Get Wheels and tires Guide for Mercedes CLA 4 Door Second Generation (2019-2024)

NNoottes on noise or unusual handling ces on noise or unusual handling charharactactereris-is-

ticstics

Make sure there are no vibrations, noises or

unusual handling characteristics when the vehicle

is in motion. This may indicate that the wheels or

tires are damaged. Hidden tire damage could also

be causing the unusual handling characteristics.

If you suspect that a tire is malfunctioning, reduce

your speed immediately and have the tires and

wheels checked at a qualied specialist workshop.

NNoottes on res on regularlegularly inspecting wheels and tiry inspecting wheels and tireses

WARNINGARNING Risk of injury through damaged

tires

Damaged tires can cause tire pressure loss.

Check the tires regularly for signs of

damage and replace any damaged tires

immediately.

WARNINGARNING Risk of hydroplaning due to

insucient tire tread

Insucient tire tread will result in reduced tire

grip.

In heavy rain or slush the risk of hydroplaning

is increased, in particular where speed is not

adapted to suit the conditions.

Thus, you should regularly check the

tread depth and the condition of the

tread across the entire width of all tires.

Minimum tread depth for:

Summer tires: â in (3 mm)

M+S tires: ãin (4 mm)

For safety reasons, replace the tires

before the legally-prescribed limit for the

minimum tread depth is reached.

Carry out the following checks on all wheels regu-

larly, at least once a month or as required, for

example, prior to a long journey or driving o-

road:

Check the tire pressure (/ page 295).

Visually inspect wheels and tires for damage.

Check the valve caps.

Visual check of the tire tread depth and the

tire contact surface across the entire width.

The minimum tread depth for summer tires is

â in (3 mm) and for winter tires ã in (4 mm).

Six marks 1 show where the bar indicators

(arrow) are integrated into the tire tread. They are

visible once a tire tread depth of approximately

á in (1.6 mm) has been reached.

294294

Wheels and tires

NNoottes on snoes on snow cw chainshains

WARNINGARNING Risk of accident due to incor-

rectly installed snow chains

If you have installed snow chains to the rear

wheels, they may drag against the vehicle

body or chassis components.

Never install snow chains on the rear

wheels.

Only install snow chains on the front

wheels in pairs.

NOOTETE Damage to vehicle body or suspen-

sion components caused by installed

snow chains

On 4MATIC vehicles, if you install snow chains

on the rear wheels, you can damage vehicle

body or suspension components.

On 4MATIC vehicles, only install snow

chains on the front wheels.

NOOTETE Damage to the wheel trim from

mounted snow chains

If snow chains are mounted to steel wheels,

the wheel trims can be damaged.

Remove the wheel trims of steel wheels

before mounting snow chains.

Observe the following notes when using snow

chains:

Snow chains are only permissible for certain

wheel/tire combinations. You can obtain infor-

mation about this from an authorized

Mercedes-Benz Center.

For safety reasons, only use snow chains that

have been specically approved for your vehi-

cle by Mercedes-Benz, or snow chains with

the same quality standard.

If snow chains are installed, the maximum per-

missible speed is 30 mph (50 km/h).

Vehicles witehicles with Ah Activctive Pe Pararking Assistking Assist:: Do not

use Active Parking Assist when snow chains

are installed.

You can deactivate ESP

to pull away

(/ page 161). This allows the wheels to spin,

achieving an increased driving force.

TTirire pre pressureessure

NNoottes on tires on tire pre pressureessure

WARNINGARNING Risk of accident due to insu-

cient or excessive tire pressure

Underinated or overinated tires pose in par-

ticular the following risks:

The tires can burst.

The tires can wear excessively and/or

unevenly.

The driving characteristics as well as the

steering and braking characteristics may

be greatly impaired.

Comply with the recommended tire pres-

sures and check the tire pressure of all

tires, including the spare wheel, regu-

larly:

Wheels and tires

295

Monthly

When the load changes

Before embarking on a longer journey

If operating conditions change, e.g. o-

road driving

Adjust the tire pressure, if necessary.

Tire pressure which is too high or too low can:

Shorten the service life of the tires.

Cause increased tire damage.

Adversely aect driving characteristics and

thus driving safety, e.g. due to hydroplaning.

WARNINGARNING Risk of accident due to too low

a tire pressure

Tires with pressure that is too low can over-

heat and burst as a consequence.

In addition, they also suer from irregular

wear, which can signicantly impair the brak-

ing properties and the handling characteris-

tics.

Avoid excessively low tire pressure.

Tire pressure which is too low can cause:

Tire malfunctions as a result of overheating

Impaired handling characteristics

Irregular wear

Increased fuel consumption

WARNINGARNING Risk of accident due to too high

a tire pressure

Tires with excessively high pressure can burst.

In addition, they also suer from irregular

wear, which can signicantly impair the brak-

ing properties and the handling characteris-

tics.

Avoid excessively high tire pressures.

Tire pressure which is too high can cause:

Increased braking distance

Impaired handling characteristics

Irregular wear

Impaired driving comfort

Susceptibility to damage

WARNINGARNING Risk of accident due to repea-

ted pressure drop in the tires

The wheels, valves or tires could be damaged.

Too low a tire pressure can lead to the tires

bursting.

Examine the tires for foreign objects.

Check whether the tire has a puncture or

the valve has a leak.

If you are unable to rectify the damage,

contact a qualied specialist workshop.

You can nd information on tire pressure for the

vehicle's factory-installed tires on the following

labels:

Tire and Loading Information placard on the

B‑pillar of your vehicle (/ page 302).

Tire pressure table on the inside of the fuel

ller ap (/ page 297).

Observe the maximum tire pressure

(/ page 308).

Use a suitable pressure gauge to check the tire

pressure. The outer appearance of a tire does not

296296

Wheels and tires

permit any reliable conclusion about the tire pres-

sure.

Only correct tire pressure when the tires are cold.

Conditions for cold tires:

The vehicle has been parked with the tires out

of direct sunlight for at least three hours.

The vehicle has traveled less than 1 mile

(1.6 km).

The vehicle's tires heat up when driving. As the

temperature of the tires increases, so too does

the tire pressure.

Vehicles witehicles with a tirh a tire pre pressuressure monite monitororing systing system:em:

You can also check the tire pressure using the on-

board computer.

The tire pressure recommended for increased

load/speed in the tire pressure table can aect

the ride comfort.

WARNINGARNING Risk of accident due to unsuita-

ble accessories on tire valves

If you mount unsuitable accessories onto tire

valves, the tire valves may be overloaded and

malfunction, which can cause tire pressure

loss.

Only screw standard valve caps or valve

caps specically approved by Mercedes-

Benz for your vehicle onto the tire valve.

TTirire pre pressuressure te tableable

The tire pressure table is on the inside of the fuel

ller ap.

The data shown in the images is example

data.

