engine AUDI RS7 SPORTBACK 2016 Repair Manual

Checking and Filling
should be between the "min " and "max" mark­
ings. When the engine is warm, the level may
be slightly above the "max" marking.
The location of the coolant expansion tank can be
seen in the engine compartment illustration
<::> page 205.
To obtain an accurate reading, the engine must
be switched off.
The expansion tank in your vehicle is equipped
with an electric coolant level sensor.
When the coolant level is too low, the warning
light in the Auto-Check System <::>
page 15 will il­
luminate until you add coolant and the level has
been restored to normal. Even though there is an
electric coolant level sensor, we still recommend
you check the coolant level from time to time.
Coolant loss
Coolant loss may indicate a leak in the cooling
system. In the event of coolant loss, the cooling
system should be inspected immediately by your
authorized Audi dealer. It is not enough merely
to add coolant.
In a
sealed system, losses can occur only if the
boiling point of the coolant is exceeded as a re­
sult of overheating.
A WARNING
The cooling system is under pressure and can
get very hot. Reduce the risk of scalding from
hot coolant by following these steps.
-Turn off the engine and allow itto cool down.
- Protect your face, hands and arms from es­ caping fluid and steam by covering the cap
with a large, thick rag.
- Turn the cap slowly and very carefully in a counter-clockwise direction while applying
light, downward pressure on the top of the
cap.
- To avoid being burned, do not spill anti­
freeze or coolant on the exhaust system or
hot engine parts . Under certain conditions,
the ethylene glycol in engine coolant can
catch fire .
210
(D Note
Do not add any type of radiator leak sealant
to your vehicle's engine coolant. Adding radia­
tor repair fluid may adversely affect the func­
tion and performance of your cooling system
and could result in damage not covered by
your New Vehicle Limited Warranty .
Adding coolant
Be very careful when adding engine coolant.
Before you check anything in the engine compart­
ment,
always read and heed all WARNINGS
<::>.& in Working in the engine compartment on
page 203 .
.. Requirement: There must be a residual amount
of coolant in the expansion tank
i:::>Q) .
.. Turn off the engine .
.. Let the engine cool down .
.. Place a thick rag over the coolant expansion
tank <::>
page 209, fig. 186 and carefully twist
the cap counter-clockwise
c::> &,.
.. Add coolant mixed in the correct ratio
<::> page 209, Coolant up to the MAX marking.
.. Make sure that the fluid level remains stable.
Add more coolant if necessary.
.. Twist the cap on again
tightly.
Replacement engine coolant must conform to ex­
act specifications <::>
page 209, Coolant.
We recommend using only coolant additive G12+
+, G13 or in an emergency G12+ . Do
not use a
different additive. In an emergency use plain wa­
ter until you can get the correct additive and can
restore the correct ratio. This should be done as
soon as possible.
If you have lost a considerable amount of cool­
ant, then you should add cold antifreeze and cold
water only when the engine is cold.
Always use
new engine coolant when refilling.
Do not fill coolant above the "MAX" mark . Excess
coolant will be forced out through the pressure
relief valve in the cap when the engine becomes
hot.
~

,&_ WARNING
-The cooling system is under pressure and
can get very hot. Reduce the risk of scalding
from hot coolant by following these steps.
- Turn off the engine and allow it to cool
down.
- Protect your face, hands and arms from
escaping fluid and steam by covering the
cap with a large, thick rag.
- Turn the cap slowly and very carefully in a
counter-clockwise direction while applying light, downward pressure on the top of
the cap.
- To avoid being burned, do not spill ant i­
freeze or coolant on the exhaust system or
hot engine parts. Under certa in condi­
tions, the ethylene glycol in engine cool­
ant can catch fire.
- Antifreeze is poisonous. Always store anti­
freeze in its original container and well out
of the reach of children.
- If you drain the coolant, it must be caught
and safely stored in a proper container
clearly marked "poison" .
(D Note
-Do not add coolant if the expansion tank is
empty. Air could enter the cooling system
and damage the eng ine. If this is the case,
do not continue driving. Seek professional
assistance.
