AUDI A4 2018 Service Manual

in the same frequency range (s uch as a ce ll
phone or radio equipment) . A lways check if
your vehicle is locked!
- For an explanation on conformity with t he
FCC regulations in the United States and the
Ind ustry Canada regu lations, see
<::> page 386.
Removing the mechanical key
Fig. 24 Re mote control maste r key: remov ing t he mechani­
ca l key
• Press the release buttons @¢ fig. 24 and re­
move t he mechanical key from the remote co n­
t ro l key .
Using the mecha nica l key, you can :
- Lock/un lock the glove compartment.
- Locking and unlock ing the lockable* rea r bench
seat
<::> page 71.
- Manua lly lock/ un lock the vehicle ¢
page 42.
- Emergency lock the doors ¢ page 4 2 .
- Swi tch the child safety locks on in t he rear
doo rs
¢ page 48, fig . 41 .
LED and battery in the remote control key
Fig. 25 Remote co ntro l key : re m ov ing the battery holder
Open ing and closing
F ig . 2 6 Re mote co ntrol key (rea r side) : re m ovi ng t he bat ·
tery ho lde r
LED in the remote control key
" 0 0 0
i
~
T he L ED @ in forms you of the remote control key
funct ion .
• If you press a bu tto n briefly, the LE D blinks
once.
• If you press and hold a button (convenience
opening/closing), the LED b links severa l times .
• If the LED does not blink, the remote contro l
key battery is dead . The
1:1 ind icator light turns
on and the message
Remote control key : re­
place key battery
appears . Replace the battery
in the remote cont ro l key .
Replacing the remote control key battery
• Press the re lease buttons @¢ fig. 25 and re­
move the mechanica l key .
• Press the re lease buttons ©¢ fig. 26 on the
battery holder while pulling the battery holder
ou t of the remote contro l key in the d irect io n of
t he arrow .
• Inse rt t he new b attery with the "+" sym bol fa c­
ing down.
• Slide t he battery holde r car efully into the re ­
mote contro l key .
• Insert t he mechanical key .
® For the sake of the environment
Discha rged bat teries m ust be disposed o f us­
in g methods that w ill not harm the env iron­
ment. Do not d ispose o f them in ho useho ld
trash.
39

Opening and clo sin g
@ Tips
The replacement battery must meet the same
specifications as the orig inal battery in the re­
mote control key.
Unlocking/locking by remote control
I rn
F ig . 27 Re mote contro l key: bu tton programm ing
• To unlock the vehicle, press the 6:l button
¢ fig. 27.
• To lock the vehicle, press the {D button on ce.
• To unlock the luggage compartment lid, press
the
a button briefly .
• To open the luggage compartment lid, press
and hold the
a button for at least one second .
• To trigger the alarm, p ress t he red I PANIC I but­
ton. The ve hicle horn and emergency flashers
turn on.
• To switch off the alarm, p ress the red I PANIC I
button again .
I f the ve hicle is unlocked and none of the doors,
the hood, or the luggage compartment lid are
opened within 45 seconds, the vehicle locks
again automatica lly. This feature prevents the ve­
hicle from being accidentally left unlocked over a long per iod of time.
The settings in the Infotainment system deter­ mine if the entire vehicle or only the driver's door
is unlocked when unlocking the vehicle
¢page 41.
A WARNING
No one, especially chi ldren, should stay in the
vehicle when it is locked from the outside, be­ cause the w indows can no longer be opened
from the
inside¢ page 42. Locked doors
40
make it more difficult for emergency workers
to get into the veh icle, wh ich puts lives at
risk.
@ Tips
- Only use the remote control key when you
are within view of the vehicle.
- Applies to: vehicles with automatic trans­
mission: the vehicle can only be locked
when the selector lever is in P.
- Do not use the remote control when you a re
inside the vehicle. Otherwise, you could un­
intentionally lock the vehicle. If you then try
to open a door, the anti-theft alarm w ill
trigger. If this happens, press the unlock
button
6:l.
- Only use the pan ic function in an emergen­
cy.