The tire pressure table shows the recommended

tire pressure for all tires approved for this vehicle.

The recommended tire pressures apply for cold

tires under various operating conditions, i.e. load-

ing and/or speed of the vehicle.

If one or more tire sizes precede a tire pressure,

the following tire pressure information is only valid

for those tire sizes and their respective load con-

dition.

The load conditions "partially laden" and "fully

laden" are dened in the table for dierent num-

bers of passengers and amounts of luggage. The

actual number of seats may dier from this.

Wheels and tires

297

Some tire pressure tables only show the rim diam-

eter instead of the complete tire size, e.g. R18R18.

The rim diameter is part of the tire size and can

be found on the tire side wall (/ page 309).

Tire and Loading Information placard

(/ page 302)

Maximum tire pressure (/ page 308)

ChecChecking tking the tirhe tire pre pressuressure manuallye manually

Read the tire pressure recommended for the

current operating conditions from the Tire and

Loading Information placard or the tire pres-

sure table. Observe the notes on tire pressure.

Remove the valve cap of the tire to be

checked.

Press the tire pressure gauge securely onto

the valve.

Read the tire pressure.

If the tire pressure is lower than the recom-

mended value, increase the tire pressure to

the recommended value.

If the tire pressure is higher than the recom-

mended value, release air. To do so, press

down the metal pin in the valve, e.g. using the

tip of a pen. Then, check the tire pressure

again using the tire pressure gauge.

Screw the valve cap onto the valve.

Further related subjects:

Notes on tire pressure (/ page 295)

Tire pressure table (/ page 297)

Tire and Loading Information placard

(/ page 302)

TTirire pre pressuressure monite monitororing systing systemem

FFunction of tunction of the tirhe tire pre pressuressure monite monitororing systing systemem

DANANGERGER Risk of accident due to incorrect

tire pressure

Each tire, including the spare (if provided),

should be checked monthly when cold and

inated to the ination pressure recommen-

ded by the vehicle manufacturer on the vehi-

cle placard or tire ination pressure label. (If

your vehicle has tires of a dierent size than

the size indicated on the vehicle placard or

tire ination pressure label, you should deter-

mine the proper tire ination pressure for

those tires.)

As an added safety feature, your vehicle has

been equipped with a tire pressure monitoring

system (TPMS) that illuminates a low tire pres-

sure telltale when one or more of your tires is

signicantly under-inated. Accordingly, when

298298

Wheels and tires

the low tire pressure telltale illuminates, you

should stop and check your tires as soon as

possible, and inate them to the proper pres-

sure. Driving on a signicantlyunder-inated

tire causes the tire to overheat and can lead

to tire failure. Under-ination also reduces fuel

eciency and tire tread life, and may aect

the vehicle’s handling and stopping ability.

Please note that the TPMS is not a substitute

for proper tire maintenance, and it is the driv-

er’s responsibility to maintain correct tire

pressure, even if under-ination has not

reached the level to trigger illumination of the

TPMS low tire pressure telltale.

Your vehicle has also been equipped with a

TPMS malfunction indicator to indicate when

the system is not operating properly. The

TPMS malfunction indicator is combined with

the low tire pressure telltale. When the system

detects a malfunction, the telltale will ash for

approximately one minute and then remain

continuously illuminated. This sequence will

continue upon subsequent vehicle start-ups as

long as the malfunction exists.

When the malfunction indicator is illuminated,

the system may not be able to detect or signal

low tire pressure as intended. TPMS malfunc-

tions may occur for a variety of reasons,

including the installation of replacement or

alternate tires or wheels on the vehicle that

prevent the TPMS from functioning properly.

The system checks the tire pressure and the tire

temperature of the tires installed on the vehicle by

means of a tire pressure sensor.

The tire pressure and the tire temperature appear

in the on-board computer (/ page 299).

If there is a substantial pressure loss or if the tire

temperature is excessive, you will be warned with

display messages (/ page 380) or the h

warning lamp in the instrument cluster

(/ page 400).

The tire pressure monitoring system is only an aid.

It is the driver's responsibility to set the tire pres-

sure to the recommended cold tire pressure suita-

ble for the operating situation.

In most cases, the tire pressure monitoring sys-

tem will automatically update the new reference

values aer you have changed the tire pressure.

You can, however, also update the reference val-

ues by restarting the tire pressure monitoring sys-

tem manually (/ page 300).

Syst

System limitsem limits

The system may be impaired or may not function

particularly in the following situations:

Incorrect reference values were taught in

Sudden pressure loss caused by a foreign

object penetrating the tire, for example

There is a malfunction caused by another

radio signal source

Chec

Checking tking the tirhe tire pre pressuressure wite with th the tirhe tire pre pressureessure

monitmonitororing systing systemem

RReqequiruirements:ements:

The vehicle is switched on.

On-board computer:

Service

Tires

One of the following displays appears:

Current tire pressure and tire temperature of

the individual wheels:

Wheels and tires

299

Tire pressure will be displayed after driving a

few minutes

Tire Pressure Monitor Active: the teach-in

process of the system is not yet complete. The

tire pressures are already being monitored.

Compare the tire pressure with the recom-

mended tire pressure for the current operating

condition (/ page 297). Additionally, observe

the notes on cold tires (/ page 295).

The values displayed in the on-board com-

puter may deviate from those of the tire pres-

sure gauge as they refer to sea level. At high

elevations, the tire pressure values indicated

by a pressure gauge are higher than those

shown by the on-board computer. In this case,

do not reduce the tire pressure.

Restestararting tting the tirhe tire pre pressuressure monite monitororing systing systemem

RReqequiruirements:ements:

The recommended tire pressure is correctly

set for the respective operating status on all of

the wheels (/ page 295).

Restart the tire pressure monitoring system in the

following situations:

The tire pressure has changed.

The wheels or tires have been changed or

newly installed.

On-board computer:

Service

Tires

Swipe downwards on Touch Control on the

le-hand side of the steering wheel.

The Use Current Pressures as New Refer-

ence Values

message is shown in the Instru-

ment Display.

To restart, press Touch Control on the le-

hand side of the steering wheel.

The Tire Press. Monitor Restarted message is

shown in the Instrument Display.

Current warning messages are deleted and

the yellow h warning lamp goes out.

Aer you have been driving for a few minutes,

the system checks whether the current tire

pressures are within the specied range. The

current tire pressures are then accepted as

reference values and monitored.

Be sure to also pay attention to the following rela-

ted topic:

Notes on tire pressure (/ page 295)

TTirire pre pressuressure loss we loss wararning systning systemem

FFunction of tunction of the tirhe tire pre pressuressure loss we loss wararning systning systemem

The tire pressure loss warning system warns the

driver by means of display messages when there

is a severe tire pressure loss.