- Coolant pollutes the environment and could
cause an engine fire. Excess coolant will be
forced out through the pressure relief valve
i n the cap when the engine becomes hot .
- If, in an emergency, only water can be add­ ed, the correct ratio between water and an­
tifreeze
¢ page 209 must be restored as
soon as possible.
@ For the sake of the environment
Drained coolant should not be reused. Always
dispose of used coolant while observing all
environmental regulat ions.
-
Checking and Filling
Radiator fan
The radiator fan switches on automatically by it­
self .
An auxiliary electric radiator fan switches on and
off depending on coolant temperature and other
vehicle operating conditions.
After you switch the engine off, the auxiliary fan
can continue running for up to 10 minutes -even
with the ignition off. It can even switch on again later by itself ¢&. , if
- the temperature of the engine coolant rises due
to the heat build-up from the engine in the en­ gine compartment, or
- the engine compartment heats up because the
vehicle is parked in intense sunlight.
A WARNING
--
- To reduce the risk of personal injury never
touch the radiator fan .
- The auxiliary electric fan is temperature
controlled and can switch on suddenly even
when the engine is not running .
- The auxiliary radiator fan switches on auto­
matically when the engine coolant reaches a
certa in temperature and will continue to run
until the coolant temperature drops.
Brake fluid
Checking brake fluid level
Fig. 187 En g in e compar tment: cover on the b rake fluid
rese rvoir
Before you check anything in the engine compart­
ment,
always read and heed all WARNINGS
¢ & in Working in the engine compartment on
page 203 . .,.
211

Checking and Filling
"' Read the brake fluid level from the brake fluid
reservoir
¢ fig. 187, ¢page 205, fig. 183. The
brake fluid level must be between the "MIN"
and "MAX" markings.
The location of the brake fluid reservoir can be
seen in the engine compartment illustration
c>page205.
The fluid level may drop slightly after some time
due to the automatic adjustment of the brake
pads. This is not cause for alarm.
If the brake fluid level falls considerably below
the "MIN" mark, the brake warning/indicator
light
1111 (U.S. models)/ . (Canadian models)
will come on¢
page 14. Do not continue to oper­
ate the vehicle. The complete brake system
should be thoroughly checked by an authorized
Audi dealer or other qualified facility and the
cause corrected . If the brake fluid level is too
low, the brake warning/indicator light will illumi­
nate. Contact an authorized Audi dealer
immedi­
ately.
Changing brake fluid
Have the brake fluid changed by an experienced
technician.
Brake fluid absorbs moisture from the air . If the
water content in the brake fluid is too high , cor­
rosion in the brake system may result after a pe­
riod of time. The boiling point of the brake fluid
will also decrease considerably and decrease
braking performance.
Therefore, the brake fluid must be changed
every
two years.
Always use new brake fluid which con­
forms to Federal Motor Vehicle Standard "FMVSS
116 DOT 4".
The brake fluid reservoir can be difficult to reach,
therefore, we recommend that you have the
brake fluid changed by your authorized
Audi
dealer.
Your dealer has the correct tools, the
right brake fluid and the know-how to do this for
you.
212
A WARNING
-
- Brake fluid is poisonous. It must be stored
only in the closed original container out of
the reach of children!
- Brake failure can result from old or inappro­
priate brake fluid. Observe these precau­
tions:
- Use only brake fluid that meets SAE speci­
fication
J 1703 and conforms to Federal
Motor Vehicle Standard 116. Always check
with your authorized Audi dealer to make
sure you are using the correct brake fluid.
The correct type of brake fluid is also indi­
cated on the brake fluid reservoir .
- The brake fluid must be new. Heavy use of
the brakes can cause a vapor lock if the
brake fluid is left in the system too long .
This can seriously affect the efficiency of
the brakes as well as your safety. This
could result in an accident.
(D Note
Brake fluid will damage the paint of your vehi­
cle.
@ For the sake of the environment
Because of the problem of proper disposal of
brake fluid as well as the special tools re­
quired and the necessary expertise, we rec­
ommend that you have the brake fluid
changed by your authorized Audi dealer .
Battery
General information
Under normal operating conditions, the battery
in your Audi does not need any maintenance.
