Get Service fluids Guide for Volkswagen Multivan SUV Sixth Generation (2015-2024)

Service fluids and equipment

All service fluids and consumables, e.g. coolant, vehicle batteries and engine oils, are being constantly developed. For

this reason, service fluids and consumables should be replaced by a suitably qualified workshop.

WARNING

If work is performed on the fuel system, fires and serious or fatal injuries can be caused by electrical discharge and

flying sparks.

● Always disconnect the 12-volt vehicle battery.

● Always have a fully functional and tested fire extinguisher to hand.

● Make sure that the vehicle is unlocked when the 12-volt vehicle battery is disconnected as otherwise the anti-

theft alarm will be activated.

WARNING

Service fluids may be toxic. Incorrect use and storage can cause serious or fatal injuries.

● Store service fluids only in the closed original container.

● Never store service fluids in empty food containers, bottles or any other non-original containers as people finding

these containers could drink them.

● Keep children away from all service fluids and consumables.

● Always observe and follow the information and warnings on the service fluid packaging.

● When using products that give off harmful fumes, always work outdoors or in a well-ventilated area.

WARNING

Service fluids and some materials in the engine compartment are easily flammable and can ignite if they come into

contact with hot surfaces, sparks or naked flames. This can lead to a fire and cause serious or fatal injuries.

● Never smoke in the vicinity of the engine compartment.

● Never work in the vicinity of sparks or naked flames.

● Never work in the direct proximity of heating systems, water heaters or any other naked flames.

● Never spill service fluids onto the engine.

● Always have a fully functional and tested fire extinguisher to hand.

NOTICE

Use of the incorrect service fluids can cause serious malfunctions and result in engine damage.

● When refilling or replacing service fluids, ensure that you pour the correct service fluids into the appropriate

openings.

Service fluids leaks are harmful to the environment. For this reason, you should regularly check the ground

underneath your vehicle. If you notice patches of service fluids on the ground, have the vehicle checked by

a suitably qualified workshop. Any spilt service fluids must be disposed of properly.

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Windscreen washer fluid

Fig. 1 In the engine compartment: washer fluid reservoir

cap.

The windscreen washer fluid level should be checked regularly and topped up as necessary.

A filter can be found in the feed throat of the washer fluid reservoir. The strainer keeps larger dirt particles away from

the washer jets when refilling. The filter should only be removed for cleaning. If the filter is damaged or cannot be

found when refilling, dirt particles will reach the system and will block the washer jets.

1. Open the bonnet (→ In the engine compartment).

The washer fluid reservoir is identified by the symbol on the cap→ Fig. 1.

2. Check whether there is enough windscreen washer fluid in the reservoir.

3. To add fluid, mix clear water, but not distilled water, with suitable windscreen washer fluid→ . Observe the

dilution instructions on the packaging.

4. At low outside temperatures, add a special anti-freeze agent so that the fluid cannot freeze→

.

WARNING

If coolant additive or similar unsuitable additives are mixed with the washer fluid, this can result in an oily film on

the window that considerably impairs visibility.

● Use clean, clear water, but not distilled water, with a suitable windscreen washer fluid.

● Add a suitable antifreeze agent to the washer fluid if necessary.

NOTICE

Mixing cleaning agents incorrectly can cause the ingredients to separate and block the washer jets.

● Never use unsuitable cleaning agents.

532

Introduction

Engine oils are matched to the requirements of the engines, the emission purification systems, and the fuel quality.

Due to the operating principle of combustion engines, engine oil always comes into contact with combustion residues

and fuel, which has corresponding effects on the ageing process of the engine oil. The correct engine oil is important

for the function and service life of the engine. A special multigrade high-lubricity oil has been filled at the factory and

this can normally be used as an all-season oil.

Information on warning and indicator lamps that light up can be found in the troubleshooting sections at the end of

the chapter (→ Engine oil).

WARNING

Incorrect handling of engine oil can cause serious burns and other injuries.

● Always wear eye protection when handling engine oil.

● Engine oil is toxic. Always keep engine oil out of the reach of children.

● Store engine oil only in the closed original container. This also applies to used oil until it is disposed of.

● Regular contact with engine oil can damage the skin. Always wash skin that has been in contact with engine oil

thoroughly with water and soap.

● Engine oil becomes extremely hot when the engine is running and can scald skin severely. Always allow the

engine to cool down.

Leaking or spilt engine oil can pollute the environment. Collect any service fluids that escape or are spilled

and dispose of them correctly and with respect for the environment.

