Get Wheels and tires -> Tire labeling Guide for Mercedes E Class 4 Door 2022

Wheels and tires

321

Manufacturer

Tire characteristics (/ page 324)

Tire size designation, load-bearing capacity,

speed rating and load index (/ page 324)

Tire labeling

Overview of tire labeling

Tire name

The data shown in the illustration is example

data.

Tire Quality Grading

Tread wear grade

Traction grade

Temperature grade

In accordance with the US Department of Trans-

portation's "Uniform Tire Quality Grading Stand-

ards", tire manufacturers are required to grade

their tires on the basis of the following three per-

formance factors:

The data shown in the illustration is example

data.

The classiꢀcation is not legally stipulated for

Canada, but it is generally stated.

Tread weaarr grade

Uniform Tire Quality Grading Standards

DOT (Department of Transportation), (TIN)

Tire Identiꢀcation Number

Maximum tire load (/ page 323)

Maximum tire pressure (/ page 323)

The treadwear grade is a comparative rating

based on the wear rate of the tire when tested

under controlled conditions on a speciꢀed govern-

ment test course. For example, a tire graded 150

would wear one and one-half (1\1/2\) times as

Wheels and tires

322

well on the government course as a tire graded

100.

The relative performance of tires depends upon

the actual conditions of their use, however, and

may depart signiꢀcantly from the norm due to var-

iations in driving habits, service practices and dif-

ferences in road characteristics and climate.

The traction grades, from highest to lowest, are

high temperature can cause the material of the

AA, A, B, and C. Those grades represent the tire's tire to degenerate and reduce tire life, and exces-

ability to stop on wet pavement as measured

under controlled conditions on speciꢀed govern-

ment test surfaces of asphalt and concrete. A tire

marked C may have poor traction performance.

sive temperature can lead to sudden tire failure.

The grade C corresponds to a level of perform-

ance which all passenger car tires must meet

under the Federal Motor Safety Standard No.

109. Grades B and A represent higher levels of

performance on the laboratory test wheel than

the minimum required by law.

Temperature grade

TTraction grade

WARNING Risk of accident from tire over-

heating and tire failure

DANGER Risk of accident due to inade-

quate traction

DOT, Tire Identiꢀcation Number (TIN)

Excessive speed, underinꢂation, or excessive

loading, either separately or in combination,

can cause excessive heat build-up and possi-

ble tire failure.

US tire regulations stipulate that every tire manu-

facturer or retreader must imprint a TIN in or on

the side wall of each tire produced.

The traction grade assigned to this tire is

based on straight-ahead braking traction

tests.

Observe the recommended tire pressure.

Regularly check the pressure of all the

tires.

Always adapt your driving style and drive

at a speed to suit the prevailing traꢁc

and weather conditions.

Adjust the tire pressure, if necessary.

NOTE Damage to the drivetrain from

wheelspin

The temperature grades are A (the highest), B,

and C, representing the tire's resistance to the

generation of heat and its ability to dissipate heat

when tested under controlled conditions on a

speciꢀed indoor laboratory test wheel. Sustained

Avoid wheelspin.

Wheels and tires

323

The data shown in the image is example data.

Information on the maximum tire load

Speciꢀcations for maximum tire pressure

The TIN is a unique identiꢀcation number to iden-

tify tires and comprises the following:

DOT (Department of Transportation): tire sym-

bol marks 1 indicating that the tire complies

with the requirements of the US Department

of Transportation.

Manufacturer identiꢀcation code: manufac-

turer identiꢀcation code 2 contains details of

the tire manufacturer. New tires have a code

with two symbols. Retreaded tires have a code

with four symbols. Further information on

retreaded tires (/ page 328).

The data shown in the image is example data.

The data shown in the illustration is example

data.

Maximum tire load 1 is the maximum permissi-

ble weight for which the tire is approved.

Do not overload the tires by exceeding the speci-

ꢀed load limit. The maximum permissible load can

be found on the vehicle's Tire and Loading Infor-

mation placard on the B-pillar on the driver's side

(/ page 316).

Tire size: identiꢀer 3 describes the tire size.

Never exceed maximum tire pressure 1 speci-

ꢀed for the tire. Always observe the recommen-

ded tire pressure for your vehicle when adjusting

the tire pressure (/ page 312).

Tire type code: tire type code 4 can be used

by the manufacturer as a code to describe

speciꢀc characteristics of the tire.

MMaannuuffacturing date: manufacturing date 5

provides information about the age of a tire.

The 1st and 2nd positions represent the cal-

endar week and the 3rd and 4th positions

state the year of manufacture (e.g. "3208"

represents the 32nd week of 2008).

Wheels and tires

324

Information on tire characteristics

Tire size designation, load-bearing capacity, speed

rating and load index

WARNING Risk of injury through exceed-

ing the speciꢀed tire load-bearing capa-

city or the permissible speed rating

Exceeding the speciꢀed tire load rating or the

permissible speed rating may lead to tire dam-

age and to the tires bursting.

