2018 AUDI Q3 brakes

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Bra kes
Brake i n a t imely man ner. Downsh ift before driv­
ing downhill so that the engine can assist wit h
braking
~ .&. .
When using a tra ile r with ove rru n b rakes, first
b ra ke gen tly the n qu ickly . T his red uces the risk of
je rking wh ile braking if the trailer wheels loc k up.
Engine coolant temperature
P ay a ttention specifica lly to the coolant tempera­
ture d isp lay when t here are high ou tside tempe r­
a tures, a nd when dr iv ing on long inclines
~ page 8. Shift to a highe r gear in a t imely m an­
n e r.
,&. WARNING -
Constant b raking causes the brakes to ove r­
heat and substant ia lly reduces b raking per­
formance, increases braking distance or caus­ es complete fa ilure of the brake system .
Trailer towing
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@ Tips
The cruise control system cannot maintain
the speed cons istently if you are driving on
steep hills. The vehicle weight ca uses the
speed to increase. Due to th is, shift into a
lower gear in t ime or apply the brakes .
Changing the speed
Applies to: vehicles with cruise control system
• To inc rease or decrease the speed in incre­
me nts, p ush the lever tow ard
010 c> page 76,
fig. 78.
• To in cr ease o r decrease the speed qu ickly , hol d
the leve r in the
010 direction un til the de ­
si red spee d is displayed .
Overriding the speed
Applies to: vehicles with cru ise control system
You can a lso press the accelerator pedal down to
i ncrease you r speed, for example if you want to
pass someone. The speed you set earlier w ill re­
sume as soo n as you release the accelerator ped ­
al.
However, if you are driving cons iderably faster
than the stored speed for a long period of time,
the cruise cont rol system wi ll temporarily switch
off . Th e
A;[l)~i4 (USA models) !l'I (Canada mod­
e ls) indica to r li ght in the inst rument cluste r
turns off and the stored speed is m ain taine d.
Preselecting a speed
Applies to: vehicles with cruise control system
You can pre-select your desired spe ed when the
v e hicle is sta tionary.
.,. Switch the ign ition on .
.. Pull the lever into position ©
c> page 76,
fig. 78 .
.,. To inc rease o r decrease the speed, push the lev -
er towar d
010 .
.. To store the speed disp laye d, re lease the lever .
This f unct io n ma kes it poss ib le, for examp le, to
save the spee d yo u wan t be fo re dr iving on the
hig hway. On ce on t he h ighw ay, activa te the
Assistance systems
cruise contro l system by p ulling the lever towa rd
the position ©-
Switching off
Applies to: vehicles with cruise control system
Deact ivating temporarily
• Press the brake pe dal, or
• Press the lever into position @ (not clicked into
place)
c> page 76, fig . 78, o r
• Dr ive for longer t han five minutes at more than
6 mph (10 km/h) above the sto red speed .
Switching off completely
• Press the lever into position @(clicked into
place), or
• Switch the ignit ion off.
T he speed you stored will be maintained if the
c ruise contro l has been switched o ff temporarily.
To resume the stored speed, re lease the bra ke
pedal and pull the lever into pos ition ©-
Switching t he ignition off w ill erase the stored
speed.
A WARNING ,_
You should only resume the sto red speed if it
i s not too high fo r existing t raff ic conditions.
Ot he rw ise you can inc rease the risk of an acci ­
dent.
77

