2017 AUDI A5 CABRIOLET check engine

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@ For the sake of the environment
Because of the problem of proper disposal of
brake fluid as we ll as the special toots 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 an authorized Audi dealer or
qualified workshop. The electrolyte level should
also be checked each time the battery is charged
¢ page 205.
Have the battery checked when you take your ve­
hicle in for serv ice. You are well advised to re­
place a battery t hat is older than 5 years.
Disconnecting the battery terminals
Some vehicle functions (power window regula­
tors, for example) are lost if the battery termi­ nals are disconnected. These functions have to be
relearned after the battery terminals are con­
nected again. To prevent th is, the battery should
only be disco nnected from the vehicle e lectr ica l
system when abso lutely necessary for repairs.
Vehicles not driven for long periods
If you do not drive your vehicle over a period of
several days or weeks, electrical components are
gradually cut back or sw itched off. This reduces
energy consumption and maintains starting ca ­
pability over a longer period¢
page 173.
Some of the conven ience functions may not oper­
ate, such as the interior lights or the power seat
adjustment. The convenience functions will be
available again when you turn on the ignition and
start the engine.
Winter operation
During the winter months, battery capacity tends
to decrease as temperatures drop . T his is be-
Checking and Filling
cause more power is also consumed while start­
ing, and the headlights, rear window defogger,
etc., are used more often.
Avo id unnecessary power consumption, particu­
larly in city traff ic or when traveling only short
distances . Let your authorized Audi dealer check
the capacity of the vehicle battery before winter
sets in ¢
page 205. A well charged battery will
not only prevent starting problems when the
weather is cold, but will also last longer .
(D Tips
If your vehicle is left standing for several
weeks at extremely low temperatures, the ve­
hicle battery should be removed and stored
where it w ill not freeze. This will prevent it
from be ing damaged and having to be re­
placed.
Working on the battery
Be especially careful when working on or near
the battery.
The battery is located in the luggage compart­
ment under the floo r. Before you check anything
in the luggage compartment,
read and heed all
WARNINGS ¢
LD.·
Always heed the safety warnings, when working
on the vehicle battery or the veh icle electrical
system to prevent injury.
The following WARNINGS are very important
when working on the battery:
Always heed the following WARNING SYM·
BOLS and safety precautions when working on
the battery.
®
Always wear eye protection.
A
Battery acid contains sulfuric acid. Al·
ways wear gloves and eye protection .
@
No
- sparks
· flames
· smoking.
203

Checking and Filling
A
When a battery is charged, it produces hydrogen gas which is explosive and
could cause personal injury.
®
Always keep the battery well out of reach
of children.
A WARNING
Whenever working on the battery or on the
electrical system, there is the risk of injury ,
accident and even fire. Read and heed the fol­
lowing WARNINGS:
- Always wear eye protection. Do not let bat ­
tery acid or any lead particles get on your
skin or clothing. Shield your eyes. Explosive gases can cause blindness or other injury.
- Battery acid contains sulfuric acid. Sulfuric acid can cause blindness and severe burns.
- Always wear gloves and eye protection . Do
not tilt the battery because acid could leak
out of the ventilation openings.
- 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
lnJUry.
- 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
204
-
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 .
- 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 switched on or when the en­
gine is running, otherwise, you will damage
electronic components in the electrical sys­
tem .
- 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 .

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Battery charging
Starting the engine requires a well charged bat­tery .
Fig. 1 76 Engine co mpartment: Co nnectors for charger and
j u mpe r cab les
A lways read and h eed all WARNINGS be low
¢ &. and
¢&. in Working on the battery on
page 204 .
•Turnoff the ignition and all electr ica l consum­
ers .
• Make sure the area is well vent ilated when you
charge the battery .
• Open the engi ne hood ~
page 193.
• Open the cover on the posit ive pole ¢ fig . 176.
• Connec t the charger connecto rs accord ing to
the instructions to the
jump start bolts . (Bolts
under the cover= "positive", Bo lts with hex
head = "negat ive").
• Only now plug the mains lead for the charging
equipment into the wall outlet and turn it on
c> &, .
• Make sure the charging rate is not ov er
30 amps /14 .8 Volt .
• When the ba tte ry is fu lly charged : Tur n the
charg ing equipmen t off and remove the mains
l ead from the wall outlet.
• Now remove the clamps fo r the cha rging equ ip-
ment.
• Close the cover on the posit ive pole.
• Close the hood ¢
page 193 .
A discharged battery can freeze at temperatures
of only 32 °F (0 °C). A llow a frozen battery to
thaw comp lete ly before attempting to charge it
¢
& . However , we recommend not us ing a
thawed battery again because the battery cas ing
Checking and Filling
can be cracked due to ice forma tion and can leak
battery acid.
Battery charging (Maximum charging rate of
30 amps /14.8 Volt)
When charging at low voltages (e .g . with a trick­
le charger ),
the battery cables do not have to be
disconnected f irst . T he battery caps should
not
be opened when charging a battery .
It is not necessary to remove the battery from
the luggage compartment .
Fast charging the battery (charging rate
above 14 .8 Volts)
F or techn ical reasons do not use a battery cha rg­
er that uses vo ltage greater than 14.8 Vo lts to
charge your vehicle 's battery .
_8 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 froze n battery . It may ex ­
p lode 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 charger cables while
the charge r is operating .
- Fast charg ing a battery is dange rous and
should only be attempted by a competent
technician w ith the proper equipment.
- Battery acid that may spill during charging
should be washed off w ith a so lution of
warm wa ter and baking soda to neutra lize
the acid .
205