300300

Wheels and tires

SystSystem limitsem limits

The system may be impaired or may not function

particularly in the following situations:

Incorrect reference values were taught in

Sudden pressure loss caused by a foreign

object penetrating the tire, for example

An even pressure loss on more than one tire

occurs

The system has a restricted or delayed function

particularly in the following situations:

Poor ground conditions, e.g. snow or gravel

Driving with snow chains

When adopting a very sporty driving style with

high cornering speeds or sudden acceleration

Driving with a high load

The tire pressure loss warning system is only an

aid. It is the driver's responsibility to set the tire

pressure to the recommended cold tire pressure

suitable for the operating situation and to check

it.

Be sure to also observe the following further rela-

ted subjects:

Notes on tire pressure (/ page 295)

Display messages about the tires

(/ page 380)

Restestararting tting the tirhe tire pre pressuressure loss we loss wararning systning systemem

RReqequiruirements:ements:

The recommended tire pressure is correctly

set for the respective operating status on all

wheels.

Restart the tire pressure loss warning system in

the following situations:

The tire pressure has changed.

The wheels or tires have been changed or

newly installed.

On-board computer:

Service

Tires

Swipe downwards on the Touch Control on the

le-hand side of the steering wheel.

The Tire Pressure Control System Active

Restart

message is shown in the display.

To begin restart, press the Touch Control on

the le-hand side of the steering wheel.

The Tire Pressure Now OK? message is shown

in the display.

Select Yes.

To conrm restart, press the Touch Control on

the le-hand side of the steering wheel.

The Run Flat Indicator Restarted message is

shown in the display.

Aer you have driven for a few minutes, the

tire pressure loss warning system monitors

the set tire pressures of all the tires.

Be sure to also pay attention to the following rela-

ted topic:

Notes on tire pressure (/ page 295)

Wheels and tires

301

Loading tLoading the vhe vehicleehicle

NNoottes on Tes on Tirire and Loading Infe and Loading Inforormation placardmation placard

WARNINGARNING Risk of accident from overloa-

ded tires

Overloaded tires may overheat and burst as a

consequence. Overloaded tires can also

impair the steering and handling characteris-

tics and lead to brake failure.

Observe the load rating of the tires.

The load rating must be at least half the

permissible axle load of the vehicle.

Never overload the tires by exceeding

the maximum load.

The Tire and Loading Information placard is on the

B-pillar on the driver's side of the vehicle.

Tire and Loading Information placard

The data shown in the illustration is example

data.

The Tire and Loading Information placard shows

the following information:

Maximum number of seats

2 according to

the maximum number of people permitted to

travel in the vehicle.

302302

Wheels and tires

Maximum permissible load

3 comprises the

gross weight of all vehicle occupants, load and

luggage.

Recommended tire pressure

1 for cold tires.

The recommended tire pressures are valid for

the maximum permissible load and up to the

maximum permissible vehicle speed.

Please also note:

Information on permissible weights and loads

on the vehicle identication plate

(/ page 329).

Information on tire pressure in the tire pres-

sure table (/ page 297).

Further related subjects:

Determining the maximum permissible load

(/ page 303)

Notes on tire pressure (/ page 295).

SStteps feps for Detor Deterermining Corrmining Correct Load Limitect Load Limit

The following steps have been developed as

required of all manufacturers under Title 49, Code

of U.S. Federal Regulations, Part 575, pursuant to

the "National Trac and Motor Vehicle Safety Act

of 1966".

(1):(1): Locate the statement “The combined

weight of occupants and cargo should never

exceed XXX kg or XXX lbs.” on your vehicle's

placard.

(2):(2): Determine the combined weight of the

driver and passengers that will be riding in

your vehicle.

(3):(3): Subtract the combined weight of the

driver and passengers from XXX kg or XXX lbs.

(4):(4): The resulting gure equals the available

amount of cargo and luggage load capacity.

For example, if the "XXX" amount equals

1,400 lbs. and there will be ve 150 lb pas-

sengers in your vehicle, the amount of availa-

ble cargo and luggage load capacity is

650 lbs. (1,400 - 750 (5 x 150) = 650 lbs.)

(5):(5): Determine the combined weight of lug-

gage and cargo being loaded on the vehicle.

That weight may not safely exceed the availa-

ble cargo and luggage load capacity calcula-

ted in Step 4.

(6):(6): If your vehicle will be towing a trailer, load

from your trailer will be transferred to your

vehicle. Consult this manual to determine how

this reduces the available cargo and luggage

load capacity of your vehicle.

Not all vehicles are permitted to tow a trailer.

Towing a trailer is only permitted if a trailer-

hitch is installed. Please consult an authorized

Mercedes-Benz dealer if you have any ques-

tions about towing a trailer with your vehicle.

Even if you have calculated the total load carefully,

you should still make sure that the maximum per-

missible gross weight and the maximum gross

axle weight rating of your vehicle are not excee-

ded. Details can be found on the vehicle identi-

cation plate.

Have your loaded vehicle – including driver,

occupants and load – weighed on a vehicle

weighbridge.

The measured values may not exceed the

maximum permissible values stated on the

vehicle identication plate.

Wheels and tires

303

Further related subjects:

Calculation example for determining the maxi-

mum load (/ page 304)

Tire and Loading Information placard

(/ page 302)

Tire pressure table (/ page 297)

Vehicle identication plate (/ page 329)

Calculation exCalculation examample fple for detor deterermining tmining the maximumhe maximum

loadload

The following table shows examples of how to cal-

culate total and load capacities with varying seat-

ing congurations and dierent numbers and

sizes of occupants. The following examples use a

maximum load of 1500 lbs (680 kg). This is fThis is foror

illusillustrtration puration purposes only.poses only. Make sure you are

using the actual load limit for your vehicle stated

on your vehicle's Tire and Loading Information

placard (/ page 302).

The higher the weight of all the occupants, the

smaller the maximum load for luggage.

Sttep 1ep 1

ExExamample 1ple 1 ExExamample 2ple 2

Combined maximum weight of occupants and

load (data from the Tire and Loading Information

placard)

1500 lbs (680 kg)1500 lbs (680 kg)

304304

Wheels and tires

SSttep 2ep 2

ExExamample 1ple 1 ExExamample 2ple 2

Number of people in the vehicle (driver and occu-

pants)

Distribution of the occupants Front: 2

Rear: 3

Front: 1

Weight of occupants Occupant 1: 150 lbs (68 kg)

Occupant 2: 180 lbs (82 kg)

Occupant 3: 160 lbs (73 kg)

Occupant 4: 140 lbs (63 kg)

Occupant 5: 120 lbs (54 kg)

Occupant 1: 200 lbs (91 kg)

Total weight of all occupants 750 lbs (340 kg) 200 lbs (91 kg)

SSttep 3ep 3

ExExamample 1ple 1 ExExamample 2ple 2

Permissible load (maximum gross vehicle weight

rating from the Tire and Loading Information plac-

ard minus the gross weight of all occupants)

1500 lbs (680 kg) Ò 750 lbs (340 kg) = 750 lbs

(340 kg)

1500 lbs (680 kg) Ò 200 lbs (91 kg) = 1300 lbs

(589 kg)

Wheels and tires

305

TTirire labelinge labeling

OvOverervieview of tirw of tire labelinge labeling

Uniform Tire Quality Grading Standards

DOT (Department of Transportation), (TIN)

Tire Identication Number

Maximum tire load (/ page 308)

Maximum tire pressure (/ page 308)

Manufacturer

Tire characteristics (/ page 309)

Tire size designation, load-bearing capacity,

speed rating and load index (/ page 309)

Tire name

The data shown in the illustration is example

data.

