2018 AUDI A4 ECU

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(D Note
Driving with an insufficient oil level is likely to
cause severe damage to the engine.
@ Tips
-The oil pressure warning display. is not
an indicator of the oil level. Do not rely on
it. Instead, check the oil level in your en­
gine at regular intervals, preferably each
time you refuel, and always before going
on a long trip.
-If you have the impression your engine con­
sumes excessive amounts of oil, we recom­
mend that you consult an authorized Audi
dealer to have the cause of your concern
properly diagnosed. Keep in mind that the
accurate measurement of oil consumption
requires great care and may take some
time. An authorized Audi dealer has instruc­
tions about how to measure oil consump­
tion accurately.
Checking the engine oil level and adding
engine oil
The engine oil level can be checked in the Info ­
tainment system
Fig. 269 Engine compa rtment: eng ine oil filler opening
cove r
Checking the engine oil level
- Park the vehicle on a level surface.
- Shut the engine off when it is warm.
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-N
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-Switch only the ignition back on. Wait approxi-
mately two minutes so that the engine oil can
flow back into the oil pan .
Checking and Filling
- Select in the Infotainment system: the !MENUI
button > Vehicle > left control button > Service
& checks > Oil level.
-Check the oil level in the Infotainment system
display. Add engine oil if the bar in the oil level
indicator is just before "min".
Adding engine oil Follow the safety precautions
~&. in Working in
the engine compartment on page 323.
- Stop the engine and open the hood
~page 324 .
-Unscrew the cap~ on the engine oil filling
opening
~ fig. 269, Qpage 325.
- Carefully add O .S quart (O .S liter) of the correct
oil
~ page 325.
- Close the engine oil filler opening cap.
- Close the hood, restart the ignition after two
minutes and read the current oil level in the In ­
fotainment system.
A WARNING ...__ --When adding oil, do not let oil drip onto hot
engine components. This increases the risk
of afire.
-You must secure the cap on the oil filler
opening correctly so that oil does not leak
out onto the hot engine and exhaust system
when the engine is running, because this is
a fire hazard.
-Always clean skin thoroughly if it comes into
contact with engine oil.
0 Note
- The engine oil level must not be under the
"min" marking, because this increases the
risk of engine damage.
- If the message II Please reduce oil level
appears, there is too much oil in the engine
and there is a risk of damaging the catalytic
converter and engine. Do not start the en­
gine. Contact an authorized Audi dealer or
authorized Audi Service Facility to have ex­
cess engine oil extracted if necessary.
- Do not mix any additional lubricants into
the engine oil. Damage caused by such addi-
tives is not covered by the warranty.
IJJ>
327

Checking and Filling
.,. Push the release button again and remove the
cap comp lete ly .
.,. Make sure that the fluid level rema ins stable.
Add more coolant if necessary .
.,. Turn the cap to the right to secure it until you
feel resistance a second t ime.
Coolant loss usually indicates there is a leak . Im ­
mediately drive your vehicle to an authorized
Audi dealer or authorized Audi Serv ice Facility
and have the cooling system inspected . If the
coo ling system is not leaking, a loss can come
from the coolant boiling through overheating
and being pushed out of the cool ing system.
_& WARNING
- T he coo ling system is under pressure. Do
not open the coolant expansion tank cap
when the engine is hot. This increases the
risk of burns.
- The coo lant add itive and the coolant can be
dangerous to your healt h. For this reason,
keep the coolant in the origina l container
and away from children. There is a risk of poison ing.
- When working in the engine compartment, remember that the radiator fan can switch
on even if the ign ition is switc hed off, which
increases the risk of in jury.
(D Note
Do not add coolant if the expansion tank is
empty. There may be air in the cooling sys­
tem, wh ic h increases the risk of engine dam­
age.
If th is is the case, do not continue dr iv­
ing . See an a uthorized Aud i dea le r or author­
ized Aud i Service Fa cil ity fo r assistance.
330
Brake fluid
Fig. 271 En gine compa rtment: cap o n brake fluid reservo ir
Observe the safety precautions¢.&, in Working
in the engine compartment on page 32 3 .
Check ing the brake fluid level
.,. Read the brake fluid level on the brake fluid
reservoir ¢ page 325, fig . 268 . The brake flu id
level must be between the MI N and MAX ma rk­
ings ¢.&, .
The brake f lu id level is monito red automatically.
Changing the brake fluid
Have the brake fluid changed regularly by an au­
thorized Audi dea ler or authorized Audi Service
Facility.
_& WARNING -
- If the brake flu id leve l is below the MIN
marking, it ca n impair the brak ing effect
and driving safety, wh ich increase the r isk of
an accident. Do not continue dr iv ing . See an
author ized Audi dealer or au thori zed Audi
Serv ice Facility fo r ass ist ance.
- I f the brake fl uid is old, b ubbles may form
in the bra ke system dur ing heavy bra king.
This wo uld im pair b raking per formance and
driving safety, which increases the risk of an
accident.
- To ensure the brake system functions cor­
rectly, only use bra ke fluids tha t comp ly
wit h VW standard 50 1 14 or
FMVSS- 116 DOT 4 .
(D Note
-If the bra ke f lu id leve l is ab ove the MAX
marking, bra ke fluid may le ak o ut over the

