)
means the maximum load that a tire is rated
to carry for a given inflation pressure. You
may not find this information on all tires be­
cause it is no t req uired by law.
Maximum load rating
means the load rating for a t ire at the max i­
mum permissible inflation pressure for that
tire.
Maximum loaded vehicle weight
means the sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight, and
(d) Production options weight
Maximum (permissible) inflation pressure
means the maximum cold inflation pressure
to which a tire may be inflated. Also called "maximum inflation pressure."
Normal occupant weight
means 150 lbs. (68 kilograms) times the
number of occupants seated in the vehicle up
to the total seating capacity of your vehicle.
Occupant distribution
means distribution of occupants in a vehicle.
Outer diameter
means the overa ll diamete r of an inflated new
tire.
Overall width
means the linear distance between the exteri­
ors of the sidewalls of an inflated tire, includ ­
in g elevations due to labeling, decorations, or
protective bands or ribs.
Ply
means a layer of rubber-coated parallel cords.
Tires and wheels 245
Production options weight
means the combined weight of those installed
regular production options we ighing over 5
lbs. (2.3 kg) in excess of those standard items
which they replace, not previously considered
in curb weight or accessory weight, including
heavy duty brakes, ride levelers, roof rack,
heavy duty battery, and spec ial tr im .
Radial ply tire
means a pneumatic tire in which the ply cords
that extend to the beads are laid at substan­
tia lly 90 degrees to the center line of the
tread .
Recommended inflation pressure
see ¢ page 244, Cold tire inflation pressure.
Reinforced tire
means a t ire design to operate at higher loads
and at h igher inflation pressures than the cor­
re sp onding standard tire. Reinforced tires
may be identified as "XL", "xl", "EXTRA LOAD",
or "RF" on the sidewa ll.
Rim
means a metal support for a tire or a t ire and
tube assembly upon which the tire beads are
seated.
Rim diameter
means nom inal diameter of the bead seat. If
you change your wheel s ize, you will have to
purchase new tires to match the new rim di­
ameter.
Rim size designation
means r im diameter and width .
Rim width
means nominal distance between rim flanges .
Sidewall
means that portion of a tire between the
tread and bead.
•
•

252 Tires and wheels
the vehicle can carry. For the location of the
label
c::> page 247, fig. 200.
A WARNING
Overloading a vehicle can cause loss of ve­
hicle control, a crash or other accident, se­
rious personal 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 con­
trol.
- 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 overload ­
ed can fail suddenly, including a blowout
and sudden deflation, causing loss of
control and a crash.
-Always make sure that the total load be­
ing transported -including the weight of
a trailer hitch and the tongue weight of a
loaded trailer -does not make the vehi­
cle heavier than the vehicle's Gross Vehi­
cle Weight Rating.
Determining correct load limit
Use the example below to cal­
culate the total weight of the
passengers and luggage or oth­
er things that you plan to trans­
port 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 OC­
CUPANTS AND CARGO
SHOULD NEVER EXCEED XXX KG OR XXX LBS" on your ve­
hicle's placard (tire inflation
pressure
label)¢
page 247,
fig. 200.
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 247, fig. 200.
4. The resulting figure equals the available amount of car­
go and luggage load capaci­
ty. For example, if the "XXX"
amount equals 1400 lbs.
and there will be five 150
lbs. passengers in your vehi­
cle, the amount of available
cargo and luggage load ca­ pacity is 650 lbs. (1400-7 50
(5
X 150) = 650 lbs.)
5. Determine the combined weight of luggage and cargo being loaded on the vehicle.
That weight may not safely
exceed the available cargo
and luggage load capacity
calculated in Step 4.

254 Tires and wheels
Unbalanced wheels must be rebalanced to
avoid excessive wear on steering, suspension
and tires. A wheel must also be rebalanced
when a new tire is installed .
Incorrect wheel alignment
Incorrect wheel alignment can cause exces­
sive tire wear, impairing the safety of the vehi­
cle. If tires show excessive wear, have the
wheel alignment checked by an authorized Audi dealer or qualified workshop.
All-wheel drive
Vehicles with quattro must always have tires
of the same size, construction and tread type .
For details see
~page 201.
A WARNING
Sudden tire failure can lead to loss of con­
trol, a crash and serious personal injury!
- Never drive a vehicle when the tread on
any tire is worn down to the wear indica­
tors.
- Worn tires are a safety hazard, they do
not grip well on wet roads and increase
your risk of"hydroplaning" and loss of control.
- Always keep chemicals that can cause
tire damage, such as grease, oil, gasoline
and brake fluid away from t ires.
- 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 tires on your vehicle if
yo u are not sure of their "previous histo­
ry." Old used tires may have been dam­
aged even though the damage cannot be
seen that can lead to sudden tire failure
and loss of vehicle control.
New tires and replacing tires and wheels
New tires and wheels have to be broken in .
Fig. 204 Tire specificat ion codes on the s idewall of a
tire
No. Description
@ Nominal w idth of tire in millimeters
® Ratio of height to width (aspect ratio)
© Radial
® Rim diameter code
® L oad index and speed rating
(J) U.S . DOT tire identification number
® Audi Original tire
® Sever snow conditions
@ Tire ply composition and materials
used
@ Maximum load rating
@ Treadwear, traction and temperature
grades
@ Maximum permissible inflation pres-
sure
The tires and rims are essential parts of the
vehicle 's design . The tires and rims approved
by Audi are spec ially matched to the charac­
teristics of the vehicle and can make a major .,..

