wheel bolt torque AUDI S4 2015 Owners Manual

256 Tires and wheels
be fitted over the wheel bolts. These are
available from authorized Audi dealers.
A WARNING
Using the wrong snow chains for your vehi­
cle or installing them incorrectly can in­
crease the risk of loss of control leading to
serious personal injury.
- Snow chains are available in different
sizes. Always make sure to follow the in­
structions provided by the snow chain
manufacturer .
- When driving with snow chains never
drive faster than the speed permitted for
your specific snow chains.
- Always observe local regulations .
- Remove snow chains before driving on
roads not covered with snow to avoid
damaging tires and wearing the snow
chains down unnecessarily .
- Snow chains, which come into direct con­
tact with the wheel rim, can scratch or
damage it . Therefore, make sure that the
snow chains are suitably covered . Check
the position of the snow chains after
driving a few yards and correct if neces­
sary. Follow the instructions from the
snow chain manufacturer when doing so.
(D Tips
Where snow chains are mandatory oncer­
tain roads, this normally also applies to
vehicles with all wheel drive.
Wheel bolts
Wheel bolts must always be tightened to the
corr ect torque.
The design of wheel bolts is matched to the
factory installed rims. 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
secu rely and that the b rake system functions
correctly . In certain circumstances, you may not use
wheel bolts from a different vehicle -even if it
is the same model ¢
page 285.
A WARNING "--
Improperly tightened or maintained wheel
bolts can become loose causing loss of
control, a collision and serious personal in ­
jury .
- Always keep the wheel bolts and the
threads in the wheel hubs clean so the
wheel bolts can turn easily and be prop­ erly tightened.
- Never grease or oil the wheel bolts and
the threads in the wheel hubs. They can become loose while driving if greased or
oiled, even if tightened to the specified
torque.
- Only use wheel bolts that belong to the
rim being installed .
- Never use different wheels bolts on your
vehicle.
- Always maintain the correct tightening
torque for the wheel bolts 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
cle is moving. If the tightening torque is
too high, the wheel bolts and threads
can be damaged and the wheel can be­
come loose.
Q) Note
The specified torque for the wheel bolts is
90 ft lbs. (120 Nm) with a tolerance of
± 7,4 ft lbs. (± 10 Nm). Torque wheel bolts
diagonally . After changing a wheel, the
torque must be checked as soon as possi ­
ble with a torque wrench -preferably by an
authorized Audi dealer or qualified work­
shop .
Low aspect ratio tires
Your Audi is factory-equipped with low aspect
ratio tires. These tires have been thoroughly
tested and been selected specifically for your model for their superb performance, road feel ..,.

264 What do I do now?
also ¢ page 264, Decorative wheel cov­
ers
or ¢ page 264, Wheels with wheel
bolt caps.
2 . Loosen the wheel bolts ¢ page 265.
3. Locate the proper mounting point for the
jack and align the jack below that point
¢ page 265.
4. Lift the car with the jack¢ page 265 .
5. Remove the wheel with the flat tire and
then install the
spare tire¢ page 266 .
6 . Tighten all wheel bolts lightly.
7 .
Lower the ve hicle with the jack .
8 . Use the wheel bolt wrench and
firmly
tighten all whee l bolts in a crisscross pat­
tern
¢ page 265.
9. Replace the decorative wheel cover* or
the
wheel bolt caps* .
A WARNING
Always read and follow all WARNINGS and
information
¢ .&. in Raising the vehicle on
page
266 and ¢ page 267.
After changing a wheel
A wheel change is not complete without the
doing the following .
.,. Always store the vehicle tool kit, the jack*,
and the replaced tire in the l uggage com­
partment ¢
page 132 .
.,. Check the tire pressure of the spare tire as
soon as possible .
.,. As soon as possible, have the
tightening
torques
on all wheel bo lts checked with a
torq ue wrench . The correct tightening tor­
que is 90
ft lbs. (120 Nm).
.,. Have the flat tire
replaced as soon as possi­
ble .
(j) Tips
-If you notice that the whee l bolts are
corroded and difficult to turn while
changing a t ire, they should be replaced
before you check the tighten ing torque.
- Drive at reduced speed until you have the
tightening torques checked .
Decorative wheel covers
Applies to vehicles: with decorative whee l covers
The decorative wheel covers must be removed
first to access the wheel bolts .
Fig. 200 C ha ng in g a w hee l: removing th e w heel cover
Removing
.,. Insert the hook provided with the vehicle
tool kit in the hole in the hub.
.,. Pull off the
decorative wheel cover
qfig. 200.
Wheels with wheel bolt caps
Applies to vehicles: with wheel bolts with caps
The caps must be removed first from the
wheel bolts before the bolts can be un­
screwed .
Fig. 201 Changing a wheel: removing t he wheel bolt
caps
Removing
.,. Push the plastic clip provided with the vehi­
cle tool kit over the wheel bolt cap until it
engages.
.,. Pull on the
plastic clip to remove the cap
qfig. 201.

