Get Wheels and tires Guide for Mercedes A Class 4 Door Third Generation (2018-2026)

Wheels and tires

292

R

Visually inspect wheels and tires for damage.

Check the valve caps.

Notes on noise or unusual handling charaacteris-

tics

&

WARNING Risk of hydroplaning due to

insuꢁcient tire tread

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.

Visual check of the tire tread depth and the

tire contact surface across the entire width.

Insuꢁcient tire tread will result in reduced tire

grip.

The minimum tread depth for summer tires is

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

In heavy rain or slush the risk of hydroplaning

is increased, in particular where speed is not

adapted to suit the conditions.

If you suspect that a tire is malfunctioning, reduce

your speed immediately and have the tires and

wheels checked at a qualiꢀed specialist workshop.

#

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:

Notes on regularly inspecting wheels and tires

R

Summer tires: â in (3 mm)

R

&

M+S tires: ãin (4 mm)

WARNING Risk of injury through damaged

tires

#

For safety reasons, replace the tires

before the legally-prescribed limit for the

minimum tread depth is reached.

Damaged tires can cause tire pressure loss.

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.

#

Check the tires regularly for signs of

damage and replace any damaged tires

immediately.

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 oꢂ-

road:

R

Check the tire pressure (/ page 293).

Wheels and tires

293

You can deactivate ESP^®to pull away

(/ page 159). This allows the wheels to spin,

achieving an increased driving force.

%

Notes on snow chains

*

NOTE Damage to the wheel trim from

mounted snow chains

&

WARNING Risk of accident due to incor-

rectly installed snow chains

If snow chains are mounted to steel wheels,

the wheel trims can be damaged.

If you have installed snow chains to the rear

wheels, they may drag against the vehicle

body or chassis components.

Tire preessurre

#

Remove the wheel trims of steel wheels

before mounting snow chains.

Notes on tire pressure

#

Never install snow chains on the rear

wheels.

Observe the following notes when using snow

chains:

&

WARNING Risk of accident due to insuꢁ-

cient or excessive tire pressure

#

Only install snow chains on the front

wheels in pairs.

R

Snow chains are only permissible for certain

Underinꢃated or overinꢃated tires pose in par-

ticular the following risks:

wheel/tire combinations. You can obtain infor-

mation about this from an authorized

Mercedes-Benz Center.

R

The tires can burst.

*

NOTE Damage to vehicle body or suspen-

sion components caused by installed

snow chains

R

The tires can wear excessively and/or

unevenly.

R

For safety reasons, only use snow chains that

have been speciꢀcally approved for your vehi-

cle by Mercedes-Benz, or snow chains with

the same quality standard.

R

The driving characteristics as well as the

steering and braking characteristics may

be greatly impaired.

On 4MATIC vehicles, if you install snow chains

on the rear wheels, you can damage vehicle

body or suspension components.

R

If snow chains are installed, the maximum per-

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

#

Comply with the recommended tire pres-

sures and check the tire pressure of all

tires, including the spare wheel, regu-

larly:

#

On 4MATIC vehicles, only install snow

chains on the front wheels.

R

Vehicless with Actiive Parkingg Assist: Do not

use Active Parking Assist when snow chains

are installed.

Wheels and tires

294

Tire pressure which is too low can cause:

R

Monthly

&

WARNING Risk of accident due to repea-

ted pressure drop in the tires

R

Tire malfunctions as a result of overheating

When the load changes

Before embarking on a longer journey

R

Impaired handling characteristics

The wheels, valves or tires could be damaged.

R

Irregular wear

Too low a tire pressure can lead to the tires

bursting.

If operating conditions change, e.g. oꢂ-

road driving

R

Increased fuel consumption

#

Examine the tires for foreign objects.

#

Adjust the tire pressure, if necessary.

&

WARNING Risk of accident due to too high

a tire pressure

#

Check whether the tire has a puncture or

the valve has a leak.

Tire pressure which is too high or too low can:

Tires with excessively high pressure can burst.

#

R

If you are unable to rectify the damage,

contact a qualiꢀed specialist workshop.

Shorten the service life of the tires.

In addition, they also suꢂer from irregular

wear, which can signiꢀcantly impair the brak-

ing properties and the handling characteris-

tics.

R

Cause increased tire damage.

R

Adversely aꢂect driving characteristics and

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

You can ꢀnd information on tire pressure for the

vehicle's factory-installed tires on the following

labels:

#

Avoid excessively high tire pressures.

&

WARNING Risk of accident due to too low

a tire pressure

R

Tire and Loading Information placard on the

B‑pillar of your vehicle (/ page 300).

Tire pressure which is too high can cause:

Tires with pressure that is too low can over-

heat and burst as a consequence.

R

Increased braking distance

R

Tire pressure table on the inside of the fuel

ꢀller ꢃap (/ page 295).

R

Impaired handling characteristics

In addition, they also suꢂer from irregular

wear, which can signiꢀcantly impair the brak-

ing properties and the handling characteris-

tics.

R

Irregular wear

Observe the maximum tire pressure

(/ page 306).

