engine AUDI A3 CABRIOLET 2016 Service Manual

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Trailer mode Driving with a trailer
General information
Your Audi was designed primarily for passenger
transportation .
If you plan to tow a trailer, please remember that
the additiona l load will affect durability, econo­
my and performance.
T railer tow ing not only p laces more stress on the
vehicle, it a lso calls for more concentration from
the dr iver.
F or this reason, always follow the operating and
driving instructions provided and use common
sense.
Technical requirements
Trailer hitch Use a weight -carrying hitch conforming to the
gross tra iler weig ht. The h itch must be suitab le
for your vehicle and tra iler and must be mo unted
securely on the vehicle's chassis at a technically
sound
location . Use on ly a trailer hitch with a re­
movable ba ll mou nt. Always che ck wit h the t rail­
e r hitch manufac turer to make s ure that you are
usi ng the correct hitch .
Do not u se a bumper hitch .
The hitc h must be installed in such a way t hat it
does not interfere with the impact -absorbing
bumper system . No modifications should be
made to the vehicle exhaust and brake systems .
Fr om time to time, chec k that a ll hitc h mount ing
bo lts rema in securely faste ned.
When you are not towing a trailer,
remove the
tra iler hitch ba ll mount . This prevents the hitch
from ca using damage s hou ld your veh icle be
s truck from beh ind
~ ,&. .
Trailer brakes
If your trailer is equipped with a braking system,
check to be su re that it conforms to all regula­
tions .
Trailer mode
The t rai ler hydra ulic brake sys tem must not be
directly connected to the vehicle's hydra ulic
bra ke system.
Safety chains
Always use safety ch ains be tween your ve hicle
and the trailer.
Trailer lights
T ra ile r ligh ts must meet all regulations . Be sure
to chec k w it h your Aud i dea le r fo r correct wir ing,
swi tches and relays .
Mirrors
If you are unab le to see the traffic behind you us­
i ng the regular outside mir rors, then you
must in­
sta ll extended mirro rs . It i s important that you
always have clear vision to t he rear.
,8. WARNING
Afte r remov ing the tra ile r hi tch , do no t st o re
i t in yo ur vehicle. In ca se of sudden brak ing,
the hitch could fly fo rward and injure you or
your passengers .
Operating instructions
Maximum trailer we ight
A tra iler for your vehicle is lim ited to a typical
class 1 or class 2 trailer.
Trailer load distribution B e sure the load in the tra ile r i s held se curely in
pla ce to p reve nt i t from shifting forward, bac k­
ward or si deways.
Never allow a passenger to ride in a trailer~.&.
in Driving instructions on page 86.
Engine cooling system
Towing a tra iler makes the engine work harder. It
is important that the cooling system's perform ­
ance is up to the additional load . Make sure that
the coo ling syst em has enoug h flu id.
Tire pressure
When towing a trailer, inflate the tires of your
vehicle to the cold tire pressure listed under
"Full ..,.
85

Trailer mod e
load" on the la bel located on the driver's side B ­
pillar (visib le when the door is open) . Inflate
tra iler tires to trailer and tire manufacturers'
specif ications.
Lights
Check to make sure both vehicle and t railer lights
are working p roper ly.
Safety chains
Be sure t railer safety chains are properly connect­
ed from the trai le r to the hi tch on the veh icle.
L eave enough sla ck in the cha ins to permi t turn­
ing corners. When yo u install safety chains, ma ke
sure they wi ll not drag on the road when yo u are
driving .
The cha ins s hou ld cross under the trailer tongue
t o prevent it from dropping in case of separation
from the h itch .
Driving instructions
Driving with a trailer always requires extra care
and consideration .
To obtain t he best poss ible handling of vehicle
and traile r, please note the fo llow ing :
.,. Do not tow a loaded trailer when your car itself
is not loaded.
.. Be especi ally ca ref ul when pass ing othe r
vehicles.
.. Observe speed limi ts .
.. Do not d rive at the maximum permissible
speed.
.. Always apply brakes early.
.. Monitor the temperature gauge .
