ESP AUDI A8 2018 Manual Online

u. co .... N
" N .... 0 0 :c ' @ Note
If you leave the child restraint with the tether
strap firm ly installed for severa l days, this
could leave a mark on the upholstery on the
seat cush ion and backrest in the area where
the tether strap was installed . The upholstery
would also be permanently stretched around
the tether strap . This applies especially to
leather seats .
Using tether straps on rearward-facing
child restraints
Current ly, few rear-facing chi ld restraint systems
come with a tether. Please read and heed the
child rest raint sys tem manufacturer 's instruc­
tions carefully to determine how to properly in­
stall the tether .
A WARNING
A child in a rea rward-facing ch ild safety seat
installed o n the fro nt passenge r seat w ill be
ser ious ly injured and can be killed if t he fron t
airbag infla tes -even w it h a n Advanced A irbag
System.
- T he inflat ing air bag w ill hit t he chi ld safety
sea t or infan t carrie r wi th g reat force and
wi ll smash the chi ld safety seat and chi ld
against t he backrest, center armrest, o r
door .
- A tight tether or other strap on a rearward ­
facing child restraint attached to the front
passenger seat can put too m uch pressure
on the weight-mat in the seat and register a
heav ier weight in the Advanced Airbag Sys­
tem . The heav ier we ight registered can
make the system wo rk as though an adult
we re o n the seat and deploy the Adva nced
Airbag whe n it mus t be sup pressed ca u sing
ser ious o r even fa tal injur y to the c hild.
-If you must install a rearward fac ing c hild
safety seat on t he front passenger seat be ­
ca use of exceptiona l circumst ances and the
PASSENGER AIR BAG OFF lig ht does not
come on and stay on, immediate ly install
the rear-fac ing ch ild safety seat in a rear
seat ing pos it ion and have the airbag system
inspected by your Audi dealer.
Ch ild saf ety
Additional information
Sources of information about child
restraints and their use
T here are a number of sources o f additional in ­
formation about child restraint se lection, instal ­
l ation and use :
N HT SA advises that the best ch ild safety seat is
the one that f its your child and fi ts in your vehi ­
cle, and that you wi ll use correct ly and consis ­
tent ly.
T ry befo re yo u buy!
U.S . National Highway Traffic S afet y A dminis­
tration
T el. : 1-888-3 27- 42 36 ( TTY: 1-800 -424-9153)
http:/ /www.nh tsa.gov
http:/ /www.sa ferca r.gov
National SAFE KIDS Camp aig n
Tel. : (202) 66 2-0600
http:/ /www.safekids .org
Safety BeltSaf e U.S .A
Te l.: (800) 745 -SA FE (E nglish)
T el. : (800) 747-SANO (Spanish)
http://www.ca rsea t.o rg
Tran sport C anada Information Centre
Tel. : 1-800-333-0371 o r ca ll 1 -613-998-86 16 if
yo u are in the Ottawa area
http://www.tc.gc.ca/ eng/ roadsafety/men u. h tm
Audi Cu stomer Relation s
Tel.: (800) 822-2834
267

