2017 AUDI A5 CABRIOLET catalytic converter

Driver information system
If the light does not go out after the engine is
started, or illuminates whi le you are driving, a
malfunct ion may exist in the engine system. If
the light illuminates, the catalytic converter
could be damaged.
Continue driving
with reduced power (avoiding
sustained high speeds and/or rapid accelera­
tions) and have the condition corrected. Contact
your authorized Audi dealer.
If the light illuminates, the electronic speed lim­iter may a lso be malfunctioning. For more infor­
mation
c:> page 26, Electronic speed limiter.
An improperly closed fuel filler cap may also
cause the MIL light to illuminate
c:> page 190.
On-Board Diagnostics
Fig. 15 Loca tion of Data Li nk Connector (D LC)
On-Board Diagnostics monitors the components
of your emission control system. Each monitored
component in your engine system has been as­
signed a code . In case of a malfunction, the com­
ponent will be identif ied and the fau lt stored as a
code in the control module memory.
The MIL light may also illuminate if there is a
leak in the on-board fuel vapor recovery system .
If the light illuminates after a refueling, stop the
vehicle and make sure the fue l filler cap is prop­
erly closed
c:> page 190 .
In order to make an accurate diagnosis, the stor­
ed data can only be displayed using special diag­
nostic equipment (generic scan tool for OBD).
In order to connect the specia l diagnostic equip­
ment, push the plug into the Data Link Connector
(DLC). The DLC is located to the right of the hood
release
c:> fig. 15.
26
Your authorized Audi dea ler or qual ified work­
shop can interpret the code and perform the nec­
essary repair.
_& WARNING
Do not use the diagnostic connector for per­
sonal use. Incorrect usage can cause malfunc­
tions, which can increase the risk of a colli­
sion!
Electronic speed limiter
-
Your vehicle may be factory equ ipped w ith tires
that are rated fo r a maximum speed of 130 mph
(210 km/h). This is may be less than the maxi­
mum speed of your vehicle. To reduce the risk of
sudden tire failure and loss of control if the vehi­
cle is operated at excessive speeds , your vehicle
has an e lectronic speed limiter. The electronic
speed limiter prevents your vehicle from going
faster than the tire speed rating . For more infor­
mation
c:> page 207.
If the engine control unit receives faulty vehicle roadspeed signals, the Malfunction Indicator
Light (MIL)
II will illuminate. If this occurs, con­
tact the nearest authorized Audi dealer for ass is­
tance .
_& WARNING
Always observe the posted speed limits and
adjust your speed to suit prevailing road, traf­
fic and weather conditions. Never drive your
vehicle faster than the maximum speed rating
of the tires insta lled .
-

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 ..,.

Driving and th e en vironm ent
Regular maintenance
A badly tuned engine unnecessarily wastes a lot
of fuel.
.,. Have your vehicle serviced at regular intervals.
By having your vehicle regu larly serviced by an
author ized Audi dealer he lps to ensure that it
runs properly and econom ically . The condition of
your veh icle not only affects its safety and ability
to hold its value, it also affects
fu el consump­
tion .
C he ck your oil e ach t ime you fill you r ta nk .
The amount of oil used is re lated to engine load
and speed.
It is normal for the oil consumpt ion of a new en­
g ine to reach its lowest val ue afte r a certa in mile­
age has been driven .
You must d rive you r vehicle about 3 ,000 miles
(5,000 k ilome ters) before you can p roperly as ­
sess o il cons umption .
This a lso applies to fuel consumption and engine
outpu t.
(D Note
- Have your vehicle maintained properly and
in accordance with the service recommenda­
tions in you r Warranty
& Maintenance book ­
l et . La ck of p roper main tenance as well as
i mproper use of the vehicle will impa ir the
f u nct ion of the emission control system and
could lead to damage.
- Do not al ter or remove any component of
the Emission Control System unless ap­ proved by the manufacturer.
- Do not a lter or remove any device, such as
heat shie lds, switches, ignition wires,
valves, which are designed to protect your
vehicle's Emission Control System and other i mportant vehicle components.
178 ·
Fewer short trips
Fuel consumption will always be relatively high
on short trips .
.,. Try to avoid driving short distances with a cold
eng ine .
T he eng ine and catalytic converter have to reac h
their opt imal
operating temper atu re to reduce
fuel consumpt ion and noxious emiss ions effec­
tively .
