key battery AUDI A3 2015 User Guide

220 Checking and Filling
Battery
General information
Under normal operating conditions, the bat­
tery in your Audi does not need any mainte­
nance. With
high outs ide temperatu res or
long daily drives we recommend that you have
the electro lyte level checked by a service fa­
cility. The e lectrolyte level shou ld also be
checked each time the battery is charged
c:>page222.
Have the battery checked when you take your
vehicle in for service. You are well advised to replace a battery that is older than 5 years.
With certain types o f airbag deployment, the
battery is disconnected from the vehicle elec ­
trica l system for safety reasons
c;, .&. in Re­
pair , care and disposal of the airbags on
page 156.
Disconnecting the battery terminals
Some vehicle functions such as power win­
dows are unavai lable if the battery termina ls
are d isconnected. These functions have to be
relearned after the battery terminals are con­
nected again. To prevent this, the battery
should only be disconnected from the vehicle
electrical system when absolutely necessary
for repairs .
To reprogram the functions, proceed as fol­ lows:
Function Reprogramming
Power window one-c;, page 40, Correcting
touch up/down power window mal-
function functions
Remote control key If the vehicle does not
or react to the key, it
convenience key must be synchroni zed
c:>page 33
Digital clock c:>page 10
ESC indicator light The indicator light
goes out after driving
a few meters
Vehicles not driven for long periods
If you do not drive your vehicle over a period
of severa l days or weeks, e lectrica l compo­
nents are gradually sca led back or switched
off. This reduces energy consumption and
maintains starting capability over a longer pe­
riod
c;, page 190. Some of the conven ience
functions may not operate, such as the interi­
or lights or power seat adjustment. The con ­
venience functions will be availab le aga in
when you switch on the ignition and start the
engine.
Winter operation
During the winter months, battery capacity
tends to decrease as temperatures drop. This
is because more power is also consumed wh ile
sta rting, and the headlights, rear window de­
fogger, etc. , are used more often.
Avoid unnecessary power consumpt ion, par­
ticularly in city traffic or when traveling only
short distances. Let your authorized Aud i
dealer check the capacity of the vehicle bat­
tery before winter sets in ~ page 222. A well
charged battery will not on ly prevent starting
problems when the weather is cold, but will
also last longer.
A WARNING -
-Work on the battery requ ires expert
know ledge. Contact your authorized Audi
dealer qualified repair facility for infor­
mat ion regarding the vehicle battery.
There is a risk for chemical burns or ex­
p losions.
- Never open the vehicle batte ry . Do not
try to change the battery electrolyte lev­
el. Otherwise explosive gas will escape
from the battery and increase the risk of
an explosion .
(i) Tips
If your vehicle is left standing for several
weeks at extremely low temperatures, the
vehicle battery should be removed and
stored where it w ill not freeze. This will ..,.

Index 273
-----------------------------------.......
Audi drive select . ... .... ... .. .. .. .. . 102
Indicator light . . . . . . . . . . . . . . . . . . . . . 25
Aud i magnetic ride
refer to Adaptive dampers . .. .. .. .. . 102
Aud i Service Repa ir Manuals and Litera-
ture .. .. .. ... ............. ... ... .. 268
AUTO Automatic climate control system . .. .. 67
Automatic headlights . .... .. .. .. .. .. 42
Auto Lock (centra l locking system) . ... .. 32
Automatic belt retracto r .. .. .. .. .. .. . 134
Automatic climate control system
refer to Climate control system (auto-
mat ic) ... .. ................. .. .... 66
Automatic headlights .... ... .. .. .. .. .. 42
Automatic transmission ............ .. 105
Dr iving t ips . ............. .... .. .. . 107
E mergency mode ......... .... .. .. . 111
H ill descent co ntrol ....... .. .. .. .. . 10 9
I gnition key safety in terlock . . . . . . . . . . 70
K ick -down .. .. ... .. ..... ... .. .. ... 110
L aunch Contro l-Program ... .. .. .. .. . 1 11
malfunction ............. .... .. .. . 106
Selector lever emergen cy rele ase .. .. . 112
Selector lever lock . . . . . . . . . . . . . . . . . 106
Selecto r lever pos it io ns ....... .... .. 105
Shift ing ma nua lly ............ .... .. 110
St eer ing whee l w ith shift paddles .. .. . 110
S tron ic .. .. .... ............. .. .. . 105
tiptronic . .. .... ........... .. .. .. . 110
Automatic wipe/wash system .. .. . ... .. 46
Auto Safety Hotline ..... ... .. .. .. .. . 129
Average consumpt ion ....... .. .. .. .. .. 27
Average speed .. ........... .. .. .. .. .. 27
B
Battery ... .. .. .. ........... .. .. ... 220
C harge level ............. .... .. .. . 190
