Uniform tire quality grading standards – Mercedes-Benz 2005 E 320 User Manual

Page 331

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330

Operation

Tires and wheels

Always follow the recommended tire
inflation pressure (

page 316) for proper

tire inflation.

Uniform Tire Quality Grading Standards
(U.S. vehicles)

Tire manufacturers are required to grade
tires based on three performance factors:
treadwear, traction and temperature resis-
tance.

1 Treadwear
2 Traction
3 Temperature resistance

Quality grades can be found, where appli-
cable, on the tire sidewall between tread
shoulder and maximum section width. For
example:

All passenger car tires must conform to
federal safety requirements in addition to
these grades.

Warning!

G

Never exceed the max. tire inflation

pressure. Follow recommended tire inflation

pressures.

Do not underinflate tires. Underinflated tires

wear excessively and /or unevenly, adverse-

ly affect handling and fuel economy, and are

more likely to fail from being overheated.

Do not overinflate tires. Overinflated tires

can adversely affect handling and ride com-

fort, wear unevenly, increase stopping dis-

tance, and result in sudden deflation

(blowout) because they are more likely to

become punctured or damaged by road de-

bris, potholes etc.

i

For illustration purposes only. Actual
data on tires are specific to each vehi-
cle and may vary from data shown in
above illustration.

Treadwear Traction

Temperature

200

AA

A

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