Unlocking/locking with the convenience
key
Applies to : vehicles with convenience key
The doors and luggage compartment lid can be
unlocked/locked without using the remote con­
trol key.
F ig . 28 Door ha nd le: locki ng t he veh icle
Unlocking the v ehicl e
• Grip the door hand le . The door unlocks auto-
matically.
• Pull on the door handle to open the door.
Locking th e vehicle
• Applies to: veh icles with automatic transmis­
sion : Se lect the P position, otherwise the vehi -
cle will not lock .
.,.

.. To lock the vehicle, close the door and touch
the sensor in the door handle
on ce c::> fig. 28 . Do
not hold the door handle while doing this .
You can u nlock/ lock the vehicle at every door.
The remote control key cannot be more than ap­
proximately 4 feet (1.5 m) away from the door
handle. It makes no difference whether the mas­
ter key is in your jacket pocket or in your brief­
case, for example .
If you hold the door handle while locking, this
can impair the locking function.
The doo r cannot be opened for a br ief period di­
rect ly after locking it. This way you have the op­
portunity to check if the doors locked correctly.
The settings in the Infotainment system deter­
mine if the entire vehicle or on ly one of the doors
is unlocked when unlocking the vehicle
c::> pag e 41.
A WARNING
Read and following all WARNINGS c::> &. in De­
scription on page 3
7.
@ Tips
If your vehicle is left standing for a long peri­
od of time, note the following:
-The energy management system grad ually
turns off unnecessary convenience functions
to prevent the vehicle battery from draining
and to mainta in the vehicle's ab ility to start
for as long as possible. You may not be able
to unlock your vehicle us ing the convenience
key .
Central locking switch
Fig. 29 Drive r's door : central loc king switch
Openin g an d clos ing
.. To lock the vehicle, press the l'.D button c::> &_ .
.. To unlock the vehicle, press the @ button.
When locki ng the vehicle with the central lock ing
switch, the following applies:
-Opening the door and the luggage compart­
ment lid from the
outside is not poss ible (for
secur ity reaso ns, such as when stopped at a
light) .
-The LED in the centra l locking sw itch t urns on
when all doors are closed and locked .
- You ca n open the doors individua lly from the
inside by pu lling the doo r handle.
- In the event of a crash with a irbag deploymen t,
the doo rs unlock automat ica lly to allow access
t o the vehicle .
~~ WARNING
-
- The central locking switch a lso works when
the ignition is switched off and automatica l­
ly locks the entire vehicle when the
l'.D but­
ton is pressed.
-The central locking switch is inope rative
when the vehicle is locked from the outs ide.
-Locked doors make it more difficult for
emergency workers to get into the vehicle,
which puts lives at r isk. Do not leave anyone
behind in the vehicle, especially children.
-Read and fo llowing a ll WARNINGS c::> &. in
Description on page 3
7.
(D Tips
Your vehicle locks automatically when it reaches a speed of 9 mph (15 km/h) (Auto
Lock)
c::> page 37. You can unlock the vehicle
again using the
ca button in the central lock­
i ng switch.
Setting the central locking system
In the Infotainment system, you can set which
doors the central locking system will unlock .
.. Select in the Infotainment system: I MENU! but­
ton
> V ehicle > left control b utton > Vehicle
settings > Central lock ing .
Door unlo cking
-you can decide if All doors or
only the
Dri ver 's door shou ld unlock. The
41

Opening and closing
luggage compartment lid also unlocks when All
is selected. If you select Driver 's door in a vehicle
with a convenience key*, only the door whose handle you pull will unlock.
If you select
Driver's door , all the doors and lug­
gage compartment lid will unlock if you press the
m button on the remote control key twice .
Disable rear lid handle -If you select On, the
luggage compartment lid hand le is locked. In
this case, the l uggage compartment lid can be
opened with the
c::$ button on the remote con ­
trol key or w ith the
c::$ button in the driver's
door. In vehicles with a convenience key*, you can
still open the luggage compartment lid using the
handle if an author ized remote control key is
near the proximity sensor* .
