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Whee ls and tires, All about wheels and tires – Mercedes-Benz S-Class 2014 Owners Manual User Manual

Page 407

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100 kilopascals (kPa) are the equivalent of

1 bar.
DOT (Department of Transportation)
DOT-marked tires fulfill the requirements of

the U S Department of Transportation.
Normal occupant weight
The number of occupants for which the

vehicle is designed multiplied by

68 kilograms (150 lbs).
Uniform Tire Quality Grading Standards
A uniform standard to grade the quality of

tires with regards to tread quality, tire traction

and temperature characteristics. The quality

grading assessment is made by the

manufacturer following specifications from

the U.S. government. The ratings are molded

into the sidewall of the tire.
Recommended tire pressures
The recommended tire pressure applies to

the tires mounted at the factory.
The Tire and Loading Information placard

contains the recommended tire pressures for

cold tires on a fully loaded vehicle and for the

maximum permissible vehicle speed.
The tire pressure table contains the

recommended pressures for cold tires for

various operating conditions, i.e. differing

load and speed conditions.
Increased vehicle weight due to optional

equipment
The combined weight of all standard and

optional equipment available for the vehicle,

regardless of whether it is actually installed

on the vehicle or not.
Rim
This is the part of the wheel on which the tire

is mounted.
GAWR (Gross Axle Weight Rating)
The GAWR is the maximum gross axle weight

rating. The actual load on an axle must never

exceed the gross axle weight rating. The

gross axle weight rating can be found on the

vehicle identification plate on the B-pillar on

the driver's side.
Speed rating
The speed rating is part of the tire

identification. It specifies the speed range for

which the tire is approved.
GVW (Gross Vehicle Weight)
The gross vehicle weight includes the weight

of the vehicle including fuel, tools, the spare

wheel, accessories installed, occupants,

luggage and the drawbar noseweight, if

applicable. The gross vehicle weight must not

exceed the gross vehicle weight rating GVWR

as specified on the vehicle identification plate

on the B-pillar on the driver's side.
GVWR (Gross Vehicle Weight Rating)
The GVWR is the maximum permissible gross

weight of a fully loaded vehicle (the weight of

the vehicle including all accessories,

occupants, fuel, luggage and the drawbar

noseweight, if applicable). The gross vehicle

weight rating is specified on the vehicle

identification plate on the B-pillar on the

driver's side.
Maximum loaded vehicle weight
The maximum weight is the sum of:

R

the curb weight of the vehicle

R

the weight of the accessories

R

the load limit

R

the weight of the factory installed optional

equipment

Kilopascal (kPa)
Metric unit for tire pressure. 6.9 kPa

corresponds to 1 psi. Another unit for tire

pressure is bar. 100 kilopascals (kPa) are the

equivalent of 1 bar.
Load index
In addition to the load-bearing index, the load

index may also be imprinted on the sidewall

of the tire. This specifies the load-bearing

capacity more precisely.

All about wheels and tires

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