533

Engine oil standards

Vehicles with an engine oil sticker

If you need to add engine oil, use an oil with the prescribed engine oil standard and engine oil viscosity→ Fig. 1.

Fig. 1 Sticker for engine oil standard and engine oil

viscosity (illustration).

1

2

Information on the engine oil standard.

Information on the engine oil viscosity.

The sticker with the prescribed standard is located at the front of the engine compartment on the side next to the

1

bonnet release mechanism → Fig. 2

.

Fig. 2 In the engine compartment: Sticker for engine oil

standard and engine oil viscosity (illustration).

1

Sticker.

If the prescribed engine oil → Fig. 1 is used, the engine oil level can be corrected as often as necessary (→ Engine oil).

Vehicles without an engine oil sticker

Information on the prescribed engine oil standard and engine oil viscosity can be obtained from a suitably qualified

workshop. If the engine oil needs to be topped up, use an engine oil with the prescribed engine oil standard and

engine oil viscosity. If the prescribed engine oil is used, the engine oil level can be corrected as often as necessary, as

follows (→ Engine oil).

534

If no engine oil is available according to the prescribed standard, in an emergency you may add a maximum of 0.5 l

(0.5 qt) once of an oil that corresponds to the following deviating standards until the next regular oil change:

—Diesel engines: Standards VW 507 00 and ACEA C3, ACEA C4 or API CK-4. All viscosity classes of these standards

are permitted.

We recommend having the work carried out by a correspondingly qualified workshop.

NOTICE

Using engine oils that are not approved under the respective standard can cause engine damage.

● When refilling, use only engine oils that satisfy the quality requirements of the relevant applicable standard.

● In an emergency, you may top up with a maximum of 0.5 l(0.5 qt) of engine oil that does not comply with the

standard.

Changing engine oil

The engine oil must be changed regularly and in accordance with the specified service interval.

Additives in the engine oil can cause new engine oil to discolour quickly. This is normal and does not mean that the

engine oil should be changed more frequently.

WARNING

Engine oil can cause damage to the environment, serious burns or fire if engine oil changes are not performed with

due care. This can result in serious or fatal injuries.

● Always allow the engine to cool down completely before changing the engine oil.

● Always wear eye protection when changing engine oil.

● Keep your arms horizontal when unscrewing the oil drain plug with your fingers to prevent the emerging oil from

running down your arm.

● Use a suitable container when draining the used oil. It must be at least large enough to hold the entire filling

quantity of engine oil.

WARNING

Engine oil is toxic. Serious or fatal injuries can be caused by contact with engine oil, particularly if engine oil is

swallowed.

● Seek immediate medical attention after swallowing engine oil.

● Seek medical attention if you experience health problems after working with engine oil.

● Always keep engine oil out of the reach of children and only in the closed original container. This also applies to

used oil until it is disposed of.

● Never store engine oil in empty food containers, bottles or any other non-original containers as people finding

these containers may then drink the engine oil.

● Avoid regular contact with engine oil to prevent damage to the skin.

● Protect your skin, face and especially your eyes when working with engine oil.

● Do not eat, drink or smoke when working with engine oil.

● Wash your skin with soap and water after working with engine oil.

NOTICE

Oil and filter changes require special tools, expert knowledge and correct disposal of old oil. Vehicle damage can

result if this work is not performed correctly.

● You should always have the engine oil and filter changes performed by a suitably qualified workshop.

Dispose of engine oil in an environmentally responsible way and only at a collection point for old oil, e.g.

recycling centre or specialist retailer.

535

Engine oil consumption

Engine oil consumption can vary from engine to engine and can change during the working life of an engine.

The vehicle may consume up to 1 l of engine oil per 2,000 km, depending on how you drive and the conditions in

which the vehicle is used. In new vehicles, consumption is likely to be higher for the first 5,000 km. The engine oil

level must therefore be checked at regular intervals, preferably when refuelling and before long trips.

When the engine is working hard, the engine oil level must be in the upper permissible area (→ Engine oil), for

instance during extended motorway trips in summer or when climbing mountain passes

536

Checking the engine oil level and refilling engine oil

Fig. 1 Oil dipstick with level marking.

A

B

C

Engine oil level too high – observe the messages on the instrument cluster display or seek expert assistance.

Engine oil level within normal range.

Engine oil level too low – follow the messages in the instrument cluster display or add engine oil, if necessary.

Fig. 2 In the engine compartment: engine oil filler opening

cap (illustration).

Carry out the steps in the specified order→

, →

:

1. With the engine at operating temperature, park the vehicle on a level surface to ensure that the engine oil

reading is correct.