Fold mirrors * -if you select On , the exterior rear­
view mirrors fold in automatica lly when you press
the~ button on the remote control key or touch
the sensor* in the hand le .
Tone when locking1> -if you select On , a tone
will sound when you lock the vehicle.
Emergency locking /unlocking the doors
F ig. 30 Drive r's door : door lock cylinder
l) This function is not availab le in all countries.
42
Fig. 31 Door: emergency locking
If the central locking system malfunctions, you
mus t un loc k/lock the doo rs separately using the
mechanical key.
Unlocking/locking the driver's door with the
mechanical key
.,. Remove the mechanical key¢ page 39.
.,. To unlock the driver's door, turn the key to the
open position @¢
fig. 30.
.,. To lock the driver's door, se lect the P position
(automatic transmission) and t urn the key
once
to the closing position @¢&, .
Locking the front passenger's door/rear
doors with the mechanical key
The emergency lock is located on the rear side of
the front passenger's door and the rear doors. It
is only visible when the door is open .
.,. Remove the mechanical key ¢ page 39 .
.,. Remove the cap from the opening ¢ fig. 31 .
.,. Insert the key in the inside slot and turn it all
the way to the right {right door) or left (left
door).
A WARNING
Read and following all WARNINGS c:) A in De­
scription on page 3
7.
Anti-theft alarm sy stem
Applies to: vehicles wit h anti -theft ala rm system
If the anti-theft alarm system detects a vehicle
break-in, audio and visual warning signals a re
..,.

triggered. The anti-theft alarm system is activat­
ed when the vehicle is locked as usua l.
It
switches off when the vehicle is unlocked.
If the a larm is trigge red, it w ill shu t off automat­
ically a fter a ce rtain amount of time . Switch the
ignition on or press
the m button on the remote
control key to turn
off the alarm.
Luggage compartment
Lid
Opening /closing the luggage compartment
lid
Fig . 32 Driver 's door: opening the luggage compartment
lid
Applies to: vehicles with automatic transmission:
The luggage compartment lid can only open
when the selector lever is in P.
Applies to: vehicles with manual transmission:
The luggage compartment lid can only open
when the parking brake is set. Pull the
«el) sw itch
~ page 88 to set the parking brake.
Opening th e luggage compartment lid
.,. Press and hold the c:;; button on the remote
contro l key for at least one second . The luggage
compartment lid unlocks and opens slightly . Or
.,. Press the handle in the luggage compartment
l id. Or
.,. Pull the c:>* switch in the dr iver's door.
Cl osing the luggage compartment lid
.,. Use the inside gr ip to pull the luggage com­
partment lid down and allow it to close using a
gentle p ush
~ ,&. .
Op enin g an d clos ing
A WARNING
--After closing the luggage compartment lid,
make sure that it is latched . Otherw ise the
luggage compartment lid could open sud­
denly when dr iving, which increases the r isk
of an a cc ident.
- Never drive with the luggage compartment
lid ajar or open, because poisono us gases
can enter the vehicle interior and create the
risk of asphyx iat ion.
- Never leave your veh icle unattended when
the luggage compartment lid is open. A
child cou ld climb into the veh icle through
the luggage compartment. If the luggage compartment lid was then closed, the child
would be trapped in the vehicle and unable
to escape. To reduce the risk of injury, do
not allow children to play in or around the
veh icle . Always keep the luggage compart­
ment lid and the doors closed when the ve­ h icle is not in use.
-Always make sure no one is in the luggage
compartment lid's range of motion when it
is closing, especially near the hinges. Fin­
gers or hands could be pinched.
© Tips
- When the vehicle is locked, the luggage compartment lid can be unlocked separately
by pressing the
c:5 button on the remote
control key. The luggage compartment lid
locks automa tically when it is closed again.
- T he settings in the Infotainment system de­
termine if the luggage compartment lid can be opened using the
hand le~ page 41 .
- In case of an emergency or a fau lty handle,
t he luggage compartment lid can be opened
manually from t he
ins ide ~ page 46.
