Mercedes-Benz SL 65 AMG Black Series Operator's Manual page 179

230_AKB; 1; 42, en-US
d2ureepe,
TWI (Tread Wear Indicator)
1
The treadwear indicator appears as a solid
band across the tread.
Storing tires
! Keep unmounted tires in a cool, dry place
with as little exposure to light as possible.
Protect tires from contact with oil, grease
and fuels.
Cleaning tires
! Never use a round nozzle to power wash
tires. The intense jet of water can result in
damage to the tire.
Always replace a damaged tire.
2008-11-27T15:37:19+01:00 - Seite 177
Version: 2.11.7.1
Uniform Tire Quality Grading
Standards
The Uniform Tire Quality Grading is a U.S.
Government requirement designed to give
drivers consistent and reliable information
regarding tire performance. Tire
manufacturers are required to grade tires
based on three performance factors:
treadwear, traction, and temperature
resistance. All tires made for sale in North
America have these grades branded on the
sidewall.
Treadwear
1
Traction
2
Temperature resistance
3
i For illustration purposes only. Actual data
on tires are specific to each vehicle and
Operation
Tires and wheels
may vary from data shown in above
illustration.
Quality grades can be found, where
applicable, on the tire sidewall between tread
shoulder and maximum section width. For
example:
Treadwear Traction Temperature
200 AA A
All passenger car tires must conform to
federal safety requirements in addition to
these grades.
Treadwear
The treadwear grade is a comparative rating
based on the wear rate of the tire when tested
under controlled conditions on a specified
U.S. Government test course. For example, a
tire graded 150 would wear one and one-half
1
(1 / ) times as well on the government
2
course as a tire graded 100.
The relative performance of tires depends
upon the actual conditions of their use,
however, and may depart significantly from
the norm due to variations in driving habits,
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