check engine light AUDI A8 2016 Owner's Manual

Check ing and F illing
@
No
- spark s
- fl ame s
- smokin g.
~
Wh en a b att ery is ch arg ed , it produc es
h yd ro ge n ga s which i s explosive and
could cau se per sonal injury.
®
Always keep the b atter y well out of
r each of child ren.
A WARNING
Whenever work ing on the battery or on the
elect rical system, there is the risk of injury,
accident and
even fire. Read and heed the fol­
lowing WARN INGS :
- Always wear eye protection. Do not let bat­
te ry acid or any lead particles get on your
sk in or cloth ing . Sh ield your eyes. Explosive
gases can cause blindness or other injury .
- Battery acid con tains su lfu ric acid. Sulfur ic
acid can cause blindness and severe b urns.
- Always wear gloves and eye protection. Do
no t tilt the battery because acid could leak
out of the ventilat ion open ings .
- If you get battery ac id 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-
t ive cables.
- When working on the battery, be sure not to
short-circuit the terminals with tools or oth ­
er metal objects. Th is wou ld 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
ca use personal injury.
- Always keep the battery well out of the reach of ch ildre n.
232
-
-Before work is done on the electrical sys­
tem, disconnect the negative gro und cable.
- Before performing any work on the e lectri­
cal system, switch off the engine and ign i­
tion as well as any electrical equ ipment . The
negat ive cab le 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 d isconnecting 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 cab le and then the
positive cable.
- Before reconnect ing the battery, make sure
all electr ica l consume rs a re switched off .
Reconnect the positive cable first and then
the negative cable . Never in terch ange t he
cables -this could sta rt a fire!
- Never cha rge a frozen or a thawed-out bat­
tery . It cou ld explode ! If a ba ttery 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 batter ies which are damaged.
There is the danger of an exp losion! Always
replace a damaged battery .
A WARNING
Califo rnia Proposition 65 Warning :
- Batte ry posts, te rm inals and related acces­
sories contain lead and lead compounds,
chemicals known to the State o f Cali fornia
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 w ill damage electronic
components in the electrical system.
- If your veh icle is go ing to stand for a long
period of time w ithout being driven, protect
the battery from "freezing", otherwise it ..,.

Check ing and F illing
warm water and baking soda to neutralize
the acid.
CD Note
Never use a fast charger as a booster to start
the engine . This will serious ly damage sensi­
tive electronic components, such as control
units, relays, radio, etc., as well as the battery
charger.
Battery replacement
T he new battery must have the same specifica­
t ions and dimensions as the original equipmen t
bat tery.
Int elli g ent en ergy managem ent in your vehicle is
responsible for distributing the electrical energy
throughout your vehicle
r=> page 195. The intelli­
gent energy management system will keep the
engine battery charged better than veh icles w ith­
out this system . To make sure the addit ional
e lectrical energy is avai lab le once again after you
have changed the battery, we recommend that
you install batteries of the same type and manu­ facture on ly (the same as those installed at the
time your vehicle was delivered). Specifications
are listed on the battery housing. Your author­
i z ed dealer must code the battery in the energy
management system to enable you to use the en­
ergy management functions correctly after re ­
placing the battery .
The new battery must have the same capacity,
voltage (12 volts) , amperage, construction and
plug sealing .
When installing the battery, make sure the igni­
tion and all electrical consumers are sw itched
off.
CD Note
- Make sure the ventilation hose on the s ide
of the battery is connected, otherw ise
fumes or battery ac id can leak out.
- Vehicles with the Start-Stop-System* are equipped with a special cycle-proof AGM battery . Installing a d ifferent type of bat­
tery can cause problems in the vehicle elec -
234
trical system. When replacing the vehicle
battery, always install one with the same
specifications as the original battery .
- Battery mounts and clamps m ust always be
secured correctly.
- Read and follow the warnings under
¢ page 231, Working on the battery before
performing any work on the battery .
