2017 AUDI S4 ECU

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& WARNING
Charging a battery can be dangerous.
- Always follow the operat ing instruct ions
provided by the battery charger manufactur­
er when charging your battery .
- Never charge a frozen ba ttery . It may ex­
plode because of gas trapped in the ice. A l­
low a frozen battery to thaw out first .
- Do not reuse batteries wh ich were frozen.
The battery housing may have cracked and
weakened when the battery froze .
- Charge the battery in a we ll ventilated area.
Keep away from open flame or electrical
spark. Do not smoke . Hydrogen gas generat­
ed by the battery is exp losive.
- To reduce the danger of explosion, never
connect or disconnect charger cables whi le
the charger is operat ing.
- Fast charging a battery is dangerous and
should only be attempted by a competent
technician with the proper equipment.
- Battery acid that may spill during charging
should be washed off with a solution of
warm water and baking soda to neutralize
the acid .
(D Note
Never use a fast charger as a booster to start
the engine. This will serious ly damage sensi­
tive electronic components, such as control
units, relays, radio, etc ., as well as the battery
charger .
Replacing the battery
Your veh icle is equipped with an inte llige nt ene r­
gy management system for d istr ibut ing elect rici ­
ty ¢
page 138. The battery cha rges better in
vehicles with the en ergy management system
than in vehicles without the system. To ensure
that th e additional pow er is availabl e after re ­
p lac ing the battery, rep lacing w ith the same type
of b attery from the s ame manufac turer ( like the
battery that was delivered with the veh icle) is
recommended . Yo ur authorized deale r must code
the battery in the energy management system to
Ch eck ing and Filling
enable you to use the energy management func­
tions corr ectly aft er replacing the batt ery .
If it is no t possib le to use a battery of this type,
the new battery mus t have the same capacity,
vo ltage ( 12-volts), amperage, construction and
plug sealing.
When install ing the battery, make sure the ig ni­
t ion and all electr ica l cons umers are tu rned off.
Q) Note
- Vehicles, fo r example with a Start-Stop sys­
t em*, a re equipped with a specia l cycle­
proof bat tery (such as an AGM battery). In­
sta lling a different type of battery can cause
prob lems in the veh icle elect rical system .
When replacing the vehicle battery, always
install one w ith the same specifications as
the origina l battery.
- Make sure that the gas venting hose is al­
ways connected to the original opening on the battery s ide . Otherw ise gasses or bat­
tery acid could leak out .
- Battery mounts and clamps must always be
secured correct ly .
- Read and follow the warn ings under
¢
page 313, Working on the battery before
performing any work on the battery.
® For the sake of the environment
Because of the problem of proper d isposa l of
a battery, we recommend your authori zed
Audi dealer change the battery for you. Bat ­
teries contain sulfur ic acid and lead and must
always be disposed of properly in compliance
wi th a ll envi ronmenta l reg ulat ions. Dispos ing
of veh icle bat teries improperly is very da nger­
ous to the environment.
315

Emergency assistance
Trunk escape latch
In case of an emergency, the rear lid can be
opened from the inside using the trunk escape
latch.
Fig. 257 Luggage compartment: Trunk escape latc h
• Push the latch in the direction of the arrow un­
t il the lock releases.
The trunk escape latch ins ide the rear lid is made
of fluorescent material to glow in the dark.
_& WARNING
The trunk escape latch is to be used only in an
emergency .
@ Tips
The emergency release lever should never be
used as a handle fo r closing the luggage com­
par tment l id.
General information
• Park the vehicle as far as poss ible from moving
t raff ic in the event of a breakdown . In the event
of a flat tire , park the vehicle on a leve l 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.
Emergen cy a ssis tanc e
_& WARNING
-Follow the steps given above. Th is is for your
protection and the for the safety of other driv ­
ers .
Equipment
Vehicle tool kit/vehicle jack
Applies to: vehicles wit h the vehicle tool kit and vehicle jack
Fig. 258 Lu ggage compa rt ment: vehicle tool kit, vehicle
jack*, tir e m ob ility kit and compressor
The vehicle tool kit, vehicle jack, tire mobility k it
and compressor are stored in the luggage com­
partment under the cargo floor cover.
• Lift the cargo floor using the p lastic handle and
hook the handle onto the luggage compart­
ment seal
c:> fig . 258.
• Vehicles with spare tire: turn the handle coun­
ter -clockwise and remove the spare tire .
"' Unhook the cargo floor before closing the rear
lid .
Depending on vehicle equipment, the vehicle tool
k it, tire mobility kit and compressor may be lo­
cated under another cover that is secured w ith a
handwheel.
(D Tips
The vehicle jack in your vehicle is mainte­
nance-free.
Tire mobility kit
Preparation
"' Read and follow the important safety precau­
tions
c:> page 343.
• Set the parking brake. ll>-
34 3

