2018 AUDI A4 ECU

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Trailer towing 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 additional load will affect durability, econo­ my and performance.
Trailer towing not only places more stress on the
vehicle, it also calls for more concentration from
the driver.
For 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 trailer weight. The hitch must be suitable
for your vehicle and trailer and must be mounted
securely on the vehicle's chassis at a technically
sound
location . Use only a trailer hitch with a re­
movable ball mount . Always check with the trail­
er hitch manufacturer to make sure that you are
using the correct hitch.
Do not use a bumper hitch.
The hitch must be installed in such a way that it
does not interfere with the impact -absorbing
bumper system. No modifications should be
made to the vehicle exhaust and brake systems .
From time to time, check that all hitch mounting
bo lts remain securely fastened.
When you are not towing a trailer,
remove the
tra iler hitch ball mount . This prevents the hitch
from causing damage shou ld your vehicle be
struck from beh ind ¢
,&. .
Trailer brakes
If your trailer is equipped with a braking system,
check to be sure that it conforms to all regula­
tions .
Trailer towing
The trailer hydraulic brake system must not be
directly connected to the vehicle's hydraulic
brake
system ¢.&. .
Safety chains
Always use safety chains between your vehicle
and the trailer.
Trailer lights
T ra iler lights must meet all regulations . Be sure
to check w ith your author ized Audi dealer for cor­
rect wiring, switches and relays.
Mirrors
If you are unable to see the traffic behind you us­
ing the regular outside mirrors, then you
must in­
stall extended mirrors. It is important that you
always have clear vision to the rear.
,8. WARNING
After removing the traile r hitch, do not store
it in your vehicle. In case of sudden braking,
the hitch could fly forward and injure you or
your passengers.
Operating instructions
Maximum trailer weight
A trailer for your vehicle is limited to a typical
class 1 or class 2 trailer.
Trailer load distribution
Be sure the load in the trailer is held securely in
place to prevent it from shifting forward, back­
ward or sideways.
Never allow a passenger to ride in a trailer ¢.&.
in Driver messages on page 100 .
Engine cooling system
Towing a trailer 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 cooling system has enough fluid.
Tire pressure
When towing a trailer, inflate the tires of your
vehicle to the tire pressure listed under "Full
load" on the label ¢ page 344. Inflate trailer
99

Ass is tan ce sys tems
your steering whee l ang le as long as you are ac­
tively steering. Evasive steering support is availa­
b le at speeds between approximately 20 mph
(30 km/h) and 90 mph (150 km/h).
Tu rn assist
When start ing to drive and up to speeds of maxi­
mum
6 mph (10 km/h), the turn assist uses a
braking intervention to prevent your vehicle from
colliding with an oncoming vehicle when turning
left or right (available in certain countries). The
braking intervent ion causes your vehicle to stay
in its lane.
A WARNING
-Pre sense front cannot overcome the laws of
physics.
It is a system des igned to assist and
it cannot prevent a collision in every circum­
stance. The driver must always i ntervene.
T he driver is always responsib le for braking
at the correct time. Do not let the increased
safety provided tempt you into taking risks .
This could increase your risk of a collision.
- The system can deploy incorrectly due to
system-specific limits .
- Please note that the sensors and the camera
do not always detect all objects or lane
markings. This increases the risk of an acci­
dent.
- Pre sense front does not react to people, an­
imals or ob jects that are crossing the veh i­
cle's path or that are difficu lt to
detect¢ .&.
in General information on page 109.
-Reflective objects such as guard rails or the
entrance to a tunnel, heavy rain and ice can
affect the fu nction of the radar sensors and
the system's ability to detect a coll is ion risk .
(D Note
The sensors can be displaced by impacts or
damage to the bumper, whee l housing and
underbody. Pre sense front can be impa ired
by this. Have an authorized Aud i dealer or au­
thorized Audi Service Fac ility check their func­
tion.
l ) Th is is not availab le in some countr ies.
122
(D Tips
- You can cancel the braking with increas ing
force that is initiated by the system by bra k­
ing yourself, by acce lerating not iceably or
by swerving.
- Keep in mind that pre sense front can brake
unexpectedly. Always secure any cargo or
objects that you are transporting to reduce
the risk of damage or injury.