@ For the sake of the environment
Because of the p roblem of proper disposal of
a battery, we recommend your authorized
A udi dealer change the battery for you . Bat­
teries contain sulfur ic acid and lead and must
a lways be disposed of properly in compliance
with all environmental regulations . Disposing
of veh icle batteries improperly is very danger­
ous to the environment .
Windshield washer
system
Fig. 204 En gin e compa rt ment: washer fluid rese rvoir cap
The w indshield washer fluid reservo ir Q conta ins
the cleaning solution for the w indshield and the
headlight washe r system ¢
fig. 204, ¢ page 222.
The reservoir capacity is found in
r=> page 2 78 .
To reduce the risk of lime scale depos its on the
spray nozzles, use clean water with low amounts
of calcium. Always add w indow cleaner to the wa­
ter . When the outside temperat ures are cold , an
anti-freez ing agent shou ld be added to the water
so that it does not freeze. ..,.

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 ¢ .,&. .
1> lfyou are towing a trailer, unhitch the trailer
from your vehicle.
.,. Take the
jack and the spare tire out of the lug­
gage compartment,
¢page 257.
..&, WARNING
You or your passengers could be injured wh ile
changing 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
emergency flashers on and use other warn­
ing devices to alert other motorists.
- Make sure that passengers wa it in a safe
place away from the vehicle and well away
from the road and traffic.
- T o 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, plac ing 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 vehicle tool k it, the jack
and the replaced tire in the luggage com­
partment ¢
page 135.
Emergency assistance
{!) Tips
Before changing the wheel, you must activate
the jacking mode, so that the automat ic con­
tro ls for the Adaptive Air Suspension do not
make it more difficult to lift the vehicle with
the jack ¢
page 261 .
Changing a wheel
When you change a wheel , follow the sequence
described below step-by-s tep and in exactly tha t
order .
l. Activate the vehicle jack mode ¢ page 261 .
2. Remove the decorative wheel cover*. For
more details see also¢
page 260, Decora ­
tive wheel covers
or¢ page 260, Wheels
with wheel bolt caps .
3. Loosen the wheel bolts¢ page 260.
4. Locate the proper mounting point for the
jack and align the jack below that point
¢ page 261 or¢ page 262.
5. Raise the car with the jack¢ page 261 or
¢page 262.
6. Remove the wheel with the flat tire and then
install
the spare ¢ page 263.
7. Tighten all wheel bolts lightly .
8.
Lower the vehicle with the jack .
9. Use the wheel bolt wrench and
firmly tighten
all wheel bolts<=>
page 260.
10. Replace the decorative wheel cover*.
11. Deactivate the vehicle jack mode in the MMI :
I CAR! function button > Car systems contro l
button
> Servicing & checks > Air susp.: jack
mode > Off.
The vehicle jack mode switches off automatically
at speeds above 10 km/h .
..&, WARNING
Always read and follow all WARNINGS and in­
formation
¢ .&. in AB: Raising the vehicle on
page 262
and ¢ page 264.
259

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
ope rations.
Starting by pushing or
towing
(D Note
Veh icles with an automatic transmission can­
not be started by pushing or towing.
Starting with jumper
cables
If necessary, the engine can be started by con­
necting it to the battery of another vehicle .
If the engine shou ld 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 jumpe r cables to start the engine.
Jumper cables
Use only jumper cables of suffic iently large cross
section
to carry the starter current safely. Refer
to the manufacturer's specifications.
Use only jumper cables with
insulated term inal
clamps which are dis tinct ly marked :
plus(+) cable in most cases colored re d
minus( -) cable
in most cases colored blac k.
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 avo id leaning
over the battery whenever poss ible.
- A discharged battery can freeze at tempera­
tures just below 32 °F (0 °C) . Before con­
necting a jumper cable, you must thaw the
Emergency situations
frozen battery completely, otherwise it
could explode .
- 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 exp losion.
- Vehicle batteries generate exp losive 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 vo ltage 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
batter ies of different voltage or substantial­
ly different "Ah" rating may cause an exp lo­
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 batter ies of different voltage or sub ­
stantially different capacity (Ah) rating may
cause an exp losion and injury. The capac ity
(Ah) of the booster battery should not be
lowe r than that of the discharged battery.