C ha rging . . . . . . . . . . . . . . . . . . . . . 20, 222
Energy management .......... ... .. 190
Impor tant war nings ....... ... ... .. 22 1
Indicator light . . . . . . . . . . . . . . . . . . . . . 20
J ump starti ng ............ .... .. .. . 259
L ocat ion . .. .. .. ........... .. .. ... 22 1
Replacing the ba ttery .. ... .. .. .. .. . 223
Wo rking on the battery . ... .. .. .. .. . 22 1
B efore dr iving ... .. ..... ... .. .. .. .. . 121 B
lended gaso line .... . .. .. ..... ... .. 206
B lowe r
automat ic Climate contro l system .. .. . 67
Manua l cli mate control system ... .. .. . 65
Booster seats . .. .. .. . ... ...... ... .. 175
B rake fluid
Changing the brake fluid ..... ... .. .. 219
Checking the brake fluid level ...... .. 219
Wha t is the correct brake fluid level? .. 219
Wha t should I do if the brake fluid warn-
. l' h ? mg 19 t comes on ................ . 219
Brakes ... .. .. .... .. . .. .. ..... ... .. 187
Brake assist system . . . . . . . . . . . . . . . . 185
Brake booster .. .. .... ............. 187
Ind icator light . . . . . . . . . . . . . . . . . 18, 24
New brake pads . . . . . . . . . . . . . . . . . . . 187
Pa rking brake .. .. .. .......... ...... 76
Brake system Brake fluid .. .. .. ................. 219
Brake fluid specifications for refill and re-
placeme nt ... .... ................ 219
B ra ke pads .. .. .. .. . .. .... .... .. .. 193
Fl uid reservo ir ..... ... .. ..... ..... 219
W orn brake pads symbo l . . . . . . . . . . . . . 22
Brak ing
Emergency brak ing funct ion ........ .. 78
Starting on inclines .. .. .. .. ... ... .. . 78
Break -in per iod .. ...... ............. 193
Brake pads .. .. .. ............... .. 193
Tires ..... .. .. .. ................. 193
Bulb s .... .. .. .. .... . ... ...... ... .. 258
C
Cali forn ia Pr oposition 65 War ning . .. .. 211
B attery specific .... . .. ... .... ... .. 222
Capacities Fuel tank .. .. .. .... .......... ..... 266
Washe r fl uid reservo ir .......... .... 266
Care ....... .. .. .. ................. 201
also refer to Cleaning ......... .... . 201
Cargo area . ... .. .... . ... ...... ... .. 127
Cargo net . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Catalytic converter . ................. 194
CD -RO M playe r (nav igat ion) . . . . . . . . . . . . 58
Cent ral indicator light .............. .. 14
•
•
•

276 Index
E
ECO mode (automatic climate control sys -
tem) . ..... .. ................ ..... .. 67
EDL
refer to Electronic differentia l lock . .. . 185
Efficiency program . . . . . . . . . . . . . . . . . . . 28
Description . ...... .......... ... .. .. 28
Fuel economy messages . . . . . . . . . . . . . 29
Other equipment . . . . . . . . . . . . . . . . . . . 29
Electrical accessories
refer to Socket ............. .. .... .. 56
Electromechanical parking brake
refer to Parking brake ............... 76
Electromechanical steering .. .. .. .. .. . 189
I ndicator lights .......... .. .. .... . 189
Electronic differential lock ... .... .... . 185
Indicator light . . . . . . . . . . . . . . . . . . . . . 22
Electronic immobilizer ....... ... .... .. 36
also refer to Immobilizer . . . . . . . . . . . . 31
E lect ronic interaxle differential lock .... 185
Electronic speed limiter ..... .. .. .. .. . . 30
Electronic stabilization control (ESC)
Indicator light . . . . . . . . . . . . . . . . . . . . . 22
Electronic Stabilization Control (ESC) ... 185
Emergency assistance .......... .... . 246
Emergency flasher .......... ... .... .. 43
Emergency flashers
I ndicator light . . . . . . . . . . . . . . . . . . . . . 25
Emergency operation Emergency braking function .. .. .. .. . . 78
Front passenger's door/rear doors . . . . . 3 7
L uggage compartment lid ........ .. . 246
Panorama sunroof ........ .. .. ...... 41
with conven ience key .... .. .. .. .. .. . . 75
Emergency release Fuel filler door .............. ... ... 209
Selector lever . . . . . . . . . . . . . . . . . . . . . 112
Emergency starting ........ .. .. .. .. . 259
Emergency towing ......... .. .. .. .. . 261
Energy management . . . . . . . . . . . . . . . . 190
Indicator light . . . . . . . . . . . . . . . . . . . . . 20
Engine Coolant .. .. ..................... . 216
Starting with jumper cables .... .... . 259
starting (button) . .. ...... .. .. .. .. . . 73 Starting (driver messages with conven-
ience key) ..... .. ................ .. 75
starting (key) . ... ................ .. 70
stopping (button) ............. ..... 74
stopping (key) ................ ..... 72
Engine compartment
Closing the hood . . . . . . . . . . . . . . . . . . 211
Opening the hood ................ . 211
Overview .. .... .. ... .......... .... 212
Safety precautions ............... .. 210
Engine control (indicator light) . . . . . . . . . 23
Engine coolant .. .. .......... ... .. .. 216
Radiator fan ... .. ... .......... .... 218
