2014 AUDI RS7 SPORTBACK overheating

22 Instruments and warning /indicator lights
@.D Light/rain sensor
II Automatic headlights/automatic wiper s:
sys tem fault
If the indicator light turns on and th is mes­
sage appears, the light/ra in sensor is not
functioning correctly.
For safety reasons the low beams are turned
on permanently w ith the switch in
AUTO .
However, you can continue to turn the lights
on and off using the light switch. You can still
control all functions that are independent of
the rain sensor through the windshield wiper
lever.
Contact your author ized Audi dealer as soon
as possible to have the prob lem corrected.
; Adaptive dampers
Appl ies to vehicles: with adaptive dampers
B Suspension: System fault! You can contin­
ue driving
If the B symbo l in the display comes on, the re
i s a malfunction in the adaptive dampers.
Please go to an authorized Audi dea ler or oth­
er qualified workshop to have the ma lfunction
repaired.
!- I Sport differential
Applies to vehicles: with sport d ifferent ial
Ill Sport differential: system fault
There is a malfunction with the sport differen­
tial.
Drive to your authorized Aud i dealer immedi­
ately to have the mal function cor rected .
Ill Sport differential: overheating
The transmission temperature has increased
significantly due to the sporty driving manner .
Drive in a less sporty manner until the tem­
pe rature returns to the normal range and the
indicator light switches of.
A WARNING
Contact your author ized Audi dealer or a
qualified workshop if the sport differential
i s faulty or malfunct ioning . The repair
must be performed by trained personnel
using the correct oil in order to ensure
safety.
¢¢ Turn signals
-
The indicator light blinks when you use either
turn signal.
Whenever you use the left II or the right B
turn signal, the indicator light blinks . When
you use the emergency flashers, both indica­
tor lights flash .
If one of the turn signal light bulbs burn out,
the turn signal will blink twice as fast as nor­
mal. Carefu lly dr ive to your authorized Audi
dealer immediate ly to have the malfunction
corrected.
(D Tips
For more information on the turn signals,
refer to ¢
page 46.
CRUISE /11
(') Cruise control
T he warning/indicator light lij;jl)~i~ (USA mod­
els)/ lil (Canada models) illuminates when
the cruise control is activated ¢
page 79.

190 Intelligent technology
differential lock (EDL), dynamic steering* and
selective whee l torque control. ESC is switch­
ed on all the t ime. In certa in situations when
you need less traction, you can switch off ASR
by pressing the button
[ill c> page 191,
fig. 180. Be sure to switch ASR on again when
you no longe r need less traction .
Anti-loc k br ak ing system (ABS)
ABS prevents the wheels from locking up
when braking. The vehicle can still be steered
even during hard brak ing. Apply steady pres­
sure to the brake pedal. Do not pump the ped­
al. A puls ing in the brake pedal ind icates that
the system is he lp ing you to b rake the vehicle.
B rake as sist sys tem
The brake assist system can decrease braking
d istance. It increases braking power when the
driver presses the brake pedal quick ly in emer ­
gency situations. You must p ress and hold the
b rake pedal until the situation is over. I n
vehicles w ith adaptive cru ise cont rol*, the
b rake assist system is more sens it ive if the
d istance detected to the vehicle ahead is too
smal l.
Anti-slip regulation (ASR)
ASR reduces engi ne power when the d rive
wheels begin to spin and ad apts the fo rce to
the road condit ions. This makes i t easier to
start, accelerate and drive up hills .
Electronic differential lock (EDL)
The EDL brakes wheels that are spinning and
transfers the d rive powe r to the other d rive
wheel o r whee ls if the vehi cle is equipped wi th
a ll-w hee l drive* . This function is available up
to about 75 mph (120 km/h).
I n extreme cases, ED L automat ica lly swit ches
off to help keep the brake o n the braked whee l
from overheating . EDL wi ll switch on again au­
tomatically when conditions have returned to
norma l.
Dynamic steering*
On vehi cles w ith dy namic stee ring*, ESC helps
stabilize the steering i n critical s ituations.
Selective wheel torque control
T he sele ctive whee l torq ue con trol ope rates
when driving through c urves . The front whee l
on the inside of th e curve o r both wheels on
the inside of the curve are braked selectively
as needed. This minimizes sliding in the front
whee ls and allows for more precise driving
t hr ough curves. The appl icable system may
not act ivate when dr iv ing in wet or snowy con­
ditions .
,&. WARNING
-ESC, ABS, ASR, EDL, dy namic steeri ng*
and the select ive wheel torq ue con trol
c a nnot ove rcome the laws of physics.
T his is especially important on slippery
or wet roads.
If the systems begin acting
to stabilize your veh icle, yo u should im­
mediately change your speed to match
the road and traffic conditions. Do not
let the increased safety provided by
these systems tempt you to take r isks.
Doing so will increase the risk of a loss of
veh icle cont ro l, collision and ser ious per­
sonal injur ies.
- Always adapt your speed to road, traffic
and wea ther conditions. The risk of los­
ing con trol of t he vehicle increases when
d riving too fast, espec ially through
curves and on slippery or wet roads, and
when dr iving too close to vehicles up
ahead. ESC, ABS, the brake assist sys­
tem, ASR, EDL, dynam ic steering* and
the selective wheel torque contro l can­
not prevent collisions .
- Always accelerate with special care on
even, smooth su rfaces such as those that
are wet or covered with ice and snow .
The drive wheels can spin eve n w ith
these assistan ce systems that cannot al­
ways he lp to re duce the risk of loss of ve ­
h icle control.
(D Tips
- ABS and ASR o nly wo rk correctly when
all four wheels are equipped with identi­
cal tires. D iffe ren t tire si zes can lead to a
reduction in engine power.
-
...