Driving with different tires reduces vehi­
cle handling and can lead to a loss of
control.
- If the spare tire is not the same as the
tires that are mounted on the vehicle -
for example with winter tires -only use
the spare tire for a short period of time and drive with extra care. Refit the nor­
mal road wheel as soon as safely possi­
ble.
- Never drive faster than the maximum
speed for which the tires on your vehicle
are rated because tires that are driven
faster than their rated speed can fail
suddenly.
- Overloading tires cause heat build-up,
sudden tire failure, including a blowout
and sudden deflation and loss of control.
- Temperature grades apply to tires that
are properly inflated and not over or un­
deri nflated.
- For technical reasons it is not always
possible to use wheels from other
vehicles -in some cases not even wheels
from the same vehicle model.
- If you install wheel trim discs on the ve­
hicle wheels, make sure that the air flow
to the brakes is not blocked. Reduced air­
flow to the brakes can them to overheat, increasing stopping distances and caus­
ing a collision.
- Run flat tires may only be used on
vehicles that were equipped with them at the factory . The vehicle must have a
chassis designed for run flat tires. Incor­
rect use of run flat tires can lead to vehi­
cle damage or accidents. Check with an
authorized Audi dealer or tire specialist
to see if your vehicle can be equipped
with run flat tires. If run flat tires are used, they must be installed on all four
wheels. Mixing tire types is not permit­
ted.
(D Note
- For technical reasons, it is not generally
possible to use the wheel rims from oth-
Tires and wheels 257
er vehicles. This can hold true for wheels
of the same vehicle type.
- If the spare tire is different from the
tires that you have mounted on your ve­
hicle (for example winter tires or wide
profile tires), then use the spare tire for a
short period of time only and drive with
extra care. Replace the flat tire with the
tire matching the others on your vehicle
as soon as possible.
- Never drive without the valve stem cap .
The valves could get damaged .
(® For the sake of the environment
Dispose of old tires in accordance with the
local requirements.
Uniform tire quality grading
-Tread wear
- Tract ion AA A B C
- Temperature AB C
Quality grades can be found where applicable
on the tire side wall between tread shoulder
and maximum section width
c;, page 254,
fig. 204.
For example: Tread wear 200, Traction AA,
Temperature A.
All passenger car tires must conform to Feder­
al Safety Requirements in addition to these
grades.
Tread wear
The tread wear grade is a comparative rating
based on the wear rate of the tire when tested
under controlled conditions on a specified
government test course.
For example, a tire graded ISO would wear
one and one half (11/2) times as well on the
government course as a tire graded 100.
The relative performance of tires depends upon the actual conditions of their use, how­
ever, and may depart significantly from the
norm due to variations in driving habits, serv­
ice practices and differences in road character-
istics and climate.
ll-
•
•

