2015 AUDI A7 inflation pressure

252 Tires and wheels
Checking tire pressure
The correct tire pressure for the
tires originally installed on
your vehicle is listed on the tire pressure label located on driv­
er's side 8-pillar.
The recommended tire pres­
sures are on the tire pressure
label and in the table
c::> page 247, Cold tire inflation
pressure. This means that the
pressure must be checked and
adjusted when the tire has not
been driven for more than a
couple of miles (kilometers) at
low speeds during the previous
three hours. Air in the tires ex­
pands when the tire heats up as
a result of internal friction as it
flexes in use . The tire pressure
is higher when the tire has
warmed up than when it is "cold."
It is the inflation pressure in a
"cold" tire that counts. There­
fore, you should never let air
out of a warm tire to match
"Cold tire inflation pressure"
recommendations
c:::> page 247 .
The tires would then be under­
inflated and could fail sudden ­
ly. The tire
pressure label on your
Audi lists the recommended
cold tire inflation pressures at maximum capacity for the new,
original equipment tires that
were on your vehicle at the time
it was manufactured. For the
location of the label
c::> page 247, fig. 200.
Most tires lose air naturally
over time. They can also lose
some air if you drive over a pot­ hole or hit a curb while parking.
It is usually not possible to see
whether the radial tires used
today are underinflated just by
looking at them.
Therefore, be sure to check tire
pressures at least once a month
and always before going on a long trip . Make sure to take the
number of people and the
amount of luggage into ac­ count when adjusting tire pres­
sure for a trip -even one that
you would not consider to be
"long." See
c:::> page 255, Tires
and vehicle load limits for more
important information .
Always use an accurate tire pressure gauge when checking
and adjusting inflation .,.

254 Tires and wheels
forget to check the tire pres-
ure, including a blowout
sure for the spare wheel
and sudden deflation, caus-
¢page 274. ing loss of vehicle control.
When should I adjust the -The driver is responsible for
tire pressures? the correct tire pressures for
Adjust the tire pressure to the all tires on the vehicle. The
applicable pressure values
load you are carrying. After
are located on a sticker on
changing a wheel
or replacing
the driver's side B-pillar.
wheels you have to adjust the
-Only when all tires on the
tire pressures on all wheels. In
vehicle are filled to the car-
addition, you must then store
rect pressure, the tire pres-
the new tire pressures in the
sure monitoring system can
tire pressure monitoring sys-
work correctly.
tern
¢ page 270.
-The use of incorrect tire
A WARNING
-pressure values can lead to
Incorrect tire pressures and/
accidents or other damage.
or underinflation can lead Therefore it is essential that
sudden tire failure, loss of the driver observe the speci-
control, collision, serious per- fied tire pressure values for
sonal injury or even death. the tires and the correct
-When the warning symbol pressures for the function of
[IJ appears in the instru-
the tire pressure monitoring
ment cluster, stop and in-
system.
spect the tires. -Always inflate tires to the
-Incorrect tire pressure and/ recommended and correct
or underinflation can cause tire pressure before driving
increased tire wear and can off.
affect the handling of the -Driving with underinflated
vehicle and stopping ability. tires bend more, letting
-Incorrect tire pressures them get too hot resulting
and/or underinflation can in tread separation, sudden
..
also lead to sudden tire fail-

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 vehi­
cle within a safe distance.
-Tires on a vehicle that has
been overloaded can fail
suddenly, including a blow­
out 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 Rat­
ing .
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.
Tires and wheels 257
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 pas­
sengers from
"XXX" kilo­
grams or
"XXX" pounds
shown on the sticker
¢ page 247, fig. 200.
4. The resulting figure equals the available amount of car­go 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 ""
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'

264 Tires and whee ls
tires because they meet the
h ighest standards regarding
safety and driving characteris ­
tics when used correctly. Your
authorized Audi dealer w ill
g ladly provide you with more
information.
Tire ply composition and materials used
T he number of plies indicates
the number of layers of rubber­
coated fabric in the tire. In gen­
eral, the greater the number of
plies , the more weight a tire
can support . Tire manufactur­
ers also must indicate the ma­
ter ia ls in the tire, wh ich include
steel, nylon, polyester, and oth­
ers .
Maximum Load Rating
This number indicates the max­
imum load in kilograms and
pounds that can be carried by
the tire.
Tire quality grading for
treadwear, traction, and
temperature resistance
Tread wear, trac tion and tem­
perature grades
¢ page 266.
Ma ximum Permissible
Inflation Pressure
T his number is the greatest
amount of air pressure that should ever be put in the tire
under normal driv ing condi­
tions.
A WA RNING
-Using incorrect or unmatch­
ed tires and/ or wheels or improper tire and wheel
combinations can lead to loss of control , collision and
ser ious personal injury.
-Always use tires, rims and
wheel bolts that meet the
specifications of original
factory-installed tires or
other combinations that
have been specifically ap ­
proved by the vehicle manu­
facturer.
- Tires age even if they are
not being used and can fail
sudden ly, especially at high
speeds. Tires that a re more
than 6 years old can on ly be
used in an eme rgency and
then with special care and
at lower speeds.
-Never mount used tires on
your vehicle if you are no t

