Volvo S90 Twin Engine (2020 year). Manual in english - page 37

MAINTENANCE AND SERVICE

}}

* Option/accessory.

631

Fuses in cargo area

Fuses in the cargo area protect, amongst
other things, power seats

*

, airbags and seat-

belt tensioners.

||

MAINTENANCE AND SERVICE

632

The central electrical unit is located on the right-hand side.

On the inside of the cover there are tweezers
that facilitate the procedure for the removal
and fitting of fuses.

The 

fuse box in the engine compartment

also provides space for several spare fuses.

MAINTENANCE AND SERVICE

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* Option/accessory.

633

Positions

On the inside of the cover is a label that shows
the location of the fuses.

Function

Ampere

Type

Rear window defroster

30

MCase

A

Central electronic module

40

MCase

A

Compressor for air suspension

*

40

MCase

A

Lock motor for backrest on rear right-hand side

15

MCase

A

–

–

MCase

A

Lock motor for backrest on rear left-hand side

15

MCase

A

Door module right-hand side rear

B

20

MCase

A

Control module for reduction of nitrous oxides (diesel)

30

MCase

A

Power operated boot lid

*

25

MCase

A

Electrically operated front passenger seat

*

Door module right-hand side front

20

MCase

A

Towbar control module

*

40

MCase

A

Seatbelt pretensioner module, right-hand side

40

MCase

A

Internal relay coils

5

Micro

Control module for reduction of nitrous oxides (diesel)

15

Micro

||

MAINTENANCE AND SERVICE

* Option/accessory.

634

Function

Ampere

Type

Door module left-hand side rear

20

Micro

Alcohol lock

*

, USB hub/accessory port

5

Micro

Enhanced accessory module

5

Micro

Towbar control module

*

25

MCase

A

Accessory module

40

MCase

A

Power driver seat

*

Door module left-hand side front

20

MCase

A

Seatbelt pretensioner module, left-hand side

40

MCase

A

Parking camera

*

5

Micro

–

–

Micro

–

–

Micro

–

–

Micro

Supply when the ignition is switched on

10

Micro

–

–

Micro

–

–

Micro

Seat heating left-hand side rear

*

15

Micro

–

–

Micro

MAINTENANCE AND SERVICE

* Option/accessory.

635

Function

Ampere

Type

Blind Spot Information (BLIS)

*

: control module, exterior reversing sound

5

Micro

–

–

Micro

Seatbelt pretensioner modules

5

Micro

Actuator for exhaust gases (petrol, certain engine variants)

5

Micro

–

–

Micro

–

–

Micro

Seat heating right-hand side rear

*

15

Micro

–

–

MCase

A

A

This type of fuse should be replaced by a workshop. An authorised Volvo workshop is recommended.

B

Applicable only to cars with hybrid motors or a 48V support battery.

Related information

•

Fuses and central electrical units (p. 617)

•

Replacing a fuse (p. 617)

MAINTENANCE AND SERVICE

* Option/accessory.

636

Cleaning the interior

Only use cleaning agents and car care prod-
ucts recommended by Volvo. Clean regularly,
and deal with stains straight away. Vacuum-
ing is important prior to using cleaning
agents.

IMPORTANT

•

Certain items of coloured clothing (e.g.
dark jeans and suede garments) may
stain the upholstery. If this occurs, it is
important to clean and treat these
parts of the upholstery as soon as pos-
sible.

•

Never use strong solvents such as
washer fluid, pure petrol or white spirit
or concentrated alcohol to clean the
interior, since this may damage the
upholstery as well as other interior
materials.

•

Never spray the cleaning agent directly
onto components that have electrical
buttons and controls. Wipe them
instead using a moistened cloth con-
taining the cleaning agent.

•

Sharp objects and Velcro may damage
the fabric upholstery.

•

Only use cleaning agents on the type
of material for which they were
intended.

Related information

•

Cleaning the centre display (p. 636)

•

Cleaning fabric upholstery and headlining
(p. 638)

•

Cleaning the seatbelts (p. 638)

•

Cleaning floor mats and inlay mats
(p. 638)

•

Cleaning leather upholstery

*

 (p. 639)

•

Cleaning the leather steering wheel
(p. 640)

•

Cleaning interior plastic, metal and wood
parts (p. 640)

Cleaning the centre display

Dirt, stains and grease from fingers can affect
the centre display's performance and reada-
bility. Clean the screen frequently with a
microfibre cloth.