Weight distribution
Towing a loaded t railer w ith an empty car res ults
in a high ly unstable distribution of weight . If this
cannot be avoided, drive at very low speeds on ly
to avoid the risk of losing steering control.
A "balanced" rig is easie r to operate and cont rol.
This means that the tow vehi cle should be loaded
to the extent possible and permissible, while
keep ing the tra iler as light as possib le under the
circumstances. Whenever possible, transfer
some cargo to the l uggage compartment of the
86
tow veh icle wh ile observing tong ue load require ­
ments and vehicle loading considerations.
Speed
The higher the speed, the mo re diff icu lt i t be­
comes for the driver to con trol the r ig. Do not
drive at t he maxim um permissible speed. Reduce
you r speed even more if load, weather or wind
con dit ions are unfavorab le - partic ularly when
go ing downh ill.
Reduce vehicle speed
immediately if the trailer
shows the slightest sign of swaying.
Do not try
to stop the swaying by accelerating.
Observe speed limi ts. In some areas, s peeds fo r
vehicles towing trailers are lower than for regular
vehicles .
A lways apply bra kes early. Whe n driving down­
hill, shift in to a lower gea r to use the engine
b raki ng effect to slow the vehi cle. Use of the
brakes alone ca n cause them to over heat and fai l.
Coolant temperature
The coolant temperature gauge 9 page 12 must
be obse rved caref ully. The coolant temperature
c a n incre ase if yo u drive o n long incl ines in a low
gear a t high engine speeds . Red uce your speed
immediately if the LE Ds in the top part of the dis­
play turn on .
Fo r more info rm ation abou t indicator lights, re­
fer to .
¢ page 16 .
A WARNING
-
Anyone not prope rly restrai ned in a moving
vehicle is at a much greate r risk in an acci ­
dent. Never let anyone ride in your car who is
not properly wear ing the restraints provided
by Aud i.
Trailer mode notes
Important to know
Your vehicle handles differen tly when towing a
trailer because o f the additiona l weight and di f­
ferent weight distribution. Safety, performance
and economy will g reatly depend on how caref ul-
l y you load your trai ler and operate you r rig. ..,_

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Before you actually tow your trailer, practice
turning, stopping and backing up in an area away
from traff ic. Keep practicing until you have be­
come completely familiar with the way your vehi­
cle-trailer combination behaves and responds.
Backing up is difficult and requires practice.
Backing up with a trailer generally requires steer­
ing action opposite to that when backing up your
vehicle without a trailer.
Maintain a greater distance between your vehicle
and the one in front of you. You wi ll need more
room to stop. To compensate for the trailer, you
will need a larger than normal turning radius.
When passing, remember that you cannot accel­
erate as fast as you norma lly would because of
the added load. Make sure you have enough room
to pass. After passing, allow plenty of room for
your trailer before changing lanes again.
Avoid jerky starts, sharp turns or rap id lane
changes.
@ Tips
- Do not tow a trailer during the break-in peri­
od of your vehicle.
- If you tow a trailer, your Audi may require
more frequent maintenance due to the ex­
tra load
<=> page 2 53.
Parking on a slope
Do not pork on a slope with a trailer. If it cannot
be avoided, do so only ofter doing the following:
When parking:
.. Apply the foot brake .
.. Have someone pla ce chocks under both the ve­
hicle and the trailer wheels .
.. With chocks in place, slowly release the brakes
until the wheel chocks absorb the load .
.. Turn the wheels towards the curb .
.. Apply the parking brake .
.. Select the P selector lever position.
When restarting after parking :
.. Apply the foot brake.
.. Start the engine .
.. Select the D/S selector lever position.
Trailer mode
.. Release the parking brake and slowly pull out
and away from the wheel chocks.
.. Stop and have someone retrieve the whee l
chocks.
{!) Tips
If you move the selector lever of the automat­
ic transmission to P before applying the park­
ing brake and before blocking the wheels, you
may have to use more force later to move the
lever out of the P posit ion.
