wheel AUDI A8 2018 Manual PDF

u. co .... N
" N .... 0 0 :c ' ~ Check and correct the seating of the snow
chains after driving a few feet, if necessary. Fol­
low the instructions from the manufacturer.
~ Note the maximum speed of 30 mph (SO km/
h). Note the loc al regulations.
Use of snow chains is only permitted with certain
rim/tire combinations due to technical reasons.
Check with an authori zed Audi dealer or author­
ized Audi Service Facility to see if you may use
snow chains .
You must remove the snow chains on roads with­
out snow. Otherwise, you could impair driving
ability and damage the tires.
A WARNING
Using incorrect snow chains or installing snow
chains incorrectly can result in loss of vehicle
control, which increases the risk of an acci­
dent.
0 Note
-Snow chains can damage the rims/wheel
covers* if the chains come into direct con·
tact with them . Remove the wheel covers*
first. Use coated snow chains.
-Using snow chains that add more than 0.4
inch (10.5 mm) of height can severely dam­
age the wheel housings and other vehicle
components.
-Do not install and use snow chains if there is
a malfunction in the adaptive air suspen­
sion, because the vehicle height will be very
low. If you drive with snow chains anyway,
the wheel housings and other vehicle com­ ponents can be severely damaged.
@ Tips
When using snow chains, it may be useful to
switch on sport mode
¢ page 128.
Low-profile tires
Appl ies to: ve hicles w ith low-profile tires
Your vehicle is equipped with low-profile tires* at
the factory . Compared to other tire/rim combina­
tions, low-profile tires offer a wider tread surface
and a larger rim diameter with shorter tire side-
Wheels
walls. This results in an agile driving style. How­
ever, it may reduce the level of comfort and in­
crease road noise when driving on roads in poor
condition.
Low-profile tires can become damaged more
quickly than standard tires when driving over
large bumps, potholes, manhole covers, speed
bumps and curbs. Therefore, it is particularly im­
portan t to maintain the correct tire pressure
¢ page 293.
To reduce the risk of damage to the tires and
rims, drive very carefully on poor roads.
Check your wheels regularly every 2,000 mi
(3,000 km) for damage. For example, check for
bulges/cracks on the tires or deformations/
cracks on the rims.
After a heavy impact or damage, have the tires
and rims inspected or replaced immediately by
an authorized Audi dealer or authori zed Audi
Service Facility.
Low-profile tires can wear out faster than stand­
ard tires.
Summer tires are not suitable for cold weather,
snow or black ice. If you are driving in these con­
ditions, use winter or all season tires
¢ page 298.
Uniform tire quality grading
-Tread wear
-Traction AA AB C
-Temperature ABC
Quality grades can be found where applicable on
the tire side wall between tread shoulder and
maximum section width
¢ page 283, fig. 264.
For example: Tread wear 200, Traction AA, Tem­
perature
A .
All passenger car tires must conform to Federal
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
299

Wheels
under controlled conditions on a specified
government test course.
For example, a tire graded 150 would wear one
and one ha lf (11/2) times as well on the govern­
ment course as a tire graded 100 .
The relative performance of tires depends upon
the actual conditions of their use, howeve r, and
may depart significant ly from the norm due to
variations in driving habits, service practices and
differences in road characteristics and climate .
Traction
The traction grades, from highest to lowest, are
AA, A, Band
C. Those grades represent the tire's
ability to stop on wet pavement as measured un­
der contro lled conditions on specified govern­
ment test surfaces of aspha lt and concrete. A tire
marked C may have poor traction performance
¢ & .
Temperature
The temperatu re grades are A (t he highest), B ,
and C, representing the tire's resistance to the
generation of heat and its ability to dissipate
heat when tested under controlled conditions on
a specified indoor laboratory test wheel.
Sustained high temperature can cause the mate ­
rial of the tire to degenerate and reduce tire life,
and excessive temperature can lead to sudden
tire
fa ilure¢ fr:. .
The grade C corresponds to a leve l of perform ­
ance which a ll passenger car tires must meet un­
der the Federa l Motor Vehicle Safety Standard
No. 109. Grades B and A represent higher leve ls
of performance on the laboratory test wheel than
the mi nimum required by law.