Check ing and F illing
CJ) Note
Never use a fast charger as a booster to start
the engine . This will serio us ly damage sensi­
tive electronic components, such as control
un its, relays, radio, etc., as well as the battery
charger .
Battery replacement
The new ba ttery mu st have the same specifica­
tions and dimensions as the original equipmen t
battery .
Intelligent energy management in your vehicle is
responsible for dist ributing the electrical energy
throughout your vehicle¢
page 173. The inte lli­
gent ene rgy ma nagement system wi ll keep the
eng ine batte ry charged better the n ve hicles w ith­
ou t th is system . To make su re the addit io nal
e lec trica l energy is avail ab le on ce again after you
h a ve changed the battery, we recommend t hat
you insta ll batteries o f the same type an d manu­
facture on ly (t he same as those insta lled at the
time your veh icle was delive red). Spec ificat ions
are listed on the battery housing. Your author­
ized Audi dealer must code the battery in the en­
ergy management system to enab le you to use
the energy manageme nt functions correctly after
replacing the battery .
If it is not possible to use a battery of th is type,
the new battery must have the same capacity ,
voltage (12-volts) , ampe rage, construct ion and
p lug sealing.
When insta lling the battery, make sure the igni­
tion and all electrical consumers are tur ned off .
@ Note
Make sure the ventilation hose on the side of
the batte ry is connected, othe rw ise fumes or
battery acid can lea k out.
@ For the sake of the environment
Because of the prob lem of proper disposal of
a battery, we recommend your author ized
Audi dea le r change the battery fo r you. Bat­
t er ies con ta in su lf ur ic ac id a nd lead a nd must
always be disposed of prop erly i n comp lianc e
206
with a ll environmenta l re gu lations . Disposing
of veh icle batteries im properly is very danger­
ous to t he environment.
Windshield/headlight*
washer container
Fig. 177 En gin e compar tment: Cove r on the w inds hield
a n d head lig ht* was he r flu id conta iner
The washer fluid co nta iner is marked with the
symbol
Q on its cap ~ fig. 177, ¢ page 195,
fig. 1 71.
M N
-N ,.:
"' m
.. Before you check anythi ng i n the engine com ­
partment,
always read and heed all WARN­
INGS ¢ .& in Working in the engine compart­
ment on page 193.
.. Lift the fi ller cap to ngue to add w ashe r fl uid .
You c an f ill the containe r to t he top .
.. Press the ca p back on to the filler neck a fte r fill -
ing the contai ner.
Yo u c an find the reservo ir
capacity in t he table in
~page 244.
Clean water should be used when filling up . If
possible, use soft wate r to preve nt scaling on the
w ashe r jets. Alw ays add a glass cleane r solu tion
(wi th fros t protection in the win ter) .
@ Note
Do n ot mix engi ne coolan t antifree ze or any
o the r ad ditive s t o fill u p the wi ndshi eld wash­
er reservo ir.