2. Switch off the engine and wait at least 5 minutes for the engine oil to flow back into the sump.

3. Open the bonnet (→ In the engine compartment).

4. Identify the engine oil filler cap and oil dipstick. The oil filler neck can be recognised by the → Fig. 2 symbol

on the cap and the oil dipstick by its coloured handle. If you cannot find the cap and oil dipstick, please contact

a suitably qualified workshop.

5. Pull the dipstick out of the guide tube and wipe it off with a clean cloth.

6. Re-insert the oil dipstick into the guide tube as far as it will go. If there is a marking on the oil dipstick, this

marking must fit in the corresponding groove at the top end of the guide tube when inserting.

537

7. Pull out the oil dipstick again and read the engine oil level on the dipstick as follows→ Fig. 1:

A

Engine oil level too high. Observe the messages on the instrument cluster display or seek expert assistance

as necessary →

.

B

Engine oil level within normal range. Engine oil can be filled to the upper limit of this range, e.g. when the

engine is subjected to high loads . Continue to step 8 or 16.

C

Engine oil level is too low. Where applicable, follow any messages that are shown on the instrument cluster

display and make sure you add engine oil. Continue to step 8.

8. After reading off the engine oil level, push the oil dipstick back into the guide tube as far as it will go.

9. Unscrew the engine oil filler opening cap→ Fig. 2.

10. Gradually add engine oil in small quantities, no more than 0.5 l(0.5 qt) in total, or follow the recommendation in

the instrument cluster. The use of approved engine oils in accordance with the relevant VW standard is

recommended.

11. In order to avoid overfilling, wait for at least 1 minute after each refill step to allow the engine oil to flow into

the oil sump up to the marking on the engine oil dipstick.

12. Read the engine oil level from the dipstick again before refilling with a further small quantity of engine oil.

Never overfill with engine oil →

.

B

13. After filling, the engine oil level should be in the middle of the area→ Fig. 1

A

. The engine oil level must not

be in area → Fig. 1

→

.

A

14. If too much engine oil has been added unintentionally and the engine oil level is in area→ Fig. 1

start the engine. Seek expert assistance.

, do not

15. After refilling, screw the engine oil filler cap back on.

16. Insert the oil dipstick into the guide tube as far as it will go. If there is a marking on the upper end of the oil

dipstick, this marking must fit in the corresponding groove at the top end of the guide tube when inserting.

17. Close the bonnet (→ In the engine compartment).

WARNING

Engine oil can ignite if it comes into contact with hot engine components. It can cause fires, burns and other serious

injuries.

● Always ensure that the engine oil filler cap is securely tightened after refilling, and that the dipstick is properly

inserted back into the guide tube. This will prevent the engine oil from draining out on to hot engine components

when the engine is running.

● If engine oil is spilt on cold engine parts it can heat up and ignite when the engine is running.

NOTICE

● If the engine oil level is in area→ Fig. 1

A

, do not start the engine. Seek expert assistance.

● When refilling service fluids, ensure that you pour the correct service fluids into the correct openings. The use of

incorrect service fluids could result in serious malfunctions and engine damage.

Troubleshooting

Engine oil pressure too low

The warning lamp flashes red. A message is shown on the instrument cluster display.

Do not drive on! The engine could otherwise be damaged.

538

1. Stop the vehicle as soon as possible and when safe to do so.

2. Switch off the engine.

3. Check the engine oil level (→ Engine oil).

4. Do not drive on or leave the engine running if the warning lamp is flashing even when the engine oil level is

correct. The engine could otherwise be damaged. Seek expert assistance.

Engine oil level very low

The warning lamp flashes red. A message is shown on the instrument cluster display.

Do not drive on! The engine could otherwise be damaged.

1. Stop the vehicle as soon as possible and when safe to do so.

2. Switch off the engine.

3. Check the engine oil level (→ Engine oil).

4. If required, top up the engine oil gradually in small quantities, using no more than 0.5 (l0.5 qt) in total.

5. Do not drive on or leave the engine running if the warning lamp is lit even though the engine oil level is correct.

The engine could otherwise be damaged. Seek expert assistance.

Engine oil level too low

The indicator lamp lights up yellow. A message is shown on the instrument cluster display.

1. Stop the vehicle as soon as possible and when safe to do so.

2. Switch off the engine.

3. Check the engine oil level (→ Engine oil).

4. If required, top up the engine oil gradually in small quantities, using no more than 0.5 (l0.5 qt) in total.

5. Do not drive on or leave the engine running if the indicator lamp is lit even though the engine oil level is correct.

The engine could otherwise be damaged. Seek expert assistance.

