Do notoverload thetires by exceeding themaxi‐
mum permissible load.
See also:
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Maximum permissible load on theTireand
Loading Informationplacard(/page302)
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Maximum tireload (/ page306)
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Load index
Speed rating 77:
Specifiesthe approved maximum speed of the
tire.
%
An electronicspeed limiter prevents your
vehicle from exceeding aspeed of 130mph
(210 km/h).
Ensure that your tires have therequired speed
rating.You can obtain information on the
required speed rating at an authorized Mercedes-
Benz Center.
Summer tires
IndexSpeedrating
LUpto75mph (120 km/h)
MUpto81mph (130 km/h)
NUpto87mph (140 km/h)
PUpto93mph (150 km/h)
QUpto100 mph(160km/h)
RUpto106 mph(170km/h)
Summer,all-season and winter tires
IndexSpeedrating
LM+S
1
Up to 75 mph(120km/h)
MM+S
1
Up to 81 mph(130km/h)
NM+S
1
Up to 87 mph(140km/h)
PM+S
1
Up to 93 mph(150km/h)
QM+S
1
Up to 100mph (160 km/h)
RM+S
1
Up to 118mph (170 km/h)
1
:or"M+S i"for winter tires
Winter tires aremarkedwiththe i snowflake
symbol and fulfill therequirements of theRubber
ManufacturersAssociation (RMA) and theRubber
AssociationofCanada (RAC) regarding thetire
traction on snow.
Load index 88:
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"Light load": light load tires
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"C": commercial tires
Information on definitions (tires and load‐
ing)
Tire structure and characteristics: describes
thenumber of layers or thenumber of rubber-
coated layers in thetiretread and thetirewall.
These aremade of steel, nylon, polyester and
other materials.
Bar: metric unit fortirepressure.
14.5038 pounds per squareinch(psi) and
100kilopascals (kPa) arethe equivalent of 1bar.
DOT(Department of Transportation): DOT
markedtires fulfill therequirements of the
U.S. Department of Transportation.
Averageweight of vehicleoccupants: the
number of occupants forwhichthe vehicle is
designed multiplied by 150lbs (68 kg).
UniformTireQuality Grading Standards: auni‐
form standardtograde thequality of tires with
regardstotread quality,tiretraction and temper‐
aturecharacteristics. The quality grading assess‐
mentismade by themanufacturer in accordance
withtestspecifications of theU.S. government.
The quality grade of atireisimprinted on the
sidewall of thetire.
Recommended tirepressure: therecommen‐
ded tirepressureisthe pressurespecified forthe
tires installed on thevehicle at thefactory.
The Tire and LoadingInformationplacardcon‐
tains therecommended tirepressures forcold
tires, themaximum permissible load and the
maximumpermissible vehicle speed.
The tirepressuretable contains therecommen‐
ded tirepressuresfor cold tires under various
operating conditions, i.e. load and/or speed of
thevehicle.
Increased vehicleweight due to optional
equipment: thecombined weight of all standard
and optional equipmentavailable forthe vehicle,
regardless of whether it is actually installed on
thevehicle or not.
Rim: thepartofthe wheel on whichthe tireis
installed.
GAWR (Gross AxleWeight Rating): GAWR is the
gross axle weight rating.The actual load on an
axlemustneverexceed theGross Axle Weight
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Wheels and tires
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