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owners manual Mercedes GLA
owners manual Mercedes GLA - year of production: 2013 - Mercedes GLA W212 X156 owners manual EN
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from owners manual to the vehicle Mercedes GLA, year of production 2013:
340 UniformTire Quality Grading Standards
under controlled conditions on a specified
UniformTire Quality Grading Stand-
U.S. government course. For example, a tire
ards
graded 150 would wear one and one-half
OverviewofTireQuality Grading
times as well on the government course as a
Standards
tire graded 100.
The relative performance of tires depends
upontheactual conditions of their use, how-
ever, and may depart significantly from the
norm, due to variations in driving habits, ser-
vice practices and differences in road char-
acteristics and climate conditions.
Traction
GWARNING
The traction grade assigned to this tire is
Uniform Tire Quality Grading Standards are
based on straight-ahead braking traction
U.S. government specifications. Their pur-
tests, and does not include acceleration, cor-
pose is to provide drivers with uniform relia-
nering, hydroplaning, or peak traction char-
bleinformationontireperformancedata.Tire
acteristics.
manufacturershavetogradetiresusingthree
tires
performancefactors:treadwear:,tiretrac-
The traction grades, from highest to lowest,
tion ;, and heat resistance =. These regu-
are AA, A, B, and C. Those grades represent
and
lationsdonotapplytoCanada.Nevertheless,
the tire's ability to stop on a wet surface as
all tires sold in North America are provided
measuredundercontrolled conditions on
with the corresponding quality grading mark-
specifiedgovernmenttestsurfacesofasphalt
ings on the sidewall of the tire.
andconcrete.AtiremarkedCmayhavepoor
Wheels
All passenger car tires must conform to the
traction performance.
statutory safety requirements in addition to
Thesafespeedonawet,snowcoveredoricy
these grades.
road is always lower than on dry road surfa-
Whereapplicable, the tire grading informa-
ces.
tioncanbefoundonthetiresidewallbetween
Youshouldpayspecialattentiontoroadcon-
the tread shoulder and maximum tire width.
ditions when temperatures are around the
iTheactualvaluesfortires are vehicle-freezing point.
specific andmaydeviatefromthevaluesin
Mercedes-Benz recommends a minimum
the illustration.
tread depth of ã in (4 mm) for all four winter
tires (Y page 326) to maintain normal driving
For example:
characteristics in winter. Winter tires can
TreadwearTractionTemperature
reducethebrakingdistanceonsnow-covered
surfaces in comparison with summer tires.
200 AA A
Stopping distance, however, is still consider-
ably greater than when the road is not cov-
ered with ice or snow. Take appropriate care
Treadwear
whendriving.
The treadwear grade is a comparative rating
!Avoidwheelspin.Thiscanleadtodamage
basedonthewearrateofthetirewhentested
to the drive train.
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Mercedes GLA W212 X156 owners manual
pages 339 - 345
Mercedes GLA W212 X156 owners manual
page 342 / 374
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