Engine oil level too high

The indicator lamp lights up yellow. A message is shown on the instrument cluster display.

1. Stop the vehicle as soon as possible and when safe to do so.

2. Switch off the engine.

3. Check the engine oil level (→ Engine oil).

4. If the engine oil level is too high, do not drive on or allow the engine to run. The engine could otherwise be

damaged. Seek expert assistance.

or

Fault in the engine oil system

The indicator lamp flashes yellow. A message is shown on the instrument cluster display.

1. Seek expert assistance.

Introduction

539

Do not work on the cooling system unless you are familiar with the task, aware of the applicable safety procedures

and have the correct equipment, service fluids and suitable tools. Failing to carry out work correctly can cause serious

injuries → . Have all necessary work carried out by a suitably qualified workshop.

Information on warning and indicator lamps that light up can be found in the troubleshooting sections at the end of

the chapter (→ Coolant).

WARNING

Coolant is toxic. Serious or fatal injuries can be caused by contact with coolant, particularly if coolant is swallowed.

● Seek immediate medical attention after swallowing coolant.

● Seek medical attention if you experience health problems after working with coolant.

● Always keep coolant out of the reach of children and only in the closed original container.

● Never store coolant in empty food containers, bottles or any other non-original containers as people finding these

containers may then drink the coolant.

● Avoid regular contact with coolant to prevent damage to the skin.

● Protect your skin, face and especially your eyes when working with coolant.

● Do not eat, drink or smoke when working with coolant.

● Wash your skin with soap and water after working with coolant.

WARNING

Coolant can freeze at extremely cold outside temperatures, causing the vehicle to break down. This may mean that

heating in the vehicle no longer works. Vehicle occupants with inadequate winter clothing could then freeze to

death.

● Make sure that the coolant additive is always adapted correspondingly to the ambient temperature.

● Use only coolant additives that have been approved by the manufacturer.

Coolant and coolant additives can pollute the environment. Spilt service fluids must be collected then

disposed of properly and in an environmentally responsible way.

Coolant specification

The cooling system is filled at the factory with a mixture of specially prepared water and at least 40% coolant additive

G12evo (TL 774-L).

The proportion of coolant additive mustalways be at least 40% to protect the cooling system. If greater frost

protection is required in very cold climates, the proportion of anti-freeze additive can be increased. However, the

percentage of coolant additive should not exceed 55 %, as this would reduce the frost protection and the cooling

effect.

The coolant additive is dyed purple. The mixture of water and coolant additive provides anti-freeze protection down

to -25°C (-13°F), protects the alloy parts in the cooling system against corrosion, prevents limescale deposits and

significantly increases the boiling point of the coolant.

When refilling the coolant, a mixture of distilled water and at least 40% G12evo coolant additive must be used in

order to obtain the optimum corrosion protection →

.

WARNING

Insufficient anti-freeze in the coolant system can cause the engine to break down and cause serious injuries.

● The amount of correct coolant additive used must be sufficient for the lowest ambient temperature that you

expect the vehicle to be exposed to.

● Coolant can freeze at extremely cold outside temperatures, causing the vehicle to break down. Vehicle occupants

with inadequate winter clothing could then freeze to death as the heating will also no longer function.

NOTICE

540

If the liquid in the coolant expansion tank is not purple, the correct coolant has been mixed with another, unsuitable

coolant additive. Failure to observe this warning can result in serious malfunctions or damage to the engine and

cooling system.

● In this case, have the coolant changed immediately.

● Never mix genuine coolant additives with other coolants that have not been approved.

Coolant and coolant additives can pollute the environment. Collect any service fluids that escape or are

spilled and dispose of them correctly and with respect for the environment.

Checking the coolant level and refilling coolant

Preparations

1. Park the vehicle on a firm and level surface.

2. Allow the engine to cool down →

3. Open the bonnet.

.

The coolant expansion tank is identified by the red symbol on the cap→ Fig. 1.

Fig. 1 In the engine compartment: coolant expansion tank

cap

WARNING

Escaping hot steam or hot coolant and hot components can cause serious burns.

● Never open the bonnet if you can see or hear steam or coolant coming out of the engine compartment.

● Always wait until you can no longer see or hear steam or coolant coming from the engine compartment.

WARNING

The cooling system is under pressure when the engine is hot. If due care is not taken when opening the cap, coolant

can spray out and cause serious burns or fatal injuries.

● Never open the cap of the coolant expansion tank when the engine is hot.

