2017 AUDI A5 CABRIOLET check engine

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Driving
Steering
Manually adjustable steering wheel
The steering wheel position is fully adjus table up
and down and forward and back .
Fig. 86 Lever under the ste ering column
Fi rst, ad just t he driver 's sea t correct ly.
• Pull the lever ¢
fig. 86 ¢ .&, .
• Move the steer ing whee l to the desired posi­
t ion.
• Push the lever against the steeri ng column un-
ti l it locks .
There must be a t least 10 inches (25 cm) be­
tween your chest and the center of the stee rin g
wheel. If yo u cannot sit mo re than 10 inches (25
cm) from the steering wheel, see if adaptive
equipment is available to help you reach the ped­
als and increase the distance from the steering
wheel.
F or detai led information on how to adjust the
driver's seat, see
¢ page 58 .
.&_ WARNING
Improper use of steering whee l adjustment
and improper seating position can cause ser i­
ous pe rsonal injury.
- Adjust the steer ing whee l co lumn on ly w hen
the vehicle is not mov ing to prevent loss of
vehicle control.
- Adjust the driver's seat or steering wheel so
that there is a min imum of 10 inches (25
cm) betwee n your chest and t he s teer ing
wheel
¢page 112, fig. 128 . If you ca nnot
-
D rivi ng
maintain t his minimum distance, the airbag
system cannot p rotect yo u proper ly.
- If physical limitations prevent you from sit­
ting 10 inches (25 cm) or more from the
steer ing whee l, check with your author ized
Audi dealer to see if adaptive equipment is
ava ilable.
- If the steer ing whee l is aligned w ith your
face, the supplementa l driver's a irbag can­
not provide as much protect io n in an acc i­
dent. Always make sure that the steer ing
wheel is aligned with you r chest.
- Always hold the steering wheel with your
hands at the 9 o'clock and 3 o' clock posi­
tions to reduce the risk of pe rso nal inju ry if
the dr iver's a irbag dep loys .
- Never ho ld the stee ring wheel at the 12
o'cl ock position or wi th you r hands inside
the stee rin g wheel rim or on t he s teer ing
wheel h ub. Holding the stee ring w heel the
wrong way can cause serious inj uries to the
hands, arms and head if the driver's airbag
deploys .
Ignition lock
Starting engine with the key
Applies to: vehicles with ignition lock
The ignition is switched on and the engine start·
ed with the ignition key .
Fig . 87 Ig nition key
Starting the engine
• Insert the key into the ignition lock .
• Step on the brake pedal and move the sele ctor
lever to the P or N position .
• Press the key ¢
fig. 87 -the engine will start.
71

Automatic transmission
This prevents too much stress from being placed
on the locking mechanism.
Vehicles with multitronic transmission: Your ve­ hicle is equipped with
hill hold assist allowing
you to start while on an incline. The system is ac­
tivated when the brake pedal is pressed down
and held
for a few seconds. The brake pressure
will hold for
a moment after the brake pedal
loosens to prevent the vehicle from rolling back­
wards while starting up.
A WARNING
- The vehicle can also roll when the engine is
stopped.
- Unintended vehicle movement can cause se­ rious injury.
- Never leave your vehicle with the engine
running while in gear. If you must leave
your vehicle when the engine is running, ac­ tivate the parking brake and move the selec­
tor lever to P.
- Power is still transmitted to the wheels
when the engine is running at idle. To pre­
vent the vehicle from "creeping", you must
keep your foot on the brake when the en­
gine is running and the selector lever is in 0/
Sor R or "tiptronic" mode is selected.
- Do not press the accelerator pedal when changing the selector lever position while
the vehicle is stationary and the engine is
running.
- Never shift into R or P while driving.
- Before driving down a steep slope, reduce
your speed and shift into a lower gear with
"tiptronic".
