2018 AUDI Q3 width

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Side assist functions at speeds above approxi­
mately 19 mph (30 km/h).
@ Vehicles that are approaching
I n certain cases, a vehicle will be classified as
cr itica l for a la ne change even if it is still some­
what far away . The faste r a vehicle approaches,
the sooner the display in the exterior mirror will
turn on.
@ Vehicles traveling with you
Veh icles traveling with you are indicated in the
exterior mirror if they are classified as critical for
a lane change. All vehicles detected by side assist
are indicated by the time they enter your "blind
spot", at the latest.
© Vehicles you are passing
If you slowly pass a vehicle that side assist has
detected (the difference in speed between the
vehicle and your vehicle is less than
9 mph (lS
km/h)), the display in the exterior mirror turns
on as soon as the vehicle enters your blind spot .
The
display will not tu rn on if you quick ly pass a
vehicle that side assist has detected (the differ­
ence in speed is greater than 9 mph (15 km/h)).
Functional limitations
The radar sensors are desig ned to detect the left
and right adjacent lanes when the road lanes are
the normal width . In some situations, the display
in the exterior mirror may turn on even though
there is no vehicle located in the area that is criti ­
cal for a lane change. For example:
- If the lanes are narrow or if your are driving on
the edge of your lane. If this is the case , the
system may have detected a vehicle in another
lane that is
not adjacent to your current lane.
- If you are driving through a curve . Side assist
may react to a vehicle that is one lane over
from the adjacent lane .
- If side assist reacts to other objects (such as
high or displaced guard rails).
- In poor weather conditions . The side assist
functions are limited.
Do not cover the radar sensors
c!:> fig. 82 with
stickers, deposits, bicycle whee ls or other ob-
Assistance systems
jects, because they will impair the function. Do
not use side assist when towing a trai ler. For in­
formation on cleaning, see
c!:> page 185.
A WARNING
=
- Always pay attention to traffic and to the
area around your vehicle. S ide assist cannot
replace a driver's attention. The driver alone
is always respons ible for lane changes and
similar dr iv ing maneuve rs .
- In some situations, the system may not
function or its function may be l imited. For
examp le:
- If vehicles are approaching or being left
behind very quickly. The disp lay may not
turn on in time.
- In poor weather conditions such as heavy
rain, snow or heavy mist.
- On very wide lanes, in tight curves, or if
there is a rise in the road surface. Vehicles i n the adjacent lane may not be detected
because they are outside of the sensor
range.
(D Note
The sensors can be displaced by impacts or
damage to the bumper, wheel housing and
underbody. This can impair the system. Have
an authorized Audi dealer or author ized Audi
Service Facility check their funct ion .
(D Tips
- If the window glass in the dr iver's door or
front passenger's door has been tinted, the display in the exterior mirror may be incor­
rect .
- For an explanation on conform ity with the
FCC regulat ions in the United States and the
Industry Canada regulat ions, see
c!:> page 215.
-
79

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Tire designations
Fig. 144 Tire designations on the side­
wall
(D Tires for passenger vehicles
(if applicable)
"P" indicates a tire for a passenger
vehicle. "T" indicates a tire desig­
nated for temporary use.
@ Nominal width
Nominal width of the tire be­
tween the sidewalls in millime­
ters. In general: the larger the number, the wider the tire.
@ Aspect ratio
Height/width ratio expressed as a
percentage .
Wheels
© Tire construction
R indicates a radial tire.
® Rim diameter
Size of the rim diameter in inches.
@ Load index and speed rating
The load index indicates the tire's
load-carrying capacity.
The speed rating indicates the
maximum permitted speed. Also
see
¢ &. in General information
on page 166.
"EXTRA LOAD", "xl" or "RF" indi­
cates that the tire is reinforced or
i s an Extra Load tire.
Speed rat-
Maximum permitted speed
ing
p up to 93 mph (150 km/h)
Q up to 99 mph (160 km/h)
R up to 106 mph (170 km/h)
s up to 110 mph (180 km/h)
T up
to 118 mph (190 km/h)
u up to 124 mph (200 km/h)
H up
to 130 mph (210 km/h)
V up
to 149 mph (240 km/h?)
z above 149 mph (240 km/h)a)
w up to 168 mph (270 km/h)a)
y up to 186 mph (300 km/h)a)
a) For tires above 149 mph (240 km/h),
tire manufacturers sometimes use the
code "ZR".
167