R

Impaired driving comfort

Use a suitable pressure gauge to check the tire

pressure. The outer appearance of a tire does not

R

Susceptibility to damage

#

Avoid excessively low tire pressure.

Wheels and tires

295

permit any reliable conclusion about the tire pres-

sure.

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.

malfunction, which can cause tire pressure

loss.

Only correct tire pressure when the tires are cold.

Conditions for cold tires:

#

Only screw standard valve caps or valve

caps speciꢀcally approved by Mercedes-

Benz for your vehicle onto the tire valve.

R

The vehicle has been parked with the tires out

of direct sunlight for at least three hours.

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.

R

The vehicle has traveled less than 1 mile

(1.6 km).

Tire pressure table

The tire pressure table is on the inside of the fuel

ꢀller ꢃap.

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

temperature of the tires increases, so too does

the tire pressure.

The load conditions "partially laden" and "fully

laden" are deꢀned in the table for diꢂerent num-

bers of passengers and amounts of luggage. The

actual number of seats may diꢂer from this.

%

The data shown in the images is example

data.

Vehicles with a tire pressure monitoring system:

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 aꢂect

the ride comfort.

&

WARNING 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

Wheels and tires

296

R

Checking the tiree pressure manually

Tire and Loading Information placard

(/ page 300)

#

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.

Tire pressure monitoringg system

Function of the tire pressure monitoring system

#

Remove the valve cap of the tire to be

checked.

&

DANGER Risk of accident due to incorrect

tire pressure

#

Press the tire pressure gauge securely onto

the valve.

Each tire, including the spare (if provided),

should be checked monthly when cold and

inꢃated to the inꢃation pressure recommen-

ded by the vehicle manufacturer on the vehi-

cle placard or tire inꢃation pressure label. (If

your vehicle has tires of a diꢂerent size than

the size indicated on the vehicle placard or

tire inꢃation pressure label, you should deter-

mine the proper tire inꢃation pressure for

those tires.)

#

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.

Some tire pressure tables only show the rim diam-

eter instead of the complete tire size, e.g. R18.

The rim diameter is part of the tire size and can

be found on the tire side wall (/ page 307).

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

signiꢀcantly under-inꢃated. Accordingly, when

#

R

Screw the valve cap onto the valve.

Tire and Loading Information placard

(/ page 300)

Further related subjects:

R

Maximum tire pressure (/ page 306)

R

Notes on tire pressure (/ page 293)

R

Tire pressure table (/ page 295)

Wheels and tires

297

values aꢄer 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 298).

the low tire pressure telltale illuminates, you

should stop and check your tires as soon as

possible, and inꢃate them to the proper pres-

sure. Driving on a signiꢀcantly under-inꢃated

tire causes the tire to overheat and can lead

to tire failure. Under-inꢃation also reduces fuel

eꢁciency and tire tread life, and may aꢂect

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-inꢃation has not

reached the level to trigger illumination of the

TPMS low tire pressure telltale.

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.

System limits

The system may be impaired or may not function

particularly in the following situations:

R

Incorrect reference values were taught in

The system checks the tire pressure and the tire

temperature of the tires installed on the vehicle by

means of a tire pressure sensor.

R

Sudden pressure loss caused by a foreign

object penetrating the tire, for example

R

There is a malfunction caused by another

radio signal source

The tire pressure and the tire temperature appear

in the on-board computer (/ page 297).

If there is a substantial pressure loss or if the tire

temperature is excessive, you will be warned with

display messages (/ page 379) or the h

warning lamp in the instrument cluster

(/ page 399).

Checking the tire pressure with the tire pressure

monitoring system

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 ꢃash for

approximately one minute and then remain

continuously illuminated. This sequence will

continue upon subsequent vehicle start-ups as

long as the malfunction exists.

Requirements:

R

The vehicle is switched on.

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.

On-board computer:

5

4

Service

One of the following displays appears:

Tires

R

Current tire pressure and tire temperature of

the individual wheels:

In most cases, the tire pressure monitoring sys-

tem will automatically update the new reference

Wheels and tires

298

#

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

do not reduce the tire pressure.

To restart, press Touch Control on the leꢄ-

hand side of the steering wheel.

The Tire Press. Monitor Restarted message is

shown in the Instrument Display.

Restarting the tire pressure monitoring system

Requirements:

R

The recommended tire pressure is correctly

Current warning messages are deleted and

the yellow h warning lamp goes out.

set for the respective operating status on all of

the wheels (/ page 293).

Aꢄer you have been driving for a few minutes,

the system checks whether the current tire

pressures are within the speciꢀed range. The

current tire pressures are then accepted as

reference values and monitored.

Restart the tire pressure monitoring system in the

following situations:

R

Tire pressure will be displayed after driving a

few minutes

R

The tire pressure has changed.

Be sure to also pay attention to the following rela-

ted topic:

R

The wheels or tires have been changed or

newly installed.

R

Tire Pressure Monitor Active: the teach-in

process of the system is not yet complete. The

tire pressures are already being monitored.

R

Notes on tire pressure (/ page 293)

On-board computer:

5

4

#

Service

Tires

Compare the tire pressure with the recom-

mended tire pressure for the current operating

condition (/ page 295). Additionally, observe

the notes on cold tires (/ page 293).