1. Turn off the centre display with a long

press on the home button.

2. Wipe the screen with the microfibre cloth

supplied or use another microfibre cloth of
equivalent quality. Wipe the screen with a
clean and dry microfibre cloth using small
circular movements. If necessary, lightly
moisten the microfibre cloth with clean
water.

3. Activate the display with a short press on

the home button.

MAINTENANCE AND SERVICE

* Option/accessory.

637

IMPORTANT

The microfibre cloth used to clean the cen-
tre display must be free from sand and dirt.

IMPORTANT

When cleaning the centre display, only use
gentle pressure on the screen. Heavy pres-
sure can damage the screen.

IMPORTANT

Do not spray any liquid or caustic chemi-
cals directly on the centre display. Do not
use window cleaning agent, other cleaning
agents, aerosol spray, solvents, alcohol,
ammonia or cleaning agent containing
abrasive.

Never use abrasive cloths, paper towels or
tissue paper, since they may scratch the
centre display.

Related information

•

Cleaning the interior (p. 636)

•

Cleaning fabric upholstery and headlining
(p. 638)

•

Cleaning the seatbelts (p. 638)

•

Cleaning floor mats and inlay mats
(p. 638)

•

Cleaning leather upholstery

*

 (p. 639)

•

Cleaning the leather steering wheel
(p. 640)

•

Cleaning interior plastic, metal and wood
parts (p. 640)

Cleaning the head up display

*

Gently wipe the display's cover glass with a
clean and dry microfibre cloth. If necessary,
lightly moisten the microfibre cloth.

Never use strong stain removers. A special
cleaning agent available from Volvo dealers
can be used for more difficult cleaning.

Related information

•

Activating and deactivating the head-up
display

*

 (p. 142)

•

Head-up display

*

 (p. 140)

MAINTENANCE AND SERVICE

* Option/accessory.

638

Cleaning fabric upholstery and

headlining

Only use cleaning agents and car care prod-
ucts recommended by Volvo. Clean regularly,
and deal with stains straight away. Vacuum-
ing is important prior to using cleaning
agents.

When you need to clean the textile upholstery
or headliner, never scrape or rub a stain as this
may destroy the fabric. Nor should you ever
use stain removing agents, as this risks discol-
oration of the fabric.

Related information

•

Cleaning the interior (p. 636)

•

Cleaning the centre display (p. 636)

•

Cleaning the seatbelts (p. 638)

•

Cleaning floor mats and inlay mats
(p. 638)

•

Cleaning leather upholstery

*

 (p. 639)

•

Cleaning the leather steering wheel
(p. 640)

•

Cleaning interior plastic, metal and wood
parts (p. 640)

Cleaning the seatbelts

Only use cleaning agents and car care prod-
ucts recommended by Volvo. Clean regularly,
and deal with stains straight away. Vacuum-
ing is important prior to using cleaning
agents.

Use water and a synthetic detergent. A special
textile cleaning agent is available from Volvo
retailers. Ensure that the seatbelt is dry before
allowing it to retract.

Related information

•

Cleaning the interior (p. 636)

•

Cleaning the centre display (p. 636)

•

Cleaning fabric upholstery and headlining
(p. 638)

•

Cleaning floor mats and inlay mats
(p. 638)

•

Cleaning leather upholstery

*

 (p. 639)

•

Cleaning the leather steering wheel
(p. 640)

•

Cleaning interior plastic, metal and wood
parts (p. 640)

Cleaning floor mats and inlay mats

Only use cleaning agents and car care prod-
ucts recommended by Volvo. Clean regularly,
and deal with stains straight away. Vacuum-
ing is important prior to using cleaning
agents.

Remove inlaid carpets for separate cleaning of
the floor carpet and the inlaid carpets. Each
inlay mat is secured with pins.

1. Remove the inlay mat by taking hold of

the inlay mat at each pin and lifting the
mat straight up.

2. Use a vacuum cleaner to remove dust and

dirt.

NOTE

The inlay mats must not be swung around
without care or hit against objects to
remove dirt since this can crack the inlay
mats.

3. A special textile cleaner is recommended

for stains on the floor mat after vacuum-
ing. Floor mats should be cleaned with
agents recommended by Volvo retailers.