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Glossary of tire and loading
terminology
Accessory weight
means the combined we ight (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 a re available as factory- in­
stalled equipment (whether in­
stalled or not) .
Aspect ratio
means the ratio of the height to
the width o f the tire in percent .
Numbers of 55 or lower indicate a
low s idewal l for improved steer­
ing response and better overall
handling on dry pavement.
Bead
means the part of the t ire that is
made of steel wires, wrapped or
reinforced by ply cords and that is
shaped to fit the rim .
Bead separation
means a breakdown of the bond
between components in the bead .
Wheels
Cord
means the strands forming the
plies in the tire.
Cold tire inflation pressure
means the tir e pressure recom­
mended by the vehicle manufac ­
tu rer for a tire of a designated
size that has not been driven for
more than a couple of m iles (k ilo­
meters) at low speeds in the
three hour period before the t ire
pressure is measured or adjusted .
Curb weight
means the weight of a motor ve­
hicle with standard equipment in­
cluding the maximum capacity of
f u el, o il, and coolant, a ir cond i­
tioning and additional weight of
optio nal eq uipment .
Extra load tire
means a tire designed to operate
at higher loads and at higher in­
flat ion pressu res than the corre­
sponding standard tire . Extra load
tires may be ident ified as "X L",
"xl", "EXTRA LOAD", or "RF" on
the sidewall. .,.
169

Wheel s
Gross Axle Weight Rating
("GAWR ")
means the load-carrying capacity
of a single axle system , measured
at the tire -ground interfaces.
Gross Veh icle Weight Rating
(" GVWR ")
means the maximum total loaded
weight of the vehicle .
Groove
means the space between two ad­
jacent tread ribs .
Load rating (code )
means the maximum load that a
tire is rated to carry for a given in­
flation pressure. You may not find
this information on all tires be­
cause it is not required by law.
Ma ximum load rating
means the load rating for a tire at
the maximum permissible infla­
tion pressure for that tire.
Ma ximum loaded veh icle
weight
means the sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight, and
(d) Production options weight
170
Ma ximum (permissible)
inflation pressu re
means the maximum cold infla­
tion pressure to which a tire may be inflated. A lso called "maxi­
mum inflation pressure."
Normal occupant weight
means 150 lbs. (68 kilograms)
times the number of occupants seated in the vehicle up to the to­
tal seating capacity of your vehi­
cle.
Occupant d istribution
means distr ibution of occupants
in a vehicle.
Outer d iameter
means the overall diameter of an
inflated new tire.
Overall width
means the linear distance be­
tween the exteriors of the side ­
walls of an inflated tire, includ ing
elevations due to labeling, deco­ rations, or protective bands or
ribs .
Ply
means a layer of rubber-coated
parallel cords.