TTirire Quality Gre Quality Gradingading

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:

Tread wear grade

Traction grade

Temperature grade

The data shown in the illustration is example

data.

The classication is not legally stipulated for

Canada, but it is generally stated.

Trread wead wear grear gradeade

The treadwear grade is a comparative rating

based on the wear rate of the tire when tested

under controlled conditions on a specied govern-

ment test course. For example, a tire graded 150

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

306306

Wheels and tires

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 signicantly from the norm due to var-

iations in driving habits, service practices and dif-

ferences in road characteristics and climate.

Trraction graction gradeade

DANANGERGER Risk of accident due to inade-

quate traction

The traction grade assigned to this tire is

based on straight-ahead braking traction

tests.

Always adapt your driving style and drive

at a speed to suit the prevailing trac

and weather conditions.

NOOTETE Damage to the drivetrain from

wheelspin

Avoid wheelspin.

The traction grades, from highest to lowest, are

AA, A, B, and C. Those grades represent the tire's

ability to stop on wet pavement as measured

under controlled conditions on specied govern-

ment test surfaces of asphalt and concrete. A tire

marked C may have poor traction performance.

Tememperperaturature gre gradeade

WARNINGARNING Risk of accident from tire over-

heating and tire failure

Excessive speed, underination, or excessive

loading, either separately or in combination,

can cause excessive heat build-up and possi-

ble tire failure.

Observe the recommended tire pressure.

Regularly check the pressure of all the

tires.

Adjust the tire pressure, if necessary.

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

specied indoor laboratory test wheel. Sustained

high temperature can cause the material of the

tire to degenerate and reduce tire life, and exces-

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.

DOTDOT, T, Tiriree IdenticationIdentication Number (TIN)Number (TIN)

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.

Wheels and tires

307

The data shown in the image is example data.

The TIN is a unique identication number to iden-

tify tires and comprises the following:

DOT (DeparT (Department of Trtment of Transportansportation):ation): tire sym-

bol marks 1 indicating that the tire complies

with the requirements of the US Department

of Transportation.

Manuf

Manufacturacturerer identicationidentication code:code: manufac-

turer identication 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 313).

Tirire size:e size: identier 3 describes the tire size.

Tirire type code:e type code: tire type code 4 can be used

by the manufacturer as a code to describe

specic characteristics of the tire.

Manuf

Manufacturacturing dating date:e: 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).

InfInforormation on tmation on the maximum tirhe maximum tire loade load

The data shown in the image 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 302).

SpecicationsSpecications ffor maximum tiror maximum tire pre pressureessure

The data shown in the illustration is example

data.

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 297).

308308

Wheels and tires

InfInforormation on tirmation on tire ce charharactactererisisticstics

The data shown in the image is example data.

This information describes the type of tire cord

and the number of layers in side wall

1 and

under tire tread

TTirire size designation, load-beare size designation, load-bearing capacitying capacity, speed, speed

rrating and load indexating and load index

WARNINGARNING Risk of injury through exceed-

ing the specied tire load-bearing capa-

city or the permissible speed rating

Exceeding the specied 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

approved for your vehicle model.

Observe the tire load rating and speed

rating required for your vehicle.

First letter(s)

Nominal tire width in millimeters

Aspect ratio in %

Tire code

Rim diameter

Load-bearing index

Speed rating

Load index

The data shown in the illustration is example

data.

Information about reading tire data can be

obtained from any qualied specialist workshop.

Wheels and tires

309

FFirsirst let letttter(s)er(s) 11::

Without: passenger vehicle tires according to

European manufacturing standards.

"P": passenger vehicle tires according to US

manufacturing standards.

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

facturing standards.

"T": compact emergency spare wheels with

high tire pressure that are only designed for

temporary use in an emergency.

Aspect r

Aspect ratioatio 33::

Ratio between tire height and tire width in percent

(tire height divided by tire width).

Tirire codee code 44 (tir(tire type):e type):

"R" radial tire

"D": bias ply tire

"B": bias belted tires

"ZR": radial tire with a maximum speed above

149 mph (240 km/h) (optional)

Rim diamet

Rim diameterer 55::

The diameter of the bead seat (not the diameter

of the rim ange). The rim diameter is specied in

inches (in).

Load-bear

Load-bearing indeing indexx 66::

Numerical code that species the maximum load-

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

to 1356 lbs (615 kg)).

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

specied load limit.

See also:

Maximum permissible load on the Tire and

Loading Information placard (/ page 302)

Maximum tire load (/ page 308)

Load index

Speed r

Speed ratingating 77::

Species the approved maximum speed of the

tire.

An electronic speed limiter prevents your

vehicle from exceeding a speed of 130 mph

(210 km/h).

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.

Summer tir

Summer tireses

IndexIndex Speed rSpeed ratingating

Qup to 100 mph (160 km/h)

Rup to 106 mph (170 km/h)

Sup to 112 mph (180 km/h)

Tup to 118 mph (190 km/h)

Hup to 130 mph (210 km/h)

Vup to 149 mph (240 km/h)

Wup to 168 mph (270 km/h)

Yup to 186 mph (300 km/h)

310310

Wheels and tires

IndexIndex Speed rSpeed ratingating

ZR...Y

up to 186 mph (300 km/h)

ZR...(..Y)

over 186 mph (300 km/h)

over 149 mph (240 km/h)

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.

All-w

All-weateather tirher tires and wintes and winter tirer tireses

IndexIndex Speed rSpeed ratingating

Q M+S

up to 100 mph (160 km/h)

T M+S

up to 118 mph (190 km/h)

H M+S

up to 130 mph (210 km/h)

V M+S

up to 149 mph (240 km/h)

Winter tires bear the i snowake symbol and

fulll the requirements of the Rubber Manufactur-

ers Association (RMA) and the Rubber Association

of Canada (RAC) regarding the tire traction on

snow.

Load inde

Load indexx 88::

No specication given: standard load (SL) tire

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

forced tire

"Light Load": light load tire

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

maximum load that the tire can carry at a cer-

tain pressure

DenitionDenition of tof tererms fms for tiror tires and loadinges and loading

TTirire se strtructuructure and ce and charharactactererisistics:tics: 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:

Bar: metric unit for tire pressure. 14.5038 pounds

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

the equivalent of one bar.