Tire pressure loss warning system

#

Swipe downwards on Touch Control on the

leꢄ-hand side of the steering wheel.

The Use Current Pressures as New Refer-

ence Values message is shown in the Instru-

ment Display.

Function of the tire pressure loss warning system

The tire pressure loss warning system warns the

driver by means of display messages when there

is a severe tire pressure loss.

%

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

Wheels and tires

299

#

System limits

Be sure to also observe the following further rela-

ted subjects:

To begin restart, press the Touch Control on

the leꢄ-hand side of the steering wheel.

The Tire Pressure Now OK? message is shown

in the display.

The system may be impaired or may not function

particularly in the following situations:

R

Notes on tire pressure (/ page 293)

R

Incorrect reference values were taught in

Display messages about the tires

(/ page 379)

#

Select Yes.

R

Sudden pressure loss caused by a foreign

object penetrating the tire, for example

To conꢀrm restart, press the Touch Control on

the leꢄ-hand side of the steering wheel.

The Run Flat Indicator Restarted message is

shown in the display.

Restarting the tire pressure loss warning system

R

An even pressure loss on more than one tire

occurs

Requirements:

R

The recommended tire pressure is correctly

The system has a restricted or delayed function

particularly in the following situations:

set for the respective operating status on all

wheels.

Aꢄer you have driven for a few minutes, the

tire pressure loss warning system monitors

the set tire pressures of all the tires.

R

Poor ground conditions, e.g. snow or gravel

Restart the tire pressure loss warning system in

the following situations:

Be sure to also pay attention to the following rela-

ted topic:

R

Driving with snow chains

R

When adopting a very sporty driving style with

high cornering speeds or sudden acceleration

The tire pressure has changed.

R

Notes on tire pressure (/ page 293)

R

The wheels or tires have been changed or

newly installed.

R

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.

On-board computer:

4

5

Service

Tires

#

Swipe downwards on the Touch Control on the

leꢄ-hand side of the steering wheel.

The Tire Pressure Control System Active

Restart message is shown in the display.

Wheels and tires

300

Loading the vehicle

Notes on Tirre and Loading Informatiion placard

&

WARNING 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.

1

Tire and Loading Information placard

#

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 data shown in the illustration is example

data.

The Tire and Loading Information placard is on the

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

The Tire and Loading Information placard shows

the following information:

R

Maximum number of seats 2 according to

the maximum number of people permitted to

travel in the vehicle.

Wheels and tires

301

#

R

Maximum permissible load 3 comprises the

gross weight of all vehicle occupants, load and

luggage.

the "National Traꢁc and Motor Vehicle Safety Act

of 1966".

(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.

#

(1): Locate the statement “The combined

weight of occupants and cargo should never

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

placard.

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.

%

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.

#

(2): Determine the combined weight of the

driver and passengers that will be riding in

your vehicle.

Please also note:

R

Information on permissible weights and loads

on the vehicle identiꢀcation plate

(/ page 327).

#

(3): Subtract the combined weight of the

driver and passengers from XXX kg or XXX lbs. Even if you have calculated the total load carefully,

you should still make sure that the maximum per-

#

(4): The resulting ꢀgure equals the available

R

Information on tire pressure in the tire pres-

sure table (/ page 295).

missible gross weight and the maximum gross

amount of cargo and luggage load capacity.

axle weight rating of your vehicle are not excee-

For example, if the "XXX" amount equals

ded. Details can be found on the vehicle identiꢀ-

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

Further related subjects:

cation plate.

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.)

R

Determining the maximum permissible load

(/ page 301)

#

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 identiꢀcation plate.

R

Notes on tire pressure (/ page 293).

#

(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.

Steps for Determining Correctt 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

Wheels and tires

302

Further related subjects:

Calculation example for determining the maximum illustration purposes only. Make sure you are

load

using the actual load limit for your vehicle stated

on your vehicle's Tire and Loading Information

placard (/ page 300).

R

Calculation example for determining the maxi-

mum load (/ page 302)

The following table shows examples of how to cal-

culate total and load capacities with varying seat-

ing conꢀgurations and diꢂerent numbers and

sizes of occupants. The following examples use a

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

R

Tire and Loading Information placard

(/ page 300)

The higher the weight of all the occupants, the

smaller the maximum load for luggage.

R

Tire pressure table (/ page 295)

Vehicle identiꢀcation plate (/ page 327)

Step 1

Example 1

Example 2

Combined maximum weight of occupants and

load (data from the Tire and Loading Information

placard)

1500 lbs (680 kg)

Wheels and tires

303

Step 2

Example 1

5

Example 2

1

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

Step 3

750 lbs (340 kg)

200 lbs (91 kg)

Example 2

Example 1

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

304

5

6

7

Manufacturer

Tire characteristics (/ page 307)

Tire size designation, load-bearing capacity,

Tire labeling

Overview of tire labeling

speed rating and load index (/ page 307)

Tire name

8

%

The data shown in the illustration is example

data.