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Production options weight
means the combined weight of
those installed regular production
options weighing over 5 lbs.
(2 .3 kg) in excess of those stand­
ard items which they replace, not
previously considered in curb
weight or accessory we ight, in­
cluding heavy duty brakes, ride
levelers, roof rack, heavy duty
battery, and special trim.
Radial ply tire
means a pneumatic tire in which
the ply cords that extend to the beads are laid at substantially
90 degrees to the centerline of
the tread.
Re commended inflation
pressure
see ¢ page 169, Cold tire infla­
tion pressure .
Reinforced tire
means a tire designed to operate
at higher loads and at h igher in ­
flation pressures than the corre­
sponding standard tire. Rein­
forced tires may be identified as
"XL" "xl" "EXTRA LOAD" or "RF" 1 , ,
on the sidewall.
Wheels
Rim
means a metal support for a tire
or a tire and tube assembly upon
which the tire beads are seated.
Rim diamet er
means nominal d iameter of the
bead seat. If you change your
wheel size, you will have to pur­
chase new tires to match the new
rim diameter.
Rim size designat ion
means rim diameter and width .
Rim width
means nominal distance between
r im
flanges .
Sidewall
means that portion of a tire be­
tween the tread and bead.
Speed rating (letter code )
means the speed at which a tire is
designed to be driven for extend­
ed periods of time . The rat ings
range from
93 mph (150 km/h)
to
186 mph (298 km/h) ¢ table
on page 167.
You may not find
this information on all tires be­
cause it is not required by law.
The speed rating letter code,
where applicable, is molded on
the tire sidewall and indicates the ...
17 1

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and a special procedure. You must not repair or
disassemble them ¢.&. .
A WARNING
Wheel bolts that are tightened or repaired in­
correctly can become loose and result in loss
of vehicle control, which increases the risk of
an acc ident. For the correct tightening specifi ­
cation, see ¢
page 192, After changing a
wheel .
- Always keep the wheel bolts and the
threads in the wheel hub clean and free of grease.
- Only use wheel bo lts that fit the rim .
- Always have damaged r ims repa ired by an
authorized Audi dealer o r autho rized Aud i
Service Facility . Never repair or d isassemble
r ims yourself, because this inc reases the risk
of an accident.
Winter tires
W inte r ti res s ignificantly improve the vehicle's
h andling when driving in win ter condit ions . Be­
cause of the ir constr uction (width, compound,
tread pattern), summer tires provide less trac­
tion on ice and snow .
... Use w inter t ires on all fo ur wheels .
... Only use winter t ires that are approve d for your
v ehicl e.
... Please note that the maximum permitted
speed may be lower with winter tires¢.&.
in
General information on page 166.
An au thor­
ized Audi dealer or author ized Audi Service Fa­
c ili ty can inform you about the maximum per­
mit ted speed for you r tir es .
... Check the tire press ure after installing w heels
¢ page 176.
The effec tiveness of winter tires is reduced great­
l y when the t read is worn down to a depth of
0 .1 57 in ( 4 mm). The char acter istics of win ter
tires a lso dec rease great ly as t he tire ages, re­
gardless of the remaining tread .
@) For the sake of the environment
Reinstall s umme r ti res at the a ppro pria te
t ime, bec ause they provide bet ter hand ling
Wh eel s
when roa ds a re free o f snow and ice . Summer
tires cause less road noise, tire wear and fue l
consumpt ion .
(D Tips
You can also use a ll season tires instead of
winter tires . Please note that in some coun ­
tries where winter tires are required , on ly
winter tires w it h the
& symbo l may be per­
mitted.
Snow chains
S now cha ins not only improve the drivi ng in win ­
te r road condit ions, but also the braking .
... On ly ins tall snow chains on the front wheels.
T his applies a lso to vehicles with a ll wheel
drive*.
... Check and correct the seating of the snow
chai ns after d riving a few feet, if necessary. Fol­
low the instr uctions from the manufac turer.
... Note the maximum permitted spee d when dr iv­
ing with snow chains . Do not exceed 30 mph
(SO km/h).
U se fine-me sh snow chains . They must no t add
more than 0.53 inch (13. S mm) in height, incl ud­
ing t he chain lock .
You m ust remove the snow chains on roads with­
o ut snow . O therwise, you co uld impair d riving
abili ty and damage the t ires .
Use of snow c hains is only permitted with certa in
r im/tire comb inat io ns due to technical reasons .
C heck wi th an au thorized Audi dea ler or author­
ized Audi Service Facility to see if you may use
snow chains .
A WARNING
Using incor rect snow chains or installing snow
cha ins incor rect ly can resu lt in loss of veh icle
control, which increases the risk of an acci·
dent.
(D Note
Snow cha ins can damage the rims/whee l cov-
ers * if the chains come into direct contact
liJJ,
181