4. After cleaning, fit the inlay mat in place by

pressing it in at each pin.

MAINTENANCE AND SERVICE

* Option/accessory.

639

WARNING

Only use one inlaid mat at each seat, and

check before setting off that the mat by the

driver's seat is firmly affixed and secured in

the pins so that it does not get caught

adjacent to and under the pedals.

Related information

•

Cleaning the interior (p. 636)

•

Cleaning the centre display (p. 636)

•

Cleaning fabric upholstery and headlining
(p. 638)

•

Cleaning the seatbelts (p. 638)

•

Cleaning leather upholstery

*

 (p. 639)

•

Cleaning the leather steering wheel
(p. 640)

•

Cleaning interior plastic, metal and wood
parts (p. 640)

Cleaning leather upholstery

*

Only use cleaning agents and car care prod-
ucts recommended by Volvo. Clean regularly,
and deal with stains straight away. Vacuum-
ing is important prior to using cleaning
agents.

Volvo's leather upholstery

*

 is treated to pre-

serve its original appearance.

Leather upholstery

*

 is a natural product that

changes and acquires a beautiful patina over
time. Regular cleaning and treatment are
required in order that the properties and col-
ours of the leather shall be preserved. Volvo
offers a comprehensive product, Volvo Leather
Care KitWipes, for cleaning and treatment of
leather upholstery. The protective outer layer
of the leather is preserved when this is used
according to the instructions.

To achieve results that are as good as possi-
ble, Volvo recommends cleaning and applica-
tion of the protective cream one to four times
per year (or more frequently if required). Volvo
Leather Care Kit/Wipes is available from Volvo
dealers.

Cleaning the leather upholstery

1. Apply the leather cleaner to a damp

sponge and squeeze until a foam is cre-
ated.

2. Use the sponge on the stain in a circular

motion.

3. Thoroughly dampen the stain using the

sponge, allow the sponge to absorb the
stain without scrubbing.

4. Wipe the stain with a soft cloth and allow

the leather to dry thoroughly.

Protecting the leather upholstery

1. Apply a small amount of leather protective

agent to a cloth and then apply it to the
leather in light circular motions.

2. Allow to dry for about 20 minutes.

> Protecting the leather upholstery

makes it more resistant to the stresses
from the sun's UV radiation.

Related information

•

Cleaning the interior (p. 636)

•

Cleaning the centre display (p. 636)

•

Cleaning fabric upholstery and headlining
(p. 638)

•

Cleaning the seatbelts (p. 638)

•

Cleaning floor mats and inlay mats
(p. 638)

•

Cleaning the leather steering wheel
(p. 640)

•

Cleaning interior plastic, metal and wood
parts (p. 640)

MAINTENANCE AND SERVICE

* Option/accessory.

640

Cleaning the leather steering

wheel

Only use cleaning agents and car care prod-
ucts recommended by Volvo. Clean regularly,
and deal with stains straight away. Vacuum-
ing is important prior to using cleaning
agents.

Leather needs to breathe. Never cover the
leather steering wheel with protective plastic.
We recommend Volvo Leather Care Kit/Wipes
for cleaning the leather steering wheel. First
remove dirt, dust, etc. with a damp sponge or
cloth.

IMPORTANT

Sharp objects, e.g. rings, can damage the
leather on the steering wheel.

Related information

•

Cleaning the interior (p. 636)

•

Cleaning the centre display (p. 636)

•

Cleaning fabric upholstery and headlining
(p. 638)

•

Cleaning the seatbelts (p. 638)

•

Cleaning floor mats and inlay mats
(p. 638)

•

Cleaning leather upholstery

*

 (p. 639)

•

Cleaning interior plastic, metal and wood
parts (p. 640)

Cleaning interior plastic, metal and

wood parts

Only use cleaning agents and car care prod-
ucts recommended by Volvo. Clean regularly,
and deal with stains straight away.

A fibrillated fibre or microfibre cloth, lightly
moistened with water, available from Volvo
dealers, is recommended for cleaning interior
parts and surfaces.

Do not scrape or rub stains. Never use strong
stain removers, either.

IMPORTANT

Do not use solvent that contains alcohol
when cleaning the glass for the driver dis-
play.

