Mercedes-Benz B-Class Electric Drive W245, Руководство оператора

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the generation of heat and its ability to dissi-
pate heat when tested under controlled con-
ditions on a specified indoor laboratory test
wheel. Sustained high temperature can cause
the material of the tire to degenerate and
reduce tire life, and excessive temperature
can lead to sudden tire failure. The grade C
corresponds to a level of performance which
all passenger car tires must meet under the
Federal Motor Vehicle Safety Standard No.
109. Grades B and A represent higher levels
of performance on the laboratory test wheel
than the minimum required by law.
Tire labeling
Overview of tire labeling
The following markings are on the tire in addition to
the tire name (sales designation) and the manu-
facturer's name:
:
Uniform tire Quality Grading Standard
(
Y
page 297)
;
DOT tire Identification Number
(
Y
page 295)
=
Maximum tire load (
Y
page 291)
?
Maximum tire pressures (
Y
page 284)
A
Manufacturer
B
Tire material (
Y
page 296)
C
Tire size designation, load-bearing capa-
city and speed rating (
Y
page 293)
D
Load index (
Y
page 295)
E
Tire name
i
Tire data is vehicle-specific and may devi-
ate from the data in the example.
Tire size designation, load-bearing
capacity and speed rating
:
Tire width
;
Nominal aspect ratio in %
=
Tire code
?
Rim diameter
A
Load bearing index
B
Speed rating
i
Tire data is vehicle-specific and may devi-
ate from the data in the example.
General: depending on the manufacturer's
standards, the size imprinted in the tire wall
may not contain any letters or may contain
one letter that precedes the size description.
If there is no letter preceding the size descrip-
tion (as shown above): these are passenger
vehicle tires according to European manufac-
turing standards.
If "P" precedes the size description: these are
passenger vehicle tires according to U.S.
manufacturing standards.
If "LT" precedes the size description: these
are light truck tires according to U.S. manu-
facturing standards.
If "T" precedes the size description: compact
emergency wheels with high tire pressure
Tire labeling
293
Whe
el
s
and
tire
s
Z