A WARNING
-
The traction grade assigned to this tire is
based on straight-ahead braking traction
t ests, and does not include acceleration, cor­
nering, hydroplaning or peak traction charac­
teristics.
300
A WARNING
The temperature grade for t his tire is estab­
lished for a tire that is properly inflated and
not overloaded. Excessive speed, underinfla­
tion, or excessive loading, either separately or
in comb ination , can cause heat buildup and
possible tire failure.
A WARNING
-
-
Temperature grades apply to tires that are
properly inflated and not over or under inflat­
ed .
Tire Pressure Monitoring
System
(AS, S8)
ill General notes
Applies to: AS, 58
Each tire, including the spare (if prov ided),
shou ld be checked monthly when cold and inflat­
ed to the inflation pressure recommended by the
vehicle manufacturer on the vehicle placard or
tire inflation pressure labe l.
(If your veh icle has
tires of a different size than the size ind icated on
the ve hicle placard or tire inflat ion pressure la­
bel , you should determ ine the proper tire infla­
tion pressure for those tires).
As an added safety feature, your vehicle has been
equipped with a tire pressure mon itor ing system
(TPMS) that illum inates a low tire pressure tell­
tale when o ne or more of your tires is significant­
l y unde r-inflated. According ly, when the low tire
pressure telltale illum inates, you sho uld stop and
check your tires as soon as possible, and inflate
them to the proper pressure . Driving on a signifi ­
cant ly under -inflated tire causes the tire to over­
heat and can lead to tire fai lure. Under-inflation
also reduces fue l eff iciency and tire tread life,
and may affect the vehicle's handling and stop­ ping ability.
Please note that the TPMS is not a substitute for
proper tire maintenance, and it is the dr iver's re ­
spons ibility to maintain correct t ire pressure,
even if under-inflation has not reached the level
to trigger illumination of the TPMS low tire pres-
sure te lltale .
.,.

lL t:0 ....
"" ......
"" .... 0 0 :c ' Your vehicle has also been equipped with a TPM S
malfunction indicator to indicate when the sys­
tem is not operating properly. The TPMS mal­
function indicator is combined with the low tire
pressure telltale. When the system detects a
malfunction, the telltale will flash for approxi­
mately one minute and then remain cont inuously
illuminated . This sequence will continue upon
subsequent vehicle start-ups as long as the mal­
function ex ists.
When the malfunction indicator is illuminated,
the system may not be ab le to detect or signal
low tire pressure as intended . TPM S malfunctions
may occur for a var iety of reasons, including the
installation of replacement or alternate tires or
wheels on the vehicle that prevent the TPMS
from functioning properly. Always check the
TPMS malfunction telltale after replacing one or
more tires or wheels on your vehicle to ensure
that the replacement or alternate tires and
wheels allow the TPMS to continue to function
properly.
If the Tire Pressure Monitoring System
indicator appears
Applies to: AS, 58
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. 268 Instrument clus ter: indicator light with message
Using the ABS sensors, the tire pressure monitor­
ing system compares the tire tread circumfer­
ence and vibration characteristics of the individu­
al tires . If the pressure changes in one or more
tires, this is ind icated in the instrument cluster
display with an indicator light
ti] and a message .
Wheels
If only one tire is affected, the location of that
tire will be indicated.
The tire pressures must be stored in the Infotain­
ment system again each time the pressures
change (switching between partial and full load
pressure) or after changing or replacing a tire on
your vehicle
c:> page 302. The tire pressure mon i­
toring system only monitors the tire pressure you
have stored. Refer to the tire pressure label for
the recommended tire pressure for your vehicle
c:> page 293, fig . 267 .
Tire tread circumference and vibration character­
istics can change and cause a tire pressure warn­
ing if :
- the t ire pressure in one or more tires is too low
- the tire has structural damage
- the tire was replaced or the tire pressure was
changed and it was not stored
c:> page 302
- the spare tire* is installed
Indicator lights
ti] Loss of pressure in at least one tire c:> ,&..
Check the tires and replace or repair if necessary.
Check/correct the pressures of all four tires and
store the pressure again in the Infotainment sys­
tem
c:>page 302.
mm ( T ire Pressure Monitor ing System) Tire
pressure: System malfunction!. Ifm:m appears
after switching the ignition on or while driving
and the
ti] indicator light in the instrument clus­
ter blinks for approximately one minute and then
stays on, there is system malfunction. Try to
store the correct tire pressures
c:> page 302. If
the indicator light does turn off or turns on again
after a short period of time, drive to an author­
ized Audi dealer or authorized Audi Service Facili­
ty immediately to have the malfunction correct­ ed .