Emergency situations
Emergency situations
General
This chapter is intended for trained emergency crews and working personnel who have the nec­
essary tools and equipment to perform these
operations.
Starting by pushing or
towing
(D Note
Vehicles with an automatic transmission
cannot be started by pushing or towing.
Starting with jumper
cables
If necessary, the engine con be started by con­
necting it to the battery of another vehicle .
If the engine should fail to start because of a dis­
charged or weak battery, the battery can be con­
nected to the battery of
another vehicle, using a
pair of jumper cables to start the engine.
Jumper cables
Use only jumper cables of sufficiently largecross
section
to carry the starter current safely. Refer
to the manufacturer's specifications.
Use only jumper cables with
insulated terminal
clamps which are distinctly marked :
plus(+) cable in most cases colored red
minus(-) cable
in most cases colored black .
A WARNING
Batteries contain electricity, acid, and gas.
Any of these can cause very serious or fatal in­
jury. Follow the instructions below for
safe
handling of your vehicle's battery .
-Always shield your eyes and avoid leaning
over the battery whenever possible.
-A dead battery can freeze at temperatures
around 32 °F (0 °C) . If the vehicle battery is
frozen, you must thaw it before connecting
the jump start cables.
If you do not, this in-
238
creases the risk of an explosion and chemi­
cal burns. After jump starting the vehicle,
drive to an authorized Audi dealer or author­
ized Audi Service Facility immediately to
have the vehicle battery checked.
- Do not allow battery acid to contact eyes or
skin . Flush any contacted area with water
immediately.
- Improper use of a booster battery to start a
vehicle may cause an explosion .
- Vehicle batteries generate explosive gases.
Keep sparks, flame and lighted cigarettes
away from batteries.
- Do not try to jump start any vehicle with a
low acid level in the battery .
- The voltage of the booster battery must also
have a 12 -Volt rating . The capacity (Ah) of
the booster battery should not be lower
than that of the discharged battery. Use of
batteries of different voltage or substantial­
ly different "Ah" rating may cause an explo­
sion and personal injury.
- Never charge a frozen battery. Gas trapped
in the ice may cause an explosion.
- Never charge or use a battery that has been
frozen . The battery case may have be weak­
ened.
- Use of batteries of different voltage or sub­
stantially different capacity (Ah) rating may
cause an explosion and injury. The capacity (Ah) of the booster battery should not be
lower than that of the discharged battery.
- Before you check anything in the engine
compartment, always read and heed all
WARNINGS
r=> poge 193.
([) Note
-Applying a higher voltage booster battery
will cause expensive damage to sensitive electronic components, such as control
units, relays, radio, etc.
- There must be no electrical contact between
the vehicles as otherwise current could al­
ready start to flow as soon as the positive
(+) terminals are connected .

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
i=> page 193.
(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. 197. 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.
240
-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 240 and c> page 241 .
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
Do not install the front towing loop until it is
needed.
Fig. 198 Front bumper: removing the cover cap
Fig. 199 Front bumper : sc rew ing in t he towing loop
The towing loop fits into the threaded hole locat­
ed on the right side o f the front bumper and cov­
ered by a small cover when not in use .
.,. Remove the towing loop from the vehicle tool­
ki t
c> page 227 .
.,. Press the cover in by applying short strong
pressure to the bottom part to release it from
the bumper
c> fig . 198 . Ill>

Emergency situations
Raising the vehicle
Lifting with workshop hoist and with floor
jack
Th e vehicle may only b e lift ed at the lifting
poin ts illust rated.
F ig .. 203 F ro nt lift ing po int
F ig. 204 Rea r lifti ng po int
.,. Read and heed WARNING ¢ A-
.,. Locate lifti ng po ints ¢ fig . 203 and ¢ fig. 204 .
.,. Adjust lifting arms of wo rkshop hoist or floor
jack to match veh icle lifting points.
.,. In se rt a rubb er pad between t he floor jack/
wor kshop hoist a nd the lif ting poin ts .
If you must lift your vehicle with a floor jack to
work underneath, be sure the vehicle is safely
supported on stands intended for this purpose .
Front lifting point
The lift ing po int is located on the floo r pan re in­
forcement about at the same leve l as the jack
mo unt ing point ¢
fig. 203 . Do not lift the vehi­
cle at the vertical sill rei nforcement.
Rear lifting point
The lift ing po int is located on the vertica l re in­
for cement of the lower sill fo r the on board jack
¢fig. 204.
242
Lifting with vehicle jack
Refer to ~ page 231.
A WARNING
- To re duce the r is k of serious injury and vehi ­
cle dama ge .
- Always lift the vehicle o nly at the special
workshop hois t an d floor jack lift points il ­
l ustrat ed
~ fig. 203 and ~ fig. 2 04 .
-Failure to lift the v ehicle at these points
could ca use the veh icle to tilt or fall from
a lift if the re is a cha ng e i n ve hicle weigh t
dis tribu tion and ba lan ce . T his mig ht hap­
p en, for examp le, whe n he avy co mpo ­
n en ts such as the engine block o r tr an s­
mission are removed.
- W hen re m ov in g h eavy com ponen ts like
these, an cho r veh icle to hoist or ad d co rre ­
spond ing weights to ma inta in the ce nter of
gravity . Othe rw ise, the vehicle mi ght t ilt o r
slip off t he hoist, causing serious pe rsonal
in jur y.
(D Note
- Be aware of the fo llowing po ints befo re lift ­
ing the vehicle:
- The vehicle should never be lifted or
jacked up from underneath the engine oil pan, the transmission housing, the front
or rear axle or the body side members .
This could lead to serious damage .
- To avoid damage to the underbody or
chassis frame, a rubber pad must be in­
serted between the floor jack and the lift
points.
- Before driving over a workshop hoist,
check that the vehicle weight does not
exceed the permissible lifting capacity of
the hoist.
- Before driving over a workshop hoist , en­
sure that there is sufficient clearance be­
tween the hoist and low parts of the ve­
h icle .