u. co .... N
" N .... 0 0 :c ' fill up at busy gas stations where the seasona l
adjustment is more like ly to be made in time .
@ Note
-Methanol f uels whi ch do not meet these re ­
quirements may ca use corrosion and dam­
age to plastic and rubber components in the
fuel system .
- Do not use fuels that fai l to meet the speci ­
fied criteria in this c hapter.
- If you are unable to determine whether or not a particular fue l blend meets the speci ­
fications, ask your service station or its fuel
supplier.
- Do not use fuel for which the contents can­
not be identif ied.
- Fuel system damage and performance prob ­
l ems resulting from the use of fue ls differ­
ent from those specif ied are not the respon­
s ibility of Audi and are not covered under
the New Veh icle or the Emiss ion Control
System Warrant ies .
- If you experience a loss of fue l economy or
driveability and performance problems due
to the use of one of these fuel blends, we
r ecommend that you switch to unblended
fuel.
Gasoline additives
Applies to: vehicles with gasoline engine
A majo r concern among many auto manufactur ­
ers is carbon deposit build-up caused by the type
of gasoline you use.
A lthough gasoline grades d iffer from one manu­
facturer to another, they have cer tain things in
common . A ll gasoline grades contain substances
that can cause deposits to collect on vita l engine
parts, such as fue l injectors and intake valves . A l­
though most gasoline brands include additives to keep engine and fuel systems clean, they are not
equally effective.
Audi recommends using TOP TIER Detergent Gas­
oline. For more informat ion on TOP TIER Deter­
gent Gasoline, please go to the official website (www .toptiergas .com) .
Check ing and F illing
A fter an extended period of using inadequate
fuels, carbon deposit bui ld-ups can rob your en ­
gine of peak performance.
@ Note
Damage or ma lf u nction due to poor fue l qual ­
ity is not covered by the A udi New Vehicle
L imited Warranty .
Refueling
Fuel filler neck
The fue l filler neck is located on the rig ht rea r
s ide panel behind the fuel fille r flap .
If the power lock ing system should fa il, yo u can
st ill open the flap manually - fo r detailed instruc­
tions see
~page 271.
You can find the fuel tank capacity of your vehicle
i n
~ page 334 .
The label on the inside of the fuel filler flap tells
you the correct fuel for your vehicle. For more in­
format ion about fuel spec ificat ions, see
~ page 268 .
Your vehicle fuel tank has an onboard refuelling
vapor recovery system. T his feature helps to pre­
vent fuel vapors from escaping from the tank and polluting the environment wh ile you refuel your
vehicle. In o rder to fill the tank proper ly w hile
prote ct ing t he env ironment, p lease follow t his
r ef uel ing p rocedure carefully.
& WARNING
= -
Unde r normal opera ting condi tions, neve r ca r­
r y additional f uel containers in your car. Gas
canisters and other containers used to trans ­
port fue l can be dangerous. Such containers,
f u ll or empty, may leak and could cause a fire
i n a collision. If you must transport fuel to
use for your lawn mower, snow blower, etc.,
be ve ry ca refu l and always observe loca l a nd
state laws rega rding the use, transpo rta tion
a nd stor age of su ch f uel con tainers. Make cer ­
t ai n t he co nta iner meets indus try standards
(A NSI/AS TM F8S2 - 86) .
269

Checking and Filling
If you must add coolant, use a mixture of water
and coolant additive . Mixing the coolant additive
with distilled water is recommended.
Coolant additive
The coolant additive is made of anti-freezing and
corros ion protection agents. Only use the follow ­
ing coo lant additives .
Coolant additive Specification
Gl2evo
TL 774 L
Gl2++ TL 774 G
Gl3
TL 774 J
These additives may be mixed wi th each othe r.
The amount of coo lant additive that needs to be
mixed with water depends on the climate where
the vehicle will be operated. If the coolant addi ­
tive percentage is too low, the coo lant can free ze
and damage the engine.
Coolant addi- Freeze protec-
tive tion
Warm regions min.
40%, min. -13 °F
max . 45% (-25 °()
C old regions min.
50%, max. -40 °F
max.
55% (-40 °C)
@ Note
-Before the start of winter, have an author­
ized Audi dealer or authorized Audi Service
Faci lity check if the coolant additive in your
vehicle matches the percentage appropriate
for the climate. This is especially important
when driving in colder climates .
-If the appropriate coolant additive is not
available in an emergency, do not add any
other addit ive for risk of damaging the en­
g ine . If this happens, only use water and re­
store the correct mixture ratio with the
specified coolant additive as soon as possi­ ble.
-Only refill with new coolant.
-Radiator sealant must not be mixed w ith
the coolant.
278
Adding coolant
Fig. 260 Eng in e compar tment : coolant exp ansion tank
cover
Observe the safety precautions ~.&, in Working
in the engine compartment on page 2
72.
Checking the engine coolant level
~ Park the vehicle on a level surface .
~ Switch the ignit io n off.
~ Read the coolant level on the coolant expansion
tank ~ page 2 74. The coolant leve l must be be­
tween the MIN and MAX markings when the en­
gine in co ld. When the engine is warm it can be
slightly above the MAX marking,
Adding coolant
Requirement: there must be a residual amount of
coolant in the expansion
tank ~(©) .
~ Let the engine cool down .
~ Place a cloth over the coolant expansion tank
cap and unscrew the cap counterclockwise
~.&. -
~ Add coo lant mixed in the correct ratio
~ page 277 up to the MAX marking.
~ Make sure that the f luid level remains stable.
Add more coolant if necessary .
~ Close the cap securely .
Coo lant loss usually indicates there is a leak . Im ­
mediate ly drive your vehicle to an authorized
Audi dealer or authorized Audi Service Fac ility
and have the cooling system inspected. If the
cooling system is not leaking, a loss can come
from the coolant bo iling t hrough overheat ing
and being pushed out of the cooling system .

