Bedienungsanleitung Mercedes GLA 2017 (Seite 308 von 330) (Englisch)

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Permissible Gross Vehicle Weight Rating

(GVWR): the gross weight of the vehicle, all pas-

sengers, load and trailer load/noseweight (if

applicable) must not exceed the permissible

gross vehicle weight.

Gross Axle Weight Rating (GAWR): the maxi-

mum permissible weight that can be carried by

one axle (front or rear axle).

To ensure that your vehicle does not exceed the

maximum permissible values (gross vehicle

weight and maximum gross axle weight rating),

have your loaded vehicle (including driver, occu-

pants, cargo, and full trailer load if applicable)

weighed on asuitable vehicle weighbridge.

All about wheelsand tires

Uniform Tire Quality Grading Stand-

ards

Overview of Tire Quality Grading Stand-

ards

Uniform Tire Quality Grading Standards are U.S.

governmentspecifications. Their purpose is to

provide drivers with uniform reliable information

on tire performance data. Tire manufacturers

have to grade tires using three performance fac-

tors: : tread wear grade, ; traction grade and

= temperature grade. These regulations do not

apply to Canada. Nevertheless, all tires sold in

North America are provided with the corre-

sponding quality grading markings on the side-

wall of the tire.

Quality grades can be found, where applicable,

on the tire sidewallbetween tread shoulder and

maximum section width.

Example:

Treadwear grade: 200

Traction grade: AA

Temperaturegrade: A

All passenger car tires must conformtothe stat-

utory safety requirements in addition to these

grades.

The actual values for tires are vehicle-spe-

cific and may deviate from the values in the

illustration.

Treadwear

The treadwear grade is acomparative rating

based on the wear rate of the tire when tested

under controlled conditionsonaspecified U.S.

governmentcourse. For example, atire graded

150 would wear one and one-half times as well

on the governmentcourse as atire graded 100.

The relative performance of tires depends upon

the actual conditionsoftheir use, however, and

may depart significantly from the norm due to

variations in driving habits, service practices

and differences in road characteristics and cli-

mate.

Traction

WARNING

The traction grade assigned to this tire is

based on straight-ahead braking traction

tests, and does not include acceleration, cor-

nering, hydroplaning, or peak traction char-

acteristics.

Avoid wheelspin. This can lead to damage to

the drive train.

The traction grades –from highest to lowest –

are AA, A, Band C. Those grades represent the

tire's ability to stop on wet pavement as meas-

ured under controlled conditionsonspecified

governmenttest surfaces of asphalt and con-

crete. Atire marked Cmay have poor traction

performance.

The safe speed on awet, snow covered or icy

road is always lower than on dry road surfaces.

You should pay special attention to road condi-

tions when temperatures are around freezing

point.

Mercedes-Benzrecommends aminimum tread

depth of ã in (4 mm) on all four winter tires.

306

All about wheels and tires

Wheels and tires

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Mercedes GLA 2017 Seite 308

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