.&, WARNING
- If the tire pressure ind icator appears in the
display, reduce your speed immediately and
avoid any hard steering or braking maneu­
vers. Stop as soon as possible and check the
tires and their pressure.
..,.
301

Wheels
-The driver is responsible for maintaining the
correct tire pressure. You must check the
tire pressure regularly.
- Under certain conditions (such as a sporty
driving style, winter conditions or unpaved
roads), the tire pressure monitoring system
indicator may be delayed .
- Do not use run-flat tires on your vehicle. Us­
ing them when not permitted can lead to
vehicle damage or accidents .
(D Tips
- The tire pressure monitoring system can al­
so stop working when there is an ESC mal­
function .
- Using snow chains may result in a system
malfunction.
- The tires with the identification
"AO" or
"RO" ¢ page 290 have been matched with
your Audi tire pressure monitoring system.
Using these tires is recommended.
Storing tire pressures
Applies to: AB, S8
If the tire pressure changes or a tire is replaced,
it must be confirmed in the Infotainment sys­
tem .
.,. Make sure before storing that the tire pressures
of all four tir es meet the specified values and
are adapted to the
load ¢ page 291 .
.,. Switch the ignition on .
.,. Select : the ICARI function button > Car Systems
control button > Service & control > Tire pres­
sure monitor> Store tire pressure > Yes, store
now.
(D Tips
Do not store the tire pressures if snow chains
are installed. Otherwise the system could
malfunction.
302
Tire Pressure Monitoring System (SB plus)
ill General notes
Applies to: S8 plus
Each tire, including the spare (if provided),
shou ld be checked monthly when cold and inflat­
ed to the inflation pressure recommended by the
vehicle manufacturer on the vehicle placard or
tire inflation pressure label. (If your vehicle has
tires of a different size than the size ind icated on
the veh icle placard or tire inflat ion pressure la­
bel, you should determine the proper tire infla­
tion pressure for those tires).
As an added safety feature, your vehicle has been
equipped with a tire pressure mon itor ing system
(TPMS) t hat illuminates a low tire pressure tell­
ta le when o ne or more of your tires is significant­
l y under-inflated. According ly, when the low tire
pressure telltale illuminates, you should stop and
check your tires as soon as possible, and inflate
them to the proper pressure . Driving on a signifi ­
cant ly under-inflated tire causes the tire to over­
heat and can lead to tire failure . Under-inflation
also reduces fuel efficiency and tire tread life,
and may affect the vehicle's handling and stop ­
ping ability .
Please note that the TPMS is not a substitute for
proper tire maintenance, and it is the driver's re­
spons ibility to maintain correct t ire pressure,
even if under-inflation has not reached the level
to trigge r illumination of the TPM S low t ire pres­
su re te lltale.
Your vehicle has also been equipped with a TPMS
malfunction indicator to ind icate when the sys­
tem is not operating prope rly . The TPM S mal­
function indicator is combined with the low t ire
pressure telltale. When the system detects a
malfunction, the telltale will flash for approxi­
mately one minute and then remain continuously
illuminated. This sequence wi ll continue upon
subsequent vehicle start-ups as long as the mal­
function exists.
When the malfunction indicator is illuminated,
the system may not be able to detect or signal
low tire pressure as intended. TPMS
malfunctions ..,_

u. co .... N
" N .... 0 0 :c ' may occur for a variety of reasons, including the
installation of replacement or alternate tires or
wheels on the vehicle that prevent the TPMS
from functioning properly . Always check the
TPMS malfunction telltale after replacing one or
more tires or wheels on your vehicle to ensure
that the replacement or alternate tires and
wheels allow the TPMS to continue to function
properly.
Description
Applies to: 58 plus
The tire pressure monitoring system monitors
the pressure in the four tires when driving.
The system uses sensors that measure the tem ­
perature and pressure in the tires . The data is
sent from these sensors to the control module by
radio frequency.