IMPORTANT

Keep in mind that high gloss surfaces are
easily scratched. Clean these surfaces with
a clean, dry microfibre cloth using small,
circular motions. If needed, dampen the
microfibre cloth with a little clean water.

Related information

•

Cleaning the interior (p. 636)

•

Cleaning the centre display (p. 636)

•

Cleaning fabric upholstery and headlining
(p. 638)

•

Cleaning the seatbelts (p. 638)

•

Cleaning floor mats and inlay mats
(p. 638)

•

Cleaning leather upholstery

*

 (p. 639)

•

Cleaning the leather steering wheel
(p. 640)

MAINTENANCE AND SERVICE

}}

641

Cleaning the exterior

The car should be washed as soon as it
becomes dirty. This means that the car is eas-
ier to clean since the dirt does not attach as
firmly. It also reduces the risk of scratches
and keeps the car fresh. Carry out cleaning in
a cleaning area with an oil separator, and use
car shampoo.

Related information

•

Cleaning the exterior (p. 641)

•

Polishing and waxing (p. 641)

•

Handwashing (p. 642)

•

Automatic car wash (p. 643)

•

High-pressure washing (p. 645)

•

Cleaning the wiper blades (p. 645)

•

Cleaning exterior plastic, rubber and trim
components (p. 645)

•

Cleaning wheel rims (p. 646)

•

Rustproofing (p. 647)

Polishing and waxing

Polish and wax the car if the paintwork is dull
or to give the paintwork extra protection. The
car does not need to be polished until it is at
least one year old. However, the car can be
waxed during this time. Do not polish or wax
the car in direct sunlight, the surface being
polished should be a maximum of 45 °C
(113 °F).

•

Wash and dry the car thoroughly before
you begin polishing or waxing. Clean off
asphalt and tar stains using tar remover or
white spirit. More stubborn stains can be
removed using fine rubbing paste
designed for car paintwork.

•

Polish first with a polish and then wax
with liquid or solid wax. Follow the
instructions on the packaging carefully.
Many preparations contain both polish
and wax.

IMPORTANT

Avoid waxing and polishing on plastic and
rubber.

When using degreasant on plastic and rub-
ber, only rub with light pressure if it is nec-
essary. Use a soft washing sponge.

Polishing glossy trim mouldings could
wear away or damage the glossy surface
layer.

Polishing agent that contains abrasive
must not be used.

IMPORTANT

Only paint treatment recommended by
Volvo should be used. Other treatment
such as preserving, sealing, protection, lus-
tre sealing or similar could damage the
paintwork. Paintwork damage caused by
such treatments is not covered by Volvo
warranty.

Related information

•

Cleaning the exterior (p. 641)

•

Handwashing (p. 642)

•

Automatic car wash (p. 643)

•

High-pressure washing (p. 645)

•

Cleaning the wiper blades (p. 645)

MAINTENANCE AND SERVICE

642

•

Cleaning exterior plastic, rubber and trim
components (p. 645)

•

Cleaning wheel rims (p. 646)

•

Rustproofing (p. 647)

Handwashing

The car should be washed as soon as it
becomes dirty. This means that the car is eas-
ier to clean since the dirt does not attach as
firmly. It also reduces the risk of scratches
and keeps the car fresh. Carry out cleaning in
a cleaning area with an oil separator, and use
car shampoo.

Important points to remember when
handwashing the car

•

Avoid washing the car in direct sunlight.
This can cause the detergent or wax to dry
and have an abrasive effect.

•

Remove bird droppings from the paint-
work as soon as possible. They contain
substances that damage and discolour
paintwork very quickly. For example, use
soft paper or sponge soaked in plenty of
water. An authorised Volvo workshop is
recommended for the removal of any dis-
colouration.

•

Wash the underbody, including wheel
housings and bumpers.

•

Rinse the entire car until the dissolved dirt
has been removed so as to reduce the risk
of scratches from washing. Do not spray
directly onto the locks.

•

If necessary, use cold degreasing agent on
very dirty surfaces. Note that in this case,
the surfaces must not be hot from the sun.

•

Wash using a sponge, car shampoo and
plenty of lukewarm water.

•

Clean the wiper blades with a lukewarm
soap solution or car shampoo.

•

Dry the car using a clean, soft chamois or
a water scraper. If you avoid allowing
drops of water to dry in strong sunlight,
you reduce the risk of water drying stains
which may need to be polished out.