43

Opening and clo sin g
Automatic luggage compartment lid
Applies to: vehicles with automatic luggage compartment lid
The luggage compartment lid can be opened and
closed electrically.
F ig. 33 Driver's doo r: opening the luggage compartment
lid
Fig. 34 Luggage compartment lid: @clos ing button*, @
l ock button (vehicles with convenience key*)
Applies to: vehicles with automatic transmission:
The luggage compartment lid can only open
when the se lector lever is in
P .
Applies to: vehicles with manual transmission:
The luggage compartment lid can only ope n
when the parking brake is set. Pull
the© switch
¢ page 88 to set the parking brake .
Opening the luggage compartment lid
... Press and hold the ~ b utton on the remote
contro l key fo r at leas t one second . Or
... Pu ll the~ switch in the driver 's door briefly
¢ fig. 33 . Or
... Press the handle in the luggage compartment
lid.
Cl osing th e luggage compartment lid
... When the ignition is sw itched on, pull the~
switch in the driver's door until the luggage
compartment lid is closed
¢ ,& . Or
44
... Press the~ button in the luggage compart ­
ment lid
¢ fig. 34. The luggage compartment
lid wi ll automat ica lly lower and
close ¢,& . Or
... Applies to: vehicles with convenience key: Press
the~ button on the remote control key until
the luggage compartment l id
closes ¢.&, .
Make sure there is enough distance between
you and the luggage compartment lid . The re
should be a maxim um 9 feet (3 m) of distance.
Or
... Applies to: vehicles with convenience key: Press
the
tf) button in the luggage compartment lid
¢ fig. 34 . The remote control key m ust not be
more than approx imately
4 feet (1.5 m) away
from the luggage compartment and it must not
be inside the vehicle. The luggage compart­
ment lid will automatically lower and close. The
veh icle
locks ¢.&_ . Or
... Lightly p ull the luggage compartment lid at the
in ner gr ip. The luggage compartment lid wi ll
automatically lowe r and close
¢ .&_ . Or
... Press the hand le in the luggage compartment
lid. The luggage compartment lid will automat­
ically lower and close
¢ .&, .
Storing the luggage compartment lid
opening position
... Bring the luggage compartment lid into the de­
sired open position. The position must be at a
certain height or higher to store .
... Press and hold the~ button for at least four
seconds to store the new open position . A visu­
al and audio s ignal will follow .
... To set a higher open pos it ion, wa it at least five
seconds and then carefully p ress the luggage
compa rtment lid upward .
... Press and hold the~ butto n aga in fo r at leas t
four seconds to store the desired opening posi­
tion.
The opening/clos ing process will stop immedi ­
ate ly if:
- You pu ll/re lease
the~ sw itch in the drive r's
door, or
- Applies to: vehicles with convenience key:
Press/re lease
the~ b utton o n the remote
con trol key, o r

-Applies to: vehicles with convenience key: Press
the~ button or the lr! button in the luggage
compartment lid, or
- You push the handle in the luggage compart­
ment lid, or
- When something blocks the luggage compa rt­
ment lid or makes it difficu lt for the lid to
move.
I f you press the handle or one of
the~ or lr! but ­
tons (vehicles w ith convenience key*) now, the
luggage compartment lid will either open or
close, depending on its angle .
_&. WARNING
-After closing the luggage compartment lid,
make sure that it is latched. Otherwise the
luggage compartment lid could open sud­
denly when driving, which increases the risk
of an accident.
- Pay careful attent ion when closing the lug­
gage compartment lid . Otherw ise, you could
cause serious inj ury to yourself or othe rs de­
spite the pinch protection .
- To reduce the risk of p inch ing injur ies, al­
ways make sure that no one is in the operat­
ing area of the luggage compartment lid; in­
cluding the hinge areas and the upper and
lower edge of the luggage compartment lid .
- Never dr ive with the luggage compartmen t
lid ajar or open, because poisonous gases
can enter the vehicle interior and create the
risk of asphyxiation.
