Tire Ply Material - Mercedes-Benz 2008 S550 Operator's Manual

2008 s-class

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surfaces of asphalt and concrete. A tire

marked C may have poor traction perfor-

The traction grade assigned to this tire is

based on straight-ahead braking traction

tests, and does not include acceleration,

cornering, hydroplaning, or peak traction

characteristics.

The temperature grades are A (the high-

est), B, and C, representing the tire's resis-

tance to the generation of heat and its

ability to dissipate heat when tested under

controlled conditions on a specified indoor

laboratory test wheel. Sustained high tem-

perature can cause the material of the tire

to degenerate and reduce tire life, and ex-

cessive temperature can lead to sudden

tire failure. The grade C corresponds to the

minimum 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

The temperature grade for this tire is estab-

lished for a tire that is properly inflated and

not overloaded. Excessive speed, underin-

flation, or excessive loading, either sepa-

rately or in combination, can cause

excessive heat build-up and possible tire