268 What do I do now?
-Check the tire pressure on the spare imme­
diately after installation.
- Have the wheel bolt tightening torque
checked with a torque wrench as soon as possible by your authorized Audi dealer or
qualified workshop.
- With steel and alloy wheel rims, the wheel
bolts are correctly tightened at a torque of
90 ft lbs. (120 Nm).
- If you notice that the wheel bolts are cor­
roded and difficult to turn while changing
a tire, they should be replaced before you
check the tightening torque.
- Replace the flat tire with a new one and
have it installed on your vehicle as soon as
possible. Remount the wheel cover.
Until then, drive with extra care and at re­
duced speeds.
A WARNING
- If you are going to equip your vehicle
with tires or rims which differ from those
which were factory installed, then be
sure to read the information ~
page 248,
New tires and replacing tires and
wheels.
- Always make sure the damaged wheel or
even a flat tire and the jack and tool kit
are properly secured in the luggage com­
partment and are not loose in the pas­
senger compartment.
- In an accident or sudden maneuver they
could fly forward, injuring anyone in the
vehicle.
- Always store damaged wheel, jack and
tools securely in the luggage compart­
ment. Otherwise, in an accident or sud­
den maneuver they could fly forward,
causing injury to passengers in the vehi­
cle.
@ Note
Do not use commercially available tire
sealants. Otherwise, the electrical compo­
nents of the tire pressure monitoring sys­
tem* will no longer work properly and the
sensor for the tire pressure monitoring system* will
have to be replaced by quali­
fied workshop.

300 Index
w
Warning/indicator lights . . . . . . . . . . 10, 13
Airbag system ........ ... ... ..... .. 20
Anti-lock braking system (ABS) . ... ... . 19
Brake system .................... .. 15
Electromechanical parking brake .... .. 16
Electronic power control . . . . . . . . . . . . . 20
Electronic Stabilization Control (ESC) ... 18
Generator .. .. .. ...... .... ... .. .. .. 16
Malfunction Indicator Lamp (M IL) . . . . . 20
Safety belt .............. .. .. .... .. 16
Safety systems . . . . . . . . . . . . . . . . . . . . . 20
Turn signa ls .............. ... .... .. 22
Warranty coverages .. ...... .. .. .. .. . 283
Washer reservoir .......... .. .. .. .. . 225
Wear ind icator . ........... .... .... . 245
Weights ... .. ... .... ...... .. .. .. .. . 280
What happens if you wear your safety belt
too loose? ... ................ ..... . 140
What happens to unbelted occupants? .. 137
What impairs driving safety? ..... .. .. . 127
What should I do after changing a
wheel? . ..... ................ ..... . 241
What should I do after replacing wheels? 241
Wheel bolts Torque ... .. ... .... ...... .. .. .. .. . 256
Wheels .................... .. .... . 227
Checking tire pressure .............. 239
Cleaning . ................. .. .... . 203
Cold tire inflation pressure . .. .. ..... 234
General notes ... ...... .... ... .. .. . 227
Glossary of t ire and loading terminolo -
gy . ... .. .. ... .... ...... .. .. .. .. . 229
New tires and wheels ...... .. .. .. .. . 248
Tires and vehicle load lim its .... .. .. . 242
When must a safety belt be replaced? . . 139
When must the airbag system be inspect-
ed? ............................... 154
When shou ld I adjust the tire pressures? 241
When should I check the tire pressures? . 241
Where can I find the tire pressures for my
car? . .. ... .................. ..... . 239
Why safety belts? . . . . . . . . . . . . . . 136, 137
Window regulators Power locks . . . . . . . . . . . . . . . . . . . . . . . 42 Windows
Cleaning/removing ice .............. 204
defrosting ... .. .. ................ .. 80
Windsh ield
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . 55
defrosting . . . . . . . . . . . . . . . . . . . . . . . . . 80
Windshield washer fluid Low level . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Windshield washer system ..... .. .. .. . 55
Windshield wipers Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Folding up .... .. ................ .. 57
Indicator light .................. .. . 21
Replacing windshield wiper blades . 57, 58
Switching on/off . . . . . . . . . . . . . . . . . . . 55
Washer reservoir 225
Winter operation Battery . . . . . . . . . . . . . . . . . . . . . . . . . . 222
Car washes ...... ............. .... 202
Coolant system ............... .... 218
Defrosting windows ................. 80
Removing ice from windows ... .. .. .. 204
Seat heating . . . . . . . . . . . . . . . . . . . . . . . 80
T ires ............................ 190
Winter tires . ....................... 254
All wheel drive . .. ... ....... ...... . 254
X
Xenon headlights .. ... ....... 49, 51,272