The Tire Pressure Monitoring System shows the
current pressures and temperatures of the tires
in the Infota inment system
c:> page 303 . It also
compa res the current tire pressures with the
stored tire press ures and gives a warning in the
driver information system if the tire pressure is
different from what is stored
c:> page 304.
The system does not detect if the stored tire
pressures match the recommended tire pres­
sures.
- Every time the tire pressures change, for exam-
ple when the load in the vehicle changes,
- after replac ing a tire, or
- if wheels with new wheel sensors are used,
you must store the tire pressures again
c:> page 304.
A WARNING
-The tire pressure mon itor ing system assists
the driver in monitoring tire pressures. The
dr iver is responsible for having the tires in­
flated to the correct pressure.
- Do not change the tire pressure when the
temperature of the tire is extremely high.
T his cou ld result in serious damage to the
t ir e and even cause the tire to burst, in­
creasing the risk of an accide nt.
Wheels
-A tire with low pressure flexes more . This
heats the tire up too much. This could cause
the tread to separate and even cause the
tire to burst, increasing the risk of an acci­
dent.
- The Tire Pressure Monitoring System does
not warn you of damage or defects in the
tire construct ion that could cause the tire to
burst, for example. Inspect your tires regu­
larly.
@ For the sake of the environment
Low tire pressure increases fuel consumption
and tire wear.
(D Tips
-The pressure of the spare t ire* is not mon i­
tored.
- If tires are replaced, the sensors/va lves do
not need to be removed or replaced. Just re­
placed the valve stem and, if necessary, the
valve and the whee l electronics . If you have
questions, see an authorized Audi dealer or
authorized Audi Service Facility.
Displaying tire pressures/temperatures
Applies to: 58 plus
Requirement: the ignition must be switched on.
.. Select: the I CAR! funct ion button > Car systems
> Service & control > Tire pressure monitor >
Display tire pressure .
The current tire pressures are shown in green and
yellow numbers in the Infotainment system:
-Green: the current tire pressure and the spec i­
fied tire pressure are approx imately the same .
-Yellow: the current tire pressure is too low
compared to the specified tire pressure .
The specified tire pressure is the last tire pres ­
sure that was stored
c:> page 304 .
Note that the tire pressure also depends on the
temperature of the tire . The tire pressure in­
creases as the engine becomes warmer while
driv ing.
.,.
303

Wheels
~ WARNING
Read and follow the important information
and notes ¢
page 303.
© Tips
The tire pressure or tem perature a re not di s­
played in ada pta tion mode. Da shes --.-- a re
shown in place of the press ure and tempera ­
ture .
Tire pressure loss
Applies to: 58 plus
F ig. 269 D isp lay: ind icator light wi th a message
-
If the IE indica to r li ght turns on, the p ressure in
at least one ti re is too low or new sensors were
not adapted :
RE indicator lights turns on after turning the
ignition on
The tire pressure is too low compared to the
specif ied pressure .
.,. Check and store the t ire pressure(s) the next
ti me it is poss ible¢
page 304 .
RE indicator light turns on while driving
Wheels with new senso rs were not adapted or
the t ire pressu re has reached a c ritical leve l com­
p ar ed to the specified press ure.
.,. Avo id unnecessary steering and braking maneu-
vers .
.,. Adapt you r d riving style to the situation .
.,. Stop as soon as possible and check the t ire(s) .
.,. If it i s po ssible to co nti nu e d riving, see an au-
t horized Audi dea le r or a uthorized Audi Service
Fa cility immed iate ly and have your tire(s) re­
paired or replaced.
304
A WARNING
, -
Read and fo llow the important information
and notes
¢ page 303.
Storing new tire pressures
App lies to: 58 pl us
Correctly stored tire pressure specifications are
necessary for reliable tire pressure monitoring.
.,. Check the tire pressures in all wheels .
-
.,. If necessary , correct the tire press ure according
to the specifications on the sticker on the driv ­
er's doo r
q page 291. On ly co rrect t he pressure
in t ires whose tempe rature is appro ximate ly
the same as the ambient tempera ture. If the
tempe rature of the tire is higher than the ambi­
ent air tempe rature, the t ire pressure must be
i n creased approxim ate ly 3 PSI (0 ,2 ba r) above
the val ue on the sticker .
.,. Switch the ignitio n on .
.,. Select: !CAR ! function button > Car systems >
Tire pressure mon itoring > Sto re tire pressure .