● Always protect your face, hands and arms from hot coolant or steam with a large, thick cloth if you have to open

the cap of the coolant expansion tank.

● Turn the cap of the coolant expansion tank slowly and very carefully anticlockwise while exerting slight

downwards pressure on the cap.

Checking the coolant level

541

Fig. 2 In the engine compartment: mark on the coolant

expansion tank (illustration).

The coolant may be above the marked area when a new vehicle is delivered or after repairs to the cooling system.

This is normal. The coolant does not have to be sucked off.

The coolant level cannot be checked accurately in all models as the coolant expansion tank may be partially

concealed. If the coolant level cannot be read exactly, please seek assistance from a suitably qualified workshop.

1. When the engine is cold, check the coolant level at the side markings of the coolant expansion tank→ Fig. 2.

The coolant level must be between the markings.

2. Add coolant if the fluid level in the coolant expansion tank is below the minimum marking “min”.

When the engine is warm, the engine coolant level may be slightly above the upper mark.

3. Do not add coolant if there is no longer any coolant visible in the coolant expansion tank→

.

Refilling coolant

1. Unscrew the lid carefully →

.

2. Only refill with new coolant that is compliant with the specifications (→ Coolant).

If in an emergency you do not have access to coolant in the required specification, add only distilled water

initially. Then have the correct mixture ratio with the coolant additive restored by a correspondingly qualified

workshop as soon as possible.

3. Add coolant up to the upper level marking. After adding the coolant, the coolant level must be between the

markings on the coolant expansion tank → Fig. 1.

4. Close the cap tightly.

5. Check the coolant level after one day. If the level in the coolant expansion tank again drops below the “min”

mark, go to a suitably qualified workshop and have the cooling system checked.

NOTICE

Coolant expands when it is heated. If coolant is topped up above the marked area, excess coolant may escape and

cause damage to the vehicle.

● Do not fill coolant above the top edge of the marked area of the coolant expansion tank.

NOTICE

If there is no longer any coolant in the coolant expansion tank, air may have entered the cooling system. This could

cause damage to the engine.

542

● Do not carry on driving.

● Do not add any coolant.

● Seek expert assistance.

NOTICE

Using water other than distilled water can cause corrosion in the engine due to the chemical components contained

in it. This can lead to engine failure.

● Use only distilled water for refilling.

● Have the fluid in the cooling system replaced completely by a suitably qualified workshop if you have not added

distilled water.

NOTICE

Use of the incorrect service fluids can cause serious malfunctions and result in engine damage.

● When refilling or replacing service fluids, ensure that you pour the correct service fluids into the appropriate

openings.

Troubleshooting

Coolant

The warning lamp flashes red. The engine coolant temperature is too high or the coolant level is too low.

Do not drive on! The engine could otherwise be damaged.

1. Stop the vehicle as soon as possible and when safe to do so (→ Parking).

2. Switch off the engine.

3. Allow the engine to cool down.

4. Check the coolant level at the coolant expansion tank (→ Coolant).

5. Do not drive on or leave the engine running if the warning lamp does not go out even though the coolant level

is correct.

6. Seek expert assistance.

543

Emergency top-up of the cooling system

The vehicle must not be moved if large quantities of coolant have been lost. Failure to observe this can lead to engine

damage.

Work on the cooling system should always be carried out by a correspondingly qualified workshop.

The cooling system can be topped up if it is not possible to visit a correspondingly qualified workshop.

This description of emergency filling applies only to the engine codesDMZA, DNAA, DNAB and DNAC.

You can find information abut the engine code here (→ Type plate).

Requirements when filling the cooling system

✓ The vehicle must be stopped on a firm and level surface.

✓ The engine must have cooled down (→ Coolant).

✓ The cooling system is not damaged(water loss).

✓ A tool that is not included in the vehicle toolkit.

✓ A sufficient quantity of coolant is available, in an emergency water filtered through a clean cloth.

Emergency filling of cooling system

The actions should only be carried out in the specified order:

1. Open the bonnet (→ In the engine compartment)

2. Open the coolant expansion tank.

3. Fill the cooling system up to the upper seam on the coolant expansion tank until the coolant level remains

constant (→ Coolant).

4. Wait around 5 minutes and add more coolant if necessary.

5. Switch on the ignition.

6. The automatic coolant bleeding process begins. This process takes around 5 minutes.

7. When automatic coolant bleeding is complete, refill the coolant up to the seam on the coolant expansion tank

(→ Coolant).

8. Start the engine and switch off the air conditioning system (→ Manual air conditioning system).

9. Drive the vehicle at an engine speed above 2,000 rpm for around 30 minutes to get the engine to operating

temperature.