- Before you check anything in the eng ine
compartment, always read and heed all
WARNINGS
r::!)page 220.
(D Note
-Applying a higher voltage booster battery
will cause expensive damage to sensitive
electronic components, such as control
units, relays, radio, etc.
- Th ere 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.
(D Tips
- The discharged battery must be properly
connected to the vehicle's e lectrica l system. ..,.
271

Emergency situations
When jump starting or charging the bat­
tery, never connect the negative ground ca­
ble to the battery negative post because the
battery manager system must be able to de­
tect the battery's state of charge. Always
connect the negative ground cable to the
negative ground post of the battery manag­
er contro l unit.
Use of jumper cables
Make sure to connect the jumper cable clamps in
exactly the order described below!
F ig . 230 Engine compar tment: connectors for jump start
cables and cha rger
F ig. 231 Jump starti ng wit h the battery of another veh icle:
@ -boos ter battery, @-disc harged vehicle battery
The procedure described be low for connecting
jumper cables is intended to provide a jump start for your vehicle.
Vehicle with discharged battery:
• Turn off lights and accessories, move leve r of
automatic transmission to N (Neutral) or P
(Park) and set parking brake.
Connect POSITIVE (+) to POSITIVE (+) ( red)
• Open the red cover on the positive term inal
¢ fig. 230.
272
1. Connect one end of the red positive cable on
the
jump start bolt 9 fig. 231 (D (bolt under
the red cover= "positive") of the veh icle to be
started @.
2. Connect the other end to the positive termi-
nal @ of the booster battery @.
Connect NEGATIVE (- ) to NEGATIVE(-)
(black)
3. Connect one end of the black negative cable
to the negative term inal @ of the booster
battery @.
4. Connect the other end to the
jump start pin
@ (bolts with hex head bolt= "negative") of
the vehicle to be started ®·
Starting the engine
• Start the eng ine of the vehicle with the booster
battery @. Run the eng ine at a moderate
speed.
• Sta rt engine w ith discharged vehicle ba ttery @
in the usual manner.
• If the engine fails to start, do not keep the
starter cranking for longer than 10 seconds.
Wait for about 30 seconds and then try again.
• With engine running, remove jumper cables
from both vehicles in the exact
reverse order.
• Close the red cover on the positive terminal.
The battery is vented to the outside to prevent
gases from entering the vehicle interior . Make
sure that the jumper clamps are well connected
with their metal parts in full contact with the battery terminals.
&_ WARNING
To avoid ser ious personal injury and damage
to the vehicle, heed all warnings and instruc­
tions of the jumper cable manufacturer. If in
doubt, call for road service.
- Jumper cables must be long enough so that
the vehicles do not touch .
- When connecting jumper cables, make sure
that they cannot get caug ht in any moving
parts in the engine compartment.
- Before you check anything in the engine
compartment, always read and heed all
WARNINGS
¢ page 220.