- Do not ride the brakes or press the brake
pedal too often or too long when driving
down a hill. Constant braking causes the
brakes to overheat and substantially re­
duces braking performance, increases brak­
ing distance or causes complete failure of
the brake system.
- To prevent the vehicle from rolling back
when stopping on inclines, always hold it in
place with the brake pedal or parking brake.
- Never hold the vehicle on an incline with a
slipping clutch. The clutch opens automati-
84
cally when it becomes too hot from the
overload. An indicator lamo
[O ] illuminates
and a driver message appears
c::;, page 86
when the clutch is overloaded.
- If the engine must remain running, never
have any driving position engaged when
checking under the hood. Make sure these­
lector lever has securely engaged and is
locked in P with the parking brake set
¢page 193. Otherwise, any increase in en­
gine speed may
set the vehicle in motion,
even with the parking brake applied.
(D Note
- S tronic- and tiptronic transmission: When
stopping on an incline, do not try to hold
the vehicle in place by pressing the accelera­
tor pedal while a driving gear is selected.
This can cause the transmission to overheat
and can damage it. Activate the parking
brake or press the brake pedal to prevent
the vehicle from rolling.
- S tronic- and tiptronic transmission: Allow­
ing th@ vehicle to roll when th@ engine is
stopped and the selector lever is in N will
damage the transmission because it is not
lubricated under those circumstances.
(D Tips
For safety reasons, the parking brake is re­
leased automatically only when the driver's
safety belt is engaged in the buckle.
· Hill descent control
App lies to: vehicles with mult itron ic/S tron ic/t iptronic
The hill descent control system assists the driver
when driving down declines .
Hill descent control is activated when the selec­
tor lever is in D/S and you press the brake pedal.
The transmission automatically selects a gear
that is suitable for the incline. Hill descent con­
trol tries to maintain the speed achieved at the
time of braking, within physical and technical
limitations. It may still be necessary to adjust the
speed with the brakes. ..,..

Intelligent Technology
These electronic control modules record data
dur ing normal vehicle operation that may be
needed by trained technicians for diagnostic and
repair purposes. The recording capability of these
modules is l imited to data (no sound is record­
ed). Only a small amount of data is actually re ­
corded over a very limited per iod of time, or stor­
ed when a system fau lt is detected by a control
mod ule. Some of the data stored may re late to
ve hicl e speed, dire ct ion, or brak ing, as well as re­
stra int system use and performance in the event
of a crash. Stored data can also only be read and
downloaded with special equipment that is di­ rectly connected to the veh icle.
@ Tips
Your vehicle may be equipped with Audi con­
nect. Your use of certain Audi connect fea­
tures requires wireless services that are pro­
vided by a third party wire less te lecommuni­
cations provider. For detai ls regarding how in­
formation obtained through Audi connect is collected, processed, t ransmitted, used, and
shared, please see your contract with the
w ireless te lecommunica tions p rovider and the
"About Aud i connec t" tab in your vehi cle's
M M I:
!MENUI b utton> Audi connect > About
Audi conne ct.
Braking
What affects broking efficiency?
New brake pads
During the fi rs t 250 miles (400 km), new b rake
pads do not possess the ir full braking effect, they
have to be "broken in" first ¢.& . You can com­
pensate for this s light ly reduced bra king power
by pushing harde r on the brake pedal. Avoid
heavy braking loads during the break-in period .
Operating conditions and driving habits
The brakes on today's automobiles a re st ill s ub­
ject to wea r, depending la rgely on ope rating con ­
ditions and driving habits¢.&, . On vehicles that
are either dr iven most ly in stop-and-go city traf ­
f ic or are driven hard, the brake pads should be
checked by your authorized Aud i dea ler more of­
ten than specified in the
War ranty & Mainte-
170
nance booklet . Failure to have your brake pads
inspected can result in reduced brake perform ­
ance.
On steep slopes, you should use the bra king ef ­
fect o f the engine. This way, you prevent unnec­
essary wear on the brake system. If you must use
your brakes, do not ho ld the brakes down contin ­
uously. Pump the brakes at intervals.
