2009 AUDI S4 CABRIOLET battery capacity

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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.
Disconnecting the battery terminals
Some vehicle functions (power window regulators, for example) are
lost if the battery terminals are disconnected . Th ese functions have
to be relearned after the battery terminals are connected again. To
prevent this, the battery should only be disconnected from the
vehicle electrical system when absolutely necessary for repairs .
Vehicles not driven for long periods
If you are going to let your vehicle stand for a long time and not
drive it, you should remember there are electrical components
which are still functioning and they will draw energy from the
battery and drain it, for example, the engine immobilizer. To prevent
this, you can either charge the battery occasionally to keep it in
good working condition or you can disconnect the negative cable
on the battery.
Winter operation
During the winter months, battery capacity tends to decrease as
temperatures drop. This is because more power is also consumed
while starting, and the headlights, rear window defogger, etc., are
used more often.
Avoid unnecessary power consumption, particularly in city traffic or
when traveling only short distances . Let your authorized Audi dea ler
check the capacity of the vehicle battery before winter sets in
=>
page 265 . A we ll charged battery wil l not only prevent starting
problems when the weather is cold, but will also last longer.
Replacing battery
The new battery must have the same capacity, voltage (12 volts),
amperage, construction and plug sea ling, as the origina l battery.
Specifications are listed on the battery housing. Batteries specially
developed by Audi fulfill the maintenance, output, and safety
requirements. When installing the battery, make sure the ignition and all electrical
consumers are switched off=>
0.
We recommend that you use maintenance -free or cyc le-resis­
tant/leak-proof
batteries according to the standards TL 825 06 (from
December 1997) and VW 7 50 73 (from August 2001).
Replacing the battery should be carried by a qualified workshop.
Please follow the instructions on the battery cover.
0 Note
• All work on the battery requires technical knowledge. Please
contact an Audi dealership or another authorized facility for ques­
tions about the battery -danger of acid burns and exp losion hazard!
• Make sure the ventilation hose on the side of the battery is
connected, otherwise fumes or battery acid can leak out.
• Battery holder and terminals always have to be secured correctly.
• Before all work on the battery follow the
warnings below=> & in
"Working on the battery" on
page 263.
Because of the problem of proper disposal of a battery, we recom­
mend your authorized Audi dealer change the battery for you.
Batteries contain sulfuric acid and lead and must always be
disposed of properly in compliance with all environmental regula ­
tions . Disposing of vehicle batteries improperly is very dangerous to
the environment . Make sure that the removed battery cannot over ­
balance, otherwise sulfuric acid might escape!
[ 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 will not freeze. This will prevent it from being damaged and
having to be replaced.•

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•
If t he electrolyte level is be low the "min" level, have an authorized
w or ksho p fil l the ba tte ry ce ll wit h
distilled water.
0 Note
Do not over fill th e batt ery, ot he rwi se ba ttery acid will overflow
through the vent opening. This can damage the paint and cause
cor rosion .•
Battery charging
Starting the e ngin e requi res a well charge d ba ttery.
- Always read and heed all WARNINGS~ & in "Working
o n th e b attery" on
page 263 and ~ ,& .
- S witch off the ignitio n an d all elec trical co nsu mers .
- Make sur e th e are a is well ventilat ed whe n y ou c harge
t h e ba ttery .
- Co nn ect cha rger cables. Charger cables must always be
connected POSITIVE
G) to POSITIVE G) and NEGATIVE Q
to NEGATIVE Q .
- Sw itch o n the cha rge r.
- Make s ure the c har ging rate is not ove r 6 amps.
- Tur n o ff the cha rger ~ ,& .
- Disco nnect t he charg er ca bles .
- Conne ct both batter y ca bles to the b attery if n ecessa ry-
first plu s, th en minus .
It is not necessary to re move t he bat tery from th e eng in e compart ­
ment, and it is also not necessa ry to disconnect the cab les. Norma
lly, a battery should be charged at no more than 10 percent
o f its rate d capaci ty.
For example, a char ging current of 4 .5 amps wou ld be used on a
battery rated at 45 Ah . Rated capacity of the battery in you r vehicle
i s list ed o n the batt ery housi ng.
T he battery caps should
not be opened when charging a battery.
& WARNING
Charging a battery can be dangerous .
• Always follow the operating instructions provided by the
battery charger manufacturer when charging your battery .
• Never charge a frozen battery . It may e xplode because of gas
trapped in the ice . Allow a frozen battery to thaw out first .
• Do not reuse batter ies which were frozen . The battery housing
may have cracked and weakened when the battery froze .
• Charge the battery in a well ventilated area . Keep away from
open flame or electrical spark. Do not smoke. Hydrogen gas gener ­
ated by the battery is explosive .
• To reduce the danger of explo sion, never connect or di sconnect
c harger cables while the charger is operating.
• Fast charging a battery is dangerous and should only be
attempted by a competent techni cian with the proper equipment .
• Battery acid that may spill during charging should be washed
off with a solution of warm water and baking soda to neutralize
the acid .
0 Note
Never use a fas t char ger as a booster to start the eng ine. Th is wi ll
seriously damage sensitive electronic components, such as control
units, relays, rad io, etc., as w ell as th e battery c harg er. •
Ve hic le care