Just after start ing, a cold engine in a mid-size car
on ly achieves a fuel economy of 6-8 miles per
gallon (30-40 l/100 km) . After about a half a
mile, fuel economy climbs to 12 mpg (20 l/100
km) . After about
2 .5 m iles (4 km), the engine is
at its proper operating temperatu re and fuel
economy has reached a no rma l level. So you can
see that you should avoid sho rt tr ips wheneve r
possible .
The
out sid e temperatur e is also cr it ica l in th is re­
gard. Your car cons umes more fue l in the winter
than in the summer.

Fuel and Refueling
Fuel and Refueling
Fuel
Fuel supply
Using the right fuel helps keep the environment
clean and prevents engine damage.
Fuel recommendation
The fuel recommended for your vehicle is unlead­
ed premium
grade gasoline. Audi recommends
using TOP TIER Detergent Gasoline with a mini­
mum octane rating of 91 AKI (95 RON). For more
information on TOP TIER Detergent Gasoline,
p lease go to the official website
(www.toptiergas.com).
The recommended gasoline octane rating for
your engine can also be found on a label located
on the ins ide of the fuel filler flap . This rating
may be specified as AKI or RON.
Your vehicle may also be operated using unlead­
ed regular gasoline with a minimum octane rat­
ing of 87 AKl/91 RON . However, using 87 AKI/91
RON octane fuel w ill slightly reduce engine per­
formance.
Use unleaded gasoline only. Unleaded gasoline
is available throughout the USA, Canada, and in
most European countries . We recommend that
you do not take your vehicle to areas or countries
where un leaded gaso line may not be available.
For more information on refueling your vehicle,
see
r::;, page 190.
Octane rating
Octane rating indicates a gasoline's ability to re­
sist engine damaging "knock" caused by prema­
ture ignit ion and detonation . Therefore, buy ing
the correct grade of gasoline is very important to
he lp prevent poss ible engine damage and a loss
of engine performance.
Gasoline most commonly used in the United
States and Canada has the following octane rat­
i n gs that can usually be found on the filler pump:
- Premium Grade: 91 - 96 AKI
- Regular Grade: 87 -90 AKI
188
Explanation of the abbreviations:
AKI= Anti Knock Index= (R+M)/2 = (RON +MON)/
2
RON = Research Octane Number
MON= Motor Octane Number.
CJ) Note
- Do not use any fue l with octane ratings low­
er than 87 AKI or 91 RON otherwise expen­
sive engine damage will occur.
- Do
not use leaded gasoline. The use of lead­
ed gasoline will severely damage your vehi­
cle's catalytic converter and its ability to
control exhaust emissions.
Blended gasoline
Use of gasoline containing alcohol or MTBE
(methyl tertiary butyl ether)
You may use unleaded gasoline blended with al­
cohol or MTBE (commonly referred to as oxygen­
ates) if the blended mixt ure meets the following
criteria:
Blend of gasoline methanol (wood alcohol or
methyl alcohol)
- Anti-knock index must be 87 AKI or higher.
- Blend must contain no more than 3% metha-
nol.
- Blend must contain more than 2% co-solvents.
Blend of gasoline and ethanol (grain alcohol or
ethyl alcohol)
-Anti-knoc k index must be 87 AK I or higher.
- Blend must not contain more than 15% etha-
nol.
- Vehicles with flexib le fue l eng ine: blend must
not contain more than 85% ethanol.
Blend of gasoline and MTBE
-Anti-knock index must be 87 AKI or higher.
- Blend must contain not more than 15% MTBE.
Seasonally adjusted gasoline
Many gasoline grades are blended to perform es­
pecially well for winter or summer dr iv ing . Dur-
i ng seasonal change-ove r, we suggest that you .,.

a:,
a:,
...... N r--. N ...... 0
0
LL 00
Automatic transmission . . . . . . . . . . . . . . . . . 81
Automatic Shift Lock (ASL) . . . . . . . . . . . . . 82
Driving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Emergency mode . . . . . . . . . . . . . . . . . . . . . 86
Emergency release . . . . . . . . . . . . . . . . . . . . 87
Kick -down . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Manua l shift program . . . . . . . . . . . . . . . . . 85
Removal lock (ignition key) . . . . . . . . . . . . . 71
Selector lever . . . . . . . . . . . . . . . . . . . . . . . . 81
Automatic wipers . . . . . . . . . . . . . . . . . . . . . . 53
Auto Safety Hotline . . . . . . . . . . . . . . . . . . . 118
Average speed . . . . . . . . . . . . . . . . . . . . . . . . 22
Avoid damaging the vehicle . . . . . . . . . . . . . 175
B
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Battery location inside the luggage compart-
ment ..............................