Ope rating nois e
Noises may occu r when braking depen ding on the
speed, braking force and outside conditions such
as temperature and h umidity.
Effect of water and road salt
In certain si tuations, for examp le after d riving
t hr ough water, in heavy rain, after over nigh t con­
densa tion or after washing your car, the brak ing
effect can be reduced by moisture or ice on the
brake rotors and brake pads . The brakes must be
dried f irst with a few careful brake app lications.
At higher speeds and w ith the windshield wipe rs
turned on, the brake pads press against the brake rotors for a short amount of time . This occurs at
regu lar intervals without the dr iver not icing and
provides for better brake response t ime under
wet cond itions .
The effectiveness of the brakes can be reduced
when the vehicle is driven on a salt-covered road
and the brakes are not used. Likewise, you clean
off accumulated salt coating from brake discs
and pads with a few caut ious applications of the
brake ¢.& .
Corrosion
There may be a tendency for dirt to build up on
the brake pads and corrosion to form on the discs
i f the car is not driven regularly or only for short
trips with little use of the brakes .
If the brakes are not used frequently, or if corro ­
s io n has formed on the discs, it is advisable to
clean off the pads and discs by braking firmly a
few times from a moderately high speed ¢ .& .

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Fa ults in the brake system
If yo u should notice a sudden increase i n brake
pedal travel, then one of the two brake circuits
may have failed
¢ .&. .
Low brake fluid level
Malf unct ions can occur in the bra ke system if the
b rake fl uid leve l is too low. The brake fluid level
i s monitored e lectronica lly .
Bra ke booste r
The brake booster increases the pressure that
you generate with the brake pedal.
It works on ly
when the engine is run ning
.¢ .&.
Bra ke lining we ar status
Brake lining wear may be checked by visual in­
spection of the condition of the brake pads
through the open ings in the wheel. If necessary,
the wheel may be removed for this inspection
¢ page 228, Replacing wheels.
A WARNING
- New bra ke pads don't have the best stop­
ping power and must be "bro ken- in" dur ing
the init ia l 250 m iles (400 kilometers). Yo u
can compensate for th is by press ing the
brake pedal more firmly. This a lso applies
later when new pads are installed.
- Yo u should perfo rm braking maneuvers for
the p urpose of clean ing the brake system
only if road conditions permit. Other road
users must not be put at risk -you may
cause an accident!
- Before descending a steep grade, reduce
speed and shift t ransm iss ion into a lower
gear or lowe r driving range. Do not ride the
brakes or hold the pedal down too long or
too often. This could ca use the brakes to get
hot and diminish brak ing efficie ncy.
- Do not "r ide t he b rakes" by resting your foot
on the pe dal when yo u do not inten d to
bra ke. This may cause the bra kes to over­
heat, premat ure wear and increased stop ­
ping distance.
- Under certa in climatic and operating condi­
tio ns such as passing thro ugh water, driving
in heavy rain or after washing the vehicle,
Intellig ent Technology
the effectiveness o f the brakes can be re­
duced. In winter, ice can accum ulate on the
brake pads, lin ings, d iscs and drums . Care­
fu lly apply brakes for a test . Brakes will dry
and ice coat ings will be cleaned off after a
few ca refu l brake applications .
- Driving for an extended period of t ime on
salt-covered roads without usi ng your
b rakes can also affect braking eff iciency.
Clea n off acc umul ated salt coat ing from
b rake discs an d pa ds w ith a few careful
b rake appli cat ions .
- I f you d amage the front spoile r, or if you in­
s t all a different spoiler, be s ure the a ir flow
to the front brakes is not obstruc ted. Other­
wise the brake system could overheat reduc­ ing the effectiveness of t he ent ire bra ke sys­
tem.
