Get Service and care -> Battery (agm battery) Guide for Audi Q5 SUV Third Generation (2024-2026)

Checking and topping up fluids

 Brakes: stop vehicle and check brake fluid

level

Switch off any electrical equipment which is not

required (some equipment may be switched off

automatically). The performance of certain vehi-

cle functions may be limited and the vehicle’s

handling may be impaired. Drive to a qualified

workshop without delay.

Stop the vehicle and check the brake fluid level.

Seek professional assistance.

WARNING



Electrical system: low battery charge. Bat-

If the brake fluid level is under the MIN mark,

the effectiveness of the brakes and therefore

the safety of the vehicle may be impaired –

risk of accident! Do not drive on. Seek profes-

sional assistance.

tery will be charged while driving

– If this message disappears after a while, the ve-

hicle battery will have been sufficiently charged

while driving.

– If the message does not disappear again, drive

to a qualified workshop and have the fault rec-

tified.

CAUTION

If the brake fluid level is above the MAX mark,

brake fluid may escape via the cap on the res-

ervoir in certain circumstances and cause

damage to the vehicle.

WARNING

An electrical system fault can cause vehicle

functions to fail, thus impairing the vehicle’s

stability – risk of accident! Switch the vehicle

off and do not drive on. Seek professional as-

sistance.

Electrical system

Driver messages about the electrical

system

The following driver messages may appear, de-

pending on the equipment installed in your vehi-

cle:

Battery

General information on batteries

Because of the complexity of the power supply,

any battery work, such as disconnection, replace-

ment, etc. must be carried out by a qualified



If the warning lamp

lights up, there is a

power supply or battery fault or a fault in the ve-

hicle's electrical system.

workshop ð



Electrical system: fault. Safely stop vehicle

Several batteries using different technologies are

fitted in your vehicle:

The steering wheel may also vibrate when the

driver message appears. Stop the vehicle safely

and do not continue driving. You should also

switch off the vehicle ð . Seek professional as-

sistance.

– 12-volt vehicle battery (e.g. for basic supply)

ðpage 247, Safety information on batteries

If the vehicle is not used for long periods



Electrical system: fault. No restart possible.

The 12-volt battery gradually becomes dis-

charged if the vehicle is left standing for long pe-

riods. To ensure that the vehicle can be started,

the electrical equipment is powered back or

switched off. Certain convenience features, such

as interior lighting or electric seat adjustment,

may not be available. These functions will be re-

stored when you activate the drive system.

Please contact workshop

It will not be possible to restart the vehicle once

you have switched it off. The performance of cer-

tain vehicle functions may be limited and the ve-

hicle’s handling may be impaired. Drive to a

qualified workshop without delay.



Electrical system: fault. Please contact

workshop

Even though some systems are deactivated auto-

matically, certain electrical equipment continues 

245

Checking and topping up fluids

to draw current even when the ignition is off. If

the vehicle is left standing for long periods, this

can result in total 12-volt battery discharge. If

the vehicle battery is allowed to discharge com-

pletely, an internal chemical reaction damages

the battery irreparably. To avoid this, the battery

should be recharged at least once a month

ðpage 247. Please seek advice from a qualified

workshop.

part of the replacement procedure. Only

qualified workshops have the equipment re-

quired in order to perform the calibration

correctly. If the correct equipment is not

used, safety-related functions may fail – risk

of accident!

– Using a 12-volt vehicle battery that does not

have the same specifications or dimensions

as the factory-fitted 12-volt vehicle battery

can cause short-circuits or fires. Serious or

fatal injuries may occur as a result.

– Only maintenance-free and leak-proof 12-

volt vehicle batteries that have the same

specifications and dimensions as the facto-

ry-fitted 12-volt vehicle battery may be

used.

Winter conditions

Cold weather is very hard on the 12-volt vehicle

battery. For this reason, you should have the bat-

tery checked by a qualified workshop before the

start of winter.

Replacing the battery

The following description applies to the 12-volt

vehicle battery. Any work on the battery must al-

ways be carried out by a qualified workshop.

CAUTION

– If the car is left standing for long periods,

protect the 12-volt vehicle battery from

frost. The battery will be damaged irrepara-

bly if it is allowed to freeze ðpage 247,

Charging the 12-volt vehicle battery.

– Always have the 12-volt vehicle battery re-

placed by a qualified workshop because the

vehicle electronics must be calibrated as

part of the replacement procedure. Only

qualified workshops have the equipment re-

quired in order to perform the calibration

correctly.

The 12-volt vehicle battery has been developed

for use in its installation location and is equipped

with safety features. If a 12-volt vehicle battery

has to be replaced, please enquire about the

electromagnetic compatibility, capacity and the

required maintenance, performance and safety

features of the new 12-volt vehicle battery be-

fore purchasing it from your qualified workshop.

The gas vent on the 12-volt vehicle battery must

always be located on the side of the negative ter-

minal. The gas vent on the side of the positive

terminal must always be sealed.

– If a battery is used that does not meet the

quality specifications set by Audi, or that

has a battery capacity that is too low, the

vehicle’s certification for use on public roads

is void and thus also the vehicle’s registra-

When replacing the 12-volt lead battery, use only

maintenance-free 12-volt lead batteries to

standards TL 825 06 and VW 7 50 73. These

standards must be from October 2014 or later.

tion ð

For the sake of the environment

WARNING

 Batteries and electric/electronic equip-

ment must be disposed of appropriately

ðpage 290, Information on waste disposal.