Index
Auto Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Automatic belt retractor . . . . . . . . . . . . . . . 141
Automatic climate control Air vents . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Automatic recirculation . . . . . . . . . . . . . . . . 79
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Automatic climate control system synchroni zing . . . . . . . . . . . . . . . . . . . . . . . . 78
Automatic post-collision braking system . . 191
Automatic transm ission . . . . . . . . . . . . . . . . 112
Automatic transmission (tiptronic) Emergency mode . . . . . . . . . . . . . . . . . . . . 116
Kick-down .. .. .. ................. ... 115
Manual shifting . . . . . . . . . . . . . . . . . . . . . 115
Parking lock emergency release . .. .. .. . 117
Selector lever positions . . . . . . . . . . . . . . . 112
Automatic wipers . . . . . . . . . . . . . . . . . . . . . . 54
Auto Safety Hotline . . . . . . . . . . . . . . . . . . . 136
Average consumption . . . . . . . . . . . . . . . . . . . 24
Average speed . . . . . . . . . . . . . . . . . . . . . . . . 24
Avoid damaging the vehicle . . . . . . . . . . . . . 197
B
Battery
Charge level . . . . . . . . . . . . . . . . . . . . . . . . 195
Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . 233
E nergy management 195
Important warnings . . . . . . . . . . . . . . . . . 231
Location . . . . . . . . . . . . . . . . . . . . . . . . . . . 231
Replacing the battery . . . . . . . . . . . . . . . . 234
Working on the battery ........ .... .. . 231
Before driving . . . . . . . . . . . . . . . . . . . . . . . . 129
Belt tensioners . . . . . . . . . . . . . . . . . . . . . . . 144
Blended gasoline . . . . . . . . . . . . . . . . . . . . . 212
Blower (automatic climate control) . . . . . . . . 78
Booster seats . . . . . . . . . . . . . . . . . . . . . . . . 176
Brake fluid
Changing the brake fluid . . . . . . . . . . . . . . 230
Checking the brake fluid level . . . . . . . . . . 230
Brake system
Anti-lock brak ing system . . . . . . . . . . . . . . . 18
Brake assist system . . . . . . . . . . . . . . . . . . 190
Brake booster . . . . . . . . . . . . . . . . . . . . . . . 193
Brake fluid specifications for refill and re­
placement . . . . . . . . . . . . . . . . . . . . . . . . . 230
286
Brake light defective . . . . . . . . . . . . . . . . . . 21
Brake power assist un it . . . . . . . . . . . . . . . 192
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192
Electromechanical parking brake . . . . . . . . 83
Warning/indicator lights . . . . . . . . . . . . . . . 14
Worn brake pads symbol . . . . . . . . . . . . . . . 19
braking guard Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Braking guard . . . . . . . . . . . . . . . . . . . . . . . . . 90
Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Break -in period
Brake pads . . . . . . . . . . . . . . . . . . . . . . . . . 192
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
Breaking in . . . . . . . . . . . . . . . . . . . . . . . . . . 197
New tires . . . . . . . . . . . . . . . . . . . . . . . . . . 243
Bulbs 270
C
California Proposition 65 Warning . . . . . . . 221
Battery specific . . . . . . . . . . . . . . . . . . . . . 232
Capacities . . . . . . . . . . . . . . . . . . . . . . . . . . . 278
AdBlue . .. .... .. .. .. ...... ......... 216
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . 223
Carbon parts Cleaning . . . . . . . . . . . . . . . . . . . . . . . 208, 209
Car carrier Transporting your vehicle . . . . . . . . . . . . . 274
Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206
Cargo area
refer to Luggage compartment . . . . . . . . . 135
Catalytic converter 197
Center armrest
Cockpit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Central locking . . . . . . . . . . . . . . . . . . . . . . . . 32
Emergency locking . . . . . . . . . . . . . . . . . . . . 36
Certification . . . . . . . . . . . . . . . . . . . . . . . . . 284
Changi ng engine oil . . . . . . . . . . . . . . . . . . . 226
Checking Engine coolant level . . . . . . . . . . . . . . . . . . 22 7
Child restraints Danger of using child restraints in the front
seat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
Where can I get additional information about child restraints and their use? . . . . 186
Child restraint system anchors . . . . . . . . . . 180

Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Starting with jumper cables . . . . . . . . . . . 271
Stopping . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
E ng ine compartment . . . . . . . . . . . . . . . . . . 222