10. Switch off the vehicle and allow it to cool down. Once it has done so, adjust the coolant level to around 3 cm

(around 1 in) above the upper marking. Set the air conditioning system to your preferred temperature.

Have the cooling system checked, repaired and filled with engine coolant of the correct specification by a

correspondingly qualified workshop immediately.

544

Introduction

Brake fluid will gradually absorb water from the surrounding air. The brake system will be damaged if there is too

much water in the brake fluid. The boiling point of the brake fluid is also considerably reduced by the water content.

Heavy use of the brakes may cause a vapour lock in the brake system if the water content is too high. Vapour locks

reduce levels of braking power, considerably increase braking distance and can even cause the brake system to fail

completely. Your own safety and that of other road users depends on having a brake system that functions properly

at all times.

WARNING

Brake fluid is toxic.

● In order to reduce the risk of poisoning, never use bottles or other containers to store brake fluid. There is always

a risk of someone drinking from such containers, even if they are labelled appropriately.

● Always store brake fluid in its original sealed container and out of the reach of children.

NOTICE

Brake fluid that has leaked or been spilt can damage the vehicle paintwork, plastic parts and tyres.

● Wipe off brake fluid that has leaked or been spilled immediately from all parts of the vehicle.

Brake fluid can pollute the environment. Any spilt service fluids must be cleaned up and disposed of

properly.

545

Brake fluid specification

Volkswagen Commercial Vehicles has developed a brake fluid that has been optimised for the brake system in the

vehicle. To ensure the best possible operation of the brake system, Volkswagen Commercial Vehicles expressly

recommends the use of brake fluid compliant with VW standard 501 14.

Before using a particular brake fluid, check that the specifications printed on the container correspond to the vehicle

requirements.

Brake fluid that is compliant with VW standard 501 14 is available from Volkswagen Commercial Vehicles

dealerships.

If this brake fluid is not available and it is necessary to use another high-quality brake fluid instead, brake fluid that is

compliant with DIN ISO 4925 CLASS 6 or US standard FMVSS 116 DOT 4 can be used.

Not all brake fluids that are compliant withDIN ISO 4925 CLASS 6 or US standard FMVSS 116 DOT 4 have the same

chemical composition. Some of these brake fluids may contain chemicals that can damage or destroy brake system

components over time.

Brake fluid that is compliant with VW standard 501 14 fulfils the requirements ofDIN ISO 4925 CLASS 6 or

US standard FMVSS 116 DOT 4.

546

Checking the brake fluid

Preparations

1. Park the vehicle on a firm and level surface.

2. Open the bonnet.

Check the brake fluid level

Fig. 1 In the engine compartment: brake fluid reservoir

cap.

The brake fluid reservoir is identifiable by the cap→ Fig. 1.

The brake fluid level cannot be checked accurately in all models as a flap or engine components may partially conceal

the brake fluid container. If the brake fluid level cannot be read exactly, please seek assistance from a suitably

qualified workshop.

The brake fluid level must always be between the MIN and MAX markings on the brake fluid reservoir→

.

The brake fluid level drops slightly when the vehicle is being used as the brake pads wear and the brakes are

automatically adjusted.

Brake fluid change

Have the brake fluid changed regularly. Information on the change interval for the brake fluid can be obtained from a

correspondingly qualified workshop. Only brake fluid that conforms with the required specification should be used.

WARNING

Brake failure or reduced braking efficiency can be caused by the brake fluid level being too low or by brake fluid that

is too old or unsuitable.

● Have the brake system and brake fluid level checked or the brake fluid changed on a regular basis!

● The refilled brake fluid must be new.

● Make sure that the correct brake fluid is used. Only use brake fluid that is explicitly compliant with VW standard

501 14. Any other brake fluid or a low-quality one can affect the functioning of the brakes and reduce their

effectiveness.

● If you do not have any brake fluid that is compliant with VW standard 501 14, use a high-quality brake fluid

compliant with DIN ISO 4925 CLASS 6 or the US standard FMVSS 116 DOT 4, but only in exceptional

circumstances.

547

Troubleshooting

Brake fluid level

The warning lamp lights up red. The brake fluid level is too low.

Do not drive on! This can result in brake failure.

1. Stop the vehicle as soon as possible and when safe to do so (→ Parking).

2. Check the brake fluid level.

3. Seek expert assistance if the brake fluid level is too low.

548

Introduction

The 12-volt vehicle battery is a component of the electrical system in the vehicle.