Engine oil .. ................... .... 212
adding . .. .. .. .. ... .......... .... 215
Changing . ...... ... ......... ... .. 216
Checking the oil level ... ..... ... .. .. 215
Dipstick... .. .. .. .... .... .... 212, 215
Indicator light .................... . 20
Oil consumpt ion .. ............. .. .. 214
Oil grades ..... .. ............. .... 212
Specification and viscosity ........ ... 212
Use ..... ..... .. .. .............. . 215
Engine speed limitation ( indicator light) . 23
Environment Break -in per iod . .. ... ....... ... .. .. 193
Catalytic converter ....... ...... .. .. 194
Disposing of your vehicle battery ..... 223
Driving at high speeds .......... .... 195
Driving to minimize pollution and noise 195
Fuel economy .... ................ . 195
Letting the vehicle stand and warm up . 196
Proper disposal of drained brake fluid . 219
Proper disposal of drained engine oil .. 216
Unleaded fuel .... ... .......... .... 206
What should I do with an old battery? . 223
EPC (engine control) ................ .. 23
ESC Electronic stabilization control ... .. .. 185
Post-coll is ion brake assist ..... .. .. .. 186
Sport mode ... .. ................ . 187
ESP
refer to ESC ... .. ..... ..... ... .. .. 185
Event Data Recorder (EDR) ............ 185
Exhaust tail pipes cleaning ........... 202
Exterior lighting ... ..... ..... ... .. .. . 42

278 Index
How many airbags does my vehicle have?
How often should I check my tire pres-148
sures? .. .. .... ............. ...... . 232
How safety belt pretensioners work .... 137
Hydroplaning .............. ... .... . 236
I
Ignition
Indicator light . . . . . . . . . . . . . . . . . . . . .
21
switching on and off (with button) ... .. 73
Ignition key safety interlock . . . . . . . . . . . 70
Ignition lock
mechanical . . . . . . . . . . . . . . . . . . . . . . . .
70
Immobiliz er . . . . . . . . . . . . . . . . . . . . . . . . 31
Important things to do before driving .. 121
Improperly worn safety belts . . . . . . . . . . 13 7
Indicator lights . . . . . . . . . . . . . . . . . . . . . .
14
Infant seats .............. .... .... . 172
Installing child safety seats
Safety belts . . . . . . . . . . . . . . . . . . . . . .
177
Insta lling the upper tether strap on the
anchorage ..... ........... .... .... .
183
Instrument cluster ......... ...... .. .. 10
Instruments ................. ..... .. 10
Adjusting the lighting ........... ... . 45
Interior lighting ..................... 45
Intermittent (windshield wipers) ... .... 46
]
Jump-starting 259
Jump er cables ... .......... .. .. .. .. . 260
K
Key ......... ........ ........ ....... 31
Checking the number ................ 31
Driver messages (mechanical ignition
key) ..... .. ................ ..... ..
75
Dr iver messages (with convenience key). 75
Key not recognized ......... ... .... .. 75
Key replacement . . . . . . . . . . . . . . . . . . . 31
Replacing the battery ....... .. .. .. .. 33
un locki ng/locking . . . . . . . . . . . 33, 34, 35
Key recognition
automatic climate control system ... ..
66
Manual climate contro l system . . . . . . . . 65
Kick-down
Automatic transmission
110
Kn ee air bags ................... .... 157
Description .. .. .. ............. .. .. 157
How they work .................... 158
Important safety instructions ........ 159
L
Lane assist
refer to Active lane assist ........ ... . 94
LATCH ........ .... ............... . 180
Description .... .. .. .............. . 181
Installing a child restraint ........... 182
Location ......................... 181
Mounting and releasing the anchorage
hook ..... .... .. .. .............. .
182
Launch Control-Program (automatic trans-
m1ss1on) ....... .. .. ........... ....
111
Leather care/clean ing ................ 204
Leaving home ..... .................. 44
LED headlights
All-weather lights ..................
42
Lifting jack . .. .. .. ................. 251
Lifting vehicle .................. .... 263
Light
adaptive light .. .................. ..
42
Adjust ing automatic headlights ....... 44
Coming/Leaving home .............. . 44
Fog lights/rear fog light(s) ........... 42
Headlight flasher ................... 44
Headlights . . . . . . . . . . . . . . . . . . . . 42, 44
Highway light .... ................ ..
43
Low beams ..................... ... 42
Parking light .......................
42
Switching daytime running lights on and
off ........... .. .. .............. .. 44
Light/rain sensor
Head lights ....................... . 42
Indicator light .....................
25
Intermittent (windshield wipers) ...... 46
Lighting
Exterior . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Interior . . . . . . . . . . . . . . . . . . . . . . . . . . .
45
Lights
Ambient lighting ...................
45
Headlight range control system ... ... . 42
Interior/reading . ...................
45