u. co .... N
" N .... 0 0 :c ' ~ At the end of the charging process, switch the
charger off and pull the power cab le out of the
socket.
~ Now remove the charg ing device terminal
clamps .
~ Close the cover @on the positive term inal and
re-install the
cover (!).
~ Close the hood c:;, page 2 73 .
A drained battery can freeze at temperatures
around
322F (0QC) . A frozen or thawed out bat­
tery must no longer be used . The battery hous ing
could be cracked by the format ion of ice , which
could cause battery acid to leak out
c:;, ,&. .
Charg ing the b attery
Only use chargers with a ma ximum charg ing
v oltage of 14 .8 V.
The battery connecting cables
do not need to be disconnected . Do not open the
battery when charg ing .
Read all of the manufacturer's instructions for
the charger before charging the battery .
A WARNING
-A h ighly exp losive mixture of gases can form
w hen cha rging batter ies. O nly charge t he
vehicle ba tte ry in well -vent ilated a reas.
- A d rained vehicle battery can freeze at tem­
peratu res a round 32
Q F (0 QC). A froze n or
thawed ve hicle battery m ust not be ch arged
and must not be used anymore. The battery
housing can crack and battery acid can leak
out if ice forms, whic h increases the risk of
an exp losion and chemical burns. Contact an
authorized Audi dealer or authorized Aud i
Service Facility for more information.
- Do not connect or disconnect the charg ing
cable while charg ing because th is increases
the risk of an explosion .
(D Tips
-Only charge the vehicle battery through the
connections in the engine compartment.
-Read all of the manufacturer's instructions
for the charger before charg ing the ve hicle
battery .
Ch eck ing and F illing
Windshield washer
system
F ig . 263 E ngin e compar tmen t: was he r fl ui d reservo ir cap
M N
-N ' "' "' m
The windshield washer fluid reservoir O contains
the cleaning solution for the windshie ld and the
headlight washer system
c:;, fig. 263, c:;, page 274.
The reservoir capacity can be found in
<=> page 334.
To reduce the risk of lime scale depos its on the
spray nozzles, use clean water with low amounts
of calcium. Always add w indow cleaner to the wa­
ter . When the outside temperatures are cold, an
anti -freezing agent should be added to the water
so that it does not freeze .
@ Note
-The concentration of ant i-freez ing agent
must be adjusted to the veh icle operat ing
condit ions in the respective cl imate . A con­
centration that is too high can lead to vehi­
cle damage.
- Never add radiato r anti-freeze or other addi­
t ives to the washer fluid.
- Do not use a glass cleaner that conta ins
paint so lvents, because t his could damage
the paint.
Service interval display
The service interval display detects when your ve­
hicle is due for service.
T he serv ice interval d isplay wo rks in two stages:
-In sp ec tio n o r oil change remind er: after a cer-
tain distance driven , a message appears in the
.,.
2 8 1