With
high outside temperatures or long daily
drives we recommend that you have the electro­
lyte level checked by a service facility. The elec­
trolyte level should also be checked each time
the battery is charged ¢
page 214.
Have the battery checked when you take your ve­
hicle in for service. You are well advised to re­
place a battery that is older than S years.

Checking and Filling
-If you get battery acid in your eyes or on
your skin, immediately rinse with cold wa­
ter for several minutes and get medical at­
tention .
- If you should ingest any battery acid, seek
medical attention immediately.
- Do not expose the battery to an open flame,
electric sparks or an open light .
- Do not smoke.
- Do not interchange the positive and nega-
tive cables.
- When working on the battery, be sure not to
short-circuit the terminals with tools or oth­
er metal objects. This would cause the bat­
tery to heat up very quickly, which could lead to damage or explosion and personal
injury.
- When a battery is charged, it produces hy­
drogen gas which is explosive and could
cause personal injury.
- Always keep the battery well out of the
reach of children.
- Before work is done on the electrical sys­
tem, disconnect the negative ground cable.
- Before performing any work on the electri­
cal system, switch off the engine and igni­
tion as well as any electrical equipment. The negative cable on the battery must be dis­
connected. If you are just going to replace a
light bulb, then it is enough to switch off
the lights.
- Before disconnecting the battery, switch off
the anti-theft alarm system! Otherwise you
will set off the alarm.
- When disconnecting the battery, first dis­
connect the negative cable and then the
positive cable.
- Before reconnecting the battery, make sure
all electrical consumers are switched off.
Reconnect the positive cable first and then
the negative cable. Never interchange the
cables - this could start a fire!
- Never charge a frozen or a thawed-out bat­
tery. It could explode! If a battery has fro­
zen, then it must be replaced. A discharged
battery can freeze over at 32 °F (0 °C).
- Make sure the vent hose is always attached
to the opening on the side of the battery.
214
- Never use batteries which are damaged .
There is the danger of an explosion! Always
replace a damaged battery.
A WARNING
California Proposition 65 Warning:
- Battery posts, terminals and related acces­
sories contain lead and lead compounds,
chemicals known to the State of California
to cause cancer and reproductive problems.
Wash hands after handling.
(D Note
- Do not disconnect the vehicle battery when
the ignition is on or when the engine is run­
ning, otherwise, you will damage electronic
components in the electrical system.
- If your vehicle is going to stand for a long
period of time without being driven, protect
the battery from "freezing", otherwise it
will be damaged and will then have to be re­
placed .
- When opening the doors, the windows low­
er approximately 10 mm automatically. This
function is not available when the battery is
disconnected, which means there is a risk
that the door seal or the window could be
damaged.
Battery charging
Starting the engine requires a well charged bat­ tery.
Fig . 188 En g in e compartment: con nectors fo r a charger
and jump start cab les

Always r ead and h eed all W ARNING S below
~ A. and
¢A. in Working on the battery on
page 213.
.,. Switch off the ignition and all electrica l con­
sumers .
.,. Make sure the area is well venti lated when you
charge the battery.
.,. Open the engine hood
¢page 203.
.,. Open the red cover on the positive pole
¢fig . 188 .
.,. Connect the charger co nnectors according to
the instructions to the
j ump start bo lt s. (Bolts
under the red cover= "positive", Bolts with hex
head
= "negat ive") .
.,. Only now plug the mains lead for the charging
equipment into the wall outlet and turn it on
¢&_ .
.,. M ake s ure th e char ging rate is not o ver
30 amp s/14.8 Volt.
.,. When the battery is fully charged: Turn the
charg ing equipment off and remove the mains
lead from the wall outlet.
.,. Now remove the clamps for the charging equ ip-
ment.
.,. Close the red cover on the positive pole.
.,. Close the hood
¢ page 204.
A discharged battery can fre eze at temperatures
of only 32 F
0 (0 °C). A llow a frozen battery to
thaw comp lete ly before attempt ing to charge it
¢ ,&. However, we recommend not using a
thawed battery again because the battery casing
can be cracked due to ice formation and can leak
battery acid.