Tire Quality Grading

1

2

3

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 wear grade

1

2

Uniform Tire Quality Grading Standards

DOT (Department of Transportation), (TIN)

Tire Identiꢀcation Number

Maximum tire load (/ page 306)

Maximum tire pressure (/ page 306)

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

3

4

Wheels and tires

305

well on the government course as a tire graded

100.

The traction grades, from highest to lowest, are

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

high temperature can cause the material of the

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.

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.

Temperature grade

Traction grade

&

WARNING Risk of accident from tire over-

heating and tire failure

&

DANGER Risk of accident due to inade-

quate traction

DOT, Tire Identiꢀcattion Nummber (TIN)

Excessive speed, underinꢃation, 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.

#

Always adapt your driving style and drive

at a speed to suit the prevailing traꢁc

and weather conditions.

#

Regularly check the pressure of all the

tires.

#

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

306

%

The data shown in the image is example data.

Informattion on the maximum tire load

Speciꢀcattions ffoor maximum tire pressure

The TIN is a unique identiꢀcation number to iden-

tify tires and comprises the following:

R

DOT (Department of Transportation): tire sym-

bol marks 1 indicating that the tire complies

with the requirements of the US Department

of Transportation.

R

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 311).

%

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.

R

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 295).

R

Tire type code: tire type code 4 can be used

by the manufacturer as a code to describe

speciꢀc characteristics of the tire.

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 300).

R

Manufacturing 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

307

Informaation on tire characteeristics

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

approved for your vehicle model.

1

2

3

4

5

6

7

8

First letter(s)

Nominal tire width in millimeters

Aspect ratio in %

Tire code

#

%

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.

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 qualiꢀed specialist workshop.

Wheels and tires

308

%

First letter(s) 1:

R

Without: passenger vehicle tires according to

Rim diameter 5:

An electronic speed limiter prevents your

vehicle from exceeding a speed of 130 mph

(210 km/h).

The diameter of the bead seat (not the diameter

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

inches (in).

European manufacturing standards.

R

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-beearing index 6:

R

"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)).

R

Summer tires

"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.

Index

Speed rating

Q

R

S

T

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)

Aspecct ratio 3:

Ratio between tire height and tire width in percent

(tire height divided by tire width).

See also:

R

Maximum permissible load on the Tire and

Loading Information placard (/ page 300)

Tire code 4 (tire type):

R

"R" radial tire

R

Maximum tire load (/ page 306)

R

"D": bias ply tire

H

V

W

Y

R

Load index

R

"B": bias belted tires

Speed rating 7:

Speciꢀes the approved maximum speed of the

tire.

R

"ZR": radial tire with a maximum speed above

149 mph (240 km/h) (optional)

Wheels and tires

309

R

All-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)

Deꢀnitiion 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.

R

Specifying the speed rating as the "ZR" index

in tire code 4 is optional for tires up to

186 mph (300 km/h).

Winter tires bear the i snowꢃake 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.

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.

Bar: metric unit for tire pressure. 14.5038 pounds

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

the equivalent of one bar.

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.

DOT (Department of Transportation): DOT-marked

tires fulꢀll the requirements of the

US Department of Transportation.

Load index 8:

R

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).

R

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

forced tire

R

"Light Load": light load tire

Uniform Tire Quality Gradding Standards: a uniform

standard to grade the quality of tires with regard

1

2

"ZR" stated in the tire code.

Or "M+Si" for winter tires.

Wheels and tires

310

to tread quality, tire traction and temperature

characteristics. The quality grading assessment is

made by the manufacturer following speciꢀcations load on an axle must never exceed the gross axle

GAWR (Gross Axle Weight Rating): the GAWR is

the maximum permissible axle load. The actual

Maximuum weight of the laden vehicle: 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.

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

tire is imprinted on the side wall of the tire.

weight rating. The gross axle weight rating can be

found on the vehicle identiꢀcation plate on the

B‑pillar on the driver's side.

Recommended tire pressure: the recommended

tire pressure is the tire pressure speciꢀed for the

tires mounted to the vehicle at the factory.

Kilopasccal (kPa):: 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.

Speed rating: the speed rating is part of the tire

identiꢀcation. It speciꢀes the speed range for

which a tire is approved.

The tire and information table contains the recom-

mended tire pressures for cold tires, the maxi-

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

the load index may also be imprinted on the side

GVW (Gross Vehicle Weight): the gross vehicle

mum permissible load and the maximum permissi- weight comprises the weight of the vehicle includ- wall of the tire. This speciꢀes the load-bearing

ble vehicle speed.

ing fuel, tools, the spare wheel, accessories instal- capacity of the tire more precisely.

led, occupants, luggage and the trailer drawbar

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.

Curb weight: the weight of a vehicle with standard

noseweight, if applicable. The gross vehicle weight

must not exceed the gross vehicle weight rating

GVWR as speciꢀed on the vehicle identiꢀcation

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

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

Increased vehicle weight due to optional equip-

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.

GVWR (Gross Vehicle Weight Rating): the GVWR is passengers or luggage.

the maximum permitted gross weight of the fully

Maximuum tire load: the maximum tire load is the

maximum permissible weight in kilograms or lbs

for which a tire is approved.