260 Tire s and wheel s
chains because the vehicle will be ex­
tremely low. If you do drive with snow
chains on while the vehicle is at this lev­
el, the snow chains might severe ly dam­
age the wheelhouse and other parts of
the veh icle.
(D} Tips
Where snow chains are mandatory oncer­
tain roads, this normally also applies to
veh icles with all-wheel dr ive.
Wheel bolts
Wheel bolts must always be tightened to the
correct torque .
The design of whee l bolts is matched to the
factory installed r ims. If different rims
are fit­
ted, the correct wheel bolts with the right length and correctly shaped bolt heads must
be used. This ensures that wheels are fitted
secure ly and that the brake system functions
correctly .
In certain circumstances, you may not use
wheel bolts from a different vehicle -even if it
is the same mode l
¢page 287.
_& WARNING
Imprope rly tig htened o r maintained whee l
bolts can be come loose ca using loss of
contro l, a co llision and serious persona l in­
jury.
- Always keep the wheel bol ts an d the
threads in the wheel hubs clea n so the
wheel bolts can tu rn easily and be prop­
er ly tightened .
- Never grease or oil the wheel bo lts and
the threads in the wheel h ubs. They can
become loose w hile driving if greased or
oiled, even if tightened to the specif ied
torque.
- Only use wheel bolts that belong to the rim being installed.
- Never use different whee ls bolts on your
vehicle.
- Always maintain the correct tighten ing
torq ue for the wheel bo lts to reduce the risk of a whee
l loss. If the tightening tor­
que of the wheel bolts is too low, they
can loosen and come out when the vehi­
cle is mov ing. If the tighte ning torque is
too high, the wheel bolts a nd threads
can be damaged and the whee l can be­
come loose.
([) Note
The specified torque for the whee l bolts is
90 ft lb (120 Nm) with a tolerance of± 7,4
ft lb(± 10 Nm). Torque whee l bolts diago­
nally. Afte r changing a whee l, the torque
must be checked as soon as possible wi th a
torque wrench -pre ferably by an au thor­
ized Audi dealer or qualified workshop .
Low aspect ratio tires
Your Audi is factory-equipped with low aspect
ratio tires. These tires have been thoro ughly
tested and been se lected specifically for your
model for their superb performance, road fee l
and hand ling u nder a var iety of d riv ing condi ­
t ions . As k your author ized Audi dealer for
more details.
The low aspect ratio of these tires is ind icated
by a numeral of
55 or less in the tire's s ize
designation . The numeral rep resents the ratio
of the t ire's s idewa ll height in relation to its
t read width ex pressed in percentage. Conven­
t iona l tires have a he igh t/w idth rat io of 60 or
more.
The performanc e of low -a sp ec t-ratio tires i s
pa rticularly sensitive to improper inflation
pre ssure . It is therefore important that low
a spect ratio tires are inflated to the specified
pre ssure and that the inflation pressure i s
regularly checked and maintained. Tire pre s­
sures should be checked at least once a month and always befo re a long trip
¢ page 249, Checking tire pressure .
What you can do to avoid tire and rim
damage
Low aspect ratio tires can be damaged more
easily by impact w ith potholes, curbs, gull ies .,..

266 What do I do now?
Changing a wheel
Before changing a wheel
Observe the following precautions for your
own and your passenger's safety when chang ­
ing a wheel .
... After you experience a tire failure, pull the
car well away from moving traffic and try to
reach
level ground before you stop o ,&.
... All passengers should leave the car and
move to a safe location (for instance, behind
the guardrail)
o A-
.. Engage the parking brake to prevent your
vehicle from rolling unintentionally
o ,&.
... Move selector lever to position Po ,& .
• If you are towing a trailer, unhitch the trailer
from your vehicle .
... Take the
jack and the spare tire out of the
luggage compartment
o page 264,
o page265.
A WARNING
You or your passengers could be injured
while changing a wheel if you do not fol­
low these safety precautions:
- If you have a flat tire,
move a safe dis­
tance off the road. Turn off the engine,
turn the emergency flashers on and use
other warning devices to alert other mo­
torists.
- 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
sudden ly and possibly slipping off the
jack, always fully set the parking brake
and block the wheel diagonally opposite
the wheel being changed . When one
front wheel is lifted off the ground, plac­
ing the Automatic Transmission in P
(Park) will
not prevent the vehicle 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
opage 136.
@ Tips
Before changing the whee l, you must acti­
vate the jacking mode, so that the auto­
matic controls for the Adaptive Air Sus­
pension* do not make it more difficult to
lift the vehicle with the jack
o page 268 .
Changing a wheel
When you change a wheel, follow these­
quence described below step-by-step and in
exactly that order.
l. Activate the vehicle jack mode*
opage 268 .
2. Remove the decorative wheel cover* . For
more details see also
o page 267, Deco­
rative wheel covers
or o page 267,
Wheels with wheel bolt caps.
3. Loosen the wheel bolts o page 268.
4. Locate the proper mounting point for the
jack and align the jack below that point
opage 268.
5. Raise the car with the jack o page 268.
6. Remove the wheel with the flat tire and
then install
the spare opage 270.
7. Tighten all wheel bolts lightly .
8.
Lower the vehicle with the jack .
9 . Use the wheel bolt w rench and
firmly
tighten all wheel bolts o page 268.
10. Replace the decorative wheel cover*.
11. Deactivate the vehicle jack mode * in the
MMI:
I CARI function button > (Ca r)* sys­
tems
control button > Servicing & checks
> Air susp.: jack mode > Off.
The vehicle jack mode* switches off automati­
ca lly at speeds above 6 mph (10 km/h) .
A WARNING ,-
Always read and follow all WARNINGS and
in format ion
o .&. in Raising the vehicle on
page 269
and opage 271.