87

Ass is t
Assist
Electronic speed limiter
Applies to: vehicles with electronic speed limiter
Your vehicle may be factory equipped wi th tires
that are rated for a maximum speed of 130 mph (210 km/h). This is less than the maximum speed
of your vehicle. To reduce the risk of sudden tire
fa ilure and loss of control if the veh icle is operat­
ed at excessive speeds, your vehicle also has an
electron ic speed limiter. The electron ic speed
lim iter prevents your veh icle from going faster
than the t ire speed rating. For mo re information
~page 211.
If the engine control unit receives faulty vehicle
road speed s ignals, the Ma lfunction Ind icator
L amp (MIL)
¢;5 will illum inate. If this occurs,
con ta ct the nearest au thori zed A ud i d ealer for
assis tance.
A WARNING
Always observe the posted speed limits and
adjust your speed to s uit prevailing road, traf­
fic and weather cond itions. Never drive your
vehicle faster than t he maximum speed rat ing
of the tires installed.
Speed warning system
Introduction
The speed warning system helps you to stay un­
der a specified maximum speed.
-
The speed warning system warns you if you are
exceeding the maximum speed that you have set .
You will hear a wa rning tone when your speed ex­
ceeds the stored va lue by app roxima tely 3 mph
(3 km/h). The. (U SA mode ls)/ . (Canada
models) ind ic a tor light and the message
Speed
limit e xceeded!
appear in the inst rument cluste r
disp lay at the same time. The./. indicato r
light t urns off when the speed decreases be low
the stored maximum speed.
Se tting a thresho ld is recommended if you would
like to be reminded when yo u reach a certain
maximum speed. Situations where you may want
to do so include driving in a country wit h a gener-
88
al speed limit or if there is a spec ified maximum
speed for winter tires.
(D Tips
Regar dless o f th e speed war ning system, you
shou ld always monitor your spee d using the
speedometer and make s ure yo u are fo llow ing
the legal speed limit .
Setting the threshold
You can set, change and delete the threshold in
the MMI .
.. Sele ct: the I M ENU I button >Car > Systems*
control button > Drive r assi stance > Speed
wa rning.
You can se t any thresho ld between 20 mp h
(3 0 km/h) and 150 mph (2 40 km/ h). Settings
can each be adj usted in increments of S mph ( 10
km/ h).
Cruise control system
· Description
Applies to: vehicles with cruise control system
The cru ise cont rol system ma kes it possib le to
dr ive at a constan t speed star tin g at 15 mph
(2 0 k m/h).
The speed is kep t constant by mod ifying engine
power or through an active bra ke interven tion.
A WARNING
- Always p ay att ention to the tr affi c ar ou nd
you whe n the cruise co ntro l is in opera tion.
Y ou are always responsible fo r your speed
and the distance between your veh icle and
other vehicles.
- For safety reasons, cruise cont rol should not
be used in the city, in stop-and-go traff ic, on
winding roads and when road conditions a re
poor (such as ice, fog, g ravel, heavy ra in and
hyd roplaning), because this inc reases the
ris k of an accident.
- Switch the cruise control off temporarily
when dr iv ing in turning lanes, highway exits
or in constr uct ion zones.
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llJ ACC off: manual control!
This message appears if the vehicle rolls back
when starting on a slight incline, even though
ACC is active. Press the brake pedal to prevent
the vehicle from rolling or starting to move.
Ill ACC: engine speed
This message appears if the driver has not shift­
ed up or down in time when the adaptive cruise
control is braking or accelerating, causing the ve­
hicle to exceed or to not reach the permitted en­
gine speed . The adaptive cruise control turns off.
A chime sounds as a reminder.
•••
Three white dots appear if a setting cannot be se­
lected with the operating lever. For example, this
happens if adaptive cruise control cannot be acti­
vated when stopped because the driver has not fastened the safety belt.
Door open
Adaptive cruise control cannot be switched on
when the vehicle is stationary and the driver's
door is open.
Audi pre sense
Introduction
Applies to: vehicles with Audi pre sense basic or Audi pre
sense front
Within the limits of the system, pre sense basic
and pre sense front can initiate steps to protect
vehicle occupants in certain dangerous situa­
tions.
Critical driving situations can be recognized by
the pre sense front via a network of different ve­
hicle systems and can take steps to prepare the
vehicle occupants for a potential collision.