- Specific pre sense front functions switch off
when the ESC is restricted or sw itched off
¢ page 147 or the hill ho ld assist" is
switched on
¢ page 148 .
Audi pre sense rear
Description
Applies to : vehicles wi th Aud i s ide ass ist
If the risk of a co llision with a vehicle ahead is de­
tected, the follow ing funct ions can be triggered:
- Reversible tensioning of the front safety belts
at the corresponding speeds .
- Closing the windows
and sunroof*.
- Infla ting the side bo ls ters* on the seat back-
rest.
- Ac tivat ing the emergency flashers with in -
creased frequency
l l.
The message Audi pr e sense. ¢ page 121,
fig. 122
will warn you about the danger.
Audi drive select": the function is not active de­
pending on the mode selected.
A WARNING
- To reduce the r isk of an accident, please
no te t hat the s ide assist* radar sensors do
no t always dete ct every object.
-
- Pre sense rear does not react to people, ani­
mals or objects that a re c ross ing the vehi­
cle 's path o r that are d ifficult to detec t.
- Ref lective objects such as gua rd ra ils, heavy
rain and i ce can impair the func tion of the
radar sensors an d the abili ty to detect a col­
lision risk.

Assistance systems
-when there are visual obstr uctions, such as
glare, reflections or variations in light
- when it is dark
- if the camera window or the windshie ld is
dirty, iced over, damaged or covered
- when driving on snow, ice or loose ground
- in curves
- if the ESC was restricted or switched off
- when towing a tra iler
- when the driver's seat belt is unfastened
- up to ten seconds after switching on the ig-
nition
(D Note
Impacts or damage to the camera mount on
the windshield can disp lace the sensor . Pre
sense city can be impa ired by this. Have an au­
thorized Audi dealer or authorized Aud i Serv­
ice Facility check the ir funct ion.
{D) Tips
- You can cancel the system braking interven­
tion if you accelerate considerably or swerve
away.
- Keep in mind that pre sense city can brake
unexpectedly. Always secure any cargo or
objects that you are transport ing to reduce
the r isk of damage or injury.
- Specific pre sense city funct ions sw itch off
when the ESC is limited or switched
off
¢ page 147 or the hill descent assist* is
switched on
¢page 148.
-When there is a malfunction in the camera,
the pre sense city funct ions also switch off.
Settings in the
Infotainment system
A pp lies to: ve hicles w ith Audi p re se nse
.,. Select in the Infotainment system: IMENU I but­
ton
> Vehicle > left control button > Driver as­
sistance
> Audi pre sense.
Turn on/off Audi pre sense
-the pre sense func­
tions can be turned on and
off.
124
If the system is switched off, it switches on again
automatica lly once the ignition is switched on
again.
Early warning -the early warning can be switch­
ed
off or the pre sense city/front warning point
can be set
( Early /Medium /Late ).
Set the warning time for the early warning to
Early at first . If this causes undesi red early warn­
ings to appear, then set the warning time to
Me­
dium .
The Late warning time should only be set
i n spec ial circumstances, for example, when driv­
i ng with a very dynamic style.
(D Tips
Your settings are automatically stored and as ­
signed to the remote control key being used.
Messages
Applies to: vehicles wi th Audi pre sense
II Audi pre sense: malfunction! Please contact
Service
This message appears when the pre sense func­
tion is affected . For example, th is could be
ca used by a faulty sensor. Drive to an authorized
Audi dealer or authorized Audi Service Facility im­ mediately to have the malfunction corrected.
II Audi pre sense currently restricted . Restrict­
ed sensor vision due to surroundings. See own­
er 's manual
This message appears if the radar sensor and
camera view is obstructed, for example by leaves,
snow, heavy spray or dirt. If necessary, clean the
sensors and the area around the camera
¢ page 109, fig . 108 or ¢page 129, fig. 130 .
II Audi pre sense: currently restricted. Towing
mode
For vehicles wi th a trailer hitch installed at the
factory, the pre sense rear functions switch
off
when the electrical connector at the socket is
plugged in. There is no guarantee the functions
will switch
off when using a retrofitted trailer
hitch.