– Any work on the batteries and electrical sys-

tem in your vehicle entails a risk of injury

and chemical burns in addition to danger of

accident or fire. For this reason, you must

have the work carried out by a qualified

workshop.

– Always have the 12-volt vehicle battery re-

placed by a qualified workshop because the

vehicle electronics must be calibrated as

246

Checking and topping up fluids

Safety information on batteries

Explanation of warning symbols:

WARNING

Any work on the batteries must always be car-

ried out by a qualified workshop.

 ^{Observe all warnings – risk of injury!}

– Any gases escaping from batteries may be

toxic or flammable.

/ Always read the instructions in the Own-

– The substances contained in batteries can

be corrosive. If the contents of the battery

come into contact with your skin, rinse the

affected area with clean water for at least

15 minutes and then wash with soap. Have

the affected area examined by a doctor.



er’s Manual.

12-volt vehicle battery. High-voltage com-

ponent. Improper handling can cause

short circuits ð in General information

on batteries on page 246.



With the exception of jump-starting and

charging the 12-volt vehicle battery, all

work on the 12-volt vehicle battery must

Charging the 12-volt vehicle battery

 ^{be performed by a qualified workshop}

in General information on batteries

on page 246 ð in General information

on batteries on page 246.

Electrolyte is extremely corrosive. Always

wear protective gloves and safety glasses.

First aid: If electrolyte comes into contact

with the eye, rinse the eye immediately

with fresh water for several minutes. Seek

medical assistance without delay. Neutral-

ise any electrolyte spilt on skin or clothing

immediately with soapy water and rinse

with plenty of fresh water. If electrolyte is

drunk by accident, seek the assistance of a

doctor immediately.



Fig. 128 Engine compartment: Terminals for jump leads

or battery charger

Please read the safety information ðpage 235,

Safety information on the engine compartment,

in General information on batteries on

page 246 and ð

 ^{Always wear safety glasses.}

Important: Only use battery chargers with a max-

imum charging voltage of 14.8 V. The battery

cables remain connected.

If electrolyte comes into contact with the



eye, rinse the eye immediately with fresh

water for several minutes. Seek medical

assistance without delay.

The terminals for the charging cables are located

in the engine compartment. The earth point

always on the vehicle's body.

–

Keep open flames, sparks, uncovered



lights and lit cigarettes away from the

►

Switch off all electrical equipment and the vehi-

cle.

Open the bonnet ðpage 236.

Open the cap on the positive terminal

ðFig. 128.

battery! Avoid sparks and short-circuits

when handling cables and electrical equip-

ment.

►

Always keep children away from batteries

►



Carefully and correctly connect the charger ca-

bles (according to the manufacturer’s instruc-

tions for the battery charger) to the positive

and electrolyte.

A highly explosive mixture of gases may

be given off when the battery is under

charge!



terminal

and then to the earth point - .

►

Connect the battery charger to the mains and

switch it on.



247

Checking and topping up fluids

►

Keep the bonnet fully open while charging

damaged, do not charge the vehicle or use

the positive terminal to jump start the vehi-

cle, as there is a risk of a short circuit or fire!

Please contact a qualified workshop.

►

After charging the battery: switch off the bat-

tery charger and disconnect the mains cable.

Now disconnect the charger cables. First from

the earth point

nal + .

Close the cap on the positive terminal.

and then the positive termi-

Windscreen washer

system

►

Close the bonnet ðpage 236.

Filling the windscreen washer system

Information on charging

– Use only the terminals in the engine compart-

ment to charge the battery.

– Important: Before you charge the battery make

sure you read the manufacturer's instructions

for using the battery charger.

WARNING

– Never use unsuitable charging equipment or

charging equipment which is visibly dam-

aged and/or dirty. Always check the charg-

ing equipment for damage before use.

– Charging cables or jump leads for the nega-

tive terminal must never be connected di-

rectly to the 12-volt battery on your vehicle.

Only use the earth point on the vehicle body

in the engine compartment ðpage 247.

– A highly explosive mixture of gases may be

given off when the battery is under charge.

Only charge the battery in a well ventilated

area.

Fig. 129 Engine compartment: Cap of windscreen washer

container

Please refer to the safety information

ðpage 235, Safety information on the engine

compartment.

The container for the windscreen washer  con-

tains the cleaning fluid for the windscreen/rear

window and the headlight washer system

ðpage 237. For the container capacity, please

refer to ðpage 288.

Clean water should be used when topping up. If

possible, use soft water to prevent scaling on the

washer jets, or ideally, distilled water. Always

add washer fluid to the water. In cold weather

you should add anti-freeze to the water to pre-

vent it from freezing.

– When it is discharged the battery can freeze

at temperatures around 0°C. You must not

use a battery which has frozen, even after it

has thawed, because the ice may have

cracked the battery casing and allowed the

electrolyte to escape – risk of explosion and

chemical burns! Please seek advice from a

qualified workshop.

CAUTION

– The anti-freeze concentration must be

matched to the climate of the country in

which you are driving. If the concentration is

too high, damage to the car may result.

– Never put in radiator anti-freeze or other

additives.

– Do not connect or disconnect the charging

cables during the charging process – risk of

explosion!

– Leave the bonnet open while the 12-volt ve-

hicle battery is charging. Closing the bonnet

could cause an electrical short circuit – risk

of fire!

– Never use washer fluid which contains paint

thinners or solvents as it can damage the

paintwork.

– If you notice that the insulation on the posi-

tive terminal around the metal housing is

248

Service and care -> Battery (agm battery) for Your Audi Q5 SUV Third Generation (2024-2026)

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