Battery chargin g (Ma ximum cha rging rate of
30 amp s/14 .8 Volt )
When charging at low voltages (e.g. with a trick­
le cha rger ),
the battery cables do not have to be
d isconnected first. The battery caps should
not
be opened when charging a battery .
It is not necessary to remove the battery from
the luggage compartment, and it is also not nec­
essary to disconnect the cables.
Check ing and Filling
Fast charging the batt ery (charging rate
ab ove 14.8 Volt )
For technical reasons do not use a battery charg­
er that uses vo ltage greater than 14.8 Volt to
charge your vehicle's battery.
A WARNING
=
Charging a battery can be dangerous .
-Always follow the operating instructions
provided by the battery charger manufactur­
er when charging your battery .
- Never charge a frozen battery. It may ex­
plode because of gas trapped in the ice. Al­
low a froze n battery to thaw out first .
- Do not reuse batter ies which were frozen.
The battery hous ing may have cracked and
weakened when the battery froze .
- Charge the battery in a well ventilated area.
Keep away from open flame or electrical
spark. Do not smoke . Hydrogen gas generat­
ed by the battery is explos ive.
- To reduce the danger of explosion, never connect or d isconnect charge r cables while
the charger is ope rating .
- Fast charg ing a battery is dangerous and
should only be attempted by a competent
technicia n w ith the prope r equipment.
- Batte ry acid that may spill during charging
should be washed off w ith a so lution of
warm water and baking soda to neutra lize
t he acid .
{[) Note
Never use a fast charger as a booster to start
the e ngine. This will se riously damage sensi­
tive electronic components, such as control
units, re lays, radio, etc., as well as the bat tery
charge r.
Battery replacement
The new battery must have the same specifica­
tions and dimensions as the original equipment
battery .
Intelligent ene rgy manageme nt in yo ur vehicle is
responsib le for distr ib uting the electrica l energy
Iii>-
215

Check ing and F illing
througho ut your vehicle ¢ page 186 . The intelli­
gent energy management system wi ll keep the
engine battery charged better than veh icles with­
out this system . To make sure the addit ional
electrical energy is avai lab le once again after you
have changed the battery, we recommend that
you install batter ies of t he same type and manu­
facture on ly (the same as those insta lled at the
time your veh icle was delive red). Spec ificat ions
are listed on t he b attery housing. Your author­
i z ed dealer must code the battery in the energy
management system to enable you to use the en ­
ergy manag ement functions correctly after re­
p lacing the battery.
The new battery must have the same capac ity,
voltage (12 -vo lt), amperage, const ruction and
p lug sealing .
W hen insta lling the ba tte ry, make sure the igni ­
tion and all elec trical consumers are sw itched
off .
(D Note
Mak e sure the ve ntila tio n hose on t he side of
the batte ry is connecte d, othe rw ise f umes o r
battery acid can lea k out .
@) For the sake of the environment
Because of the prob lem of pr oper disposal of
a ba ttery, we recommen d your au thor ized
Audi dea le r change the battery fo r you. Bat ­
teries contain su lf u ric acid and lea d and must
always be disposed o f prope rly in comp liance
w ith all environmental regulations. D isposing
of vehicle batteries improperly is very danger­
ous to the e nvironment.
216
Windshield washer
system
Fi g. 189 En gin e compar tm en t: was her flui d rese rvoir cap
.., N
-N ~ a, m
The w indshield washer reservoir O contains the
cleaning so lution for the windshie ld and the
headlight washer system *
9 page 205, fig. 183.
The reservoir capacity is found in 9 page 260 .
To reduce the risk of lime scale depos its on the
spray nozzles, use clean water with low amo unts
of calcium. Always add w indow cleaner to the wa­
ter. When the outside temperatures are cold, an anti-freez ing agent shou ld be added to the water
so that it does not freeze .
(D Note
-The concentration of ant i-f reez ing agent
must be adjusted to the ve hicle operat ing
conditions i n the respective cl imate . A con­
cen tration t hat is too high can lead to vehi­
cle damage.
- Never ad d radia tor an ti-freeze or other addi ­
t ives to the washer fluid .