Emergency assistance
Emergency assistance
General information
... Park the vehicle as far as possible from moving
traffic in the event of a breakdown. In the event
of a flat tir e, park the vehicle on a level surface .
It you are on a steep hill, be especially careful.
.,. Set the parking brake .
.,. Switch the emergency flashers on .
... Have the passengers exit the vehicle . They
should move to a safe place, for example be­
hind a guard rail.
_& WARNING
Follow the steps given above . This is for your
protection and the for the safety of other driv ­
ers.
Equipment
Vehicle tool kit/tire mobility kit/vehicle
jack
Applies to: vehicles with the vehicle tool kit, tire mobility kit
and veh icle jack
Applies to: sedan
Fig. 278 L uggage compartmen t: vehicle too l kit , ve hicle
j ack, tire mob ility kit an d comp resso r
Applies to: allroad
Fig. 279 Lug gage compa rtmen t: ve hicl e tool kit, v ehicle
j ack, tir e mobil ity k it and comp resso r
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The vehicle tool kit, vehicle jack, tire mobility kit
and compressor are stored in the luggage com­
partment under the cargo floor cover.
Applies to: sedan
.,. Lift the cargo floor using the plastic handle and
hook the hand le onto the luggage compart­
ment
seal ~ fig. 2 78.
Applies to: allroad
... Remove the cargo floor cover ~ fig. 279 .
Applies to : vehicles with spare tire
... Remove the handle by turning it counter-clock ­
wise and remove the spare tire.
Appl ies to: sedan
.,. Unhook the cargo floor before closing the lug-
gage compartment lid .
Depend ing on vehicle equipment, the vehicle tool
kit, tire mobility kit and compressor may be lo­
cated under another cover that is secured w ith a
handwheel.
Applies to : allroad
On some vehicles, the vehicle tool kit is located
directly under the cargo floor
cover@~ fig. 2 79
behind the rear bench seat.
_& WARNING
Impr oper use of the vehicle jack can cause se­
rious personal injur ies.
- Never use the screw driver hex head to
tighten wheel bolts, since the bolts cannot
attain the necessary tightening torque if you
use the hex head, potentially causing an ac­
cident.
- The factory-supp lied jack is intended only
for your vehicle mode l. Under no circum­
stances should it be used to lift heavy
veh icles or other loads; you risk injuring
yourself.
- Never start the engine when the vehicle is
raised, which cou ld cause an accident.
- Support the vehicle securely with appropri­
ate stands if work is to be performed under­
neath the vehicle; otherwise, there is a po­
tential risk for injury.

Emergency assistance
Loosening the wheel bolts
Fig. 284 Wheel: loosening the wheel bolt
• Slide the wheel wrench (from the vehicle tool
kit) all the way onto the wheel bolt.
• Turn the wheel bolt approximately one turn to
the left -arrow-. To reach the required torque,
hold the end of the wheel wrench. If the wheel
bolt will not loosen, press carefully on the
whee l wrench with your foot. Hold onto the ve­
hicle securely while during this and make sure
your stance is stable .
A WARNING
To reduce the risk of an accident, only loosen
the wheel bolts gently (one turn) before rais­
ing the vehicle with the veh icle jack*.
Raising the vehicle
Fig . 28S Sill panels: markings
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Fig. 286 Sill: positio ning the vehicle jack
• Place the veh icle jack* (vehicle tool kit) on a
firm s urface. Use a flat, stable support if neces­
sary. On a slippery surface such as tile, you
should use a non-slip pad (such as a rubber
mat)¢ &.
• Find the marking on the sill that is closest to
the tire that will be
changed¢ fig. 2 85 . Behind
the marking, there is a lifting point on the side
sill for the vehicle jack*.
• Turn the handwheel to raise the vehicle jack*
under the lifting point on the side sill until the
bracket on the jack @ completely covers the
notch on your vehicle.
• Align the vehicle jack* so the bracket @covers
the notch and the base ® is flat on the ground.
The base ® must be directly under the lifting
point @.
• Mount the crank on the vehicle jac k*: insert the
crank into the opening on the handwheel. Turn
the crank to the left or right to secure it.
• Continue ra is in g the veh icle jack* with the
crank until the wheel lifts off the ground slight­
ly.
A WARNING
- Ma ke sure the vehicle jack* is stable. Th ere
is a risk of injury when the ground is slick or
soft, because the vehicle jack* could slide or
sink.
- Only raise your vehicle with the vehicle jack*
provided by the factory . If you use a vehicle
jack designed for another vehicle, your vehi­
cle can slide and cause injury.
- Position the vehicle jack* only at the desig­
nated mounting points on the side sill and
align the jack. Otherwise, the vehicle jack*