- Fai lure of one brake circuit w ill impa ir the
braking capability resulting in an increased
stopping distance . Avoid driving the vehicle
and have it towed to the nearest authorized
Aud i dealer or qualified workshop.
- Never let the vehicle roll to a stop with the
engine shut off.
- If the brake booster is not working, the
brake pedal must be pressed cons iderab ly
ha rder to make up fo r the lack of booste r
assis tance .
Electro-mechanical
power assist, dynamic
steering
The electro-mechanical power assist helps the
driver when steering.
Power steer ing adapts electronically based on
the vehicle speed.
Indicator lights and messages
• Steering defe ctive! Do not drive vehicle!
If this indicato r light turns on and stays on and
t hi s message appears, the powe r steering may
have failed.
171

Driving and th e en vironm ent
(D Tips
- Check the depth of the water before driving
through it .
- Do not stop the veh icle, drive in reverse or
switch the engine
off when driving through
water.
- Keep in mind that oncoming vehicles may
create waves that raise the water level and
make it too deep for your veh icle to drive
through safely.
- Avoid driving through salt water because it
can cause corrosion.
Catalytic converter
It is very important that your emission control
system (catalytic converter) is functioning prop­ erly to ensure that your vehicle is running in an
environmentally sound manner .
~ Always use lead-free gasoline ¢ page 188,
Fuel supply .
~ Never run the tank down a ll the way to empty .
~ Never put too much motor oil in your engine
¢ page 19 7, 9::?l Adding engine oil .
~ Never try to push- or tow-start you r vehicle.
The cata lytic converter is an efficient "clean-up"
dev ice bu ilt into the exha ust system of the vehi­
cle. The cata lytic conve rter burns many of the
pollutants in the exhaust gas before they are re ­
leased into the atmosphere.
The exclusive use of unleaded fue l is critica lly im­
portant for the l ife of the catalytic conve rter and
p roper functioning of the engine.
A WARNING ,..____ -
- The temperature of 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 ope rate t he vehicle in areas
where the hot exha ust system may come in
contact with dry grass, br ush, fue l spill or
other mater ial which can cause a fire.
- Do not apply additional undercoating or
rustproofing on or near the exhaust mani-
176
fold, exha ust pipes, cata lytic conve rter or
heat shields. D uring driving, the substance
used for undercoat ing could overheat and
cause a f ire.
Cl) Note
- Be aware that just one tank f illing wit h
leaded fu e l w ill already seriously degrade
the performance of the catalytic converter.
- Do not exceed the correct engine oil leve l
¢page 197.
-Do not drive until the fue l tank becomes
completely empty. The engine could mis­
fire. Unbu rned fue l cou ld also get into the
exhaust system and this could cause the
catalytic converter to overheat.
- Do not turn off the ign ition while the vehicle
is moving .
- Do not continue to operate your vehicle un­
der these conditions, as otherw ise fuel can
reac h the catalytic converter. T his could re­
sult in overheat ing of the converter, requir­
ing its replacement.
- T o ass ure eff icient operat ion of the Emis­
sion Contro l System:
- Have you r vehicle maintained properly and
i n accordance wit h the service recommen­
dations in your Warranty
& Ma intenance
booklet.
- Lack of proper ma intenance as well as im­
p roper use of the veh icle will impa ir the
function of the emission control system
and could lead to damage.
(® For the sake of the environment
Even when the Emiss ion Control System is op­
erating properly, t he exhaust gas can have a
sulfur-like exhaust gas smell under some op­
erating states. Th is depends on the sulfur
content of the fuel being used. Us ing a d iffer­
ent brand of fuel may help, or fi lli ng the tank
wi th lead-free super g rade gasoline.
Shutting down vehicle
If you wo uld like yo ur vehicle to remain inopera­
tive for a longer pe riod of time, con tact an Audi
o r other spec ia liz ed dealer. They can adv ise you ..,.

Trailer towing Driving with a trailer
General information
Your Audi was designed primarily for passenger
transportation .