- Do not use a glass cleaner t hat contains
paint so lvents, because th is could damage
the pain t.
Service interval display
The service interval display detects when your ve­
hicle is due for service .
The service interval d isplay wo rks i n two stages:
- Inspection or oil change rem inder: after a cer-
tain distance drive n, a message appears in the
instrument cluster display each t ime t he igni ­
tion is switched on o r off . The remaining d is-
t ance o r time is disp layed b riefly. .,..

-Inspection or oil change due: If your vehicle
has reached an inspection or oi l change interval
or both intervals at the same time, the mes­
sage
Inspection due! or Oil change due! or Oil
change and inspection due!
appears briefly af­
ter switching the ignition on/off .
Checking service intervals
You can check the remaining distance or time un­
til the next oil change or next inspection in the
Car menu. To do this, select: the
ICARI function
button
> (Car)* Systems control button > Service
& control > Service intervals.
Resetting the indicator
Your authorized Audi dealer or authorized Audi
Service Facility will reset the service interval dis­
p lay after performing service.
I f you have changed the oil you rself, you must re­
set the oil change interval.
To reset the indicator, select: the
ICARI funct ion
button
> (Car)* Systems control button > Service
& control > Service intervals. Turn the contro l
knob downward to
Reset oil change interval and
press the control knob.
@ Note
-Only reset the oil change indicator if the oil
was changed .
- Following the service inte rvals is critical to
maintain ing the service life and va lue of
your vehicle, especially the engine . Even if
the mileage on the vehicle is low, do not ex­
ceed the time for the next serv ice.
- Calcu lating the time to the next o il change
i s interrupted when the vehicle battery is
disconnected. If the veh icle is not driven for
a long period of time, check the ma inte­
nance schedule so that you can follow the
maintenance intervals.
Checking and Filling
217

Wheels
Model/ Tire designation Tire pressure
Engine Normal load Maximum load
(up to 2 people)a>
front rear front rear
PSI
RS 7 275/35 ZR20 102Y XL
Sportback: High Performance
36
4.0L 275/30 ZR21 98Y XL
8 cylinders High Performance
44
a) 2 people in the front
A WARNING
Please note the important safe­
ty precautions regarding tire
pressure ¢
page 228 and load
limits ¢
page 230.
Tires and vehicle load limits
There are limits to the amount of
load or weight that any vehicle
and any tire can carry. A vehicle
that is overloaded will not handle
well and is more difficult to stop. Overloading can not only lead to
loss of vehicle control, but can al­
so damage important parts of the
vehicle and can lead to sudden
tire failure, including a blowout and sudden deflation that can
cause the vehicle to crash.
Your safety and that of your pas­ sengers also depends on making
sure that load limits are not ex­
ceeded . Vehicle load includes ev­
erybody and everything in and on
230
kPA PSI kPA PSI kPA PSI kPA
25 0 33 230 39 270
39 270
30 0 39 270 45 310 45
310
the vehicle. These load limits are
technically referred to as the vehi­
cle's
Gross Vehicle Weight Rat­
ing
("GVWR").
The "GVWR" includes the weight of the basic vehicle, all factory in­
stalled accessories , a full tank of
fuel, oil, coolant and other fluids
plus maximum load. The maxi­
mum load includes the number of
passengers that the vehicle is in­
tended to carry ("seating capaci­
ty") with an assumed weight of 150 lbs. (68 kg) for each passen­
ger at a designated seating posi­
tion and the total weight of any luggage in the vehicle. If you tow
a trailer, the weight of the trailer hitch and the tongue weight of
the loaded trailer must be includ­ ed as part of the vehicle load.
The
Gross Axle Weight Rating
("GAWR") is the maximum load

Emergency assistance
Equipment
Warning triangle
Applies to: ve hicles with warning triangle
D
Fig. 196 Luggage co mpa rtment lid : w arnin g tria ngle
The warning triangle placed in the vehicle at the
factory is located in the luggage compartment.
• Turn the twist lock ¢
fig. 196 and pull the cover
downward to open the cover .
• Remove the warning triangle from its holder.
The luggage compartment lid is only designed to hold the warning triang le offered by the original
accessories program.