Never carry out any work on the electrical system if you are not familiar with the necessary procedures and the

general safety requirements and only unsuitable tools are available → . Otherwise, have all work carried out by a

correspondingly qualified workshop if necessary. Serious injuries can be caused if work is carried out incorrectly.

Information on warning and indicator lamps that light up can be found in the troubleshooting sections at the end of

the chapter (→ 12-volt vehicle battery).

Number and location of the 12-volt vehicle battery

The 12-volt vehicle battery is located in the engine compartment. Depending on the vehicle equipment level, the

vehicle could also have two 12-volt vehicle batteries, while camper vans can have three 12-volt vehicle batteries. The

second 12-volt vehicle battery is located under the left front seat; the third battery in camper vans is located in the

wardrobe at the rear left of the vehicle.

Explanation of the warnings on the 12-volt vehicle battery

Always wear eye protection!

Electrolyte is very corrosive and caustic. Always wear protective gloves and eye protection!

No fires, sparks, naked lights or smoking!

A highly explosive mixture of gases is given off when the vehicle battery is charging!

Always keep children away from electrolyte and the vehicle battery.

Always observe the owner's manual!

WARNING

Any work on the 12-volt vehicle battery and the electrical system can cause serious chemical burns, fire or electric

shocks. Always read the following warnings and safety information before carrying out any kind of work:

● Switch off the ignition and all electrical consumers before carrying out any work on the 12-volt vehicle battery

and also disconnect the negative cable from the 12-volt vehicle battery.

● Children should always be kept away from electrolyte and the 12-volt vehicle battery.

● Always wear eye protection and protective gloves.

● Electrolyte is very aggressive. It can burn the skin and can cause blindness. When working with the 12-volt

vehicle battery, ensure that your hands, arms and face in particular are protected from acid spillage.

● Never smoke and work near naked flames or sparks.

● When handling cables and electrical equipment, avoid generating sparks and electrostatic discharge.

● Never short circuit battery terminals.

● Never use a damaged 12-volt vehicle battery. The 12-volt vehicle battery can explode. Replace a damaged 12-

volt vehicle battery immediately.

NOTICE

In vehicles with a second battery under the driver’s seat or a third battery in the luggage compartment, you must

ensure that the breather hose is connected properly to the 12-volt vehicle battery.

NOTICE

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The 12-volt vehicle battery housing can be damaged by ultraviolet radiation.

● Do not expose the 12-volt vehicle battery to direct sunlight for an extended time.

NOTICE

The 12-volt vehicle battery can “freeze” and be destroyed if the outside temperature is very low and the vehicle is

stationary for a long time.

● Protect the 12-volt vehicle battery against frost if the vehicle is left standing for extended periods.

When you start the engine after the 12-volt vehicle battery has been totally discharged or changed, you may

find that system settings e.g. time, date, personal convenience settings and programming have been changed

or deleted. Check and correct the settings as necessary once the 12-volt vehicle battery has been sufficiently

charged.

Checking the electrolyte level of the 12-volt vehicle battery

The electrolyte level of the 12-volt vehicle battery should be checked regularly in high-mileage vehicles, in hot

countries and in older 12-volt vehicle batteries. The 12-volt vehicle battery is otherwise maintenance-free.

Preparations

1. Preparing the vehicle for working in the engine compartment (→ In the engine compartment).

2. Open the bonnet (→ In the engine compartment).

Checking the electrolyte level (12-volt vehicle batteries with battery window)

Fig. 1 Battery window on the top of the 12-volt vehicle

battery (general guide).

Depending on equipment, it may be necessary to remove an additional bracket in order to view the battery window.

An additional tool that is not included in the vehicle toolkit is required for this purpose.

Ensure that enough light is available for you to clearly see the colour indicator in the round window on the top of the

12-volt vehicle battery → Fig. 1.

The colour indicator in the round window changes according to the electrolyte level in the 12-volt vehicle battery.

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Light yellow or without colour

The electrolyte level of the 12-volt vehicle battery is too low. The 12-volt vehicle battery should be checked

and replaced by a qualified workshop if necessary.

Black

The electrolyte level of the 12-volt vehicle battery is correct.

For technical reasons, you cannot check the electrolyte level of 12-volt vehicle batteries marked with . Go to a

correspondingly qualified workshop to have the 12-volt vehicle battery checked.

WARNING

Any work on the 12-volt vehicle battery can cause serious chemical burns, explosions and electric shocks.

● Always wear eye protection and protective gloves.

● Never use naked flames or glowing objects as a light source.