203
Charge level . . . . . . . . . . . . . . . . . . . . . . . . 173
Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
Energy management . . . . . . . . . . . . . . . . . 173
Important warnings when working on the
battery . . . . . . . . . . . . . . . . . . . . . . . . . . . .
203
Jump starting . . . . . . . . . . . . . . . . . . . . . . . 238
Replac ing the battery . . . . . . . . . . . . . . . . 206
Work ing on the battery . . . . . . . . . . . . . . . 203
Before driving . . . . . . . . . . . . . . . . . . . . . . . . 111
Belt positioner . . . . . . . . . . . . . . . . . . . . . . . 125
Belt tensioners . . . . . . . . . . . . . . . . . . . . . . . 128
Bio -ethanol (Fuel) . . . . . . . . . . . . . . . . . . . . . 189
Blended gasoline . . . . . . . . . . . . . . . . . . . . . 188
Blower (automatic climate control) . . . . . . . . 68
Booster seats . . . . . . . . . . . . . . . . . . . . . . . . 158
Brake fluid
Changing the brake fluid . . . . . . . . . . . . . .
202
Checking the brake fluid l evel . . . . . . . . . . 202
Brake system
Anti-lock brak ing system . . . . . . . . . . . . . . .
17
Brake fluid specifications for refill and re­
placement . . . . . . . . . . . . . . . . . . . . . . . . .
202
Brake light defective . . . . . . . . . . . . . . . . . . 19
Brake power assist unit . . . . . . . . . . . . . . . 170
Brakes. .. .. .. ............... .. ..... 170
Ceramic brakes . . . . . . . . . . . . . . . . . . . . . . 170
Electromechan ical parking brake . . . . . . . . 76
Warning/indicator lights . . . . . . . . . . . . . . . 13
Worn brake pads symbol . . . . . . . . . . . . . . . 18
Index
Braking
Brake assist . . . . . . . . . . . . . . . . . . . . . . . .
167
Emergency braking function . . . . . . . . . . . . 77
braking guard . . . . . . . . . . . . . . . . . . . . . . . . . 88
Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Break-in period
Brake pads .. .. .. .. ............. .. . .
Tires ..... .... .. .. ........ · · · · · · · · ·
Breaking in ... .. .. .. ............... . .
New tires
Bulbs
C
170
175
175
214
237
California Proposition 65 Warning . . . . . . . 194
Battery specific . . . . . . . . . . . . . . . . . . . . . 204
Capacities . . . . . . . . . . . . . . . . . . . . . . . . . . . 244
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . 195
Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
Cargo area
refer to Luggage compartment ...... 63, 116
Catalytic converter . . . . . . . . . . . . . . . . . . . . 176
Center armrest . . . . . . . . . . . . . . . . . . . . . . . . 60
C en tral locking . . . . . . . . . . . . . . . . . . . . . . . .
27
Central locking switch . . . . . . . . . . . . . . . . . 31
Convenience key . . . . . . . . . . . . . . . . . . . . . . 30
Remote control key . . . . . . . . . . . . . . . . . . . 30
Ceramic brake rotors
New brake pads . . . . . . . . . . . . . . . . . . . . .
170
Certification . . . . . . . . . . . . . . . . . . . . . . . . . 249
Changing engine oil . . . . . . . . . . . . . . . . . . . 198
Checking
Engin e coolant level. . . . . . . . . . . . . . . . . .
199
Child restraints
Danger of using child restraints in the front
seat.... .. .. .. .. .. ............. ....
131
Where can I get add itiona l information
about child restra ints and their use? . . . .
166
Child restraint system anchors . . . . . . . . . . 163
Child safety . . . . . . . . . . . . . . . . . . . . . . . . . . 150
Impo rtant safety instructions for using child
safety seats . . . . . . . . . . . . . . . . . . . . . . . .
153
Installing a c hild restraint using the LATCH
system . . . . . . . . . . . . . . . . . . . . . . . . . . . .