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 speciꢀed on the

vehicle identiꢀcation plate on the B‑pillar on the

driver's side.

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

installed.

Maximuum permissible tire pressure: maximum

permissible tire pressure for one tire.

Wheels and tires

311

Maximum lload on onne tire: maximum load on one

tire. This is calculated by dividing the maximum

axle load of one axle by two.

Side wall: the part of the tire between the tread

and the tire bead.

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

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

Weight of optional equipment: 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.

Distribution of vehicle occupants: distribution of

vehicle occupants over designated seat positions

in a vehicle.

PSI (poundds per square inch): standard unit of

measurement for tire pressure.

Aspect ratio: ratio between tire height and tire

width in percent.

Maximum permissible payload weight: nominal

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

plied by the number of seats in the vehicle.

Tire pressuure: pressure inside the tire applying an

outward force to every square inch of the tire. The

tire pressure is speciꢀed in pounds per square

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

pressure should only be corrected when the tires

are cold.

Changing a wheel

TIN (Tire Identiꢀcatioon Number): a unique identiꢀ-

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.

Notes on selecting, installing and replaacing tires

*

NOTE Mercedes-AMG vehicles

Cold tire pressure: 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).

#

Observe the notes in the Supplement.

You could otherwise fail to recognize

dangers.

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

code that contains the maximum load-bearing

capacity of a tire.

Tire contact surface: the part of the tire that

comes into contact with the road.

&

WARNING Risk of accident due to incor-

rect wheel and tire dimensions

Traction: traction is the grip resulting from friction

between the tires and the road surface.

Tire 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.

If wheels and tires of the wrong size are instal-

led, the service brakes or components in the

Wear indicator: narrow bars (tread wear bars) that

are distributed over the tire contact surface. If the

Wheels and tires

312

#

brake system and in the wheel suspension

may be damaged.

Therefore, only use tire types and sizes

approved for your vehicle model.

in the tires rubbing against the body and axle

components when loaded. This could result in

damage to the tire or the vehicle.

#

Always replace wheels and tires with

ones that fulꢀll the speciꢀcations of the

original part.

Observe the tire load rating and speed

rating required for your vehicle.

Only use tires, wheels and accessories that

have been checked and recommended by

Mercedes-Benz.

For wheels, pay attention to the following:

*

NOTE Vehicle and tire damage caused by

non-approved tire types and sizes

R

Designation

*

NOTE Risk to driving safety from retrea-

ded tires

R

For safety reasons, only use tires, wheels and

accessories which have been specially

approved by Mercedes-Benz for your vehicle.

Type

For tires, pay attention to the following:

Retreaded tires are neither tested nor recom-

mended by Mercedes-Benz, since previous

damage cannot always be detected on retrea-

ded tires.

R

Designation

These tires are specially adapted to the active

safety systems, such as ABS, ESP^®and

4MATIC, and marked as follows:

R

Manufacturer

R

Type

For this reason driving safety cannot be guar-

anteed.

R

MO = Mercedes-Benz Original

R

MOE = Mercedes-Benz Original Extended

(run-ꢃat tires only for certain wheels)

&

WARNING Risk of injury through exceed-

ing the speciꢀed tire load-bearing capa-

city or the permissible speed rating

#

Do not use used tires if you have no

information about their previous usage.

R

MO1 = Mercedes-Benz Original (only cer-

tain AMG tires)

Exceeding the speciꢀed tire load rating or the

permissible speed rating may lead to tire dam-

age and to the tires bursting.

*

NOTE Possible wheel and tire damage

when driving over obstacles

Otherwise, certain properties, such as han-

dling characteristics, vehicle noise emissions,

consumption, etc. could be adversely aꢂec-

ted. Furthermore, other tire sizes could result

Large wheels have a smaller section width. As

the section width decreases, the risk of

Wheels and tires

313

R

Legal stipulations

Factory recommendations

wheels and tires being damaged when driving

over obstacles increases.

If tire-installing tools are positioned in the area

of the valve, the electronic components could

be damaged.

#

Avoid obstacles or drive especially care-

fully.

&

WARNING Risk of accident with high per-

formance tires

#

Tire-installing tools should not be applied

in the area of the valve.

#

Reduce your speed when driving over

curbs, speed bumps, manhole covers

and potholes.

The special tire tread in combination with the

optimized tire compound means that the risk

of skidding and hydroplaning on wet roads is

increased.

#

Always have tires change at a qualiꢀed

specialist workshop.

#

Avoid particularly high curbs.

*

NOTE Damage to summer tires at low

ambient temperatures

In addition, the tire grip is greatly reduced at a

low outside temperature and tire running tem-

perature.

*

NOTE Possible wheel and tire damage

when parking on curbs or in potholes

At low ambient temperatures, tears could form

when driving with summer tires, causing per-

manent damage to the tires.

Parking on curbs or in potholes may damage

the wheels and tires.

Switch on the ESP^®and adapt your driv-

ing style accordingly.

#

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

i M+S tires.

#

If possible, park only on ꢃat surfaces.

#

Use i M+S tires at outside tempera-

tures of less than 50 °F (10 °C).

#

Avoid curbs and potholes when parking.