C losing the hood . . . . . . . . . . . . . . . . . . . . 221
Opening the hood . . . . . . . . . . . . . . . . . . . 220
Safety instructions . . . . . . . . . . . . . . . . . . . 220
Working in the engine compartment . . . . 220
E ng ine coolant . . . . . . . . . . . . . . . . . . . . . . . 227
Adding coolant . . . . . . . . . . . . . . . . . . . . . . 228
Checking the engine coolant level. . . . . . . 227
Expansion tank . . . . . . . . . . . . . . . . . . . . . . 227
Radiator fan . . . . . . . . . . . . . . . . . . . . . . . . 229
Temperature gauge . . . . . . . . . . . . . . . . . . . 10
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . 223
Adding . ... .. ................ ..... . 225
Additives . . . . . . . . . . . . . . . . . . . . . . . . . . . 225
Changing . . . . . . . . . . . . . . . . . . . . . . . . . . 226
Checking oil level . . . . . . . . . . . . . . . . . . . . 225
Checking the engine oil level . . . . . . . . . . . 224
Consumption . . . . . . . . . . . . . . . . . . . . . . . 225
Indications and conditions requiring extra
checking . . . . . . . . . . . . . . . . . . . . . . . . . . . 224
Indicator light . . . . . . . . . . . . . . . . . . . . . . . 17
O il consumption . . . . . . . . . . . . . . . . . . . . . 223
Pressure malfunction . . . . . . . . . . . . . . . . . 16
Recommended oil check intervals . . . . . . . 224
Sensor defective . . . . . . . . . . . . . . . . . . . . . . 21
Specification and viscosity . . . . . . . . . . . . . 223
E ng ine sound . . . . . . . . . . . . . . . . . . . . . . . . 106
Engine speed limitation . . . . . . . . . . . . . . . . . 20
Engine start-stop mode
r e fer to Start-Stop-System . . . . . . . . . . . . . 87
E ntry assistance . . . . . . . . . . . . . . . . . . . . . . . 64
Environment Catalytic converter . . . . . . . . . . . . . . . . . . . 197
Diesel particulate filter . . . . . . . . . . . . . . . 198
Disposing of your vehicle battery ...... . 234
Driving at high speeds . . . . . . . . . . . . . . . . 200
Fuel. .. .. .. .. .. ............. .. .. .. . 214
L eaks under your vehicle . . . . . . . . . . . . . . 220
Letting the vehicle stand and warm up . . . 200
Proper disposal of drained brake fluid . . . 230
Proper disposal of drained engine coolant 228
Proper disposal of drained engine oi l 225, 226
Recycling used engine oil . . . . . . . . . . . . . 225
Unleaded fuel . . . . . . . . . . . . . . . . . . . . . . . 212
What should I do with an old battery? . . . 234
Index
EPC
refer to Electronic power control (EPC) . . . 19
ESC Automatic post-collision braking system . 191
also refer to Electronic Stabilization Control
(ESC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190
Event Data Recorder (EDR) . . . . . . . . . . . . . 189
Exhaust tail pipes Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
Expansion tank . . . . . . . . . . . . . . . . . . . . . . . 227
Exterior lighting . . . . . . . . . . . . . . . . . . . . . . . 46
Exterior mirrors Adjusting . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Dimming .. .. .. . ... ............... .. . 52
Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Exterior temperature display . . . . . . . . . . . . . 23
F
Fastening
Booster seats . . . . . . . . . . . . . . . . . . . . . . . 176
Convertible child safety seats . . . . . . . . . . 17 4
Infant seats ... .. .. ................. 173
Floor mats . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Folding table . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Foot pedals . . . . . . . . . . . . . . . . . . . . . . . . . . 134
For the sake of the environment
Environmentally-friendly driving . . . . . . . 199
Gasoline fumes and the env ironment.. .. 214
Reducing engine noise by early upshifting . 10
Refuelling . . . . . . . . . . . . . . . . . . . . . . . . . . 214
Saving fuel by early upshifting . . . . . . . . . . 10
Four zone automat ic climate control . . . . . . 77
Front airbags Description . . . . . . . . . . . . . . . . . . . . . . . . . 1 SO
How they work . . . . . . . . . . . . . . . . . . . . . . 154
Frontal collisions and the laws of physics . . 139
Front passenger seat adjustment . . . . . . . . . 64
Front seats Adjusting . . . . . . . . . . . . . . . . . . . . . . . . . . 131
Child restraints in the front seat . . . . . . . . 147
Fuel Additives.. .. .. .. .. ............... .. 212
Blended gasoline . . . . . . . . . . . . . . . . . . . . 212
Current consumption . . . . . . . . . . . . . . . . . . 24
Economy messages (efficiency program) . . 25
Fuel filler flap emergency release ..... .. 216
289