Wheels
with them. Remove the wheel covers" first.
Use coated snow chains.
Low-profile tires
App lies to: veh icles with low-profile tires
Your vehicle is equipped with low-profile tires* at
t he factory . Compared to other tire/rim combina­
ti ons, low-profile tires offer a wider tread sur face
and a larger rim diameter with shorter tire side­
walls . This results in an agile driving style . How­
ever, it may reduce the level of comfort and in­
crease road noise when dr iv ing on roads in poor
condition .
Low-profile tires can become damaged more
qu ickly than standard t ires when driving over
large b umps, potholes, manhole covers, speed
bumps and curbs. Therefore, it is part icu lar ly im­
portant to maintain the cor rect tire pressure
¢page 176.
To reduce the r isk 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
bu lges/cracks on the tir es or deformations/
cracks on the r ims.
After a heavy impact or damage, have the tires
and rims inspected or replaced immediate ly by
an author ized Audi dealer or author ized A udi
Serv ice 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 ­
d itions, use winter or all season t ires
¢ page 181.
Uniform tire quality grading
-Tread wear
- T raction AA A B C
- Temperature ABC
Qua lity grades can be found where applicab le on
the tire side wall between tre ad shoulder and
maximum section width
¢ page 16 7, fig . 144 .
182
For example: Tread wear 200 , Traction AA, Tem­
perature
A .
All passenger car tir es must conform to Federal
Safety Requirements in addit ion 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 gov­
ernment test course.
For example, a tire graded 150 would wear one
and one half (1 1/2) times as well on the govern­
ment course as a tir e graded 100 .
T he relative performance of tires depends upon
the actual cond itions of their use, however, and
may depart sign ificantly from the norm due to
variations in driv ing 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 controlled conditions on specified govern ­
ment test surfaces of asphalt and concrete. A tire
marked C may have poor traction performance
¢_& .
Temperature
The temperature grades are A (the highest), B,
and C , representing the tire's resistance to the
generat ion of heat and its ability to dissipate
heat when tested under controlled conditions on
a spec ified 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 failure ¢.& .
The grade C corresponds to a level of perform­
ance which all passenger car tires must meet un­
der the Federal Motor Vehicle Safety Standard
No. 109. Grades Band A represent higher levels
of performance on the laboratory test wheel than
the minimum required by law .
ll>

Tech nical data
Gross Axle Weight Rating
The G ross Ax le We ight Rating is the max imum
load that can be applied at each axle of the vehi ­
cle ¢& .
Vehicle capacity weight
The vehicle capacity we ight (max. load) is l isted
on the d river's side 8-p illar.
_& WARNING
- T he ac tual Gross Axle Weight Rating a t the
front and rear axles sho uld not exceed the
permissible weights, and their combination
must not exceed the Gross Veh icle Weight
Rating.
Dimensions
- Exceed ing permissible weight ratings can
result in vehicle damage, accidents and per­
sonal injury.
(D Note
- The vehicle capacity weight figures apply
when the load is d istr ibuted evenly in the
vehicle (passengers and luggage). When
t ransporting a heavy load in the luggage
compartment, carry the load as near to the
rea r axle as possib le so that the vehicle's
hand ling is not impaired .
- Do not exceed the max imum perm iss ible
axle loads or the maximum gross vehicle
we ight. Always remember that the ve hicle's
han dling will be affe cted by the extra load.
T herefore, a djust your speed acco rd ingly.
- Always observe lo cal regulations.
length (in (mm )) Width (in (mm )) Width across the Height at curb
mirrors (in (mm )) weight (in (mm))
Q3 172.8 (4,388) 72.0 ( 1,83 1) 79.4 (2,019) 62.5 (1,590)
Capacities
Approximate capaci-
ties
Fuel tank 16.9 qt (64 .0 L)
Winds hield and headlight washe r system 4
.8 qt (4.5 L)
210