All About Wheels And Tires; Temperature - Mercedes-Benz S-Class Operator's Manual

on surfaces that are not icy or covered with
snow. Take appropriate care when driving.
Further information on winter tires (M+S
tires) ( page 444).
Y

Temperature

G WARNING
The temperature grade for this tire is estab-
lished for a tire that is properly inflated and
not overloaded. Excessive speed, underinfla-
tion, or excessive loading, either separately or
in combination, can cause excessive heat
build-up and possible tire failure.
The temperature grades are A (the highest), B,
and C. They represent the tire's resistance to
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.

All about wheels and tires

Tire labeling
Overview
Uniform Tire Quality Grading Standard
:
( page 463)
Y
DOT, Tire Identification Number
;
( page 462)
Y
Maximum tire load (
=
Maximum tire pressure (
?
Manufacturer
A
Tire material ( page 463)
B
Y
Tire size designation, load-bearing capa-
C
city and speed rating (
Load index ( page 462)
D
Y
Tire name
E
The markings described above are on the tire
in addition to the tire name (sales designa-
tion) and the manufacturer's 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
G WARNING
Exceeding the stated tire load-bearing capa-
city and the approved maximum speed could
lead to tire damage or the tire bursting. There
is a risk of accident.
page 462)
Y
page 448)
Y
page 459)
Y
Z
459