Vehicle tool kit
F ig. 197 Luggage co mpa rtment : veh icle tool kit
The vehicle tool kit , vehicle jack*, tire mobi lity kit
and compressor are stored in the luggage com ­
partment under the cargo floor cover .
• Lift the cargo floor by the plastic handle.
• Turn the handle counter-clockwise and remove
the cover .
Emergen cy a ssis tanc e
A WARNING
-Improper use of the veh icle jack can cause se-
rious pe rsonal injuries.
- 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-supplied jack is intended only
for your veh icle model. Under no circum­
stances s hou ld it be used to lift heavy
veh icles o r othe r loads; you risk in juring
yourse lf .
- Neve r start the engine when the ve hicle is
raised, which co uld cause an acciden t.
- Support the vehicle securely with appropri­
ate stands if work is to be pe rformed under­
neath the vehicle; otherwise, there is a po ­
t ential risk for injury .
- Neve r use the ja ck supplied w ith your Aud i
on anot her vehicle, particularly on a heavier
one. The jack is only s uitable for use on the
vehicle it came with.
(D Tips
The vehicle jack* in your vehicle is m ainte­
nance -free .
Tire repair set
General and safety pointers
Tire repair is intended only for temporary, short­
term use.
F ig. 198 Tire damage for wh ich the Tire Mob ility Sys tem is
not s uited
IIJI,
239

Replacing wheels
Before changing a wheel
Observe the following precautions for your own
and your passenger's safety when changing a
wheel.
.,. After you experience a tire failure, pull the car
well away from moving traffic and try to reach
level ground before you stop¢.,&..
.. All passengers should
leave the car and move
to a safe location (for instance, beh ind the
guardrail)¢ .,&. .
.,. Engage the
parking brake to prevent your vehi­
cle from rolling unintentionally¢ .,&..
.. Move
selector lever to position P ¢ .,&. .
.. Take the
jack out of the luggage compartment
c:>page 239.
A WARNING
You or your passengers could be injured while
chang ing a wheel if you do not follow these
safety precautions:
- If you have a flat tire, move a safe distance
off the road. Turn off the engine, turn the
eme rgency flashers on and use other warn­
ing devices to alert other motorists.
- Make sure that passengers wait in a safe
place away from the vehicle and well away
from the road and traffic.
- To help prevent the vehicle from moving
sudden ly and possibly slipping off the jack,
always fully set the parking brake and block
the wheel diagonally opposite the wheel be ­
ing changed . 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 124.
(D Note
If you are changing the whee l on a steep in­
cline, use a rock or similar object to b lock the
Emergency assistance
opposite wheel to prevent the vehicle from
moving.
(D Tips
- Before changing the wheel, you must acti­
vate the jacking mode, so that the automat­
ic controls for the Adaptive Air Suspension*
do not make it more difficu lt to lift the vehi­
cle with the jack
c> page 245.
- Obey all laws .
Changing a wheel
When you change a wheel, follow the sequence
described below step-by-step and in exactly thot
order .
1. Activate the vehicle jack mode* c> page 245.
2. Remove the
wheel bolt caps*. For more de­
tails see also
¢ page 244, Wheels with
wheel bolt caps.
3. Loosen the wheel bolts c:> page 244.
4. Locate the proper mounting point for the
jack and align the jack below that point
~page 245.
5. Raise the car with the jack c:> page 245.
6. Remove the
wheel with the flat tire and then
install the other whee l¢
page 246.
7. Tighten all whee l bolts lightly.
8.
Lower the vehicle with the jack.
9. Use the wheel bolt wrench and
firmly tighten
all wheel bolts
c> page 244.
10. Replace the
wheel bolt caps*.
11. Deact ivate the vehicle jack mode* in the
MMI:
I CARI funct ion button> (C ar )* systems
contro l butto n > Servicing & checks > Air
susp.: jack mode >
Off.
The vehicle jack mode* switches off automat ical­
ly at speeds above 6 mph (10 km/h) .
A WARNING
-
Always read and follow all WARNINGS and in-
formation
¢ .&. in Raising the vehicle on
page
245 and ¢ page 247.
243