The pre sense front works with a radar sensor
and a video camera*. It also functions within the
limits of the system when adaptive cruise con­
trol* is switched off.
Assist
General information
General information
Applies to: vehicles with Audi pre sense front or Audi adaptive
cruise control
A WARNING
Also follow the general information found on
~ page 91, General information.
Audi pre sense basic
Description
Applies to: vehicles with Audi pre sense basic
The function of the pre sense basic is activated at
a speed of 20 mph (30 km/h) or higher.
The following functions can be triggered under
certain conditions within the limits of the sys­
tem:
- Tensioning of the safety belts (for examp le,
during heavy braking): the front safety belts have reversible belt tensioners. If a collision
does not occur, the safety belts loosen slightly
and are ready to trigger again.
- Closing the windows (for example when over­
or understeering): the windows close until
there is a small gap open.
Audi drive select: the deployment time is adapt­ ed in dynamic mode.
A WARNING
-The pre sense basic cannot overcome natural
physical laws. It is a system designed to assist
and it cannot prevent a collision. Do not let
the increased safety provided tempt you into
taking risks. This could increase your risk of a
collision.
- The system can dep loy incorrectly due to
system-specific limits.
@ Tips
-Certain pre sense basic functions switch off
when ESC is switched off (sport mode) or
when driving in reverse.
97

Ass is t
- Your settings are automatically stored and
assigned to the remote control key being
used .
Driver messages
Applies to: ve hicles w ith Audi side assist
If the side assist switches off automatically, a
message appears in the instrument cluster dis­
play.
(ij Audi side a ssi st : cur rentl y un ava ilable No
s en so r v isi on
The radar sensors' vision is affected. Do not cover
the area in front of the sensors with bike wheels,
stickers, dirt or other objects . Clean the area in
front of the sensors, if necessary~
page 104,
fig. 105.
@j Audi side assist : cur rently un available
Side assist cannot be switched on temporar ily be­
cause there is a malfunction (for example, the
battery charge level may be too low).
@j Audi side a ssi st : S ystem fau lt!
The system cannot guarantee that it will detect
veh icles correctly and it is switched off. The sen­
sors have been d isplaced or are faulty . Have the
system checked by an authorized Audi dealer or
author ized Audi Service Facility soon .
Audi drive select (drive
settings)
Introduction
App lies to: vehicles with Aud i drive select
Audi drive select makes it possible to experience
d ifferent types of vehicle settings in o ne veh icle .
The drive r can select from three
Comfort , Auto
and D ynam ic modes us ing the te'i:.1 button in the
center console or the MMI to switch between a
sporty and a comfortable driving mode, for ex ­
ample. In the
Ind ividu al* mode, the settings can
be adjusted to your personal preferences. This
makes it poss ible to combine settings such as a
sporty eng ine setting w ith smooth steering.
106
A WARNING ,_
Using Aud i drive select incorrectly can lead to
coll is ions, other accidents and serious inju­
ries.
Description
App lies to: vehicles with Aud i drive se lect
The vehicle setup in each mode depends on the
vehicle's features. However, the engine a nd
steering are a lways affected.
Engine and automatic tr ansmiss ion
Depending on the mode, the engine and auto­
matic transmission* respond more qu ickly or in a
more ba lanced manner to accelerator pedal
movements.
Adapt ive damper s (Audi magneti c ride )*
The adaptive dampers use sensors to record in­
format ion regarding steering movements, brak­
i ng and acceleration operations by the driver,
road surface, driving speed, and load . W ith Aud i
drive select you can adjust the adaptive dampers
spo rty (dynamic), comfortable (comfort) o r bal­
anced (auto).
Ste ering
The steering adapts in terms of steering ass is­
tance. There are d ifferent modes
~page 107.
Ind irect steering that moves easi ly as in comfort
mode is espec ially suited to long d rives on a h igh­
way. The dynamic mode provides sporty, direct
steering.
Fo r vehicles with p rogress ive steering* the steer­
i ng perfo rmance is more agile.