II Audi pre sense: currently restricted

Multi Media Interface
Option s menu :
using the opt ions menu, you can
select and conf irm context-dependent functions
as well as sett ings within a menu item (such as
Rad io ).
R eq uiremen t: the options menu symbol B must
be disp layed i n the I nfotainment system display
¢ fig . 164.
Opening /clo sing the option s menu : press the
right control button
~ fig. 164.
Information about paths
This guide sho ws you at a glan ce the paths for
opening a desired menu and its settings and
functions.
Example of a path
• Se lect : IRADIO I button> left cont rol knob> FM.
Following the path
• Press the I RADIO I button .
• Press the left co ntro l button.
• Turn the control knob to the FM menu item to
select it .
• Press the con trol knob to confirm the se lected
FM menu item.
• The selec ted and confirmed f un cti on is execu t­
ed. In this example, the FM frequency band is
set .
158
MMI touch
MMI touch control pad
Applies to: vehicles with MMI touch
You can enter data using handwriting recogni­
tion on the
MMI touch control pad.
Fi g. 16 5 E xamp le : en te ring a navigat ion dest inat ion us ing
t h e MM I touch
The M MI touch cont rol pa d is on the surfa ce with
the con trol knob
¢ fig. 165 .
Entering numbers, letters, and symbols
Applies to: vehicles with MMI touch
The MMI touch allows you to enter data on the
MMI touch control pad u sing handwri ting recog­
nition .
Fig. 166 D isp lay whe n MMI to uch is active

Audi connect (Infotainment)
You must have connected your vehicle with
myAudi
¢ page 188.
.,. Se lect: I MENU I button> Audi connect> Twitter
> left contro l button > desired function (for ex­
amp le,
Trends ).
The following categories can be selected in the
Twitter menu:
- My tweets : News Feed and the Tweets you have
posted are listed.
- Home: the Tweets for everyone you follow are
displayed .
-Trends: topics on Twitter that are currently
popular within a country .
Different functions are available depending on
the Twitter category you have selected:
- New tweet : you can post a new tweet using
pre-made templates or using myAudi tem­
plates that you have created yourself.
- Refresh : the selected Twitter function is re­
freshed.
- Favorite: set a Tweet as favorite to show you
liked it.
-Retweet : you can quote a Tweet to share it with
others.
(D Tips
- Other settings such as account, language,
Tweet security and location settings
cannot
be changed in the MMI. These changes must
be made on the Twitter website.
- You can only connect
one Twitter account
with your myAudi account.
- Audi connect (Infotainment) makes it possi­
ble to access Tw itter . Permanent avai lability
cannot be guaranteed, because that de­
pends on Twitter.
Travel (travel guide)
Ap plies to veh icles with Audi co nnect (Infotainment)
You can use the Audi MMI connect opp to store
points of interest on your mobile device (such as
a smartphone) and then use them for route
guidance in the
MMI.
Requirement:
192
The Audi MMI connect app must be installed and
open on your mobi le device .
You must be logged into your myAudi account in
the
Audi MMI connect app and you must have se­
l ected your vehicle.
The Wi-Fi function on your mobile device and on
the
MMI must be switched on.
The
MMI must be connected to the network .
"'Press: !MENU ! button> Audi connect> left con-
trol button >
Information category > Travel.
After opening the travel guide, trave l tips in your
area wi ll be displayed including current ratings as
well as the corresponding category .
"' Press the left control button to change the cat­
egory (such as bars nearby).
A WARNING
-
-It is o nly safe to use tablets, laptops, mo­
bi le devices and other similar devices when
the vehicle is stationary because, like all
loose objects, they could be thrown around
the inside of the vehicle in a crash and cause
serious injuries. Store these types of devices
secure ly while driving.
- Do not use any wire less devices on the front
seats within range of the airbags while driv­
ing. Also read the warnings in the chapter
¢ page 275, Front airbags .
Q) Note
Always fo llow the information found in ¢@ in
Wi-Fi hotspot on page 194.
(D Tips
Units of measurement, language settings and
time are shown in the Infotainment system
display based on how they were set in the
MMI system settings ¢ page 248.