DOT (DeparT (Department of Trtment of Transportansportation):ation): DOT-marked

tires fulll the requirements of the

US Department of Transportation.

Avereragage we weight of teight of the vhe vehicle occupants:ehicle occupants: the

number of vehicle occupants for which the vehicle

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

UUnifnifororm Tm Tirire Quality Gre Quality Grading Stading Standarandards:ds: a uniform

standard to grade the quality of tires with regard

"ZR" stated in the tire code.

Or "M+Si" for winter tires.

Wheels and tires

311

to tread quality, tire traction and temperature

characteristics. The quality grading assessment is

made by the manufacturer following specications

from the U.S. government. The quality grade of a

tire is imprinted on the side wall of the tire.

Recommended tirecommended tire pre pressuressure:e: the recommended

tire pressure is the tire pressure specied for the

tires mounted to the vehicle at the factory.

The tire and information table contains the recom-

mended tire pressures for cold tires, the maxi-

mum permissible load and the maximum permissi-

ble vehicle speed.

The tire pressure table contains the recommen-

ded tire pressures for cold tires under various

operating conditions, i.e. loading and/or speed of

the vehicle.

Incr

Increased veased vehicle wehicle weight due teight due to opo optional eqtional equip-uip-

ment:ment: the combined weight of all standard and

optional equipment available for the vehicle,

regardless of whether it is actually installed on the

vehicle or not.

Rim:

Rim: the part of the wheel on which the tire is

installed.

GAAWR (GrWR (Gross Axle Woss Axle Weight Reight Rating):ating): the GAWR is

the maximum permissible axle load. The actual

load on an axle must never exceed the gross axle

weight rating. The gross axle weight rating can be

found on the vehicle identication plate on the

B‑pillar on the driver's side.

Speed r

Speed rating:ating: the speed rating is part of the tire

identication. It species the speed range for

which a tire is approved.

GVW (GrVW (Gross Voss Vehicle Wehicle Weight):eight): the gross vehicle

weight comprises the weight of the vehicle includ-

ing fuel, tools, the spare wheel, accessories instal-

led, occupants, luggage and the trailer drawbar

noseweight, if applicable. The gross vehicle weight

must not exceed the gross vehicle weight rating

GVWR as specied on the vehicle identication

plate on the B‑pillar on the driver's side.

GVWR (GrVWR (Gross Voss Vehicle Wehicle Weight Reight Rating):ating): the GVWR is

the maximum permitted gross weight of the fully

laden vehicle (weight of the vehicle including all

accessories, occupants, fuel, luggage and the

trailer drawbar noseweight if applicable). The

gross vehicle weight rating is specied on the

vehicle identication plate on the B‑pillar on the

driver's side.

Maximum w

Maximum weight of teight of the laden vhe laden vehicle:ehicle: the maxi-

mum weight is the sum of the curb weight of the

vehicle, the weight of the accessories, the maxi-

mum load and the weight of optional equipment

installed at the factory.

Kilopascal (kP

Kilopascal (kPa):a): metric unit for tire pressure.

6.9 kPa corresponds to 1 psi. Another unit for tire

pressure is bar. 100 kilopascal (kPa) equals 1 bar.

Load inde

Load index:x: in addition to the load-bearing index,

the load index may also be imprinted on the side

wall of the tire. This species the load-bearing

capacity of the tire more precisely.

Curb w

Curb weight:eight: the weight of a vehicle with standard

equipment including the maximum capacity of

fuel, oil and coolant. It also includes the air condi-

tioning system and optional equipment if these

are installed on the vehicle, but does not include

passengers or luggage.

Maximum tir

Maximum tire load:e load: the maximum tire load is the

maximum permissible weight in kilograms or lbs

for which a tire is approved.

Maximum per

Maximum permissible tirmissible tire pre pressuressure:e: maximum

permissible tire pressure for one tire.

312312

Wheels and tires

Maximum load on one tirMaximum load on one tire:e: maximum load on one

tire. This is calculated by dividing the maximum

axle load of one axle by two.

PSI (pounds per sq

PSI (pounds per squaruare ince inch):h): standard unit of

measurement for tire pressure.

Aspect r

Aspect ratio:atio: ratio between tire height and tire

width in percent.

Tirire pre pressuressure:e: pressure inside the tire applying an

outward force to every square inch of the tire. The

tire pressure is specied in pounds per square

inch (psi), in kilopascals (kPa) or in bar. The tire

pressure should only be corrected when the tires

are cold.

Cold tir

Cold tire pre pressuressure:e: the tires are cold when the

vehicle has been parked for at least 3 hours with-

out direct sunlight on the tires or the vehicle has

been driven for less than 1 mile (1.6 km).

Tirire conte contact surfact surface:ace: the part of the tire that

comes into contact with the road.

Tirire bead:e bead: the purpose of the tire bead is to

ensure that the tire sits securely on the wheel rim.

There are several wire cores in the tire bead to

prevent the tire from changing length on the

wheel rim.

Side w

Side wall:all: the part of the tire between the tread

and the tire bead.

Weight of opeight of optional eqtional equipment:uipment: the combined

weight of the optional equipment weighing more

than the replaced standard parts and more than

5 lbs (2.3 kg). This optional equipment, such as

high-performance brakes, level control system, a

roof luggage rack or high-performance batteries,

is not included in the curb weight and the weight

of the accessories.

TIN (T

TIN (Tiriree IdenticationIdentication Number):Number): a unique identi-

cation number which can be used by a tire manu-

facturer to identify tires, for example, in a product

recall, and thus identify the purchasers. The TIN is

made up of the manufacturer's identity code, tire

size, tire type code and the manufacturing date.

Load-bear

Load-bearing indeing index:x: the load-bearing index is a

code that contains the maximum load-bearing

capacity of a tire.

Traction:action: traction is the grip resulting from friction

between the tires and the road surface.

WWear indicatear indicator:or: narrow bars (tread wear bars) that

are distributed over the tire contact surface. If the

tire tread is level with the bars, the wear limit of

1/16 in (1.6 mm) has been reached.

Dis

Distrtribution of vibution of vehicle occupants:ehicle occupants: distribution of

vehicle occupants over designated seat positions

in a vehicle.

Maximum per

Maximum permissible paymissible payload wload weight:eight: nominal

load and luggage load plus 150 lb (68 kg) multi-

plied by the number of seats in the vehicle.

Changing a wheelChanging a wheel

NNoottes on selecting, instes on selecting, installing and ralling and replacing tireplacing tireses

NOOTETE Mercedes-AMG vehicles

Observe the notes in the Supplement.

You could otherwise fail to recognize

dangers.

WARNINGARNING Risk of accident due to incor-

rect wheel and tire dimensions

If wheels and tires of the wrong size are instal-

led, the service brakes or components in the

Wheels and tires

313

brake system and in the wheel suspension

may be damaged.