•

After the car has been washed, tar from
asphalt may remain. Use tar remover to
get rid of the last spots.

WARNING

Always have the engine cleaned by a work-

shop. There is a risk of fire if the engine is

hot.

IMPORTANT

Dirty headlamps have impaired functional-
ity. Clean them regularly, e.g. when refuel-
ling.

Do not use any corrosive cleaning agents
but use water and a non-scratching
sponge instead.

MAINTENANCE AND SERVICE

}}

* Option/accessory.

643

NOTE

Outside lighting such as headlamps and
rear lamps may temporarily have conden-
sation on the inside of the lens. This is nor-
mal, all exterior lighting is designed to
withstand this. Condensation is normally
vented out of the lamp housing when the
lamp has been switched on for a time.

IMPORTANT

•

Make sure that the sunroof

*

 and sun

visor are closed before washing the
car.

•

Never use polishing agent with abra-
sive properties on the sunroof.

•

Never use wax on the rubber mould-
ings around the sunroof.

IMPORTANT

Remember to remove dirt from the drain
holes in the doors and in the sills after
washing the car.

Related information

•

Cleaning the exterior (p. 641)

•

Polishing and waxing (p. 641)

•

Automatic car wash (p. 643)

•

High-pressure washing (p. 645)

•

Cleaning the wiper blades (p. 645)

•

Cleaning exterior plastic, rubber and trim
components (p. 645)

•

Cleaning wheel rims (p. 646)

•

Rustproofing (p. 647)

•

Automatic parking brake activation setting
(p. 444)

Automatic car wash

The car should be washed as soon as it
becomes dirty. The longer the car is left dirty,
the more difficult it will be to get it com-
pletely clean and there is a risk of scratching
the paintwork.

Washing the car in an automatic car wash is a
simple and quick way of getting it clean, but it
cannot reach everywhere. Volvo recommends
washing your car by hand or using an auto-
matic car wash supplemented with washing
by hand.

NOTE

Volvo recommends that the car is not
washed in an automatic car wash during
the first few months (this is because the
paintwork has not fully hardened).

IMPORTANT

Before driving the car into an automatic car
wash, deactivate the functions for auto-
matic braking when stationary and auto-
matic parking brake application. If these
functions are not deactivated, the brake
system will jam when the car is stationary
and the car will not be able to move.

||

MAINTENANCE AND SERVICE

* Option/accessory.

644

IMPORTANT

For car washes where the car is pulled for-
ward with rolling wheels, the following
applies:

1. Before washing the car, make sure that

the automatic rain sensor is deacti-
vated, otherwise there is the risk of it
starting and damaging the wiper arms.

2. Make sure that the door mirrors are

retracted, any auxiliary lamps secured,
antennas retracted or removed, other-
wise they risk being damaged by the
automatic car wash.

3. Drive into the car wash.
4. Switch off the "Automatic braking at

standstill" function using the button 
on the tunnel console.

5. Switch off the "Automatic parking

brake application" function via the top
view of the centre display.

6. Switch off the engine by turning the

start knob in the tunnel console clock-
wise. Hold the knob in place for at
least 2 seconds.

The car is ready for the car wash.

IMPORTANT

The system will automatically switch to 

P

mode unless the above step is followed.
The wheels are locked in 

P

 mode, which

they should not be when putting the car
through an automatic car wash.

NOTE

Be aware that if the car has the keyless
locking and unlocking function

*

, the car

can be locked/unlocked when the car is
being washed if the remote control key is
within range.

Related information

•

Cleaning the exterior (p. 641)

•

Polishing and waxing (p. 641)

•

Handwashing (p. 642)

•

High-pressure washing (p. 645)

•

Cleaning the wiper blades (p. 645)

•

Cleaning exterior plastic, rubber and trim
components (p. 645)

•

Cleaning wheel rims (p. 646)

•

Rustproofing (p. 647)

•

Automatic braking when stationary
(p. 446)

•

Automatic parking brake activation setting
(p. 444)

•

Keyless and touch-sensitive surfaces

*

(p. 260)

MAINTENANCE AND SERVICE

}}

* Option/accessory.

645

High-pressure washing

The car should be washed as soon as it
becomes dirty. The longer the car is left dirty,
the more difficult it will be to get it com-
pletely clean and there is a risk of scratching
the paintwork. Wash the car in a car wash
with oil separator. Use car shampoo.