Audi connect (Infotainment) in navigation
App lies to : vehicles wit h a navigation system and Audi co n·
nec t (In fo ta inm ent)
... Select: !MENUI button> Audi connect > left
control button >
Navigation .

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Configuring the data
connection
Applies to vehicles with Aud i connect (Infotainment)
The data connection for Audi connect Infotain·
ment services is pre-configured at the factory .
However , if a configuration should be necessary,
you can adjust the following settings .
.,. Select: I MENU I button > right control button>
Connection manager .
.,. Select: right control button > Online settings>
Data connection settings .
Using the Data connection settings menu, you
can set when an Internet connection should be
made . T he Internet connect ion disconnects auto­
matica lly on ce the requested Audi connect Info­
tainment service no longer requires any data.
The fol low ing settings can be selected:
Audi connect (MMI)
With the Audi connect (MMI) f unction, you can
Allow or Deny the use of Audi connect Infotain ·
ment services if the connection is set to No re·
quest or With request .
Wi-Fi devices*
Using the Wi-Fi devices function, you can Allow
or Deny a connection to the In ternet.
A WARNING
-As the driver, do not allow usage of the Wi­
Fi hotspot to distract you from driving, as
this could increase the risk of an accident.
-It is only safe to use tablets, laptops, mo·
bile devices and other s imilar dev ices when
the vehicle is stationary because, like all
loose objects, they could be thrown around
the inside of the vehicle in a crash and cause
serious injuries . Store these types of devices
securely whi le driving.
-Do not use any wireless devices on the front
seats within range of the airbags while driv·
ing. Also read the warnings in the chapter
t::> page 275, Front airbags.
Audi connect (Infotainment)
(D Note
Always fo llow the information found in ~0 in
Wi-Fi hotspot on page 194.
Audi connect (Infotainment) general
information
Audi connect Infotainment services
Applies to vehicles wit h Aud i connect (Infota inment)
@ Tips
-You can only use services supported by Aud i
connect (Infotainment) if you have the
op·
tional MMI Navigation plus equipment w ith
MMI touch* and Audi connect (Infotain­
ment).
-Use of the L TE* mobile network standard is
not available in every country. Contact an
authorized Audi dealer or authorized Audi
Service Facility or your cell phone service
provider for additional information.
-Usage of Audi connect Infotainment serv­
ices depends on the ava ilability of services
through third party providers.
-Audi connect Infotainment services are only
availab le within the cell phone network cov­
erage from your cell phone service provider.
-Audi connect Infotainment services are
available in the USA. Audi connect Infotain·
ment services are currently not availab le in
Canada or in Mexico.
- Also read the information in the chapter
t::> page 175, Telephone.
- Availability, scope, providers, screen display
and costs of services may vary depending on
the country, model, model year, end device
and rates. For add itional information, v is it
www.audiusa.com .
-An initial registration/activation on the
myAudi platform at
www.audiusa.com/
myaudi
is requ ired to use individual serv­
ices . You can contact an authorized Audi
dealer or Aud i connect (Infotainment) cus­
tomer service at (87 7) SOS-AUDI (2834) to
195

Audi connect (Infotainment)
receive information on options for expand­
ing your usage and any costs that may re­
sult.
- The Audi connect Infotainment services are
a Wi-Fi/Internet-based system . If the sys­
tem does not function correctly even
though all of the requirements are met, please try again later or contact Audi con­
nect customer service at 877-505-AUDI
(2834).
- For detailed information on Audi connect
(Infotainment) and the Terms of Use, refer
to
www.audiusa.com .
Data protection
App lies to veh icles with Audi connect (Infotainment)
(D Tips
- You can find additional information in your
MMI in the options menu for the selected
Audi connect Infotainment service and also
on line at
www.audiusa.com.
- Your privacy is important to us.
-AUDI AG collects, processes, shares
and
transmits your personal information in ac­
cordance with legal regulations in order to
ensure proper function and availability of
the individual Audi connect Infotainment
services. You can view the complete, current
and valid Audi connect data protection poli­
cy in your MMI. The myAudi platform is
available for to you to activate additional
Audi connect Infotainment services and to
transfer data to your vehicle, among other
services. A one-time registration is required
to establish a connection to your vehicle.