Always replace wheels and tires with

ones that fulll the specications of the

original part.

For wheels, pay attention to the following:

Designation

Type

For tires, pay attention to the following:

Designation

Manufacturer

Type

WARNINGARNING Risk of injury through exceed-

ing the specied tire load-bearing capa-

city or the permissible speed rating

Exceeding the specied 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

approved for your vehicle model.

Observe the tire load rating and speed

rating required for your vehicle.

NOOTETE Vehicle and tire damage caused by

non-approved tire types and sizes

For safety reasons, only use tires, wheels and

accessories which have been specially

approved by Mercedes-Benz for your vehicle.

These tires are specially adapted to the active

safety systems, such as ABS, ESP

and

4MATIC, and marked as follows:

MO = Mercedes-Benz Original

MOE = Mercedes-Benz Original Extended

(run-at tires only for certain wheels)

MO1 = Mercedes-Benz Original (only cer-

tain AMG tires)

Otherwise, certain properties, such as han-

dling characteristics, vehicle noise emissions,

consumption, etc. could be adversely aec-

ted. Furthermore, other tire sizes could result

in the tires rubbing against the body and axle

components when loaded. This could result in

damage to the tire or the vehicle.

Only use tires, wheels and accessories that

have been checked and recommended by

Mercedes-Benz.

NOOTETE Risk to driving safety from retrea-

ded tires

Retreaded tires are neither tested nor recom-

mended by Mercedes-Benz, since previous

damage cannot always be detected on retrea-

ded tires.

For this reason driving safety cannot be guar-

anteed.

Do not use used tires if you have no

information about their previous usage.

NOOTETE Possible wheel and tire damage

when driving over obstacles

Large wheels have a smaller section width. As

the section width decreases, the risk of

314314

Wheels and tires

wheels and tires being damaged when driving

over obstacles increases.

Avoid obstacles or drive especially care-

fully.

Reduce your speed when driving over

curbs, speed bumps, manhole covers

and potholes.

Avoid particularly high curbs.

NOOTETE Possible wheel and tire damage

when parking on curbs or in potholes

Parking on curbs or in potholes may damage

the wheels and tires.

If possible, park only on at surfaces.

Avoid curbs and potholes when parking.

NOOTETE Damage to electronic component

parts due to the use of tire-installing tools

VVehicles witehicles with tirh tire pre pressuressure monite monitororing sying sys-s-

ttem:em: There are electronic component parts in

the wheel.

If tire-installing tools are positioned in the area

of the valve, the electronic components could

be damaged.

Tire-installing tools should not be applied

in the area of the valve.

Always have tires change at a qualied

specialist workshop.

NOOTETE Damage to summer tires at low

ambient temperatures

At low ambient temperatures, tears could form

when driving with summer tires, causing per-

manent damage to the tires.

At temperatures below 45 °F (7 °C) use

i M+S tires.

Accessory parts which are not approved for your

vehicle by Mercedes-Benz, or which are not used

correctly, can impair the operating safety.

Before purchasing and using non-approved acces-

sories, visit a qualied specialist workshop and

inquire about:

Suitability

Legal stipulations

Factory recommendations

WARNINGARNING Risk of accident with high per-

formance tires

The special tire tread in combination with the

optimized tire compound means that the risk

of skidding and hydroplaning on wet roads is

increased.

In addition, the tire grip is greatly reduced at a

low outside temperature and tire running tem-

perature.

Switch on the ESP

and adapt your driv-

ing style accordingly.

Use i M+S tires at outside tempera-

tures of less than 50 °F (10 °C).

Only use the tires for their intended pur-

pose.

Wheels and tires

315

Observe the following when selecting, installing

and replacing tires:

Furthermore, the use of certain tire types in

certain regions and areas of operation can be

highly benecial.

Only use tires and wheels of the same type

(summer tires, winter tires, MOExtended tires)

and the same make.

Only install wheels of the same size on one

axle (le and right).

It is only permissible to install a dierent

wheel size in the event of a at tire in order to

drive to the specialist workshop.

Vehicles witehicles with a tirh a tire pre pressuressure monite monitororing sying sys-s-

ttem:em: All installed wheels must be equipped

with functioning sensors for the tire pressure

monitoring system.

At temperatures below 45 °F (7 °C) use win-

ter tires or all-season tires marked i M+S

for all wheels.

Winter tires provide the best possible grip in

wintry road conditions.

For M+S tires, only use tires with the same

tread.

Observe the maximum permissible speed for

the M+S tires installed.

If the tire's maximum speed is below that of

the vehicle, this must be indicated by an

appropriate label in the driver's eld of vision.

Break in new tires at moderate speeds for the

rst 60 miles (100 km).

Replace the tires aer six years at the latest,

regardless of wear.

When r

When replacing witeplacing with tirh tires tes that do nohat do not ft featureaturee

rrun-atun-at ccharharactactererisistics:tics: vehicles with

MOExtended tires are not equipped with a

TIREFIT kit at the factory. Equip the vehicle

with a TIREFIT kit aer replacing with tires that

do not feature run-at characteristics, e.g.

winter tires.

For more information on wheels and tires, contact

a qualied specialist workshop.

Be sure to also observe the following further rela-

ted subjects:

Notes on tire pressure (/ page 295)

Tire and Loading Information placard

(/ page 302)

Tire size designation, load-bearing capacity,

speed rating and load index (/ page 309)

Tire pressure table (/ page 297)

Notes on the emergency spare wheel

(/ page 323)

NNoottes on rotes on rotating tating the wheelshe wheels

WARNINGARNING Risk of injury through dierent

wheel sizes

Rotating the front and rear wheels can

severely impair the driving characteristics.

The wheel brakes or suspension components

may also be damaged.

Rotate front and rear wheels only if the

wheels and tires are of the same dimen-

sions.

The wear patterns on the front and rear wheels

dier:

Front wheels wear more on the tire shoulder

316316

Wheels and tires

Rear wheels wear more in the center of the

tire

Do not drive with tires that have too little tread

depth. This signicantly reduces traction on wet

roads (hydroplaning).

On vehicles that have the same size front and rear

wheels, rotate the wheels according to the inter-

vals in the tire manufacturer's warranty book in

your vehicle documents. If this is not available,

rotate the tires every 3,000 to 6,000 miles

(5,000 to 10,000 km), depending on the wear.

Ensure that the direction of rotation is main-

tained.

Observe the instructions and safety notes on

"Changing a wheel" when doing so (/ page 318).

NNoottes on stes on stororing wheelsing wheels

When storing wheels, observe the following notes:

Aer removing wheels, store them in a cool,

dry and preferably dark place.

Protect the tires from contact with oil, grease

or fuel.

OvOverervieview of tw of the tirhe tire-ce-changhange te tool kitool kit

NOOTETE Mercedes-AMG vehicles

Observe the notes in the Supplement.

You could otherwise fail to recognize

dangers.