Intelligent Technology Electronic stabilization
control (ESC)
Description
Ele ctronic stabilization control (ESC) supports
driver safety . It reduces the risk of slipping and
improves d riving stability. ESC detects critica l sit ­
uations such as the vehicle oversteering and un­
dersteer ing or the wheels are spinning. The vehi­
cle is stabilized by apply ing the brakes or reduc ­
ing engine torque . When the ESC engages, the
G1 indicator light b links in the instrument clus­
ter.
T he follow ing systems are integrated in the ESC:
Ant i-loc k bra king s ystem (ABS)
ABS prevents the whee ls from locking when brak­
ing. The vehicle can still be steered even during
hard brak ing. Apply steady pressure to the brake
pedal. Do not pump the pedal. A pulsing in the
b rake pedal indicates that the system is act ing to
stabilize the vehicle .
Brak e a ssist s ystem
The brake assist system can decrease braking dis­
tance. It increases brak ing power when the driver
presses the brake pedal quickly in emergency sit­
uations . You must press and hold the brake pedal
unti l the dangerous sit uat io n is ove r.
Anti-Slip Regulation (ASR )
ASR reduces eng ine power when the drive wheels
begin spinning and ad apts the force to the road
conditions . This makes it easier to start, acceler ­
ate and dr ive up hills .
Electronic differential lock (EDL )
The EDL applies the brakes to a whee l that starts
spinning and transfers the drive power to the
other driving wheel or wheels ( if the veh icle is
equ ipped w ith all wheel dr ive*) . This function is
n ot available at higher speeds .
0 ~ In extreme cases, EDL automatically switches off
~ to keep the brake on the braked wheel from over-N
8 heat ing . The vehicle is still work ing correctly . EDL 0
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Intellig ent Technology
will swi tch on again automatically when condi­
tions have returned to normal.
Steering recommendation
T he ESC he lps to s tabilize the vehicle by cha nging
t h e steer ing torque .
Selective wheel torque control
Se lective wheel torque control is used when driv­
i ng on curves . The front whee l on the ins ide of
t h e curve or both wheels on the i nside of the
c ur ve are braked se lectively as needed. This al­
lows mo re prec ise dr iving in c urves .
Automatic post -collision braking system
The "automat ic post -collis ion braking system"
can help to reduce the risk of sliding and of addi­
tiona l co llisions after an accident.
If the a irbag
contro l modu le detects a collision above a certa in
vehicle speed, the ve hicle is br ake d by the ESC.
The vehicle does not brake automatically if:
- the dr iver presses the acce lerator pedal, or
- the bra king fo rc e generated by the pressed
brake pedal is greater than the braking force
that would be in itiated by the system, or
- the ESC, the brake system or the veh icle electri­
cal system are not functioning.
A WARNING
- The ESC and its integrated systems cannot
overcome the lim its imposed by natura l
phys ica l laws. This is especially impo rtant
on slippery or wet roads. If the systems be­
gi n a cting to s tabilize yo ur vehicle, you
should immedi ately alter your speed to
match the road and traffic conditions. Do
not let the inc reased safety provided tempt
you into taking risks. This could increase
your r isk o f a collis ion.
- Please note the r isk of a coll is ion increases
when dr iv ing fast, especially t hrough curves
and on slippery or wet roads, and when dr iv­
ing too close to objects ahead. The ESC and
its integrated systems cannot always pre ­
vent co llisions - there is st ill a risk of acci­
dents!
89