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Wheel bolts
Wheel bolts must always be tightened to the
correct torque .
The design of wheel bolts is matched to the
factory installed r ims. If differen t rims are fit­
ted, the correct wheel bolts with the right l ength and correctly shaped bolt heads must
be used. This ensures that wheels are fitted
securely and that the brake system functions
correctly .
In certain circumstances, you may not use
wheel bo lts from a different vehicle -eve n if it
i s the same model
~ page 296.
_&. WARNING
Improperly tig htened or maintained whee l
bolts can become loose ca using loss of
contro l, a co llision and serious persona l in­
jury.
- Always keep the wheel bolts and the threads in the wheel hubs clean so the
whee l bolts can turn easily and be prop­
erly t ightened.
- Never grease or oil the wheel bo lts and
the threads in the wheel hubs. They can become loose wh ile driving if greased or
o iled, 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
torque for the wheel bo lts to reduce the
risk of a wheel loss . If the tightening tor ­
que of the wheel bolts is too low, they
can loosen and come out when the vehi­
cl e is moving.
If the tightening torque is
too high, the whee l bolts and threads
can be damaged and the wheel can be­
come loose.
Q;) Note
The spec ified torque fo r the wheel bo lts is
90 ft lb (120 Nm) w ith a toleran ce of± 7,4
ft lb(± 10 Nm). Torque wheel bo lts diago-
Tire s an d wheel s 269
nally . After changing a whee l, the torq ue
must be checked as soon as possible with a
torque wrench -preferably by an author­
i zed Audi dealer or qualif ied workshop.
Low aspect ratio tires
Your Audi is factory-equ ipped w ith low aspect
ratio tires . These tires have been thoroughly
tested and been selected specifically for your model for their superb perfo rmance, road fee l
and hand ling u nder a variety of driving condi­
tions . Ask your au thorized Aud i dealer for
more details .
T he low aspect ratio of these t ires is ind icated
by a numera l of
55 or l ess in the tire's si ze
designation. The n umera l represents the ra tio
of the ti re's sidewall height in relation to its
tread width expressed in percentage . Conven­
tiona l tires have a height/width ratio of 60 or
more.
The perform ance o f low-a spe ct-r atio tire s is
p ar ticul arl y s ens it iv e to imp ro per infl ation
pressur e. It is t herefo re im porta nt t hat low
a spect ratio t ires are inflat ed to the specified
pr essure and that the inflation pressure is
r e gularly checked and ma int ained. Tire pr es­
s ure s should be check ed at lea st on ce a
month and alwa ys befor e a long trip
~ page 252 , Checking tire pressure.
What you c an do to avoid tire and rim
damage
Low aspect ratio tires can be damaged more
easily by impact w it h potholes, curbs, gull ies
o r r idges on the road, pa rtic ularly if the tire is
u nder infla ted .
In order to minimize the occurrence of impact
damage to the tires of your vehicle, we recom­
mend that you observe the following p re ca u­
tions:
- Always ma inta in recommended inflation
p ressures . Check your tire pressu re eve ry
2 ,000 miles (3,000 km) and add air if neces­
sary .
- Dr ive caref ully on roads wi th potholes , deep
gullies o r ridges. The impact from driv ing ..,. •
•