200 Driving and en vir onm ent
_& WARNING
The temperature o f the exhaust system is
high, both when driving and after stopping
the engine .
- Never touch the exha ust tail pipes once
they have become hot. This could result in burns .
- Do not park or operate the veh icle in
areas where the hot exhaust system may
come in contact with dry grass, brush,
fuel spill or other material which can cause a fire .
- Do not apply additional undercoating or
rustproofing on or near the exhaust
man ifold , exhaust p ipes, catalytic con ­
verter or heat shie lds. D uri ng d riving, the
substance used for undercoating cou ld
over heat and cause a fire .
(I) Note
- Be aware that just one tank filling with
l eaded fuel will already seriously de­
grade the perfo rmance of the cata lytic
conve rter.
- Do not exceed the correct engine oil leve l
¢page 218.
- Do not d rive until the fuel tank becomes
completely empty. The eng ine could mis­
fire. Unburned f uel could a lso ge t in to
t h e exhaus t sys tem and this could cause
the ca talyt ic converte r to ove rheat.
- Do no t switch off the ign ition wh ile the
vehicle is moving.
- Do no t continue to operate yo ur vehicle
u nder these condi tions, as otherw ise fuel
can reach the catalytic converter . This
could result in overheating of the co n­
verter, req uiring its replacement.
- To assure efficient operation of the Emis ­
sion Control System :
- Have your veh icle maintained properly
and in accordance with the service rec­
ommendations in your Wa rranty
&
Ma intenance booklet.
- Lack of proper maintenance as well as
improper use of the vehicle will impa ir the function of the em
ission cont ro l
system and could lead to damage .
~ For the sake of the env ironment
Even when the Emiss ion Con trol Sys tem is
operat ing proper ly, the exha ust gas can
have a sulfur-li ke ex haust gas smell under
some operat ing states . This depends on
the sulfur content of the fuel being used .
Using a different brand of fue l may help,
or filling the tank with lead -free super
grade gasoline .
Shutting down vehicle
If you would like you r vehicle to remain inop­
erative for a longer per iod of t ime, contact an
Audi o r other spec ia lized dealer. They can ad­
v ise you on ne cessa ry precautions e .g. co rro­
s io n preven tion , maintena nce and s to rage.
Pay a ttent ion to addi tional in fo rmat ion con­
cerning the battery. Refer to ¢
page 223 .
Operate your vehicle
economically and
minimize pollution
General
Your p ersonal style of driving will determine
the economy of your vehicle , as well as ex ­
haust and nois e le ve ls .
Fu el economy, environmenta l impact, and
wear on your engine , brakes and tires largely
depend on three factors:
- your personal d riving style
- operati ng conditions
- technical limitat ions
If you an tic ip ate what you need to do next and
drive economically, you can easily cut your
fuel consumpt io n by 10 -15 percent . This sec ­
t ion w ill give you some tips on how you can
help the e nvir onment and your pocketbook .