When using high-pressure washing, use
sweeping movements and make sure that the
nozzle does not come closer than 30 cm
(13 in.) to the surface of the car. Do not spray
directly onto the locks.

Related information

•

Cleaning the exterior (p. 641)

•

Polishing and waxing (p. 641)

•

Handwashing (p. 642)

•

Automatic car wash (p. 643)

•

Cleaning the wiper blades (p. 645)

•

Cleaning exterior plastic, rubber and trim
components (p. 645)

•

Cleaning wheel rims (p. 646)

•

Rustproofing (p. 647)

Cleaning the wiper blades

The car should be washed as soon as it
becomes dirty. The longer the car is left dirty,
the more difficult it will be to get it com-
pletely clean and there is a risk of scratching
the paintwork. Wash the car in a car wash
with oil separator. Use car shampoo.

Asphalt, dust and salt residue on wiper blades,
as well as insects, ice etc. on the windscreen,
impair the service life of wiper blades.

When cleaning, set the wiper blades in service
position.

NOTE

Wash the wiper blades and windscreen
regularly with a lukewarm soap solution or
car shampoo. Do not use any strong sol-
vents.

Related information

•

Cleaning the exterior (p. 641)

•

Polishing and waxing (p. 641)

•

Handwashing (p. 642)

•

Automatic car wash (p. 643)

•

High-pressure washing (p. 645)

•

Cleaning exterior plastic, rubber and trim
components (p. 645)

•

Cleaning wheel rims (p. 646)

•

Rustproofing (p. 647)

Cleaning exterior plastic, rubber

and trim components

The car should be washed as soon as it
becomes dirty. The longer the car is left dirty,
the more difficult it will be to get it com-
pletely clean and there is a risk of scratching
the paintwork. Carry out cleaning in a clean-
ing area with an oil separator, and use car
shampoo.

A special cleaning agent available from Volvo
dealers is recommended for the cleaning and
care of coloured plastic parts, rubber and trim
components, e.g. glossy trim mouldings.
When using such a cleaning agent the instruc-
tions must be followed carefully.

Avoid washing the car with detergent with a
pH value below 3.5 or above 11.5. This can
cause discolouration of anodised aluminium
components

*

, as illustrated. We advise

against use of abrasive polishing agents, as
illustrated.

||

MAINTENANCE AND SERVICE

646

Parts that should be washed using a cleaning agent

with a pH value between 3.5 and 11.5.

IMPORTANT

Avoid waxing and polishing on plastic and
rubber.

When using degreasant on plastic and rub-
ber, only rub with light pressure if it is nec-
essary. Use a soft washing sponge.

Polishing glossy trim mouldings could
wear away or damage the glossy surface
layer.

Polishing agent that contains abrasive
must not be used.

IMPORTANT

Avoid washing the car with cleaning agent
with a pH value lower than 3.5 or higher
than 11.5. This may result in discolouration
of anodised aluminium parts such as roof
rack and around the side windows.

Never use metal polishing agent on ano-
dised aluminium parts, this can result in
discolouration and destroy the surface
treatment.

Related information

•

Cleaning the exterior (p. 641)

•

Polishing and waxing (p. 641)

•

Handwashing (p. 642)

•

Automatic car wash (p. 643)

•

High-pressure washing (p. 645)

•

Cleaning the wiper blades (p. 645)

•

Cleaning wheel rims (p. 646)

•

Rustproofing (p. 647)

Cleaning wheel rims

The car should be washed as soon as it
becomes dirty. The longer the car is left dirty,
the more difficult it will be to get it com-
pletely clean and there is a risk of scratching
the paintwork. Carry out cleaning in a clean-
ing area with an oil separator, and use car
shampoo.

Only use rim cleaning agent recommended by
Volvo.

Strong rim cleaning agents can damage the
surface and cause stains on chrome-plated
aluminium rims.

Related information

•

Cleaning the exterior (p. 641)

•

Polishing and waxing (p. 641)

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Handwashing (p. 642)

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Automatic car wash (p. 643)

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High-pressure washing (p. 645)

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Cleaning exterior plastic, rubber and trim
components (p. 645)

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Cleaning wheel rims (p. 646)

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Rustproofing (p. 647)