2 70 T ire s and wheel s
through or over such obstacles can damage
your tires. Impact with a curb may also
cause damage to your tires.
- After any impact, immediately inspect your
tires or have them inspected by the nearest
authorized Audi dealer. Rep lace a damaged
t ire as soon as possible.
- Inspect your t ires every 2,000 miles (3,000
km) for damage and wear . Damage is not al­
ways easy to see. Damage can lead to loss of air and underinflation, wh ich could eventu­
ally cause t ire failu re. If you bel ieve that a
t ire may have been damaged, replace the
t ire as soon as possible.
- These tires may wear more quickly than oth­
ers.
- Please also remember that, while these t ires
deliver respons ive handling, they may ride
less comfortably and make mo re no ise than
othe r cho ices .
Reduced performance in winter /co ld
season condition s
All tires are des igned for certain pu rposes.
The low aspect ratio, ultra high pe rformance
tires orig inally installed on your veh icle are in­
tended for maximum dry and wet road per­
formance and handling. They are not suitable for cold, snowy or icy weather conditions. If
you dr ive under those circumstances, you
should equip your vehicle with all-season or
winter tires, which offer better traction under
those cond it ions. We suggest you use the rec­
ommended snow or a ll-season tires specified
for your vehi cle, or their equ ivalent.
Refer to¢
page 267 for more deta iled infor­
mat ion regarding winter tires.
Tire pressure
monitoring system
U) General notes
Each t ire, includ ing the spare (if provided),
should be checked monthly when cold and in­
flated to the inflation pressure recommended by the vehicle manufacture r on the vehicle
p lacard or tire inflation pressure label. (If your vehicle has tires of a diffe
rent size than the
size indicated on the vehicle placard or tire in­
flat ion pressure labe l, you shou ld determ ine
the proper t ire inflation pressure for those
t ires).
As an added safety feature, your ve hicle has
been equipped with a tire pressure monitoring
system (TPMS) that illum inates a low tire
pressure telltale when one or more of your
t ires is significantly under-inflated. According­
ly, when the low tire pressure telltale illumi­
nates, you shou ld stop and check you r tires as
soon as possib le, and inflate them to the
proper p ressu re. Driving on a sig nifican tly u n­
der- inflated t ire causes the tire to overheat
and can lead to tire fai lure . Under-inflation al­
so reduces fuel efficiency and tire tread life,
and may affect the vehicle 's hand ling and
stopp ing ability.
Please note that the TPMS is not a substitute
for proper tire maintenance, and it is the driv­ er's respons ibility to maintain correct tire
pressure, even if under-inflation has not
reached the level to trigger illumination of the
TPMS low tire pressure telltale .
Your vehicle has also been equipped with a
TPMS malfunction indicator to ind icate when
the system is not operating properly. The
TPMS ma lfunction indicator is combined w ith
the low tire pressure telltale . When the sys­
tem detects a malfunction, the telltale will
flash fo r approxima te ly one m inute and then
rema in continuously illum ina ted. This se­
quence will continue upon subsequent vehicle
start-ups as long as the malfunction exists.
When the malfunction indica to r is illum inat­
ed, the system m ay not be ab le to detect or
signal low tire pressure as intended . TPMS
malfunctions may occur for a var iety of rea­
sons, incl uding the insta llation of replace­
ment or alternate tires or wheels on the vehi­
cle that prevent the TPMS from functioning
properly. Always check the TPMS malfunction
telltale after replacing one or more tires or
whee ls on you r vehicle to ensu re that the re­
placement o r alternate ti res and wheels a llow
the TPM S to cont inue to func tion p roperly.

M N <( I.J "". rl I.O
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Tire pressure indicator appears
The tire pressure indicator in the instrument
cluster informs you if the tire pressure is too
low or if there is a system malfunction.
Fig. 205 Display: underinflation warning
Fig. 206 Display: System malfunction
Using the ABS sensors, the tire pressure moni­
toring system compares the tire tread circum­ ference and vibration characteristics of the in­
dividual tires. If the pressure decreases in one
or more tires, this is indicated in the instru­
ment cluster with a warning symbol
rD] and a
message
c:> fig . 205.
The tire pressure monitoring system must be
reset via MMI each time the pressures are ad­
justed (e.g. when switching between partial
and fu ll load pressure) or after changing or re­
placing a tire on your vehicle
c:> page272 . The
TPMS indicator only monitors the tire pres­
sure that you have previously stored. You can
find the recommended tire pressures for your
vehicle on the label on driver's side 8-pillar
c:>page247.
Tire tread circumference and vibration charac­
teristics can change and cause a tire pressure
warning if:
- the tire pressure in one or more tires is too
low,
Tires and wheels 2 71
- the tire has structural damage,
- the tire pressure was changed, wheels rotat-
ed or replaced but the TPMS was not reset
c:>poge272.
- the spare tire* is mounted .
Warning symbols
[I] Loss of pressure in at least one tire¢.& .
Check the tire or tires and replace or repair if
necessary. The indicator light
rD] in the instru­
ment cluster also illuminates <=:>
page 12.
Check/correct the pressures of all four tires
and resetTPMS via MMI.
l!I (Tire Pressure Mon itoring System) Tire
pressure! System malfunction .
Ifljl appears
after switching the ignition on or while driving
¢
fig. 206 and the indicator light rD] in the in­
strument cluster blinks for approximately one
minute and then stays on, there is a system
malfunction. Attempt to store the correct tire
pressure
c:> page 272. If the indicator light
does not turn off or if it turns on shortly
thereafter, immediately drive your vehicle to
an authorized Audi dealer or authorized repair
facility to have the malfunction corrected.
_& WARNING
- If the tire pressure indicator appears in
the instrument cluster display, one or
more of your tires is significantly under­
inflated. Reduce your speed immediately
and avoid any hard steering or braking
maneuvers. Stop as soon as possible and
check the tires and their pressures. In­
flate the tire pressure to the proper pres­
sure as indicated on the vehicle's tire
pressure label<=:>
page 247 . Driving on a
significantly under-inflated tire causes
the tire to overheat and can lead to tire
failure. Under-inflation also is likely to
impair the vehicle's handling and stop­
ping ability.
- The driver is responsible for maintaining
the correct tire pressures. You must check the tire pressures regularly.
.

