BMW SERIE 3 COUPE 2000 Manuel du propriétaire télécharger pdf (Page 133)

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RepairsIndex OverviewControlsCar careTechnologyData

Caring for your car

Exterior finish

To provide effective corrosion protec-

tion, multilayer paintwork is applied at

the factory. Cataphoretic immersion

priming techniques are supplemented

using special body-cavity protectants,

with the application of specially-devel-

oped and extensively tested materials.

A layer of flexible PVC is first applied to

the undercarriage. Following this, a

comprehensive undercoating treatment

with a wax-based protectant is applied.

Regular maintenance makes an impor-

tant contribution to maintaining the

safety and resale value of your vehicle.

Increasing awareness of the effects of

harmful environmental factors on vehi-

cle finishes have led paint and vehicle

manufacturers to initiate ongoing pro-

grams designed to further improve the

durability of their finishes. Despite this,

environmental factors that occur locally

or regionally can have negative effects

on the finish of your vehicle. These

should guide you in determining the fre-

quency and extent of your efforts to

maintain the vehicle finish.

Depending upon material and type

of impact (perforation of paint layer),

physical stresses from sand, road salt,

gravel, etc., can cause corrosion to

start extending beneath the finish, start-

ing at the point of impact.

Road dirt, tar spots, dead insects, ani-

mal droppings (strong alkali concentra-

tion) and tree excretions (resins and

pollen) all contain substances capable

of causing damage when allowed to re-

main on the finish of your car for any

period of time (spots, etching, flaking,

separation in the top coat).

In industrial areas, deposits of flue dust,

lime, oily soot, precipitation containing

sulfur-dioxide (acid rain) and other envi-

ronmental pollutants will damage the

car's finish unless adequate care is pro-

vided – even though this generally lim-

ited to the outside horizontal surfaces.

In coastal regions, high levels of atmo-

spheric salt and humidity promote cor-

rosion.

In tropical zones temperatures of over

1007 (406) in the shade prevail, in

addition to heavy ultraviolet radiation

and high humidity. Under those circum-

stances light colored paints reach tem-

peratures of up to 1807 (806) and

dark paints up to 2507 (1206).

Caring for the vehicle finish

Regular washing is a preventive mea-

sure against long-term effects from

substances that are harmful to the vehi-

cle's finish, especially if you drive your

vehicle in areas with high levels of air

pollution or aggressive natural sub-

stances (tree resins, pollen).

Nevertheless, you should immediately

remove especially aggressive sub-

stances. Failure to do so can lead to

changes in the paint's chemical struc-

ture or to discoloration. Gasoline spilled

during refueling, oil, grease and brake

fluid should always be cleaned away

immediately, as should bird droppings.

All of these substances cause damage

to the finish.

Any contamination remaining on the

surface of the vehicle will be especially

conspicuous after washing. Use clean-

ing fluid or alcohol with a clean cloth or

cotton pad to remove. Remove tar

spots with tar remover. After cleaning,

the affected areas should be waxed to

ensure continued protection.

A full range of car-care products is

available from your BMW center.<

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