Checking and Filling
instrument cluster display each time the ign i­
tion is switched on or off . The rema ining
distance or time is displayed br iefly.
- Inspection or oil change due: if yo ur vehicle
h as reached an inspection o r oi l change interval
o r both intervals at t he same time, the mes­
sage
Inspection due! or Oil change due! or Oil
change and inspection due!
appears br iefly af­
te r switch ing the igni tion on/off .
Checking service intervals
You can check t he rema ining distance o r time un­
til the next oil change o r next inspec tion i n the
Ca r menu. To do this, select: the
IC ARI function
button
> Car systems contro l bu tton > Service &
control > Service intervals .
Resetting the indicator
A n author ized A udi dealer or authorized A udi
Serv ice Facility will reset the serv ice interval d is­
p lay after pe rforming serv ice .
I f yo u have chan ged t he oil you rself, you must re ­
set t he oil change interva l.
To reset the in dic ator, se le ct : th e
ICAR I fu nc tion
but ton
> Car system s control button > Service &
control > Service intervals. T urn t he control knob
downwa rd to
Reset oil change interval an d press
the co ntro l knob.
{QJ Note
- On ly reset the oil ch ange in dicato r if the oil
was c han ge d.
- Fo llow ing the service i nte rvals is cr itical to
maintai ning the service life a nd value o f
your ve hicl e, especia lly t he engine. Even if
the m ileage on the veh icle is low, do not ex­
c e ed th e tim e fo r th e ne xt serv ic e .
282

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"' -N .... N
-0
0
J: ..
® Mud and snow capability
"M/S" or "M+S" indicates the tire
has properties making it suitable
to drive in mud or
snow .~ indi­
cates a winter tire .
@ Composition of the tire cord
and m aterials
The number of plies indicates the
number of rubberized fabric lay­
ers in the tire. In general : the
more layers, the more weight a
tire can carry . Tire manufacturers
must also specify the materials
used in the tire . These include
steel, 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 ti re quality grade
standards for treadwear,
traction and temperature resistance
Treadwear , traction and tempera­
ture
ranges¢ page 299 .
@ Running direction
The arrows indicate the running
direction of unidirectional tires .
You must always follow the speci- fied running direction
¢
page 319.
@ Maximum permitted
inflation p ressure
Wh eel s
This number indicates the maxi­
mum pressure to which a tire can
be inflated under normal operat­
ing conditions.
Glossary of tire and loading
terminology
Accessory weight
means the combined weight (in
excess of those standard items
which 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 width of the tire in percent .
Numbers of 55 or lower indicate a
low sidewall for improved steer­
ing response and better overall
handling on dry pavement .
285

Wheel s
Occupant loading and distri­
bution for vehicle normal load
for various designated seating
capacities
Refer to the tire inflation pres­
sure
label ¢ page 293, fig . 267
for the number of seating posi­
tions . Refer to the
table¢ table
on page 295
for the number of
people that correspond to the ve­
hicle normal load .
New tires or wheels
Audi recommends having all work
on tires or wheels pe rformed by
an authorized Audi dealer or au­
thorized Audi Service Facility .
T hese facilities have the proper
knowledge and are equipped with
the required tools and replace ­
ment parts.
.,. New tires do not yet have the
optimum gripping properties. Drive carefully and at moderate
speeds fo r the first 350 miles
(500 km) with new tires .
.,. Use tires of the same construc ­
tion, size (rolling circumference)
and as close to the same tread pattern as poss ible on all four
wheels .
290
.,.Do not replace tires individually .
At least replace both tires on the
same axle at the same time.
.,. Audi recommends that you use
Audi Original Tires. If you would like to use different tires, please
note that the tires may perform
differently even if they are the
same
size¢ ,&.
.,. If you would like to equip your
vehicle with a tire/rim combina ­
tion that is different from what
was installed at the factory, con­
sult with an authorized Audi
dealer or authorized Audi Service
F acility before making a pur­
chase ~ &-
The spare tire* is different from
the regular tires installed on the
vehicle - for example, if winter
tires or wide tires are installed -
so only use the spare tire* tempo ­
rarily in case of emergency and
drive carefully while it is in use. It
should be replaced with a regular
tire as soon as possible.
All four wheels must be equipped
with tires that are the same brand and have the same construction
and tread pattern so that the
drive system is not damaged by
different tire speeds. For this rea-
son, in case of emergency, only
.,.

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 .
.,.

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