M N <( (.J
'SI: ,...., \!) 1.1'1 ,...., 1.1'1 ,....,
Certification .... ... .... ... .. .. .. ... 297
Changing a wheel ................... 275
Changing engine o il ........ .. .. .. .. . 230
Chec king
E ng ine coolant leve l .... ... .. .. .. .. . 23 1
Tire pressure . .. .. ..... ... .. .. .. ... 252
Ch ild restra ints
D anger of using c hild restra ints in the
fro nt sea t . . . . . . . . . . . . . . . . . . . . . . . . 149
Where can I get add it ional information
about child restra ints and their use? .. 19 1
Ch ild restra int system anchors . ....... 187
Ch ild safety .. ............. .... .. ... 173
Convertible locking retractor . . . . . . . . . 184
Important safety instructions for us ing
ch ild safety seats ...... ..... .. .. .. . 177
I mportant th ings to know when dr iv ing
wi th ch ild ren ............ .... .. ... 173
Tether anchors ........... .. .. .. ... 190
Tether straps ... ...... ... .. .. .. .. . 190
Ch ild safety lock
Rear doors ........................ 40
Ch ild safety seats .......... .... .. ... 179
Booster seats ............ .... .. .. . 182
Convertible c hild seats ....... ... .. . 180
Convertible locking retracto r .. ....... 184
H ow do I properly install a child safety
seat in my vehicle? ........ .. .. .. .. . 177
I nfant sea ts ............. .... .. .. . 179
I ns tall ing .. ............. .. .. .. .. . 184
I ns tal ling a child restraint using the
L A TCH system .. .. ..... ... .. .. .. ... 189
LATCH system . . . . . . . . . . . . . . . . . . . . . 189
Lower anchorages ........ .. .. .. .. . 188
Mounting and releasing the anchorage
hook .. .. .. .. ........ ..... ... ... . 189
Safety instructions ................. 177
Unused safety belts on the rea r seat .. 179
Cigarette lighter . . . . . . . . . . . . . . . . . . . . . 59
Cle aning .. .. ............. .... .. .. . 212
Climate control Air vents ... ... .. .. ... ... .. .. .. .. .. 71
Climate controls . . . . . . . . . . . . . . . . . . . . . 69
Climate con trol sy stem
Supp lementary hea ter .. ... .. .. .... .. 74
Climate control (four-zone) Operation . . . . . . . . . . . . . . . . . . . . . . . . . 72
Inde x 301
Climate control (three -zone)
Operation . . . . . . . . . . . . . . . . . . . . . . . . . 70
Clock .............................. 27
Closing Rear lid ........................... 37
Slid ing/tilting sunroof ......... .... .. 41
Cold tire inflation p ress ure ..... ... .. .. 247
Coming home . .. .. ................. . 46
Compact spare tire .................. 274
Compartments .. .... . ... ...... ... .. . 60
Compliance ....... .. ............... 297
Consumer Information . . . . . . . . . . 136, 294
Consu mption (f uel) ............. .. .. . 25
Contacting NH TSA ................. . 136
Controls Cleaning . ... .. .. .. .. .. ...... ... .. 214
Convenie nce key . ...... ............. . 35
Star ting the engine . ........... .... . 76
S topping the eng ine (START ENG INE
STOP b utton) . . . . . . . . . . . . . . . . . . . . . . 77
Switching the ignition on .... ... .. .. . 76
U nlocking and locking vehicle ......... 35
Convertib le child sa fe ty se ats ......... 180
Convertib le locking retractor
Activati ng . . . . . . . . . . . . . . . . . . . . . . . . 186
Deact ivating . .. .. .. ..... .......... 186
U sing to secu re a child safety seat 1B4, 186
Coolant
refer to Engine coolant ............ . 231
Cooling mode (automatic climate control) 72
Cooling mode (climate cont rol) . . . . . . . . . 70
Cruise contro l
Changi ng speed .. .. . .. .. ... ..... .. . 84
P resett ing your speed ............... 85
Switching off ...................... 85
Switch ing on . .. .. .... ........... .. . 84
Wa rning/ind icator lights ........ .. .. . 23
(upholder .. .. .. .. ... ... ...... ..... . 60
C ur ve lig ht . ... .... ... .. .. ..... ... .. 102
Cylinder managem ent
refer to Cyli nder on dema nd System .. . 25
Cyl inder on demand System
25
D
Data recorder ... ...... ............. 194
Date d isp lay .. .. .. .. ............... . 27
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