Emerg ency assis ta nce
The vehicle jack mode* switches off automatical­
ly at speeds above 6 mph (10 km/h).
A WARNING
If you are changing a tire on a steep hill, use a
block or similar object to block the opposite
wheel to prevent the vehicle from moving.
A WARNING
You or your passengers could be injured wh ile
chang ing a wheel if you do not follow these
safety precautions :
- If you have a flat t i re, move a safe d ista nee
off the road . Turn off the engine, turn the
emergency flashers on and use other warn­
ing devices to alert other motorists.
- Make s ure that passengers wa it in a safe
place away from the vehicle and well away
from the road and traffic.
- To help prevent the vehicle from moving
suddenly and possibly slipp ing off the jack,
always fully set the parking brake and block
the wheel diagona lly oppos ite the wheel be­
ing changed with the folding chocks or oth ­
er objects . When one front wheel is lifted
off the ground, placing the Automatic
Transmission in "P" (Park) will
not prevent
the vehicle from moving.
- Before you change a wheel, be sure the
ground is level and firm. If necessary, use a
sturdy board under the jack.
- Always store the veh icle tool k it, the jack
and the replaced tire in the luggage com­
partment
c::> page 242.
@ Tips
Obey all laws.
346
Removing the cap
Fig. 262 Whee l: wheel bolts with c aps
Whee l bolts with cap s
.. Slide the p lastic clip (from the vehicle tool k it)
onto the cap until it engages
c::> fig . 262.
.,. Remove the cap with the plastic clip.
Loosening the wheel bolts
Fig . 263 Whee l: loosen ing t he whee l 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 ca refu lly on the
wheel wrench with your foo t. H old onto the ve­
hicle securely whi le dur ing th is and make sure
your stance is stable.
A WARNING
To reduce the risk of an accident, only loosen
the wheel bolts gent ly (one turn) before rais­
i ng the veh icle with the vehicle jack*.

lifting the vehicle
Fig. 264 Sill p anels : m arkin gs
Fig. 265 Sill: posit io nin g th e vehicle jack
.,. Place the vehicle jack* (vehicle tool kit) on a
firm surface . Use a flat , stable support if neces ­
sary . On a slippery surface such as tile, you
sho uld use a non-s lip pad (such as a rubber
mat)
¢ 8, .
.,. Find the mar king on the sill that is closest to
the tire that will be changed¢
fig. 264. Behind
the marking, there is a lift ing point on the side
sill for the v ehicle jack* .
.,. Turn the handwheel to raise the veh icle jack*
under the lifting point on the s ide s ill 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 gro und .
The base @ must be direct ly unde r the lifting
poin t@ .
.,. Mount the crank on the vehicle jack*: insert the
crank into the opening on the handwheel. Turn
the rod left or right to secu re it .
.,. Cont inue raising the vehicle jack* with the
crank until the wheel lifts off the ground slight­
ly .
Em ergen cy a ssis tanc e
A WARNING
--Make sure the vehicle jack* is stable. There
is a risk of inju ry when the ground is slick o r
soft, because the vehicle jack* could slide or
sink .
- Only raise your vehicle w ith the vehicle jack*
provided by the factory . If you use a vehicle
jack designed for anothe r vehicle, your veh i­
cle ca n slide and cause injury.
- Position the veh icle jack* only at the des ig­
nated lifting points on the side s ill and align
the j ack. Othe rw ise, the vehicle jack* could
slip and cau se an i njury if it does not have
sufficient hold on the vehicle.
- To reduce the r is k of an accident, neve r start
the engine when the vehicle is raised.
- To reduce the r isk of injury, support the ve­
h icle sec urely with s uitable stands if wor k is
to be performed underneath the vehicle .
- To help preven t injury to yourse lf 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 veh icle,
ensure that it is safely supported on suita­
ble stands -risk of i njury!
- Never start the eng ine when the vehicle is
o n the jack -risk of accident!
(D Note
Do not lift the ve hicle by the s ill. Pos ition the
vehicle jack* only at the designated lifting po ints on the side sill. Otherw ise, your veh icle
will be damaged .
347