268 What do I do now ?
loosening and tightening the wheel
bolts
The wheel bolts must be loosened before rais­
ing the vehicle.
Fig. 212 Changing a wheel: loosening the whee l bo lts
loosening
.. Slide the
w heel wr ench onto the wheel bolt
as far as it will go .
.. Take tight hold of the
end of the wrench
handle and turn the wheel bolts co unte r­
clock w ise about one single turn in the direc­
t ion of arrow
c:> fig. 212 .
Tighten ing
.. Slide the wheel wrench onto the wheel bolt
as far as it will go.
.. Take tight hold of the
end of the wrench
handle and turn each wheel bolt
clock wise
until it is seated.
A WARNING
- Do not use force or hurry when changing
a whee l - you can cause the vehicle to slip
off the jack a nd cause serious persona l
injuries.
- Do not loosen the wheel bolts more than
one turn
before you raise the veh icle with
the jack. - You risk an injury.
@ Tips
- Never use the hexagonal socket in the
handle of the screwdriver to loosen o r
tighten the wheel bo lts.
- If a wheel bolt is very tight, you may fi nd
i t easier to loosen by ca refully p ushi ng
down on the end of the wheel bolt
wrench with
one foot only . As you do so, hold on to the car to keep your balance
and take care not to slip.
Raising the vehicle
The vehicle must be lifted with the jack first
before the wheel can be removed.
Fig. 213 Sill panels: markings
Fig. 2 14 Sill: pos ition ing t he ve hicle jack
.. Activate the vehicle jack mode* in the MMI:
!CARI function button> (Car) * syst ems con­
trol button>
Serv icing & ch eck s> Air su sp .:
ja ck mode > On .
.,. Engage the parki ng brake to prevent your
veh icle from rolling unintentionally .
.,. Move the
sele cto r lever to p osition P .
.. Find the mark ing (imprint) on the sill tha t is
nearest the whee l that will be changed
c:>fig. 213. Be hind the marking, there is a
lifting point on the sill for the vehicle jack.
.. Ve hicles with a si ll: remove the cover from
the sill before lift ing the veh icle w ith a vehi­
cle jack c:>
page 269 .
.,. Turn the ve hicl e ja ck located under the lift­
ing point on the sill to ra ise the jack until its
arm @c:>
fig. 214 is located under the des­
ignated plastic moun t c:>
£ c:> (D .
.. Align the jack so that its arm @c:>
fig. 214
engages in the designated lifting point in
the door sill and the movable base @ lies
IJJ>

272 Fuses and bulbs
Fuses and bulbs
Fuses
Replacing fuses
Fuses that have blown will have metal strips
that have burned through.
Fig. 218 Dr iver side of the cockpit: fuse panel cover
The fuses are located at the front left and
right of the cockpit and behi nd the trim on
the right side of the luggage compartment.
• Switch the ign ition and the affected electri­
c al equ ipment off.
• Check the following table to see which fuse
belongs to the consumer.
• Remove the cover ¢
fig. 218 or¢ page 223,
Opening the side trim.
• To remove the purple plast ic clip if necessa­
ry
ll, hold onto it at the small side and pull
i t out of the fuse panel
c:> page 2 72 ,
fig. 219 .
• Remove the clamp from the rea r side of the
fusecover <>fig.
218.
• Remove the fuse using the cla mp and re­
pla ce the blown fuse w ith an ident ical new
one.
A WARNING
Do not repair fuses and never rep lace a
blown fuse with one that has a higher amp
rating. This can cause damage to the e lec­
trical system and a fi re.
ll You can dis pose of the plastic clip after removing it.
(D Note
If a new fuse burns out again after shortly
have you have installed it, have the electri­
ca l system checked by yo ur authorized
Audi dealer.
(D Tips
- The following table does not list fuse lo ­
cations that are not used .
- Some of the equipment items listed are
optional or only available on certain
model configurations.
Driver side cockpit fuse assignment
Fig . 219 Dr iver side cockpit: fuse pa nel w ith plast ic
bracket
Fuse panel ® (blac k)
No. Equipment Amps
Switch panel, electromechan ica l
1 parking brake, seat heating, 5
starting assist, control module
2 Automatic d imm ing in terior
5 rea rview mirro r, horn
3 Exhaust system (diesel engine) 10