Corn ering light*
The cornering light adjusts when driv ing on
curves at speeds between 6 mph (10 km/h) and 68 mp h (1 10 km/h) . The pivoting act ion and the
li ght ing are also adapted to the mode.
Adapt ive cruise cont rol*
The behavior whe n accelerating can be adjusted
from comfortable to sporty, depending on the
Audi drive select mode . Adaptive cruise control ..,.

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also responds to the driving behavior of the vehi­
cl e ahead in a more cons ervative or sporty man­
ner.
@ Tips
I n some models, the maximum vehicle speed
can only be reached in the auto and dynamic
modes .
Selecting the driving mode
Applies to: ve hicles with Audi drive select
You can choose between comfort, auto, dynamic
and individual*.
Fi g. 10 6 Ce nte r co nsole : d rive se lec t button
Fig. 107 MM I: driv e selec t
Adjusting the Individual mode
Ass ist
.,. To set the mode, press the r:/tc'i button
~ fig . 106 repeatedly until the desired mode is
disp layed i n the instrument cluster. Or
.,. In the MMI, select : the
I MENU I button > Car >
Systems "
control button > Comfort , A uto , Dy­
namic or Individual *.
You can change the driving mode when the vehi­
cle is stationary or while driv ing. If traff ic per­
mits, after changing modes, briefly take your
foot off the accelerator pedal so that the recently
selected mode is also ac tivated for t he engine .
Comfort -provides a comfort-or iented vehicle
setup and is suited for long drives o n highways.
Auto -provides an overa ll comfortab le yet dy­
namic dr iving feel and is suited for everyday use .
Dynamic -gives the drive r a spo rty driving fee l
and is suited to a sporty driving style.
Individual* -~ page 107.
A WARNING
Pay atten tion to traffic w he n ope rating the
d rive select to p revent pote ntia l risk o f an ac ­
cident .
You can adjust the vehicle settings to your personal preferences .
.,. Se lect : the I MENU ! button> Car> Systems *
control button > Set individual contro l button.
Once you select the men u, you will automat i­
ca lly dr ive in the
Individual * mode.
After you have closed the sett ings, you will auto­
mat ica lly dr ive in the
Individual * mode . The equipment in you
r vehicle will determine
which sett ings you can adjus t. The follow ing ta­
ble g ives an overview of t he characteristics .
107

Assist Systems comfort
Engine
and Transmission comfortab le
Steering comfortable
Cornering light* comfortab le
Audi adaptive cruise control* comfortable
Damper control* comfortable
Engine sound* subtle
a) Subt le in th e se lector le ver pos it ion D and sporty in S.
(D Tips
Your Individual* mode settings are automati­
cally stored and assigned to the remote con­
trol key being used.
108
auto dynamic
balanced sporty
balanced sporty
balanced sporty
ba lanc ed sporty
balanced sporty
subtle/sporty a)
sporty

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prevent collisions -there is still a risk of ac­
cidents!
- Press the accelerator pedal carefully when
accelerating on even, slippery surfaces such
as ice and snow. The drive wheels can spin
even when these control systems are instal­
led and this can affect driving stability and
increase the risk of a collision.
Switching on /off
Intelligent Technology
(D Tips
- The ABS and ASR only function correctly
when all four wheels have a sim ilar wear
condition. Different tire sizes can lead to a
reduction in engine power.
- You may hear noises when the systems de­
scribed are working.
£SC turns on automatically when you start the engine.
Fig. 119 Upper center console : ESC button
function of the ESC is limited or switched off . The
amount of stabilization control will differ de­
pending on the level.
The following examples are unusual situations
where it may make sense to switch sport mode
on in order to allow the wheels to spin:
- Rocking the vehicle to free it when it is stuck
- Dr iving in deep snow or on loose ground
The ESC is designed to function in levels. Depend­
ing on the level that is selected, the stabilization
Sport mode on
Behavior
The ESC and ASR stabiliza-
tion functions are limited
~A .
Operation Press the!.$ OFFI button
briefly .
Indicator II turns on.
lights
Driver mes- Stabilization
control (ESC):
sages sport. Warning! Restricted
stability
A WARNING
You should only switch sport mode on or
switch ESC/ ASR off if your driving abilities
and road conditions permit.