#

Only use the tires for their intended pur-

pose.

Accessory parts which are not approved for your

vehicle by Mercedes-Benz, or which are not used

correctly, can impair the operating safety.

*

NOTE Damage to electronic component

parts due to the use of tire-installing tools

Before purchasing and using non-approved acces-

sories, visit a qualiꢀed specialist workshop and

inquire about:

Vehicles with tire pressure monitoring sys-

tem: There are electronic component parts in

the wheel.

R

Suitability

Wheels and tires

314

R

Observe the following when selecting, installing

and replacing tires:

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

tread.

Tire and Loading Information placard

(/ page 300)

R

Furthermore, the use of certain tire types in

certain regions and areas of operation can be

highly beneꢀcial.

Observe the maximum permissible speed for

the M+S tires installed.

Tire size designation, load-bearing capacity,

speed rating and load index (/ page 307)

R

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.

Tire pressure table (/ page 295)

R

Only use tires and wheels of the same type

(summer tires, winter tires, MOExtended tires)

and the same make.

Notes on the emergency spare wheel

(/ page 321)

R

Break in new tires at moderate speeds for the

ꢀrst 60 miles (100 km).

R

Only install wheels of the same size on one

axle (leꢄ and right).

Notes on rotating the wheels

Replace the tires aꢄer six years at the latest,

regardless of wear.

It is only permissible to install a diꢂerent

wheel size in the event of a ꢃat tire in order to

drive to the specialist workshop.

&

WARNING Risk of injury through diꢂerent

wheel sizes

When replacing with tires that do not feature

run-ꢃat characteristics: vehicles with

MOExtended tires are not equipped with a

TIREFIT kit at the factory. Equip the vehicle

with a TIREFIT kit aꢄer replacing with tires that

do not feature run-ꢃat characteristics, e.g.

winter tires.

Rotating the front and rear wheels can

severely impair the driving characteristics.

R

Vehicles with a tire pressure monitoring sys-

tem: All installed wheels must be equipped

with functioning sensors for the tire pressure

monitoring system.

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.

R

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

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

for all wheels.

For more information on wheels and tires, contact

a qualiꢀed specialist workshop.

Winter tires provide the best possible grip in

wintry road conditions.

Be sure to also observe the following further rela-

ted subjects:

The wear patterns on the front and rear wheels

diꢂer:

R

Notes on tire pressure (/ page 293)

R

Front wheels wear more on the tire shoulder

Wheels and tires

315

R

%

Rear wheels wear more in the center of the

tire

Overview of the tire--change tool kit

Depending on the vehicle equipment, the tool

bag may be located at other positions in the

trunk.

*

NOTE Mercedes-AMG vehicles

Do not drive with tires that have too little tread

depth. This signiꢀcantly reduces traction on wet

roads (hydroplaning).

#

Observe the notes in the Supplement.

You could otherwise fail to recognize

dangers.

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.

Apart from some country-speciꢀc 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 qualiꢀed spe-

cialist workshop.

You require the following tools, for example, to

change a wheel:

The tool bag contains:

Observe the instructions and safety notes on

"Changing a wheel" when doing so (/ page 316).

R

Jack

R

Jack

Gloves

R

Chock

Notes on storing wheels

Lug wrench

Alignment bolt

Folding chock

Ratchet for jack

R

Lug wrench

When storing wheels, observe the following notes:

R

Alignment bolt

R

Aꢄer removing wheels, store them in a cool,

dry and preferably dark place.

The tire-change tool kit is located in tool bag 1

in the trunk.

R

Protect the tires from contact with oil, grease

or fuel.

Wheels and tires

316

#

Preparing the vehiccle for a wheel change

Requirements:

R

The vehicle is not on a slope.

Raise the vehicle (/ page 317).

Plastic hub cap

#

To remove: turn the center cover of the hub

cap counter-clockwise and remove the hub

cap.

Removing and installing thhe wheel triim/hub caps

Requirements:

R

The vehicle is prepared for a wheel change

R

The vehicle is on solid, non-slippery and level

ground.

#

To install: 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.

R

(/ page 316).

The required tire-change tool kit is available.

#

%

Wheel trim

If your vehicle is not equipped with the tire-

change tool kit, consult a qualiꢀed specialist

workshop to ꢀnd out about suitable tools.

The wheel trim covers the wheel bolts on vehicles

with steel wheels. Before unscrewing the wheel

bolts, remove the wheel trim.

Aluminuum hub cap

#

Apply the electric parking brake manually.

Move the front wheels to the straight-ahead

position.

#

Vehicles with automatic transmission: Shiꢄ to

position j.

#

Switch oꢂ 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.

#

To remove: position socket 2 from the tire-

change tool kit on hub cap 1.

Position wheel wrench 3 on socket 2.

#

To remove: using both hands, carefully reach

into two wheel trim openings and remove the

wheel trim.

#

If necessary, remove the wheel trim/hub caps

(/ page 316).

#

Wheels and tires

317

#

R

Using wheel wrench 3, turn hub cap 1

counter-clockwise and remove it.

The jack must be placed on a ꢀrm, ꢃat and

non-slip surface. If necessary, use a large, ꢃat,

load-bearing, non-slip underlay.