For this purpose, AUDI AG collects, process­
es, transmits and uses your required per­
sonal information as required for you to use
the services provided by AUDI AG. Your in­
formation is not distributed to third parties .
Using your cell phone with your myAudi
196
platform allows you to transmit data for
your Audi connect Infotainment services
functions to your vehicle and you can allow
specific vehicle data to be transmitted from
your vehicle.
- By activating special information services
that are part of your Audi connect portfolio,
you can use these functions directly in your
vehicle by entering data to confirm your identity (to use social networks, for exam­
ple) . To do this, the identification informa­
tion you provided is forwarded with the re­
quest to the respective service provider.
T hen you can access your personal content
using a secure connection. This content is
displayed in the vehicle for your use. Your
personal content is not stored within Audi
AG. The necessary connection information is processed and used for providing services
and the proper function of the services in
accordance with applicable legal guidelines.
- You can find additional information in your MMI in the options menu for the selected
Audi connect Infotainment service and also
online at
www.audiusa.com.
- By providing Audi connect Infotainment
services, Audi of America is authorized to
collect , process, transmit and transfer infor­
mation about you and your vehicle. Addi­
tional information can also be found in your
MMI in the options menu for the selected
Audi connect Infotainment service.
- Information on our data protection meas­ ures in conjunction with the mobile Audi
connect (Infotainment) application can be
found in the application's privacy policy. For additional information about the
www.audiusa.com/myaudi website or oth­
er applications, websites or online services
connected to Audi, visit
www.audiusa.com/
privacy .

Audi connect vehicle control
Audi connect vehicle
control
Introduction
Applies to veh icles with Audi co nnect vehicle control
With the Audi connect vehicle control services 1>,
you can access various information or use individ­
ual functions in the
Audi MMI connect app or in
myAudi .
Audi connect vehicle control includes the follow­
ing services:
- Remote locking and unlocking ¢
page 199.
-Vehicle status report <:!>page 199 .
-Parking location o page 199.
-Geofencing Alert r::!> page 200.
-Speed Alert o page 200 .
-Valet Alert o page 200 .
- Stolen Vehicle Locator o page 200.
-Online Audi service request o page 200.
(D Tips
-Accessing specific data or controlling func­
tions remote ly depends on the charge level
of the vehicle battery. Therefore, these
funct ions only have limited availability after
switching off the ignit ion.
- The services are provided through a SIM
card installed in the vehicle. The cost of the
call and data connections is included in the
price for the services . Services are provided
assuming that the cell phone network re­
quired for the installed S IM card is funct ion­
in g and ready to operate. The available serv­
ic es set by Aud i AG are only available within
the cell phone network coverage area for
the cell phone service provider selected by
Audi AG .
- You can also find more information on Audi
connect on line at www .audiusa .com .
ll In pr ep aratio n at t he tim e of p rinting. The ava ilab ilit y o f
the serv ice s offe re d depends on th e co untry and may
c han ge ove r tim e.
198
Setup
Applies to vehicles w it h Aud i connect vehicle control
To use Audi connect vehicle control services l),
please note the fo llowing :
Creating and verifying a user account
""Create an account at www.audiusa.com/myaudi
and verify it.
Setting a key user in the vehicle
Requirements : the ignit ion must be switched on .
Anothe r key user must not be set in the veh icle .
If necessary, reset the key user ¢
page 199.
""Select in the Infotainment system: IMENU ! but-
ton >
Audi connect > if necessary, Display
available functions >
right control button>
Audi connect user management > Key user >
Set key user .
"" Enter the user name for your ve rified account
and enter the IO-digit vehicle code. You can rub
the key tag for your remote control key to re­
veal the vehicle code
r::!> page 38.
"" Select and confirm Log in .
You can now use the veh icle control services
through the
Audi MMI connect app or through
www.audiusa.com/myaudi .
Using vehicle control services in the Audi
MMI connect app
Requirement: your mobile devices must be com­
patible.
"" Insta ll and start the
Audi MMI connect app on
your mobi le device .
"" Log in to the
Audi MMI connect app using your
user name and Audi online password and select
your vehicle .
(D Tips
-Store the vehicle code in a secure place. It
may be necessary to re-enter the vehicle
code.