could slip and cause an injury if it does not
have sufficient hold on the vehicle.
- To reduce the risk of an accident, never start
the engine when the vehicle is raised.
- To reduce the risk of injury, support the ve­
hicle securely with suitable stands if work is
to be performed underneath the vehicle.
- To help prevent injury to yourself and your
passengers:
- Do not raise the vehicle until you are sure the jack* is securely engaged.
- Passengers must not remain in the vehicle when it is jacked up.
- Make sure that passengers wait in a safe
place away from the vehicle and well away
from the road and traffic.
- Make sure jack position is correct, adjust as necessary and then continue to raise
the jack*.
- If work has to be done under the vehicle, ensure that it is safely supported on suita­
ble stands
-risk of injury!
- Never start the engine when the vehicle is on the jack*
-risk of accident!
(D Note
Do not lift the vehicle by the sill. Position the
vehicle jack* only at the designated mounting points on the side sill. Otherwise, your vehicle
will be damaged.
Removing and installing a wheel
Fig. 287 Wheel: inte rnal hex socket to turn the whee l
bolts
Emergency assistance
Fig. 288 Whee l: alignment pin in the top ho le
Removing a wheel
.,. Remove the top wheel bolt completely using
the hex socket in the screwdriver handle (in the
vehicle tool kit)
~fig. 287 and place it on a
clean surface.
.,. Install the alignment pin (from the vehicle tool
kit) by hand into the empty
hole ~ fig. 288.
.,. Remove the rest of the wheel bolts.
.,. Remove the wheel. The alignment p in remains
in the hole while doing this.
Install a wheel
Read the directions on~ page 366 when instal­
ling unidirectional tires.
.,. Slide the wheel on over the alignment pin .
.,. Install the wheel bolts and tighten gently using
th e hex socket.
.,. Remove the alignment pin and also tighten the
remai ning wheel bolt.
.,. Carefully lower the vehicle using the vehicle
jack*.
.,. Tighten the wheel bolts in a diagonal pattern
using the wheel wrench .
The wheel bolts must be clean and loosen/tight­
en easily. Check the contact surfaces for the
wheel and hub . Contaminants on these surfaces
must be removed before installing the wheel.
A WARNING
Never use the hex socket in the screwdriver
handle or the hex socket wrench with the
ratchet to loosen or tighten the wheel bolts.
This increases the risk of an accident, because
you will not reach the tightening specification
required .
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-Always store damaged wheel, jack* and
tools securely in the luggage compartment.
Otherwise, in an accident or sudden maneu­
ver they could fly forward, causing injury to
passengers in the vehicle.
Space-saving spare tire
App lies to: ve hicles with space-saving spare t ire (co mpact
spare tire)
The spare tire is intended for short -term use on ­
ly. Have the damaged tire checked and replaced,
if necessary, by an authorized Audi dealer or au­
thorized Audi Service Facility as soon as possible.
There are some restrictions on the use of the
compact spare tire . The compact spare tire has
been designed specifically for your type of vehi­
cle. Do not replace it with the spare tire from an­
other type of vehicle.
The compact spare tire is located in the luggage
compartment under the cargo f loor cover
c::>page360.
The tire pressure must be 61 PSI (420 kPA).
Snow chains
For technical reasons, the use of snow chains on
the compact spare tire is not permitted.
If you have to drive with snow chains and a front
tire fails, mount the spare t ire in place of a rear
tire. Install the snow chains on the rear tire that
you removed, and insta ll that in place of the
front tire that failed.
A WARNING
-After installing a spare tire, the tire pres­
sure must be checked as soon as possible.
-Do not drive faster than 50 mph (80 km/h)
with a compact spare tire. Driving faster
than that increases the risk of an accident.
-T o reduce the risk of an accident, avoid full­
thrott le acceleration, heavy braking, and
fast cornering with the compact spare tire.
-To reduce the risk of an accident, never drive
with more than one compact spare tire.
-Normal summer or winte r tires must not be
mounted on the compact spare wheel rim.
Emergency assistance
Collapsible spare tire
Applies to: vehicles with collapsible spare tire
The collapsible spare tire is intended for short­
term use only . Have the damaged tire checked
and rep laced, if necessary, by an authorized A udi
dealer or authorized Audi Service Facility as soon
as possible.
There are some restrictions on the use of the co l­
l apsible spare tire. The collapsible spare tire has
been designed spec ifically for your type of vehi­
cle. Do not replace it with the collaps ible spare
t ir e from another type of vehicle .
The co llapsible spare tire is located in the lug­
gage compartment under the cargo floor cover.
Requirement: the vehicle too l kit
c::> page 360 and
the compressor must be laid out .
Removing
"' Remove the cargo floo r cover c::> page 360,
fig. 279.
"' Turn the handwheel counter-clockwise and re-
move it.
"' Remove the co llapsible spare tire.
You must inflate the collapsible spare tire be­
fo rehand in order to use it.
Inflating
"' Remove the valve cap from the collapsible
spare tire.
"'Tighten the comp ressor hose on the collapsible
spare tire valve.
"'Connect the comp ressor hose to a vehicle soc k­
et and switch it on .
"'Let the compressor run until the specified value
on the tire pressure sticker is reached
c::> page 344, fig. 277 c::>(D.
"'Screw the valve cap back onto the valve.
Returning to storage
"'R emove the valve cap to drain the air .
"'Wait severa l hours before placing the collapsi­
ble spare tire in the spare wheel well. Only then
w ill it fold down comp letely so that you can
store it securely .
"' Then screw the valve cap back onto the valve . ..,_
367