#

To install: follow the instructions above in

reverse order.

The foot of the jack must be positioned verti-

cally under the jack support point.

%

Speciꢀedd tightening torque: 18 lb-ꢄ (25 Nm).

Raising the vehiclee when changging a wheel

Requirements:

R

There are no persons in the vehicle.

#

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.

R

The vehicle has been prepared for a wheel

change (/ page 316).

R

The wheel trims and hub caps have been

removed (/ page 316).

Important notes on using the jack:

Rules of conduct when the vehicle is raised:

R

Use only a vehicle-speciꢀc jack that has been

approved by Mercedes-Benz to raise the vehi-

cle.

R

Never place your hands or feet under the vehi-

cle.

R

Never lie under the vehicle.

R

The jack is only designed for raising and hold-

R

Do not start the vehicle and do not release the

electric parking brake.

ing the vehicle for a short time while a wheel

is being changed and not for maintenance

work under the vehicle.

R

Do not open or close any doors or the trunk

lid.

Wheels and tires

318

the jack must be positioned vertically

under the jacking point of the vehicle.

*

NOTE 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.

Position of jack support points

#

*

NOTE Mercedes-AMG vehicles

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.

#

Observe the notes in the Supplement.

You could otherwise fail to recognize

dangers.

#

Position support 2 of jack 4 on jack sup-

port point 1.

&

WARNING Risk of injury from incorrect

positioning of the jack

%

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.

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

Wheels and tires

319

#

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.

Notes on removing an emergency spare wheel

(/ page 321).

*

NOTE Damage to threading from dirt on

wheel bolts

#

Do not place wheel bolts in sand or on a

dirty surface.

#

Turn ratchet 3 until the tire is raised a maxi-

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

Installiing a new wheel

Requirements:

R

The wheel to be changed is removed and the

Loosen and remove the wheel (/ page 319).

#

Unscrew the uppermost wheel bolt com-

pletely.

alignment bolt is screwed in (/ page 319).

Removing a wheel

Requirements:

*

NOTE Mercedes-AMG vehicles

#

Observe the notes in the Supplement.

You could otherwise fail to recognize

dangers.

R

The vehicle is raised (/ page 317).

*

NOTE Mercedes-AMG vehicles

#

Observe the notes in the Supplement.

You could otherwise fail to recognize

dangers.

&

WARNING 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.

When changing a wheel, avoid applying any force

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

comfort when braking.

#

Screw alignment bolt 1 into the thread

instead of the wheel bolt.

Unscrew the remaining wheel bolts com-

pletely.

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

ing.

Remove the wheel and, if necessary, store it in

the trunk.

#

Never oil or grease the threads.

Wheels and tires

320

#

Tighten the last wheel bolt until it is ꢀnger-

tight.

#

In the event of damage to the threads,

contact a qualiꢀed specialist workshop

immediately.

Only tighten wheel bolts or wheel nuts

when the vehicle is on the ground.

Lower the vehicle (/ page 320).

#

Observe the instructions and safety notes on

"Changing a wheel" (/ page 311).

#

Have the damaged wheel bolts or dam-

aged hub threads replaced.

Loweringg the vehiiccle aꢄer a wheel change

Requirements:

R

The new wheel has been installed

For safety reasons, only use wheel bolts which

have been approved by Mercedes-Benz and

for the wheel in question.

#

Do not continue driving.

Observe the information on the choice of tires

(/ page 319).

(/ page 311).

*

NOTE Damage to paintwork of the wheel

rim when screwing in the ꢀrst wheel bolt

#

To lower the vehicle: place the ratchet onto

the hexagon nut of the jack so that the letters

"AB" are visible and turn counter-clockwise.

For tires with a speciꢀed 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.

If the wheel has too much play when screwing

in the ꢀrst wheel bolt, the wheel rim paint can

be damaged.

#

Slide the wheel to be mounted onto the align-

ment bolt and push it on.

#

Press the wheel ꢀrmly against the wheel

hub when screwing in the ꢀrst wheel

bolt.

#

Observe the notes on installing an emergency

spare wheel (/ page 321).

#

Tighten the wheel bolts evenly in a diagonal

pattern in the order indicated until they are

ꢀnger-tight.

&

WARNING Risk of injury from tightening

wheel bolts and nuts

#

Unscrew and remove the alignment bolt.

If you tighten the wheel bolts or wheel nuts

when the vehicle is raised, the jack could tip.

Wheels and tires

321

#

%

Tighten the wheel bolts evenly in a diagonal

pattern in the order indicated 1 to 5 with

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

The following does not apply if the new wheel

is an emergency spare wheel.

#

Never install more than one emergency

spare wheel or spare wheel that diꢂers

in size.

#

Vehicles with tire pressure loss warning sys-

tem: Restart the tire pressure loss warning

system (/ page 299).

Tighten the wheel bolts evenly in a diagonal

pattern in the order indicated 1 to 5 with

the speciꢀed tightening torque of 96 lb-ꢄ

(130 Nm).

Only use an emergency spare wheel or

spare wheel brieꢃy.

Do not deactivate ESP^®.