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today's automobiles, have steadily reduced the
scope of maintenance and repairs which can be
carried out by veh icle owners.
Also , sa fet y a nd
en vironmental
concerns place very strict limits
on the nature of repairs and adjustments to en­
g ine and transm ission parts wh ich an owner can
pe rform .
Maintenance, adjustments and repairs usually re­
qu ire special tools, test ing devices and other
equ ipment available to specially trained work ­
shop perso nnel i n order to assure proper per­
formance, re liability a nd safety of the ve hicle and
its many systems.
Improper maintenance, adjustments and repairs
can impair the operation and re liab il ity of you r
vehi cle and eve n void your vehicle warra nty .
Therefo re, proof of se rvicing in accordance with
the m aintenance schedule may be a condition fo r
upho ld ing a possib le warranty claim made wi thin
the warranty period.
Above all , ope rational safety can be adversely af­
fected, cre ati ng u nnecessa ry risks fo r yo u and
your passengers.
I f in doubt about any se rvicing, have it done by
your author ized Audi dealer or any properly
eq uipped and qua lified workshop. We strongly
urge you to g ive your author ized Audi dealer the
opportunity to perform a ll scheduled mainte ­
nance and necessary repairs. Your dealer has the
fac ilities, original parts and tra ined specialists to
keep your veh icle running properly .
Performing limited ma intenance yourself
The fo llow ing pages describe a limited number of
procedures which can be performed on your vehi­
cle with o rdinary tools, should the need arise and
tra ined personnel be unavailable. Before per­
forming any of these procedures, always thor­
ough ly read a ll of the app licab le text and careful­
l y follow the instructions g iven . Always rigorously
observe the
WARNINGS prov ided .
Before you check an ything in the eng ine com ­
partment, alw ays read and heed all WARNINGS
c::> .&. and c::> .&. in Working in the engine compart­
ment on page 193 . Con
sumer inf ormation
A WARNING
- Ser ious personal in jury may occur as a result
of improperly performed maintenance, ad ­
justments or repairs .
- Always be extremely careful when work ing
on the vehicle. Always follow commonly ac­
cepted safety practices and general com­ mon sense. Never risk pe rsonal in jury.
- Do not attempt any of the maintenance,
checks or repairs described on the following pages if you are not fu lly familiar wi th these
or other proce dures with respect to t he ve­
h icle, o r are uncerta in how to pro ceed.
- Do not do a ny work withou t the proper tools
a nd equ ipment. Have the nece ssary wo rk
done by your authorized Audi dealer or any
p roper ly equipped and qualifie d wo rkshop.
- T he engine compa rtment of any motor veh i­
cle is a potent ially hazardous area . Never
reach into the area around or touc h the radi­
ator fan. It is temperature controlled and
can switch on suddenly - even when the en­
g ine is off and the ignition key has been re­
moved . The rad iator fan switches on auto ­
mat ically when the coo lant reaches a certain
temperature and will con tinue to ru n until
the coolant temperat ure drops.
- Always remove the igni tion key befo re any­
one gets under the vehicle.
- Always support your veh icle with safety
stands if it is necessary to work underneat h
the vehicle . The jack supplied with the veh i­
cle is no t adequ ate for t his pu rpose and
could collapse c ausing se riou s personal in­
jury .
- If you mu st wor k unde rne ath t he vehicle
with the wheels on the ground, always make
sure the vehicle is on level ground, that the
wheels a re always sec urely blocked and that
the engine cannot be started.
- Always make sure the transmission se lector
lever (a utomatic t ransmiss ion) is in "P"
(Park position) and the park brake is firmly
applied.
247