Emergency assistance
"'Secure the collapsible spare tire with the hand -
whee l.
"'Fo ld the cargo floor cover back into p lace.
Snow chains
Using snow chains on the collapsible spare tire is
not permitted for technical reasons.
If you have to drive with snow chains and a front
tire fa ils, mount the collapsible spare tire in
p la ce of a rear tire. Insta ll the snow cha ins on the
rear tire that you removed, and install that in
p lace of the front tire that failed.
A WARNING
-
- Only use the collapsible spare tire in emer ­
gencies and drive very carefully, especially if
it is more than six years old .
- The compressor and the hose can become
very hot during operation which increases
the risk of burn injuries.
- After installing a collapsible spare tire, the
t ir e pressure must be checked as quickly as
poss ible to reduce the risk of an acc ident.
- Do not drive faster than 50 mph (80 km/h)
with a collapsible spare tire. Driving faster
than that increases the risk of an accident .
- Avoid full-throttle acceleration, heavy brak­
ing, and fast cornering with the collapsible
spare tire, because this increases the risk of
an accident .
- Never drive using more than one collapsible
spare tire, because this increases the risk of
an accident.
- Normal tires or winter tires must not be
mounted on the collaps ible spare tire rim.
«J:) Note
The compressor must be switched off after 12
minutes at the most to reduce the risk of
overheating . Let the compressor cool down
for several minutes before using it again.
368

@ Tips
The discharged battery must be properly con­
nected to the vehicle's electrical system .
When jump starting or charg ing the battery,
never connect the negative ground cable to
the battery negative post because the battery
manager system must be able to detect the
battery's state of charge. Always connect the
negative ground cable to the negative ground
post of the battery manager control unit.
Using the jump start
cable
Both jump start cables must be connected in the
correct order!
Fig. 295 Engine compartment: connec tors for jump start
cables and a charger
Fig. 296 Ju mp starting us ing a battery in another vehicle:
@ -providing current, @-drained
The procedure described below for connecting
jumper cables is intended to prov ide a jump start
for your vehicle .
Vehicle with discharged battery
•Turnoff lights and accessories, move the auto­
matic transmission* selecto r lever to N (Neu­
tral) or P (Par k), and set the park ing brake.
Emergency situations
Connecting the positive cable (red) to the
positive terminal
• Open the red cover on the positive terminal
c:>fig. 295 .
1. Secure one end of the positive cable (red) to
the jump start pin
c:> fig. 296 (D (pin under
the red cover = "posit ive") on the vehicle that
needs to be started @.
2. Secure the other end of the positive cable
(red) to the positive termina l@ on the
bat­
tery provid ing the current @.
Connecting the negative cable (black) to the
negative terminal
3. Secure one end of the negative cable (black)
to the nega tive term inal @ on the battery
that is providing the current @.
4. Secure the other end of the negative cable
(black) to the jump start
pin @ (hex head pin
= "negative") on the vehicle that needs to be
started @.
Starting the engine
• Start the engine on the vehicle providing the
jump start @and let it run at idle.
• Now start the engine on the vehicle with the
drained battery @.
• If the engine does not start, stop the starting
procedure after 10 seconds and then repeat it
after approx imately 30 seconds.
• Remove the cables when the engines are run­
ning. Remove them in reverse order from the
way they were installed.
• Close the red cover on the positive terminal.
T he battery is vented to the outside to prevent
gases from enter ing the vehicle interior . Make
sure that the jumper clamps are well connected
with their
metal parts in full contact with the
battery terminals.
_& WARNING
-To avoid serious personal injury and damage to the vehicle, heed all warnings and instruc ­
tions of the jumper cable manufacturer. If in
doubt, call for road service.
-Jumper cables must be long enough so that
the vehicles do not touch .
..,_
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