After storing, the t ire pressu re monitoring sys­
tem measures t he current t ire pressures and
s to res them as the new specif ied pressures .
.,. If the changed tire p ressures are not displayed
in the Infotainment system, d riv e the veh icle
for approximately 10 minutes so that the sen­ so r signa l from the w heels is received again.
D ur ing this adapta tion phase, --,--is displayed
fo r pressure and temperat ure and t he Tire Pres­
su re Moni toring Sys tem is on ly p arti all y av ail a­
ble: it only warns yo u if one or more of the tire
pressures is/are under t he minim um permitted
val ue. If th is is the case, the
IE indicator light
appears with a message .
A WARNING
Read and follow the important information
and notes
q page 303.
Malfunctions
App lies to: 58 plus
-
If the Tire Pressure Mon itoring System is not
available, t he
mm indicato r light appears in the
dr ive r informa tion system . T he
IE indica to r light .,..

u. co ..... N
" N ..... 0 0 :c ' also blinks for approximately one minutes each
time the ignition is switched on . The tire pressure
monitoring system cannot be selected in the In­
fotainment system. The following are examples
of situations that could cause a malfunction:
- If the message appears at the end of the adap­
tation phase, the system cannot detect the
wheels installed on the vehicle . This may result
from one or more wheels being installed with­ out wheel sensors or with incompatible wheel
sensors .
- A wheel sensor or another component has
failed .
- Using snow chains can affect the function of
the system because of the shielding effect of
the chains .
- The tire pressure monitoring system is not
available due to a malfunction .
- Transmitters with the same frequency, such as
headphones or remote-controlled devices, may
cause a temporary system malfunction due to
the strong e lectromagnetic field .
The
@m indicator light turns off once the Tire
Pressure Monitoring System is available again . If
you cannot correct the malfunction and the
mm
indicator light stays on, drive immediately to an
author ized Audi dealer or author ized Audi Service
F acility to have the malfunction repaired.
Wheels
305

u. co .... N
" N .... 0 0 :c ' & WARNING
-Only wash the vehicle when the ignition is
off and follow the instructions from the car
wash operator to reduce the risk of acci­
dents.
-To reduce the risk of cuts, protect yourself
from sharp metal components when wash­
ing the underbody or the inside of the wheel
housings.
-After washing the vehicle, the braking effect may be delayed due to moisture on the
brake rotors or ice in the winter . This in­
creases the risk of an accident. The brakes
must be dried first with a few careful brake
applications.
@ Note
-If you wash the vehicle in an automatic car
wash, you must fold the exterior mirrors in
to reduce the risk of damage to the mirrors.
Power folding exterior mirrors* must only
be folded in and out using the power folding
function.
-To reduce the risk of paint damage, do not
wash the vehicle in direct sunlight.
-
Care and cleaning
-To reduce the risk of damage, do not wash
the power top with a pressure washer.
-To reduce the risk of damage to the surface,
do not use insect removing sponges, kitchen
sponges or similar items.
-Matte finish painted vehicle components:
-To reduce the risk of damage to the sur-
face, do not use polishing agents or hard
wax.
-Never use protective wax. It can destroy
the matte finish effect .
-Do not place any stickers or magnetic
signs on vehicle parts painted with matte
finish paint. The paint could be damaged
when the stickers or magnets are re­
moved .
@ For the sake of the environment
Only wash the vehicle in facilities specially de­
signed for that purpose . This will reduce the
risk of dirty water contaminated with oil from
entering the sewer system.
Cleaning and care information
When cleaning and caring for individual vehicle
components, refer to the following tables. The
information contained there is simply recom­
mendations. For questions or for components that are
not listed, consult an authorized Audi
dealer or authorized Audi Service Facility. Also
follow the information found
in~.&. -
Exterior cleaning
Component Situation Solution
Windshield wiper
Deposits ~ page 51
blades
Headlights/
Deposits Soft sponge with a
mild soap solutiona)
Tail lights
Sensors/
Deposits Sensors: soft cloth with solvent-free cleaning solution
camera lenses Camera lenses: soft cloth with alcohol-free cleaning solu-
tion
Snow/ice Hand brush/solvent-free de-icing spray
Wheels Road salt Water
Brake dust Acid-free special cleaning solution
307
...

