change key battery AUDI A3 2015 Owners Manual

LED and batteries in the remote control
key
Fig. 17 Remote control key: LED
Fig. 18 Remote control key: opening the cover
LED in the remote control key
The LED ¢ fig. 17 can tell you about the func­
tion of the remote control key .
.. If you press a button quickly, the LED blinks
once .
.. If you press a button longer (convenience
opening*) , the LED blinks several times .
.. If the LED does not blink, the remote con ­
trol key battery is dead. The message
1111
Plea se change key battery can also appear
in the instrument cluster display. Replace
the battery.
Replacing the remote control key battery
.. Pry off the cover w ith a coin ¢ fig. 18 .
.. Insert the new battery with the"+" fac ing
up.
.. Press the cover back onto the key until it
clicks into place .
We recommend having the battery replaced
by an authorized Audi dealer or qualified re ­
pa ir facility.
Opening and closing 33
@) For the sake of the environment
Dead batteries must be disposed of using
methods that will not harm the environ­
ment. Do not dispose of them in house­
hold trash .
{!) Tips
The rep lacement battery must meet the
same specifications as the origina l battery.
Remote control key synchronization
The remote control key must be synchronized
if the veh icle does not lock and unlock w ith
the remote control.
.. Press the remote control key button~-
.. Insert the key in the driver door lock w ith in
30 seconds .
"' Press the
l@J button or~ button .
Unlocking/locking by remote control
Fig. 19 Remote control key or conve nien ce key buttons
@ffi Open
@ 6".i Close
©
c:s Close rear lid
@I PANIC I Trigger the alarm
.. To unlock the vehicle, press the@~
¢
fig. 19 button .
"' To lock the veh icle, bring the selector lever
into the P posit ion (automatic transm ission)
and press the®~ button .
"' To unlock the luggage compartment lid,
press the©~ button briefly. ..,.

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 ..,.