#

Vehicles with a tire pressure monitoring sys-

tem: Restart the tire pressure monitoring sys-

tem (/ page 298).

#

Have the emergency spare wheel or

spare wheel of a diꢂerent size replaced

at the nearest qualiꢀed specialist work-

shop. The new wheel must have the cor-

rect dimensions.

&

WARNING Risk of accident due to incor-

rect tightening torque

Emergency spare wheel

The wheels could come loose if the wheel

bolts or wheel nuts are not tightened to the

prescribed torque.

Notes on the emergency spare wheel

%

The emergency spare wheel is secured in the

emergency spare wheel bag in the trunk.

&

WARNING Risk of accident caused by

incorrect wheel and tire dimensions

#

Ensure that the wheel bolts or wheel

nuts are tightened to the prescribed

tightening torque.

Observe the following notes on removing an emer-

gency spare wheel:

The wheel or tire sizes and the tire type of the

emergency spare wheel or spare wheel and

the wheel to be replaced may diꢂer. The emer-

gency spare wheel or spare wheel can signiꢀ-

cantly impair driving characteristics of the

vehicle.

#

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

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Before stowing the emergency spare wheel,

make sure there is no air leꢄ in the tire.

cle. Contact a qualiꢀed specialist work-

shop and have the tightening torque

checked immediately.

If necessary, allow the air to escape.

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To release air from the tire: remove the valve

cap of the tire.

To prevent hazardous situations:

#

Check the tire pressure of the newly installed

wheel and adjust it if necessary.

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Press down the metal insert in the valve using

a pointed object, e.g. a pen.

Drive carefully.

Wheels and tires

322

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Screw the valve cap onto the valve.

the tire pressure monitoring system cannot

function reliably. For a few minutes aꢄer 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.

Inꢃatinng the emergency spare wheel

Observe the following notes on installing an emer-

gency spare wheel:

*

NOTE Overheating due to the tire inꢃation

compressor running too long

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The maximum permissible speed with an

emergency spare wheel installed is 50 mph

(80 km/h).

#

Do not run the tire inꢃation compressor

for longer than ten minutes without inter-

ruption.

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Do not equip the emergency spare wheel with

snow chains.

Be sure to also observe the following further rela-

ted subjects:

Requirements:

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Replace the emergency spare wheel aꢄer six

years at the latest, regardless of wear.

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Comply with the manufacturer's safety notes on

the sticker of the emergency spare wheel and on

the tire inꢃation compressor.

Notes on tire pressure (/ page 293)

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Tire and Loading Information placard

(/ page 300)

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Check the tire pressure of the emergency

spare wheel installed. Correct the pressure as

necessary.

#

Remove the sticker with the label 50 mph

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Tire pressure table (/ page 295)

(80 km/h) from the tire inꢃation compressor

housing and aꢁx it to the instrument cluster

within the driver's ꢀeld of vision.

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Notes on installing tires (/ page 311)

%

The speciꢀed tire pressure is stated on the

label of the emergency spare wheel.

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Installing an emergency spare wheel

(/ page 316)

#

Remove the tire inꢃation compressor from the

storage well under the trunk ꢃoor

Vehicles with a tire pressure loss warning sys-

tem: 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.

(/ page 275).

Vehicles with a tire pressure monitoring sys-

tem: If an emergency spare wheel is installed,

Wheels and tires

323

#

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Observe the notes on sockets (/ page 107).

Unscrew union nut 2 of ꢀller hose 1 from

the valve.

#

Press the start/stop button once to switch on

the power supply (/ page 128).

Screw the valve cap of the emergency spare

wheel onto the valve again.

#

Press on and oꢂ switch 4 on the tire inꢃation

compressor to I.

The tire inꢃation compressor is switched on.

The tire is inꢃated. The tire pressure is shown

on manometer 5.

Store ꢀller hose 1 and plug 3 in the lower

section of the tire inꢃation compressor hous-

ing.

#

Store the tire inꢃation compressor in the vehi-

cle.

#

Pump the tire to the speciꢀed tire pressure.

#

Pull ꢀller hose 1 and plug 3 out of the tire

inꢃation compressor housing.

%

The speciꢀed tire pressure is stated on the

label of the emergency spare wheel.

Insert plug 7 of ꢀller hose 1 in the socket

on the tire inꢃation compressor and then turn

it until plug 7 engages.

#

When the speciꢀed tire pressure has been

reached, press on and oꢂ switch 4 on the

tire inꢃation compressor to 0.

#

Unscrew the cap from the valve on the emer-

gency spare wheel.

The tire inꢃation compressor is switched oꢂ.

#

Press the start/stop button to switch oꢂ the

power supply.

Screw union nut 2 of ꢀller hose 1 onto

valve.

If the tire pressure is higher than the speciꢀed

pressure, press pressure release valve button

6 until the correct tire pressure has been

reached.

Make sure on and oꢂ switch 4 of the tire

inꢃation compressor is set to 0.

#

Insert plug 3 in a socket in your vehicle.

12 V socket (/ page 107)

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Wheels and tires for Your Mercedes A Class 4 Door Third Generation (2018-2026)

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