u. co .... N
" N .... 0 0 :c ' Care and cleaning
Component Situation Solution
Te xtiles
Deposits adhering to Vacuum cleaner
artificial leather, the surface
Alcantara Water-based deposits Absorbent
cloth and mild soap solutiona>
such as coffee, tea,
b lood, etc.
O il-based deposits Apply a m ild soap solution
al, blot away the dissolved o il or
such as oil, make-up, dye, treat afterward with water, if necessary
etc.
Special deposits such
Specia l stain remover, blot with absorbent material, treat
as ink, nail polish, la- afterward with mi ld soap solution, if necessary
a)
tex paint, shoe pol-
ish, etc .
Natural leather Fresh stains Cotton cloth with a mi
ld soap solution a>
Water-based deposits Fresh stains : absorbent cloth
such as coffee, tea, dried stains: stain remover suitable for leather
b lood , etc.
Oi l-based deposits Fresh sta ins: absorbent cloth and stain remover suitable
such as oil, make-up, for leather
etc . dried stains: oil cleaning spray
Special deposits such Spot
remover suitable for leather
as ink, nail polish, la-
tex paint, shoe pol-
ish, etc.
Care Regularly apply conditioning cream that protects from
light and penetrates into the material. Use specially-c ol-
ored conditioning cream, if necessary .
Refrigerator Dust and dirt Clean the ventilation openings in the luggage compart-
ment
Deposits Lukewarm
water, mild soap solution if
necessarya>, then
dry
Defrosting Empty the refrige rato r, switch it off and let it thaw with
the door open, t hen dry
Carbon parts Deposits clean the same way as plast ic parts
• > Mi ld s oap so lution: maxim um two tablesp oon s of neu tra l soap in 1 quar t (1 lite r) of wat er
A WARNING
Th e windsh ie ld may not be treated with wa­
ter-repelling windshi eld coating agents. Un­
favorable conditions such as wetness, dark­
ness, or lo w sun can result in increased glare.
Wiper blade chatter is also possible.
@ Note
-Headlights/tail lights
-
- Never clean headlights or tail lights with a
dry cloth or sponge.
- Do not use any cleaning product that con­
tains alcoho l, because they could cause
cracks to form .
-Wheels
- Never use any paint polish or other abra-
sive materials.
309

Emergency assistance
Emergency assistance
General information
.,. Park the vehicle as far as possible from moving
traffic in the event of a breakdown. In the event
of a flat tire, park the vehicle on a level surface .
It you are on a steep hill, be especially careful.
.,. Set the parking brake .
.,. Switch the emergency flashers on .
.,. Set up the warning triangle r=;,page 312 .
.,. Have the passengers exit the vehicle . They
should move to a safe place, for example be­
hind a guard rail.
A WARNING
Follow the steps given above. This is for your
protection and the for the safety of other driv­
ers.
Equipment
Warning triangle
Applies to: vehicles with warning triangle
Fig. 270 L uggage co mpartm ent lid : w arnin g triangle
The warning triangle placed in the vehicle at the
factory is located in the luggage compartment.
.,. To remove the warning triangle, press the fas-
tener in the direction of the arrow and fold the
holder down.
The luggage compartment lid is only designed to
hold the warning triangle offered by the Audi
Genuine Accessories program.
312
Vehicle tool kit
Applies to: vehicles with vehicle toot kit
Fig. 271 Lu gg age compartment : cargo floor cove r folded
upward
Fig. 272 Luggage compartment: examp le of vehicle toot
kit and vehicle j ack
The vehicle tools and vehicle jack* are stored in
the luggage compartment under the floor cover .
.,. Lift the cargo floor by the plastic handle .
.,. Hook the handle into the luggage compartment
seal
r:;, fig. 2 71 .
.,. Turn the handwheel counter-clockwise and re ­
move it .
.,. Remove the spare tire* to access the vehicle
tool kit
~ fig. 271 .
Depending on the equipment , the veh icle tool kit
may be located under the spare tire, under an­
other cover or in the tool box.
The position of the vehicle jack* may vary .
A WARNING
Improper use of the veh icle jack can cause se­
rious personal injuries.
-Never use the screw driver hex head to
tighten wheel bolts, since the bolts cannot
attain the necessary tightening torque if you
..,.