● Electrolyte is very aggressive. It can burn the skin and can cause blindness. When working with the 12-volt

vehicle battery, ensure that your hands, arms and face in particular are protected from acid spillage.

● Never tilt the 12-volt vehicle battery. Electrolyte may spill out of the battery vents and cause chemical burns.

● Never open a 12-volt vehicle battery.

● If acid is sprayed into your eye or onto your skin, rinse the affected area immediately for several minutes with

cold water. Then consult a doctor immediately.

● If electrolyte is swallowed, consult a doctor immediately.

Charging, replacing, disconnecting and connecting the 12-volt vehicle battery

1. If you suspect that the 12-volt vehicle battery is damaged or faulty, go to a suitably qualified workshop and

have the 12-volt vehicle battery checked.

Charging the 12-volt vehicle battery

The 12-volt vehicle battery should always be charged by a correspondingly qualified workshop, as the technology

used in factory-fitted 12-volt vehicle batteries requires voltage-limited charging →

.

Replacing the 12-volt vehicle battery

The 12-volt vehicle battery has been developed to suit the conditions of its location and has special safety features.

If a 12-volt vehicle battery has to be replaced, the replacement part must be installed by a workshop qualified to do

this. For component information on size and the required maintenance, capacity and safety features, please contact a

correspondingly qualified workshop, which must have the necessary technical documentation and equipment. The

ventilation opening of the 12-volt vehicle battery must always be on the negative terminal side. The ventilation

opening on the positive terminal side must always be sealed.

Only maintenance-free 12-volt vehicle batteries compliant with the standards TL 825 06 and VW 7 50 73 should be

used. These standards must be dated October 2014 or later.

The 12-volt vehicle battery must always be replaced by a workshop qualified to do this, as the vehicle electronics

must be adapted as part of the replacement process. In addition, the battery parameters for functional safety were

determined only with the original equipment battery. Only correspondingly qualified workshops have the technology

required to carry out this adjustment and also the correct replacement batteries. The use of unsuitable batteries can

render the type approval invalid.

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Disconnecting the 12-volt vehicle battery

Please note the following if the vehicle battery has to be disconnected from the electrical system in the vehicle:

1. Switch off all electrical consumers and the ignition.

2. Unlock the vehicle before disconnecting the battery in order to avoid triggering the anti-theft alarm(if fitted).

3. First disconnect the negative cable and then the positive cable→

.

Connecting the 12-volt vehicle battery

1. Switch off all electrical consumers and the ignition before reconnecting the vehicle battery.

2. First connect the positive cable and then the negative cable→

.

Various indicator lamps may light up after the 12-volt vehicle battery has been connected and the ignition is

switched on. They will go out if you drive a short distance at a speed of 15 km/h to 20 km/h (10 – 12 mph). If the

indicator lamps continue to light up, have the vehicle checked by a suitably qualified workshop.

If the 12-volt vehicle battery was disconnected for an extended period, the system may not able to calculate or

correctly display the time when the next service is due . Observe the maximum permissible service intervals .

Automatic switch-off for electrical consumers

The vehicle electrical system cannot always prevent the 12-volt vehicle battery from discharging.

—For example, when the ignition is switched on for an extended period with the engine off, or when the side or

parking lights are on when the vehicle is parked for an extended period.

To prevent the 12-volt vehicle battery from discharging, the intelligent vehicle electrics management system

automatically implements certain measures when the 12-volt vehicle battery is subjected to heavy loads:

—The idling speed is increased so that the alternator provides more electricity.

—The performance of large electrical consumers may be reduced or they may be switched off completely.

—The power supply to the 12-volt socket and the cigarette lighter may be interrupted temporarily while the engine

is being started.

12-volt vehicle battery is discharged

The 12-volt vehicle battery will discharge if you use electrical consumers when the engine is switched off.

WARNING

Incorrectly securing the battery and using incorrect 12-volt vehicle batteries can cause short circuits, fire and

serious injuries.

● Always use maintenance-free and leak-proof 12-volt vehicle batteries that have the same properties,

specifications and dimensions as the factory-fitted 12-volt vehicle battery.

WARNING

A highly explosive mixture of gases is given off when the 12-volt vehicle battery is being charged.

● Charge 12-volt vehicle batteries only in well-ventilated spaces.

● Never charge a 12-volt vehicle battery which is frozen or has been frozen. Discharged 12-volt vehicle batteries

can even freeze at temperatures of approx. 0°C (+32°F).

● The 12-volt vehicle battery must be replaced if it has ever frozen.

Troubleshooting

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Service fluids for Your Volkswagen Multivan SUV Sixth Generation (2015-2024)

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