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~ If the removed wheel does not fit in the spare
whee l we ll, store it securely in the luggage
compartment ¢
page 242.
~ Check the tire pressure on the installed whee l
as soon as possible.
~ On vehicles with a Tire Pressure Monitoring Sys ­
tem*, check the tire pressure and store it in the
Infotainment system
<::;> page 336 .
~ The wheel bolt tightening specification must be
90
ft lbs (120 Nm). Check it as soon as possible
with a torque wrench . Drive carefully until then.
~ Have the faulty wheel replaced as quickly as
possible.
(D Tips
- If you notice that the wheel bolts are cor­
roded and difficult to turn while changing a
tire, they should be replaced before you
check the tightening torque.
- Drive at reduced speed until you have the
tightening torques checked.
Notes on wheel changing
Please read the information ¢ page 324 if you
are go ing to use a replacement tire which is dif­
ferent from the tires on your vehicle.
After you change a tire:
- Check the tire pressure on the replacement
tire immediately after installation.
- Have the wheel bolt tightening torque
checked with a torque wrench as soon as pos­
sible by your authorized Audi dealer or quali­
fied workshop.
- With steel and alloy wheel rims, the wheel
bolts are correctly tightened at a torque of
90 ft lbs (120 Nm).
- If you notice that the wheel bolts are corroded
and difficult to turn while changing a tire,
they should be replaced before you check the
tightening torque.
- Replace the flat tire with a new one and have
it installed on your vehicle as soon as possi­
ble . Remount the wheel cover.
Until then, drive with extra care and at reduced
speeds .
Emergency assistance
A WARNING
- If you are going to equip your vehicle with
tires or rims which differ from those which
were factory installed, then be sure to read
the information
r::;> page 324.
-Always make sure the damaged wheel or
even a flat tire and the jack and tool kit are
p ro perly secured in the luggage compart­
ment and are not loose in the passenger
compa rtment.
- In an accident or sudde n maneuver they
could fly forward , injur ing anyone in the ve­
h icl e.
- Always store damaged wheel, jack and tools
securely in the luggage compartment. Oth­
erwise, in an acc ident or sudden maneuver
they could fly forward, causing injury to pas­
sengers in the ve hicle.
Space-saving spare tire
Applies to: vehicles with space-saving spare tire
-
The spare tire is intended fo r short-term use on­
ly. Have the damaged tire checked and replaced,
if necessary, by an authorized Audi dea ler or au­
thori zed Audi Service Facility as soon as possible.
T he re are some restrictions on the use of the
spare tire. The spare tire has been designed spe­
cifically for your type of vehicle . Do not rep lace it
with the spare tire from another type of vehicle .
T he tire press ure must be 61 PS I (420 kPA).
Removing the spare tire
~ Lift the cargo floor using the p lastic handle and
hook the handl e onto the luggage compa rt­
ment seal
¢page 343, fig . 258.
~ Remove the handle by turning it counter-clock­
wise and remove the spare tire.
~ Unhook the cargo floor before closing the rear
lid.
Snow chains
For technical reasons, the use of snow chains on
the compact spare tire is not pe rmitted .
If you have to drive w ith snow chains and a front
tire fails , mount the spare wheel in place of a .,..
349

When jump starting or charging 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 negat ive 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. 274 Engine co mpa rtment: connecto rs for jump start
cables and a charger
@
Fig. 275 Ju mp sta rting us ing a battery in another vehicle:
@ -providing cu rre nt, @ - drained
The procedure described below for connecting
jumper cables is intended to provide a jump start
for your vehicle.
Vehicle with discharged battery
.. Turn off lights and accessories, move automatic
transmission lever to N (Neutral) or P (Park)
and set parking brake .
Emergency situations
Connecting the positive cable (red) to the
po sitive terminal
.. Open the red cover on the positive terminal
r=>fig.274 .
1. Secure one end of the positive cable (red) to
the jump start pin
r=> fig. 275 (D (pin under
the red cover = "posit ive") on the vehicle that
needs to be started @.
2. Secure the other end of the pos itive 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 black negat ive cab le to
the negative terminal @on the battery that
i s p roviding 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
s ur e that the jumper clamps are well connected
with their
metal ports 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 . ..,_
357