Apart from some country-specic variants, vehi-

cles are not equipped with a tire-change tool kit.

For more information on which tire-changing tools

are required and approved for performing a wheel

change on your vehicle, consult a qualied spe-

cialist workshop.

You require the following tools, for example, to

change a wheel:

Jack

Chock

Lug wrench

Alignment bolt

The tire-change tool kit is located in tool bag

in the trunk.

Depending on the vehicle equipment, the tool

bag may be located at other positions in the

trunk.

The tool bag contains:

Jack

Gloves

Lug wrench

Alignment bolt

Folding chock

Ratchet for jack

Wheels and tires

317

PrPrepareparing ting the vhe vehicle fehicle for a wheel cor a wheel changehange

RReqequiruirements:ements:

The vehicle is not on a slope.

The vehicle is on solid, non-slippery and level

ground.

The required tire-change tool kit is available.

If your vehicle is not equipped with the tire-

change tool kit, consult a qualied specialist

workshop to nd out about suitable tools.

Apply the electric parking brake manually.

Move the front wheels to the straight-ahead

position.

VVehicles witehicles with auth automatic tromatic transmission:ansmission: Shi to

position j.

Switch o the vehicle.

Make sure that the vehicle cannot be started.

Place chocks or other suitable items under the

front and rear of the wheel that is diagonally

opposite the wheel you wish to change.

If necessary, remove the wheel trim/hub caps

(/ page 318).

Raise the vehicle (/ page 319).

RRemoemoving and instving and installing talling the wheel trhe wheel trim/hub capsim/hub caps

RReqequiruirements:ements:

The vehicle is prepared for a wheel change

(/ page 318).

Wheel tr

Wheel trimim

The wheel trim covers the wheel bolts on vehicles

with steel wheels. Before unscrewing the wheel

bolts, remove the wheel trim.

TTo ro removemove:e: using both hands, carefully reach

into two wheel trim openings and remove the

wheel trim.

Plas

Plastic hub captic hub cap

TTo ro removemove:e: turn the center cover of the hub

cap counter-clockwise and remove the hub

cap.

TTo insto install:all: make sure that the center cover of

the hub cap is turned counter-clockwise.

Position the hub cap and turn the center cover

clockwise until the hub cap engages physically

and audibly.

Aluminum hub cap

TTo ro removemove:e: position socket 2 from the tire-

change tool kit on hub cap

Position wheel wrench 3 on socket 2.

318318

Wheels and tires

Using wheel wrench 3, turn hub cap 1

counter-clockwise and remove it.

TTo insto install:all: follow the instructions above in

reverse order.

SpeciedSpecied tighttightening tening torqorque:ue: 18 lb- (25 Nm).

RRaising taising the vhe vehicle when cehicle when changing a wheelhanging a wheel

RReqequiruirements:ements:

There are no persons in the vehicle.

The vehicle has been prepared for a wheel

change (/ page 318).

Important notes on using the jack:

Use only a vehicle-specic jack that has been

approved by Mercedes-Benz to raise the vehi-

cle.

The jack is only designed for raising and hold-

ing the vehicle for a short time while a wheel

is being changed and not for maintenance

work under the vehicle.

The jack must be placed on a rm, at and

non-slip surface. If necessary, use a large, at,

load-bearing, non-slip underlay.

The foot of the jack must be positioned verti-

cally under the jack support point.

Rules of conduct when the vehicle is raised:

Never place your hands or feet under the vehi-

cle.

Never lie under the vehicle.

Do not start the vehicle and do not release the

electric parking brake.

Do not open or close any doors or the trunk

lid.

Using the lug wrench, loosen the wheel bolts

on the wheel you wish to change by about one

full turn. Do not unscrew the screws com-

pletely.

Wheels and tires

319

Position of jack support points

NOOTETE Mercedes-AMG vehicles

Observe the notes in the Supplement.

You could otherwise fail to recognize

dangers.

WARNINGARNING Risk of injury from incorrect

positioning of the jack

If you do not position the jack correctly at the

appropriate jacking point of the vehicle, the

jack could tip with the vehicle raised.

Only position the jack at the appropriate

jacking point of the vehicle. The base of

the jack must be positioned vertically

under the jacking point of the vehicle.

NOOTETE Vehicle damage from the jack

If you do not position the jack correctly at the

appropriate jack support point of the vehicle,

the jack could tip over with the vehicle raised.

The jack is designed exclusively for jack-

ing up the vehicle at the jack support

points.

Take the ratchet out of the tire-change tool kit

and place it on the hexagon nut of the jack so

that the letters "AUF" are visible.

Position support 2 of jack 4 on jack sup-

port point

If there is a total loss of pressure in a tire, it

may be possible that the jack cannot be posi-

tioned at jack support point

1. In this case,

unload the vehicle.

320320

Wheels and tires

Turn ratchet 3 clockwise until support 2

sits completely on jack support point 1 and

the base of the jack lies evenly on the ground.

Turn ratchet 3 until the tire is raised a maxi-

mum of 1.2 in (3 cm) from the ground.

Loosen and remove the wheel (/ page 321).

RRemoemoving a wheelving a wheel

RReqequiruirements:ements:

The vehicle is raised (/ page 319).

NOTETE Mercedes-AMG vehicles

Observe the notes in the Supplement.

You could otherwise fail to recognize

dangers.

When changing a wheel, avoid applying any force

to the brake discs, as this could impair the level of

comfort when braking.

NOOTETE Damage to threading from dirt on

wheel bolts

Do not place wheel bolts in sand or on a

dirty surface.

Unscrew the uppermost wheel bolt com-

pletely.

Screw alignment bolt 1 into the thread

instead of the wheel bolt.

Unscrew the remaining wheel bolts com-

pletely.

Remove the wheel.

InstInstalling a nealling a new wheelw wheel

RReqequiruirements:ements:

The wheel to be changed is removed and the

alignment bolt is screwed in (/ page 321).

NOTETE Mercedes-AMG vehicles

Observe the notes in the Supplement.

You could otherwise fail to recognize

dangers.

WARNINGARNING Risk of accident from losing a

wheel

Oiled, greased or damaged wheel bolt/wheel

nut threads or wheel hub/wheel mounting

bolt threads can cause the wheel bolts/wheel

nuts to come loose.

As a result, you could lose a wheel while driv-

ing.

Never oil or grease the threads.

In the event of damage to the threads,

contact a qualied specialist workshop

immediately.

Wheels and tires

321

Have the damaged wheel bolts or dam-

aged hub threads replaced.

Do not continue driving.

Observe the information on the choice of tires

(/ page 313).

For tires with a specied direction of rotation, an

arrow on the side wall of the tire indicates the cor-

rect direction of rotation. Observe the direction of

rotation when installing.

Slide the wheel to be mounted onto the align-

ment bolt and push it on.

