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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 Band
A represent higher levels of performance on
the laboratory test wheel than the minimum
required by law.
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 heat buildup
and possible tire failure.
Runflat tires
Runflat tires, refer to page 297, are labeled
with a circular icon containing the letters RSC
marked on the tire sidewall.
M+S
Winter tires, as well as all-season tires with
better winter performance than summer tires,
can be identified by the M+S marking on the
tire side wall.
Tire tread
Safety information
Warning
If the tire tread depth is too low, driving safety
may be impaired in critical situations such as
aquaplaning or slush on the road. There is
a risk of accident. The tire tread depth may
not fall below 0.12 in/3 mm for summer tires
and 0.16 in/4 mm for winter and all-season
294
Wheels and tires
Online Edition for Part no. 01405A8A749 - VI/23
tires, or observe the statutory regulations on
minimum tread depth.
Minimum tread depth
The tire manufacturer's wear indicators are
distributed over the tire circumference. These
indicators have a height of min. 0.06 in/1.6 mm
and serve as an indicator for tire tread wear.
The positions of the wear indicators are
marked on the tire sidewall with TWI, Tread
Wear Indicator.
Tire damage
General information
Check your tires regularly for damage, foreign
bodies lodged in the tread, and tread wear.
Indications of tire damage or another vehicle
malfunction:
▷
Unusual vibrations.
▷
Unusual tire or running noises.
▷
Unusual handling such as a strong ten-
dency to pull to the left or right.
▷
Uneven wear pattern, e.g., increased wear
in the area of the tire shoulder.
Damage can be caused by the following situa-
tions, for instance:
▷
Driving over curbs.
▷
Road damage.
▷
Tire pressure too low.
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