Emergency situations
-When connecting jumper cables, make sure
that they cannot get caught in any moving
parts in the engine compartment.
- Do not bend over the batteries -danger of
chemical burns!
- The battery cell locking screws must be
tightened securely.
- Before you check anything in the engine
compartment, always read and heed all
WARNINGS
c> page 304.
(D Note
Improper hook-up of jumper cables can ruin
the generator.
- Always connect POSITIVE(+) to POSITIVE
(+), and NEGATIVE(-) to NEGATIVE(-)
ground post of the battery manager control
unit.
- Check that all screw p lugs on the battery
cells are screwed in firmly. If not, tighten
plugs prior to connect ing clamp on negative
battery terminal.
- Please note that the procedure for connect ­
i ng a jumper cable as described above ap­
plies specifically to the case of your vehicle
being jump started . When you are giving a
ju mp start to another vehicle, do
not con­
nect the negative (-) cable to the negative
(-) terminal on the discharged batte ry @
c> fig. 2 75. Instead, securely connect the
negative( -) cab le to either a solid metal
component that is firm ly bolted to the en­
gine block or to the engine block itself. If
the battery that is being charged does not
vent to the outside, escap ing battery gas
could ignite and explode!
Towing with a tow truck
General hints
Your Audi requires special handling for towing.
The following information is to be used by com­
mercial tow truck operators who know how to op­
erate the ir equipment safely.
-Never tow your Audi, towing will cause dam­
age to the engine and transmission.
358
-Never wrap the safety chains or winch cables
around the brake lines .
- To prevent unnecessary damage, your Audi
must be transported with a flat bed truck .
- To load the vehicle on to the flat bed, use the
towing loop found in the vehicle tools and at­
tach to the front or rear anchorage
i:> page 358 and c> page 359 .
A WARNING
A vehicle being towed is not safe for passen­
gers. Never allow anyone to ride in a vehicle
being towed, for any reason.
Front towing loop
Only install the front towing loop when it is
needed.
Fig. 276 Front bumper: installing the towing loop
The threaded opening for the towing loop is lo­
cated on the right s ide of the front bumper.
.,. Remove the towing loop from the vehicle too l
ki t
c> page 343 .
.,. Press the cap inward with brief, forceful p res­
sure
c> fig. 2 76. The cap will loosen from the
bumper .
.,. Insert the towi ng loop all the way into the
threaded opening and tighten it with a wheel
wrench.
.,. After using, place the towing loop back in the
vehicle tool kit .
A WARNING
If the towing loop is not tightened until it
stops when installing, the threads may be
pulled out when towing the vehicle and that
could cause an accident.
-

Rear towing loop
Fig. 277 Rea r bumper: install ing the tow ing loop
The threaded opening for the towing loop is lo­
cated on the r ight rear of the bumper.
.. Remove the towing loop from the vehicle tool
kit
¢page 343.
.. Press the cap inward with brief, forcefu l pres­
sure ¢
fig. 277. The cap will loosen from the
bumper .
.,. Insert the towing loop all the way into the
threaded opening and tighten it w ith a wheel
wrench .
.. After using, place the towing loop back in the
vehicle tool kit.
A WARNING
If the towing loop is not tightened until it
stops when installing, the threads may be
pulled out when tow ing the vehicle and that
cou ld cause an accident .
Loading the vehicle onto a flat bed truck
Fig. 278 Vehicle on flat bed truck
Front hook up
-
.. Align the vehicle with the centerline of the car
carrier ramp.
Emergency situations
.. Attach the winch hook to the front towline eye
previously installed.
Rear hook up
.. Align the vehicle with the centerline of the car
carrier ramp .
.. Attach the w inch hook to the rear towline eye
previously installed.
(D Tips
Check carefully to make sure the hook-up is
secure before moving the car up the flatbed
truck ramp.
Raising the vehicle
Lifting with workshop hoist and with floor
jack
The vehicle may only be lifted at the lifting
points illustrated .
Fig. 279 Front lifting point
Fig. 280 Rear lif tin g po int
.. Read and heed WARNING ¢&, .
.. Locate lifting points¢
fig. 279 and¢ fig. 280.
.,. Adjust lifting arms of workshop hoist or floor
jack to match vehicle lifting points .
.. Insert a rubber pad between the floor jack/
workshop hoist and the lifting points . .,.
359