220 Check ing and filling
Engine cooling system
Coolant
The engine coolant performs two functions: it
keeps the engine from overheating and it pro ­
tects the engine from freezing in the winter .
The cooling system is sealed and generally re­
quires little attention.
The cooling system has been filled at the fac­
tory with a permanent coolant which does not need to be changed. The coolant consists of a
mixture of specially conditioned water and the
manufacturer's glycol-based coolant addi-
tive G13 antifreeze with ant icorros ion addi­
tives (50% for USA models; 60% for Canadian models) . This mixture both assures the neces­
sary frost protection and protects metal com­
ponents in the engine's cooling system from
corrosion and scaling.
It a lso raises the boil­
ing point of the coo lant.
D o not reduce the concentration o f the coo l­
ant in the summer by adding plain water .
The
proportion of coolant add it iv e mu st be at
lea st 50 % but not mo re than 60 %
to main­
tain antifree ze protection and cooling efficien­
cy. If the coolant frost protect ion is too low,
the coolant could freeze and damage the veh i­
cle heating and eng ine cooling system .
For year-round driving, antifree ze is added at
the factory for temperatures down to:
- -31° F(-35°C)USA
- - 40 ° F ( -40 °C) Canada.
I f you must add coo lant, use a m ixture of wa­
ter and coolant addit ive. Mixing the coolant
addit ive wi th dist illed wate r is recommended.
_& WARNING
Before yo u check any thing in the engine
compartment, always read and heed all
WARNINGS
¢ &. in Working in the engine
compartment on page 213.
(D Note
- Before winter se ts in, have the coolant
checked to see if the coolant additive in
-
your vehicle is sufficient to meet the cli­ mate conditions . This is especia lly impor ­
tant if you live in a reg ion where the win­
ter is extreme ly cold. If necessary, in­
crease the proportion of coolant add itive
to 60% .
- When adding coolant additive to your
cooling system , remember :
- We recommend us ing on ly coolant ad­
d it ive G12 ++ or G1 3 (check the labe l)
for your vehicle . This coolant additive is
avai lable at autho rized Audi dea lers .
Other types of antifreeze can signifi­
cantly reduce corrosion protection. The
resu lting corrosion can cause a loss of
coolant and serious engine damage .
- Do not add any type of rad iator leak seal­
ant to your vehicle's engine coolant.
Add ing radiator repa ir flu id may adverse ­
ly affect the function and performance of
your cooling system and could resu lt in
damage not covered by you r New Ve hicle
Limited War ran ty.
Checking the engine coolant level
The engine coolant level can be checked with
a quick glance.
F ig . 1 91 Engin e compar tmen t: cover o n th e coolant
expans io n tank
Befo re you check anyth ing in the engine com­
partment,
always r ead and he ed all WARN­
INGS
¢ &_ in Working in the engine compart­
ment on page 213.
.,. Park your vehicle on a level surface .
.,. Switch off the ignition .
.,. Read the engine coo lant level from the coo l­
a nt expansion tank¢
fig . 191, ¢ page 215, ..,.

fig. 188. With a cold engine, the coolant
lev el should be between the "min" and
"max" markings. 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 illus ­
t ration
<=> page 215.
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
illuminate 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 cool­
ing 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 result of overheating.
&_ WARNING
-
The cooling system is under pressure and
can get very hot. Reduce the risk of scald­
ing 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 ap ­
plying light, downward pressure on the
top of the cap.
Checking and filling 221
-To avoid being burned, do not spill anti­
freeze or coolant on the exhaust system
or hot engine parts. Under certain condi­
tions, the ethylene glycol in engine cool­
ant can catch fire .
(D Note
Do not add any type of radiator leak seal­
ant to your vehicle 's engine coolant. Add-
ing radiator repair fluid may adversely af­
fect the function 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 com­
partment,
always read and heed all WARN­
INGS <=>.&. in Working in the engine compart­
ment on page 213.
"'Turn off the engine.
"'Let the engine cool down .
"' Place a thick rag over the coolant expansion
tank
<=> page 220, fig. 191 and carefully
twist the cap counter-clockwise <=>_& .
"'Add coolant mixed in the correct ratio
<=> page 220, Coolant.
"'Twist the cap on again tightly.
Replacement engine coolant must conform to
exact specifications <=>
page 220, Coolant.
We recommend using only coolant addi-
tive G12++, G13 or in an emergency G12+. Do
not use a different additive. In an emergency
use plain water 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
coolant , 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. Ex -
cess coolant will be forced out through the ..,.
•
•