- The stabilization function is limited when
sport mode is switched on. The driving
wheels could spin and the vehicle could
ESC/ASR off Sport mode off or
ESC/ASRon
The stabilization function is The full stabilization func-
not available
~ A. ESC and tion of the ESC and ASR is
ASR are switched off. avai lab le again.
Press and hold the!.$ OFFI Press the!.$ OFFI button
button longer than 3 sec- again.
onds.
II and lf'illtla~* turn on . II turns off or'II and
lf'tl•I~~ · turn off.
Stabilization control (ESC):
Stabilization control
off. Warning! Restricted (ESC): On
stability
swerve, especially on slick or slippery road
surfaces.
- There is no vehicle stabilization when ESC/
ASR are switched off.
117

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-On steep slopes, reduce the speed and se­
lect a lower gear or lower selector lever po­
sition. Dr ive as little as possible while press­
ing the brake pedal and avoid putt ing your
left foot on the brake pedal while driving.
Th is co uld cause the brakes to overheat and
impai r the efficiency of the brakes.
- Do not let the brakes "g rind " by a lways
keeping your foot on the brake pedal. This
can cause the br akes to overhea t, i ncrease
wea r and incre ase braking dis tance unneces­
sari ly.
- Certa in wea ther an d operat ing co ndi tio ns
s u ch as dr iving through wate r, d riving in
heavy ra in or d riving after washing your ve ­
hicle can impair the effectiveness of the
brakes . In the w inte r, ice may b uild up on
the brake pads, rotors and drums. Check
these components by braking ca refu lly . Ap­
plying the brakes carefu lly severa l times
dr ies the brakes and removes ice bu ild-up .
- The effic iency of the brakes can also be im­
paired by driving for long st retches on roads
cove red w ith salt without using the b rakes .
Yo u can remove sa lt deposits from the
bra ke rotors and pads by caref ully app lying
the brakes severa l t imes .
-If the front spoiler is damaged or you ins tall
ano ther spoiler, m ake sure the front wheel
bra kes are vent ilated p roper ly. O therwise,
the b rake system could overheat, whic h re ­
duces the ir effectiveness.
- Failure of a brake circuit impai rs b raking
performance, which increases braking dis­
tance . Avoid driving the vehicle . Have it tow ­
ed to the nearest authorized Aud i dealer or
authorized Audi Service Fac ility .
- Never let the vehicle roll while the engine is
stopped because this increases the risk of an
acc ident.
- If the brake booster is not working, you will
have to press m uch ha rder on the brake
peda l to compensate for the lack o f the
booster .
0 Note
-Never let the bra kes " rub" by pressing the
pedal lightly when braking is not really nee-
Intellig ent Technology
essary . This causes the b rakes to overheat
and increases braking distance and causes
wear .
- Before driving on a long st retch with steep
slopes, reduce your speed and shift to the
next lower gear Th is makes use of the en­
gine braking effect and relieves the brakes.
If you need to brake additionally, brake in
intervals and not continuously .
(D Tips
-If the brake booster is not work ing, you
must press the brake peda l with much more
force than normal.
- If you retrof it your vehicle with a front spo il­
er, wheel covers or sim ilar items, make sure
that the air flow to the fro nt wheels is not
inter rupted . Otherwise the b rake system
can become too hot.
Electromechanical
steering
The electromechanical steering supports the
driver's steering movement s.
Power steering adapts electronically based on
the ve hicle speed .
T he veh icle st ill has f ull s teer ing f unct iona lity if
t h e power steering fails or when the engine is
stopped (towing) . To steer, you must app ly m uch
more force than usual.
Indicator lights and messages
• Do not driv e vehicle : steering defective
If this indicator light turns on and stays on and
t hi s message appears , the power steering may
have failed .
Do
not continue dr iv ing . See an author ized Audi
dealer or authorized A udi Se rvice Fac ility for as ­
s istance .
• Do not dr ive vehicle: steering defecti ve
There is a ma lfunction in the e lectronic steering
l ock. You cannot turn the ignition on. ..,.
119