A WARNING
You should only switch offroad mode on or
switch ESC/ ASR off if your driving abilities
and the traffic conditions perm it. There is a
risk of s lid ing .
- The stabilization function is limited when
offroad mode is switched on . The driving
wheels could spin and the vehicle could
swerve, especially on slick or s lippery road
surfaces.
- There is no vehicle stabilization when ESC/
ASR are switched off.
Hill descent assist
Appl ies to: vehicles with hill hold assist
Hill descent assist makes it possible to drive
down a hill at a constant speed.
Fig. 97 Center console : hill descent assist butto n
• To switch the hill descent assist on, press the
~ button in the center console c} fig. 97. The
LED in the button turns on.
• Press the button again to switch it off. The LED
in the button turns off .
Hill descent assist brakes all four whee ls auto ­
matically in order to limit speed when driving ei­
ther forward or reverse on hills with a grade up to
approximately 50% .
When hill descent assist is on, the speed your ve­ hicle was traveling when it entered the hill is
maintained . It is only possible to switch on the
assist when driving slower than 37 mph (60 km/
h). The assist begins shortly after you start driv-
e '.:: ing and continues up to approximate ly 19 mph
N r--. (30 km/h) . T he driver can increase or decrease N .... 0 0 ::, (X)
Intelligent Technology
the vehicle speed within these limits by pressing
the accelerator or brake pedal.
However, there must be enough tract ion. Hill de­
scent assist
cannot function as expected, if for
example the hill is icy or if the surface is loose
¢,&. .
A blinking indicato r light. in the instrument
cluster will indicate if the system if actively regu­
lating a specific speed up to approximately
19 mph (30 km/h). The indicator light stays on
continuously when in the ready mode.
The system does not work at speeds between 19
and 37 mph (30 and 60 km/h) . The system is
then in ready-mode . This is indicated by the LED
in the button turning on. The system automat i­
cally switched off when you drive faster than 37
mph (60 km/h) . The LED will also turn off in this
scenario .
Hill descent assist is automatically activated un­
der the following conditions:
- the LED in the button turns on
- the vehicle speed is lowe r than 19 mph (30 km/
h)
- the incline angle is at least around 10%
A WARNING
-
-Always adapt your speed to the weather,
road and traffic conditions. Do not let the
increased safety provided tempt you into
taking risks, because this increases the risk
of an accident.
- The hill descent assist system cannot over­
come the laws of physics. Your driving style
must always be adapted to the current road
and traffic conditions .
- Hill descent ass ist may not be able to hold
your vehicle at a constant speed under all
conditions while dr iving on a hill (for exam ­
p le if ground under the vehicle is loose).
Brakes
New brake pads
New brake pads do not achieve their full braking
effect during the first 250 mi (400 km) . They
must be "broken in" first . However, you can
IJ,,
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Intelligent Technology
compensate for the slightly reduced brak ing
force by pressing firmly on the brake peda l. Avoid
heavy b raking during the break -in per iod .
Wear
Brake pad wear depends largely on the way the
veh icle is driven and on operat ing cond it ions.
This is especially t rue if you are driving frequently
in the city and on c urves or with a sporty driving
style.
Operating noise
Noises may occur when br aking depend ing on the
speed, b raking force and outs ide cond itions such
as temperature and humidity.
Effect of water or road salt
I n ce rtain s ituations, fo r example after driving
through water, in heavy ra in, afte r ove rnig ht con­
densat ion or after washing your car, the braking
effe ct can be red uced by moisture or ice on the
b rake rotors and brake pads. The brakes must be
"dr ied" first with a few careful brake applica ­
tions.
At highe r speeds and with the windshie ld wipers
turned on, the brake pads press against the brake rotors for a short amount of time . This action,
which is not felt by the driver, happens at regular
intervals and ensures a better reaction time for
the brakes in wet weather.
The braking effect can also be reduced if you are
driving on salted roads and you do not apply the brakes for long periods of time. The laye r of salt
on the brake rotors and brake pads must be worn
off first when t he brakes a re applied ¢ ,& .
Corros ion
L eaving the vehicle par ked for long periods of
time, low mi leage and avo id ing heavy brak ing
can contribute to corrosion on the brake rotors
and to d irty b rake pads .
If you usually avoid heavy b raking or if there is
corros ion present, occasional heavy braking at
h igh speeds is recommended to clean the brake
rotors and pads¢,&.
92
Brake system malfunction
if you no tic e th at the b rake peda l t ravel has sud­
denly gotten larger, then a brake ci rc u it may have
failed ¢.&. .
Low brake fluid level
When the b rake fluid level is low, malfunctions in
t h e b rake system may occur. The b rake fl uid leve l
i s e lec tron ically moni to red.
Brake booster
The brake booster amplifies the pressure you ap­
ply to the brake pedal. It only works when the en­
gine is runni ng ¢ ,& .
.8, WARNING
-On ly app ly the bra kes for the p urpose o f
cleaning the brake sys tem w hen road and
t raffic conditions permi t. You mus t not en­
danger other roa d users . This increases the
risk of an accident.
-
- Never let the ve hicl e roll whi le the engine is
stopped because t his increases the risk of an
accident .
(D Note
- Never let the brakes "rub'' by pressing the
peda l lightly when braking is not actually
necessary . This causes t he b rakes to over ­
heat and increases braking distance and
causes wear.
- Be fore driving downhill a long d istance on a
steep hill, decrease your speed and select a lower gear. This makes use of the engine
brak ing effect and relieves the brakes . If
you need to bra ke add itiona lly, bra ke in in­
te rvals and not cont inuous ly.
(D Tips
- If the brake booster is not working, you
must press the b rake peda l with much more
forc e than normal.
- If you retrofit your veh icle with a front spo il­
er , wheel covers or sim ila r i tems, make su re
t h at the air flow to the fro nt wheels is not
inter rup ted. O therwise t he b rake system
c an be come too hot.

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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

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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

fuel, oil, coolant and other fluids plus maximum load. The maxi­
mum load includes the number of
passengers that the vehicle is in­
tended to carry ("seating capaci­
ty") with an assumed weight of
1 50 lbs. (68 kg) for each passen­
ger at a designated seating posi ­
tion and the total weight of any
luggage in the vehicle. If you tow
a trailer, the weight of the trailer
hitch and the tongue weight of
the loaded trailer must be includ­
ed as part of the vehicle load.
The
Gr oss Axle Weight R ating
("GAWR") is the maximum load
that can be applied at each of the
veh icle's two axles.
The fact that there is an upper limit to your vehicle's Gross Vehi­
cle Weight Rating means that the
total weight of whatever is being
carried in the vehicle (including
the weight of a trai ler hitch and
the tongue weight of the loaded
trailer) is limited. The more pas­
sengers in the vehicle or passen­
gers who are heavier than the
standard weights assumed mean
that less weight can be carried as
~ luggage.
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Wheels
The Gross Vehicle Weight Rating and the Gross Axle Weight Rating
are listed on the safety compli ­
ance sticker label located on the
driver's side B-pillar.
_&. WA RNIN G
Overloading a vehicle can cause
loss of vehicle control, a crash
or other accident, serious per­
sonal injury, and even death.
- Carrying more weight than
your vehicle was designed to carry will prevent the vehicle
from handling properly 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 vehicle
within a safe distance.
- Tires on a vehicle that has
been overloaded can fail sud­
denly, including a blowout and
sudden deflation, causing loss
of control and a crash.
- Always make sure that the to­
tal load being transported -
including the weight of a trail­
er hitch and the tongue
weight of a loaded trailer -
does not make the vehicle heavier than the vehicle's
Gross Veh icle Weight Rating .
179