- If there is a luggage rack (such as a bicycle
rack) on the luggage compartment lid, the
luggage compartment lid may not open
completely under certain circumstances or it
could close by itself if open due to the extra
weight. To reduce the r isk of injury, the
open luggage compartment l id must there­
fore have add itiona l support or the cargo
must first be removed from the rack.
(D Tips
- The settings in the Infota inment system de­
termine if the luggage compartme nt lid ca n
be opened us ing the
handle <=> page 41.
Openin g an d clos ing
-There are audio signa ls when closing the
luggage compartment lid with the remote
control key (vehicles with convenience key*)
or with
the~ button in the dr iver's door.
- When the vehicle is locked, the luggage
compartment lid can be unlocked separately
by pressing
the~ button on the remote
control key. The luggage compartment lid
locks automatically when it is closed again.
- Applies to: vehicles with convenience key:
The luggage compartment lid can be closed
w ith the convenience from a distance up to
approximately 9 ft (3 m).
- The luggage compartment lid can be oper­
ated manually if the vehicle battery is low.
It is necessary to use more force when doing
this. Move the lid s low ly to reduce the
amount of fo rce needed.
- When the t railer socket is being used (for
example, for a bicycle rack), the luggage
compar tment lid can be opened a nd closed
using the handle or the foot mot ion activa­
tion (vehicles w ith convenience key*) .
- In case of an emergency o r a fau lty handle,
the luggage compartment lid can be opened
manually from the
insider=> page 46.
Opening /closing the luggage compartment
lid with foot motion activation (kicking
movement )
Applies to: vehicles with convenience key and sensor-control­
led luggage compartment lid
Fig . 35 Rear of the veh icle: foot movement
Applies to: sedan
You can open the luggage compartment lid with
foot motion activation.
.,.
45

Opening and clo sin g
Applies to: all road
You can open and close the luggage compart­
ment lid with foot motion activation .
Requirements: you must be carrying your vehicle
key with you. You must be standing at the center
behind the luggage compartment lid. You shou ld
be approximately 8 in (20 cm) from the rea r of
the vehicle . The ign ition must be switched off.
Make sure you have firm footing.
- Move your foot back and forth be low the bump­
er ~ fig. 35 . Do not touch the bumper. The lug­
gage compartment lid will open/close once the
system detects the movement.
The luggage compartment lid will only open/ close if you perfo rm the movement as described.
This prevents the luggage compartment lid from
ope ning o r closing due to simi lar movements,
such as when you walk between the rear of the
vehicle and your garage door.
The closing of the luggage compartment lid is in­
d icated by a warning signal and can be cance led
by making the described movement again.
The foot movement does not loc k the vehicle.
General inform ation
In some situations, the function may be limited
or temporar ily unava ilable . This may happen if:
- the luggage compartment lid was closed imme­
diately before
- you park close to a hedge and the branches
move back and forth under the vehicle for a
long period of time
-you clean your vehicle, for example with a pres­ sure washer or in a car wash
- there is heavy rain
-the bumper is very dirty, for example after driv-
ing on salt-covered roads
-there is interfe rence to the radio signa l from
the vehicle key, such as from cell phones or re­
mote controls
A WARNING
-Pay careful attention when closing the lug­
gage compartment lid. Otherw ise, you could
46
cause serious injury to yourse lf or others de­
spite the pinch protection.
- To reduce the risk of pinching injuries, a l­
ways make sure that no one is in the operat­
ing area of the luggage compartment lid; in­
cluding the hinge areas and the upper and
lower edge of the luggage compartment lid .
- Never drive with the luggage compartment
lid ajar or open, because poisono us gases
can enter the vehicle interior and create the
risk of asphyx iat ion.
- Ap plies to: allroa d: If there is a luggage rack
(such as a bicycle rack) on the luggage com­
partment lid, the luggage compar tment lid
may not open completely under certain cir­
cumstances, o r it co uld close by itself if
open due to the extra weight. To reduce t he
risk of injury, the open luggage compart­
ment lid must therefore have additional
support or the cargo must f irst be removed
from the rack.
Trunk escape latch
Appl ies to : vehicles with trunk escape latc h
In case of on emergency, the rear lid con be
opened from the inside using the trunk escape
latch.