If you plan to tow a trailer, please remember that
the additional load will affect durability, econo­
my and performance.
Trailer towing not only places more stress on the
vehicle, it also calls for more concentration from
the driver.
For this reason, always follow the operating and
driving instructions provided and use common
sense.
Technical requirements
Trailer hitch
Use a weight-carrying hitch conforming to the
gross trailer weight. The hitch must be suitable
for your vehicle and trailer and must be mounted
securely on the vehicle's chassis at a technically
sound
location . Use only a trailer hitch with a re­
movable ball mount . Always check with the trail­
er hitch manufacturer to make sure that you are
using the correct hitch.
Do not use a bumper hitch.
The hitch must be installed in such a way that it
does not interfere with the impact -absorbing
bumper system . No modifications should be
made to the vehicle exhaust and brake systems .
From time to time, check that all hitch mounting
bo lts remain securely fastened.
When you are not towing a trailer,
remove the
tra iler hitch ball mount . This prevents the hitch
from causing damage shou ld your vehicle be
struck from beh ind ¢
,&. .
Trailer brakes
If your trailer is equipped with a braking system,
gi check to be sure that it conforms to all regula-......
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Trailer towing
The trailer hydraulic brake system must not be
directly connected to the vehicle's hydraulic
brake system ¢.&. .
Safety chains
Always use safety chains between your vehicle
and the trailer.
Trailer lights
T ra iler lights must meet all regulations . Be sure
to check w ith your author ized Audi dealer for cor­
rect wiring, switches, and relays.
Mirrors
If you are unable to see the traffic behind you us­
ing the regular outside mirrors, then you
must in­
stall extended mirrors. It is important that you
always have clear vision to the rear.
,8. WARNING
-If a tra iler has electr ical brakes please note
that these bra kes are not activated by the
factory-fitted control unit -risk of accident!
- After removing the trailer hitch, do not
store it in your vehicle. In case of sudden
braking, the hitch could fly forward and in­
jure you or your passengers.
Operating instructions
Maximum trailer weight
A trailer for your vehicle is limited to a typical
class 1 or class 2 trailer.
Trailer load distribution
Be sure the load in the trailer is held sec ure ly in
place to prevent it from shifting forward, back­
ward or sideways.
Never allow a passenger to ride in a trailer¢.&.
in Driving instructions on page 180.
Engine cooling system
Towing a trailer makes the engine work harder . It
is important that the cooling system's perform ­
ance is up to the additional load . Make sure that
the cool ing system has enough fluid. .,..
179

Trailer towing
Tire pr essure
When tow ing a tra iler, inflate the tires of yo ur
veh icle to the tire pressure listed under " Fu ll
load" on the label ¢
page 217. Inflate trai ler
tires to trai ler and tire manufacturers' specifica­
tions.
Lights
The headlight settings should be chec ked with
the trailer attached before driving off . Check to
make sure both vehicle and trailer lights are
working properly.
Safety chains
Be s ure t railer safety chains are properly connect­
ed from the trailer to the hitch on the vehicle .
L eave enough slack in the chains to permit turn ­
ing corners. When you install safety chains, make
sure they wi ll not drag on the road when you are
driving.
The chains shou ld cross under the trailer tongue
to prevent it from dropping in case of separation
from the hitch.
Driving instructions
Driving with a trailer always requires extra care
and consideration .
Weight distribution
Towing a loaded trailer with an empty car res ults
in a high ly unstable distribution of weight . If this
cannot be avo ided, drive at very low speeds on ly
to avoid the risk of losing steering control.
A "balanced" rig is easie r to operate and cont rol.
This means that the tow vehicle should be loaded
to the extent possible and permissible, while keeping the trai ler as light as possib le under the
circumstances . Whenever possible, transfer
some cargo to the luggage compartment of the
tow vehicle while observ ing tongue load requ ire­
ments and vehicle loading considerat ions .
