Definition Of Terms For Tires And Loading - Mercedes-Benz B-Class Electric Drive W245 Operator's Manual

Uniform Tire Quality Grading Stand-
ards
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 manufac-
turer following specifications from the US
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 con-
tains the recommended tire pressure for cold
tires, the maximum permissible load and the
maximum permissible vehicle speed.
The tire pressure table contains the recom-
mended 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 not
exceed the gross axle weight rating. The max-
imum gross axle weight rating can be found
on the vehicle identification plate on the B-
pillar on the driver's side.

Definition of terms for tires and loading

Speed rating
The speed rating is part of the tire identifica-
tion. It specifies the speed range for which the
tire is approved.
GVW (Gross Vehicle Weight)
The gross vehicle weight comprises the
weight of the vehicle including tools, acces-
sories installed, occupants and luggage. The
gross vehicle weight must not exceed the
gross vehicle weight rating (GVWR) as speci-
fied on the vehicle identification plate on the
B-pillar on the driver's side.
GVWR (Gross Vehicle Weight Rating)
The GVWR is the maximum permitted gross
weight of the fully laden vehicle (weight of the
vehicle including all accessories, occupants
and luggage). 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:
the curb weight of the vehicle
R
the weight of the accessories
R
the load limit
R
the weight of the factory installed optional
R
equipment
Kilopascal (kPa)
Metric unit for tire pressure. 6.9 kPa corre-
sponds to 1 psi. Another unit for tire pressure
is bar. 100 kilopascals (kPa) are the equiva-
lent of 1 bar.
Load index
In addition to the load-bearing index, the load
index may also be imprinted on the sidewall of
297
Z