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Emergency situations
General
This chapter is intended for trained emergency crew s and working
personnel who have the necessary tools and equipment to perform
these operations. •
Starting by pushing or towing
0 Note
Vehicles with an automatic tran smission cannot be started by
push ing o r towing . •
Starting with jumper cables
If n ece ssa ry, th e engin e ca n be sta rte d by conne cti ng it to
the battery of another veh ic le .
If the engin e should fai l to start because of a discharge d or weak
b at te ry, the batt ery can be con nected t o the batt er y of
another
ve hic le, using a pair of jumper cables to start the engine.
Jumper cables
Use
only jumper cables of suffici ently large cross section to safely
c arry the st ar ter curre nt. Refer to th e m anuf actu rer's sp ec ificati ons.
Use on ly j umper ca bles with
isolated termi na l clam ps and properly
marked fo r distinct ion :
plus (+l cable in mo st c ases c olor ed red
minus (-l cable in most cases colored black.
& WARNING
Batteries contain electricity , acid, and gas. Any of these can cause
very serious or fatal injury. Follow the instructions below for safe
handling of your vehicle 's battery .
• Always shield your eyes and avoid leaning over the battery
whenever possible .
• A discharged battery can already freeze at temperatures just
below 32 °F (0 °C). Before connecting a jumper cable, the frozen
battery must be thawed 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 explosion.
• Vehicle batteries generate e xplosive 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 voltage of the booster battery must also have a 12-Volt
rating . The capacity (Ahl of the booster battery should not be
lower than that of the discharged battery . Use of batteries of
diffe rent voltage or substantially different "Ah " rating may cause
an explosion and personal injury .
• Never charge a frozen battery. Gas trapped in the ice may cau se
an explosion .
• Never charge or use a battery that has been frozen . The battery
case may have be weakened.
• Use of batteries of different voltage or substantially different
capacity (Ah ) rating may cause an explosion and injury . The
capacity (Ahl of the booster battery should not be lower than that of the discharged battery . ...

IIPJI Alphabetical index _ __,__ ___ ____;_...::.:...::... ___________________________ _
Hood ...... ... ...... .. ... .. .. ... 249
Starting .. .... .... ....... ... 119,120
Starting with jumper cables ....... 304
Stopping . . . . . . . . . . . . . . . . . . . . . . .
120
Engine compartment
Safety instructions . . . . . . . . . . . . . . .
250
Working in the engine compartment 250
Engine coolant .................. ... 258
Checking the engine coo lant level .. 258
Malfunction warning symbol ... ..... 31
Engine coolant level
Checking ... .. .... .... ..........
258
E . I
ngine coo ant system ... .... ....... 257
Adding coolant .................. 259
Radiator fan . . . . . . . . . . . . . . . . . . . . . 260
Engine coolant temperature
Temperature gauge ....... .... ....
13
Engine data ...... ............... ... 314
Engine hood Closing ... .... ... .... .... ...... .
250
How to release the hood . . . . . . . . . . 249
Opening .. .... .... ....... .... ... 249
Engine oil ... ... .... .... .... ... .... 252
Adding ... .. ...... ... .... ...... . 255
Additives . . . . . . . . . . . . . . . . . . . . . . . 255
Changing . .............. ........ 256
Checking the engine oil level ...... . 254
Indications and conditions requiring extra
checking .... .... ....... .... ...
254
Indicator light . . . . . . . . . . . . . . . . . . . . 33
Oil capacity . . . . . . . . . . . . . . . . . . . . .
314
Oil consumption ................. 254
Oil grades . . . . . . . . . . . . . . . . . . . . . . . 252
Recommended oil check intervals .. 254
Sensor defective . . . . . . . . . . . . . . . . . . 33
Specification and viscosity ...... ..
252
Engine oil pressure
Malfunction .. ....... ..... ... .... . 32
Environment Break -in period .... .... .... .... ..
219
Catalytic converter .... .... .... ... 220
Disposing of your vehic le battery ...
262
Driving at high speeds ...... .... .. 221
Driving to minimize pollution and noise .
221
Fuel ......... .... ... .. .... .... .. 246
Fuel economy ....... ...... ...... 221
Leaks under your vehicle . ...... ... 250
Letting the vehicle stand and warm up
222
Proper disposa l of drained brake fluid
261
Proper disposal of drained engine
coo lant ..................... ...
259
Proper disposa l of drained engine oil
255,256
Recycling used eng ine oil ......... 255
Unleaded fuel ... .... ..... .... ... 244
What should I do with an old battery?
262
EPC
See Electronic power control .. ... .. . 22
ESP Electronic stabi lization program ....
212
See also Electronic stabilization program
(ESP) . ... .... .... ........ ......
212
Event Data Recorder (EDR) .. ....... .. 212
Expansion tank .. .. .. .. .. .... .... ... 258
F
Fahrenheit
Switching between Fahrenheit and Centigrade ... .... ..............
113
Fan
Climate controls ... ....... .... ...
114
Radiator ...... .... ........... ... 260
Setting the fan speed 114
Flat tire
Changing .. .... .... ............. 293
Floor mats
Fog lights
153
Front ....... ...... .... ........ ... 79
Folding master key with remote control . 47
Foot pedals . ... .. .... .... .... ...... 152
For the sake of the environment
Gaso line fumes and the environment
246
Letting your engine warm up ....... 120
Reducing engine noise by early
upshifting ......................
13
Refueling ......... ...... ........ 246
Saving fuel by early upshifting . ..... 13
Using the rear window defogger ....
116
Front airbags
Description ......................
172
How they work ..... .... ....... ... 177
Front ashtray . . . . . . . . . . . . . . . . . . . . . . . 104
Front seat adjustment
Safety guide lines .................. 92