Spe ed
The higher the speed, the more difficult it be­
comes for the driver to contro l the rig. Do not
drive at the maximum permiss ible speed. Reduce
your speed even more if load, weather or w ind
180
conditions are unfavorab le -particularly when
going downhi ll.
Reduce vehicle speed
immediate ly if the trailer
shows the slightest sign of sway ing.
Do not try
to st op the swaying by accele rating.
Observe speed limits. In some a reas, speeds fo r
vehicles towing tra ilers are lower tha n for regular
vehicles.
A lways apply brakes ear ly . When driving down­
hill, shift into a lower gea r to use the engine
braki ng effect to slow the vehicle. Use of the
brakes alone ca n cause them to overheat and fa il.
Coolant temperature
The coolant temperature gauge¢ page 8 must
be observed carefully. If the needle moves close
to the upper end of the scale, reduce speed im­
med iate ly and/or tu rn off the a ir cond itioner .
If the coolant temperatu re warning light . in
the instrument cluster starts flashing, p ull off
the road, stop and let the engine
idle for about
two minu tes to p revent heat build-up .
.&, WARNING
Anyone not properly res trained in a moving
vehicle is at a much greater risk in an acci ­
dent . Never let anyone ride in your car who is
not properly wear ing the restraints provided
by Aud i.
Trailer towing
information
Important to know
-
Your vehicle handles differently when towing a
trailer because of the addit iona l weight and dif­
ferent weight distribution. Safety, performance
and economy will greatly depend on how careful­
ly you load your tra iler and operate your rig.
Before you actually tow your trailer, pract ice
turning, stopping and backing up in an area away
from traffic. Keep pract icing u nti l you have be­
come completely fam iliar w ith the way your vehi-
cle-tra ile r combination behaves and respo nds . .,.

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Checking and Filling Hood
Releasing and opening the engine hood
The engine hood is released from inside the vehi­
cle.
Fig. 169 Driver's side footwell: engine hood re lea se lever
Fig. 170 Release lever under the engine hood
Before opening the engine hood, make sure that
the windshield wipers are flat against the wind­
shield. Otherwise, they could damage the paint
on the hood.
.. With the driver's door open, pull the lever un­
der the instrument panel in the direction of the
arrow
¢ fig. 169.
.. Raise the hood slightly¢&.
.. Press the rocker switch under the hood upward
¢
fig . 170. This releases the catch.
.. Open the hood.
A WARNING
Hot engine coolant can burn you.
- To reduce the risk of being burned, never
open the hood if you see or hear steam or
coolant escaping from the engine compart­
ment. Wait until no steam or coolant can be
Checking and Filling
seen or heard before carefully opening the
hood.
Closing the engine hood
.. Pull the hood down until the pressure from the
struts is reduced.
"' Le t the hood
drop down and latch in place. Do
not try to push it shut;
it may fail to engage
¢&, .
A WARNING
A hood that is not completely latched could
fly up and block your view while driving.
- When you close the engine hood, check it to
make sure the safety catch has properly en­
gaged. The hood should be flush with the
surrounding vehicle body parts.
- If you notice while driving that the hood is
not secured properly, stop at once and close
it.
Working in the engine compartment
Be especially careful whenever you work in the
engine compartment.
-
Whenever you must perform any work in the
engine compartment, for example checking and
filling different fluids, there is a risk of injury, burns and accidents. To prevent personal injury
always observe the following WARNINGS. The
engine compartment of any vehicle is a hazard­
ous area
¢ .&. .
A WARNING
-~
To help avoid injury, before you check any­
thing under the hood:
- Turn off the engine.
- Remove the ignition key .
- Apply the parking brake.
- Move selector lever of automatic transmis-
sion to "P" (Park).
-Always let the engine cool down. Hot com­
ponents will burn skin on contact.
- To reduce the risk of being burned, never
open the hood if you see or hear steam or
coolant escaping from the engine
193