WARNINGARNING Risk of injury from tightening

wheel bolts and nuts

If you tighten the wheel bolts or wheel nuts

when the vehicle is raised, the jack could tip.

Only tighten wheel bolts or wheel nuts

when the vehicle is on the ground.

Be sure to observe the instructions and safety

notes on "Changing a wheel" (/ page 313).

For safety reasons, only use wheel bolts which

have been approved by Mercedes-Benz and

for the wheel in question.

NOOTETE Damage to paintwork of the wheel

rim when screwing in the rst wheel bolt

If the wheel has too much play when screwing

in the rst wheel bolt, the wheel rim paint can

be damaged.

Press the wheel rmly against the wheel

hub when screwing in the rst wheel

bolt.

Tighten the wheel bolts evenly in a diagonal

pattern in the order indicated until they are

nger-tight.

Unscrew and remove the alignment bolt.

Tighten the last wheel bolt until it is nger-

tight.

Lower the vehicle (/ page 322).

LowLowerering ting the vhe vehicleehicle aeraer a wheel ca wheel changehange

RReqequiruirements:ements:

The new wheel has been installed

(/ page 321).

TTo lowo lower ter the vhe vehicle:ehicle: place the ratchet onto

the hexagon nut of the jack so that the letters

"AB" are visible and turn counter-clockwise.

Tighten the wheel bolts evenly in a diagonal

pattern in the order indicated

1 to 5 with

an initial maximum force of 59 lb- (80 Nm).

Tighten the wheel bolts evenly in a diagonal

pattern in the order indicated 1 to 5 with

322322

Wheels and tires

the specied tightening torque of 96 lb-

(130 Nm).

WARNINGARNING Risk of accident due to incor-

rect tightening torque

The wheels could come loose if the wheel

bolts or wheel nuts are not tightened to the

prescribed torque.

Ensure that the wheel bolts or wheel

nuts are tightened to the prescribed

tightening torque.

If you are not sure, do not move the vehi-

cle. Contact a qualied specialist work-

shop and have the tightening torque

checked immediately.

Check the tire pressure of the newly installed

wheel and adjust it if necessary.

The following does not apply if the new wheel

is an emergency spare wheel.

VVehicles witehicles with tirh tire pre pressuressure loss we loss wararning syning sys-s-

ttem:em: Restart the tire pressure loss warning

system (/ page 301).

VVehicles witehicles with a tirh a tire pre pressuressure monite monitororing sying sys-s-

ttem:em: Restart the tire pressure monitoring sys-

tem (/ page 300).

EmergEmergency sparency spare wheele wheel

NNoottes on tes on the emerghe emergency sparency spare wheele wheel

WARNINGARNING Risk of accident caused by

incorrect wheel and tire dimensions

The wheel or tire sizes and the tire type of the

emergency spare wheel or spare wheel and

the wheel to be replaced may dier. The emer-

gency spare wheel or spare wheel can signi-

cantly impair driving characteristics of the

vehicle.

To prevent hazardous situations:

Drive carefully.

Never install more than one emergency

spare wheel or spare wheel that diers

in size.

Only use an emergency spare wheel or

spare wheel briey.

Do not deactivate ESP

Have the emergency spare wheel or

spare wheel of a dierent size replaced

at the nearest qualied specialist work-

shop. The new wheel must have the cor-

rect dimensions.

The emergency spare wheel is secured in the

emergency spare wheel bag in the trunk.

Observe the following notes on installing an emer-

gency spare wheel:

The maximum permissible speed with an

emergency spare wheel installed is 50 mph

(80 km/h).

Do not equip the emergency spare wheel with

snow chains.

Replace the emergency spare wheel aer six

years at the latest, regardless of wear.

Check the tire pressure of the emergency

spare wheel installed. Correct the pressure as

necessary.

The specied tire pressure is stated on the

label of the emergency spare wheel.

Wheels and tires

323

VVehicles witehicles with a tirh a tire pre pressuressure loss we loss wararning syning sys-s-

ttem:em: If an emergency spare wheel is installed,

the tire pressure loss warning system cannot

function reliably. Only restart the system

again when the emergency spare wheel has

been replaced with a new wheel.

VVehicles witehicles with a tirh a tire pre pressuressure monite monitororing sying sys-s-

ttem:em: If an emergency spare wheel is installed,

the tire pressure monitoring system cannot

function reliably. For a few minutes aer an

emergency spare wheel is installed, the sys-

tem may still display the tire pressure of the

removed wheel. Only restart the system again

when the emergency spare wheel has been

replaced with a new wheel.

Be sure to also observe the following further rela-

ted subjects:

Notes on tire pressure (/ page 295)

Tire and Loading Information placard

(/ page 302)

Tire pressure table (/ page 297)

Notes on installing tires (/ page 313)

Installing an emergency spare wheel

(/ page 318)

InatingInating tthe emerghe emergency sparency spare wheele wheel

NOOTETE Overheating due to the tire ination

compressor running too long

Do not run the tire ination compressor

for longer than ten minutes without inter-

ruption.

RReqequiruirements:ements:

Comply with the manufacturer's safety notes on

the sticker of the emergency spare wheel and on

the tire ination compressor.

Remove the sticker with the label 50 mph

(80 km/h) from the tire ination compressor

housing and ax it to the instrument cluster

within the driver's eld of vision.

Remove the tire ination compressor from the

storage well under the trunk oor

(/ page 277).

Pull ller hose 1 and plug 3 out of the tire

ination compressor housing.

Insert plug 7 of ller hose 1 in the socket

on the tire ination compressor and then turn

it until plug

7 engages.

Unscrew the cap from the valve on the emer-

gency spare wheel.

Screw union nut 2 of ller hose 1 onto

valve.

Make sure on and o switch 4 of the tire

ination compressor is set to 0

Insert plug 3 in a socket in your vehicle.

12 V socket (/ page 108)

324324

Wheels and tires

Observe the notes on sockets (/ page 108).

Press the start/stop button once to switch on

the power supply (/ page 130).

Press on and o switch 4 on the tire ination

compressor to I

The tire ination compressor is switched on.

The tire is inated. The tire pressure is shown

on manometer 5.

Pump the tire to the specied tire pressure.

The specied tire pressure is stated on the

label of the emergency spare wheel.

When the specied tire pressure has been

reached, press on and o switch 4 on the

tire ination compressor to 0

The tire ination compressor is switched o.

Press the start/stop button to switch o the

power supply.

If the tire pressure is higher than the specied

pressure, press pressure release valve button

6 until the correct tire pressure has been

reached.

Unscrew union nut 2 of ller hose 1 from

the valve.

Screw the valve cap of the emergency spare

wheel onto the valve again.

Store ller hose 1 and plug 3 in the lower

section of the tire ination compressor hous-

ing.

Store the tire ination compressor in the vehi-

cle.

Wheels and tires

325

Wheels and tires for Your Mercedes CLA 4 Door Second Generation (2019-2024)

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