Therefore, only use tire types and sizes

First letter(s)

approved for your vehicle model.

Nominal tire width in millimeters

Aspect ratio in %

Tire code

Rim diameter

Load-bearing index

Speed rating

The data shown in the image is example data.

Observe the tire load rating and speed

rating required for your vehicle.

This information describes the type of tire cord

and the number of layers in side wall 1 and

under tire tread 2.

Load index

The data shown in the illustration is example

data.

Information about reading tire data can be

obtained from any qualiꢀed specialist workshop.

Wheels and tires

325

First letter(s) 1:

Rim diameter 5:

An electronic speed limiter prevents your

vehicle from exceeding a speed of 130 mph

Without: passenger vehicle tires according to

The diameter of the bead seat (not the diameter

of the rim ꢂange). The rim diameter is speciꢀed in

inches (in).

(210 km/h).

European manufacturing standards.

Make sure that your tires have the required speed

rating. You can obtain information on the required

speed rating from an authorized Mercedes-Benz

Center.

"P": passenger vehicle tires according to US

manufacturing standards.

Load-bearing index 6:

"LT": light truck tires according to US manu-

facturing standards.

Numerical code that speciꢀes the maximum load-

bearing capacity of a tire (e.g. "91" corresponds

to 1356 lbs (615 kg)).

Summer tires

Index

"T": compact emergency spare wheels with

high tire pressure that are only designed for

temporary use in an emergency.

The load-bearing capacity of the tire must be at

least half the gross axle weight rating of your vehi-

cle. Do not overload the tires by exceeding the

speciꢀed load limit.

Speed rating

up to 100 mph (160 km/h)

up to 106 mph (170 km/h)

up to 112 mph (180 km/h)

up to 118 mph (190 km/h)

up to 130 mph (210 km/h)

up to 149 mph (240 km/h)

up to 168 mph (270 km/h)

up to 186 mph (300 km/h)

Aspect ratio 3::

Ratio between tire height and tire width in percent

(tire height divided by tire width).

See also:

Maximum permissible load on the Tire and

Loading Information placard (/ page 316)

Tire code 4 (tire type):

"R" radial tire

Maximum tire load (/ page 323)

"D": bias ply tire

Load index

"B": bias belted tires

Speed rating 7::

Speciꢀes the approved maximum speed of the

tire.

"ZR": radial tire with a maximum speed above

149 mph (240 km/h) (optional)

Wheels and tires

326

AAllll--wweather tires and winter tires

"C", "D", "E": a load range that depends on the

maximum load that the tire can carry at a cer-

tain pressure

Index

Speed rating

Index

Speed rating

ZR...Y¹

ZR...(..Y)¹

ZR¹

up to 186 mph (300 km/h)

over 186 mph (300 km/h)

over 149 mph (240 km/h)

Q M+S²

T M+S²

H M+S²

V M+S²

up to 100 mph (160 km/h)

up to 118 mph (190 km/h)

up to 130 mph (210 km/h)

up to 149 mph (240 km/h)

Deꢀnition of terms for tires and loading

Tire structure and characteristics: describes the

number of layers or the number of rubber-coated

belts in the tire contact surface and the tire wall.

These are made of steel, nylon, polyester and

other materials.

Bar: metric unit for tire pressure. 14.5038 pounds

per square inch (psi) and 100 kilopascal (kPa) is

the equivalent of one bar.

Specifying the speed rating as the "ZR" index

in tire code 4 is optional for tires up to

186 mph (300 km/h).

If your tire code 4 includes "ZR" and there is

no speed rating 7, ꢀnd out what the maxi-

mum speed is from the tire manufacturer.

If load-bearing index 6 and speed rating 7

are in brackets, the maximum speed rating of

your tire is above 186 mph (300 km/h). To

ꢀnd out the maximum speed, ask the tire man-

ufacturer.

Winter tires bear the i snowꢂake symbol and

fulꢀll the requirements of the Rubber Manufactur-

ers Association (RMA) and the Rubber Association

of Canada (RAC) regarding the tire traction on

snow.

DOT (Department of Transportation): DOT-marked

tires fulꢀll the requirements of the

Load index 8::

US Department of Transportation.

No speciꢀcation given: standard load (SL) tire

Average weight of the vehicle occupants: the

number of vehicle occupants for which the vehicle

is designed, multiplied by 150 lb (68 kg).

Uniform Tire Quality Graddiinngg Standards: a uniform

standard to grade the quality of tires with regard

"XL" or "Extra Load": extra load tire or rein-

forced tire

"Light Load": light load tire

"ZR" stated in the tire code.

Or "M+Si" for winter tires.

Wheels and tires -> Tire labeling for Your Mercedes E Class 4 Door 2022

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