165
251

Index
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . 195
Adding . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
Addit ives . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
Changing . . . . . . . . . . . . . . . . . . . . . . . . . . 198
Check oil level . . . . . . . . . . . . . . . . . . . . . . 197
Consumption . . . . . . . . . . . . . . . . . . . . . . . 197
Indicator light . . . . . . . . . . . . . . . . . . . . 15, 18
Oi l consumption . . . . . . . . . . . . . . . . . . . . . 196
Pressure malfunction . . . . . . . . . . . . . . . . . 15
Sensor defective . . . . . . . . . . . . . . . . . . . . . . 18
Specification and viscosity . . . . . . . . . . . . . 195
Engine speed limitation . . . . . . . . . . . . . . . . . 18
Environment Catalytic converter . . . . . . . . . . . . . . . . . . . 176
Disposing of your vehicle battery . . . . . . . 206
Driving at high speeds . . . . . . . . . . . . . . . . 177
Fuel ...... .... ........... ........ . . 190
Leaks under your vehicle . . . . . . . . . . . . . . 193
L ett ing the veh icle stand and warm up . . . 177
Proper disposal of drained brake fluid . . . 202
Proper disposal of drained engine coolant 200
Proper disposal of drained engine oil 197, 198
Recycling used engine oil . . . . . . . . . . . . . 197
Unleaded fuel . . . . . . . . . . . . . . . . . . . . . . . 188
What should I do with an old battery? . . . 206
EPC
refer to Electronic power control . . . . . . . . 18
Ethyl alcohol (Fuel) . . . . . . . . . . . . . . . . . . . . 189
E vent Data Recorder (EDR) . . . . . . . . . . . . . 169
Expansion tank . . . . . . . . . . . . . . . . . . . . . . . 199
Exterior lighting . . . . . . . . . . . . . . . . . . . . . . . 48
Exterior mirrors Adjusting . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Dimming . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
He ating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
F
Fan
Radiator 201
Fa sten ing
Booster seats . . . . . . . . . . . . . . . . . . . . . . . 158
Convertible child safety seats . . . . . . . . . . 156
Infant seats . . . . . . . . . . . . . . . . . . . . . . . . 155
f lexible fuel . . . . . . . . . . . . . . . . . . . . . . . . . . 189
Floor mats . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Fog lights/rear fog light(s) . . . . . . . . . . . . . . 48
Folding the rear seats . . . . . . . . . . . . . . . . . . . 64
254
Foot pedals .......................... 116
For the sake of the environment Environmentally-friendly driving . . . . . . . 177
Gasoline fumes and the env ironment . . . . 190
Letting the engine warm up . . . . . . . . . 71 , 73
Refueling . . . . . . . . . . . . . . . . . . . . . . . . . . 190
Saving fuel by early upshifting . . . . . . . . . . . 9
Front airbags Description . . . . . . . . . . . . . . . . . . . . . . . . . 134
How they work . . . . . . . . . . . . . . . . . . . . . . 138
Frontal collisions and the laws of physics . . 123
Front passenger's door emergency locking . . 32
Front seats Adjust ing . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Child restraints in the front seat........ 131
Upper cabin heating . . . . . . . . . . . . . . . . . . . 69
Fuel Additives. . . . . . . . . . . . . . . . . . . . . . . . . . . 188
B lended gasol ine . . . . . . . . . . . . . . . . . . . . 188
Consumption . . . . . . . . . . . . . . . . . . . . . . . . 22
Fuel gauge . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Gasoline additives . . . . . . . . . . . . . . . . . . . 190
Low fuel level symbol . . . . . . . . . . . . . . . . . 18
Octane rating . . . . . . . . . . . . . . . . . . . . . . . 188
Recommendation . . . . . . . . . . . . . . . . . . . . 188
Refuelling . . . . . . . . . . . . . . . . . . . . . . . . . . 190
Reserve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Saving fuel ......................... 177
T ank capacity . . . . . . . . . . . . . . . . . . . . . . . 244
Tank system . . . . . . . . . . . . . . . . . . . . . . . . . 18
Unlocking the fuel filler flap by hand . . . . 192
Fuel economy messages (efficiency program) .24
F u el filler flap
Unlocking the fuel filler flap by hand . . . . 192
Fuses Assignment ... .. .. .. ....... 234, 235, 236
Replacing . . . . . . . . . . . . . . . . . . . . . . . . . . 234
G
Garage door opene r (Home Link) . . . . . . . . . . 36
Gas discharge lamps ................... 237
Gauges Engine coolant temperature . . . . . . . . . . . . . 8
Fuel gauge . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Tachometer . . . . . . . . . . . . . . . . . . . . . . . . . . 9
General illustration Instruments and controls . . . . . . . . . . . . . . . 6