Fig. 36 Luggage compartment: Trunk escape latc h
11> Push the latch in the di rect ion of the arrow un­
til the lock re leases.
The trunk escape latch inside the rear lid is made
of fluorescent material to glow in the dark.
A WARNING
The t runk escape latch is to be used only in an
emergency.

@ Tips
The emergency release lever should never be
used as a handle for closing the luggage com­
pa rtment lid.
Luggage compartment lid emergency
release
App lies to: sedan
F ig . 3 7 In ner lu ggage co mpartmen t lid: access to t he
e m erge ncy re lea se
F ig. 38 Rea r be nch s eat: e merge ncy re lease cab le
The rear lid ca n be o pene d from t he lugg age
compa rtme nt or from the rea r bench se at using
the emerge ncy re lease .
Folding rear seat backrest
.,. Remove the mecha nica l key ¢ page 39 .
.,. Usi ng the emerge ncy key, pry off the cover in
t h e luggage compartmen t lid trim p anel
¢fig. 3 7 .
.,. Press t he lever in the di rect io n of the arrow to
release the luggage compartment lid .
Fixed rear seat backrest
.,. Caref ully pull the left s ide of the rea r bench
seat ou t of i ts mo unt un til you can re ach the re ­
l ease cab le
o:> fig . 38 .
.,. Remove the Ve lcro ® tape @.
Open ing and closing
.,. Pull on the loop @ unt il the rear lid re leases .
.,. Tape the release cab le back in place and press
the bench seat bac k into its retainer.
_& WARNING
-
Afte r opening the luggage compartment lid
using the emergency release in vehicles w ith a
f ixed rear sea t backrest, ma ke sure the brack­
et under the rear bench seat locks securely in­
to the mou nti ng eyelet aga in.
Luggage compartment lid emergency
release
Applies to: allroad
Fig. 39 In ner l uggage compa rt m ent l id: access to the
emergency rel ease
.,. Remove the mec hanical key i::> page 39 .
.,. Pry out the cover using the mechan ica l key
¢fig. 39 .
.,. Press the lever in the direction of the arrow to
release the luggage compartme nt lid .
47

Opening and closing
Child safety lock
The child safety lock prevents the rear doors
from being opened from the inside and the rear
power windows from be operated .
Fig. 40 Section of driver's door: co ntrols
Fig. 41 Rear door: chil d safety lock
0 N M 9 ::J co (D
• T o deactivate/activate the power window
switch in the rear doors, press the@ button in
the driver 's
door ¢ fig. 40. The indicator light in
the button turns on/blinks.
• To also deactivate/activate the inner door han­
dle, open the respective rear door and turn the
key switch with the mechan ical key in the direc­
tion of the arrow or opposite the direct ion of
the arrow
<=> fig. 41 .
Message in the instrument cluster display
faj Childproof catch: malfunction! Please con­
tact Service
There is a malfunction in the child safety lock.
Press the@ button again.
If the message stays on, drive immediately to an
authori zed Audi dealer or authorized Audi Service
Facility to have the malfunction repaired.
48
A WARNING
-Always take the vehicle key with you when
leav ing the vehicle, even for a short period
of time . This applies part icularly when chil­
dren remain in the vehicle . Otherwise chil­
dren could start the engine or ope rate elec­
trical equipment (such as power windows),
which increases the risk of an acc ident.
- A malfunction in the child safety lock could
allow the rear doors to be opened from the
inside, which increases the risk of an acci­
dent .
Power windows
Controls '
The driver con control all power windows .
Fig. 42 Driver"s door: power w indow controls
All powe r window switches are equipped with a
two-stage function :
Opening and closing the windows
a, .... M 0 ::, (X) (D
• To open or close the window completely, press
the switch down or pull the switch up briefly to
the second level. The operat ion will stop if the
sw itch is p ressed/pulled again.
• To select a position in between opened and
closed, p ress/pu ll the switch to the first level
until the desired window position is reached.
Power window switches
CD Left front door
@ Right front door
® Left rear door
© Right rear door