Get Wheels and tires Guide for Mercedes G Class SUV Fourth Generation (2019-2024)

Notes on noise or unusual handling characteris-

tics

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 defective, reduce your

speed immediately and have the tires and wheels

checked at a qualied specialist workshop.

Notes on regularly inspecting wheels and tires

WARNING 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.

WARNING 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 348).

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.

Wheels and tires

347

Notes on snow chains

NOTE Damage to components of the vehi-

cle body or chassis due to mounted snow

chains

If you mount snow chains to the front wheels

of 4MATIC vehicles, you may damage compo-

nents of the vehicle body or chassis.

Only mount snow chains to the rear

wheels of 4MATIC vehicles.

Mercedes-AMG vehicles: the notes on using snow

chain-compatible AMG winter tires apply to AMG

tires. Snow chains are permitted for use only with

these.

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 with Active Parking Assist: do not use

Active Parking Assist when snow chains are

installed.

You can deactivate ESP

to pull away

(/ page 164). This allows the wheels to spin,

achieving an increased driving force.

Tire pressure

Notes on tire pressure

WARNING 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:

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.

348

Wheels and tires

WARNING 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 defects as a result of overheating

Impaired handling characteristics

Irregular wear

Increased fuel consumption

WARNING 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

WARNING 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 the recommended

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 353).

Tire pressure table on the inside of the fuel

ller ap (/ page 350).

Observe the maximum tire pressure

(/ page 360).

Use a suitable pressure gauge to check the tire

pressure. The outer appearance of a tire does not

permit any reliable conclusion about the tire pres-

sure.

Vehicles with a tire pressure monitoring system:

you can also check the tire pressure using the on-

board computer.

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).

Wheels and tires

349

A rise in the tire temperature of 18°F (10°C)

increases the tire pressure by approx. 10 kPa

(0.1 bar/1.5 psi). Take this into account when

checking the tire pressure of warm tires.

The tire pressure recommended for increased

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

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

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.

Notes on trailer operation

Always inate the rear axle tires to the recommen-

ded tire pressure on the tire pressure table for

increased load.

Notes on driving on sand

When driving on sand, you can lower the tire pres-

sure (/ page 132).

Tire pressure table

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 tire pressure information following is only valid

for those tire sizes.

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.

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. You can

nd it on the tire side wall (/ page 361).

Be sure to also observe the following further rela-

ted subjects:

Notes on tire pressure (/ page 348)

Tire and loading information placard

(/ page 353)

Maximum tire pressure (/ page 360)

350

Wheels and tires

Checking the tire pressure 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 348)

Tire pressure table (/ page 350)

Tire and loading information placard

(/ page 353)

Tire pressure monitoring system

▌Function of the tire pressure monitoring system

DANGER 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

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cantly under-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.

Wheels and tires

351

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 tted to the vehicle by

means of a tire pressure sensor.

The tire pressure and the tire temperature appear

on the on-board computer (/ page 352).

If there is a substantial pressure loss or if the tire

temperature is excessive, you will be warned with

display messages (/ page 434) or the h

warning lamp on the instrument display

(/ page 453).

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 353).

System 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

Aer a maximum of ten minutes of fording,

the Tire Press. Monitor Currently Unavailable

message appears on the instrument display.

The tire pressure monitoring system is then

temporarily unavailable due to the fording.

This message will disappear again approx-

imately one minute aer the fording.

▌Checking the tire pressure with the tire pres-

sure monitoring system

Requirements

The vehicle is switched on.

On-board computer:

Service

Tires

One of the following displays will appear:

Current tire pressure and tire temperature on

the individual wheels:

Tire pressure will be displayed after driving a

few minutes

352

Wheels and tires

Tire Pressure Monitor Active: the teach-in

process of the system is not yet complete. The

tire pressures are already being monitored.

The teach-in process will take longer if you

have engaged the dierential locks. Check the

tire pressure again later.

Compare the tire pressure with the recom-

mended tire pressure for the current operating

condition (/ page 350). Additionally, observe

the notes on cold tires (/ page 348).

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 will be higher than those

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

do not reduce the tire pressure.

▌Restarting the tire pressure monitoring system

Requirements

The recommended tire pressure is correctly

set for the respective operating status on all of

the wheels (/ page 348).

Restart the tire pressure monitoring system in the

following situations:

The tire pressure has changed.

The wheels or tires have been changed or

newly tted.

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 will be shown on the

instrument display.

To restart, press Touch Control on the le-

hand side of the steering wheel.

The Tire Press. Monitor Restarted message

will be shown on the instrument display.

Current warning messages will be deleted and

the yellow h warning lamp will go out.

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

the system will check whether the current tire

pressures are within the specied range. The

current tire pressures will then be accepted as

reference values and monitored.

Be sure also to pay attention to the following rela-

ted topic:

Notes on tire pressure (/ page 348)

Loading the vehicle

Notes on Tire and Loading Information 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.

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.

Wheels and tires

353

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.

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 378).

Information on tire pressure in the tire pres-

sure table (/ page 350).

Further related subjects:

Determining the maximum permissible load

(/ page 354)

Notes on tire pressure (/ page 348).

Steps for Determining Correct 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

354

Wheels and tires

the "National Trac and Motor Vehicle Safety Act

of 1966".

(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): Determine the combined weight of the

driver and passengers that will be riding in

your vehicle.

(3): Subtract the combined weight of the

driver and passengers from XXX kg or XXX lbs.

(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): 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): 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.

Further related subjects:

Calculation example for determining the maxi-

mum load (/ page 355)

Tire and Loading Information placard

(/ page 353)

Tire pressure table (/ page 350)

Vehicle identication plate (/ page 378)

Calculation example for determining the maximum

load

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 for

illustration purposes only. Make sure you are

using the actual load limit for your vehicle stated

on your vehicle's Tire and Loading Information

placard (/ page 353).

The higher the weight of all the occupants, the

smaller the maximum load for luggage.

Wheels and tires

355

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) 1500 lbs (680 kg)

Step 2

Example 1 Example 2

Number of people in the vehicle (driver and occu-

pants)

5 1

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)

356

Wheels and tires

Step 3

Example 1 Example 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

357

Tire labeling

Overview of tire labeling

Uniform Tire Quality Grading Standards

DOT (Department of Transportation), (TIN)

Tire Identication Number

Maximum tire load (/ page 360)

Maximum tire pressure (/ page 360)

Manufacturer

Characteristics of the tire (/ page 361)

Tire size designation, load-bearing capacity,

speed rating and load index (/ page 361)

Tire name

The data shown in the illustration is example

data.

Tire Quality Grading

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.

Tread wear grade

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

358

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.

Traction grade

DANGER 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.

NOTE 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.

Temperature grade

WARNING 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.

DOT, Tire Identication 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

359

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 (Department of Transportation): tire sym-

bol marks 1 indicating that the tire complies

with the requirements of the US Department

of Transportation.

Manufacturer identication 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 365).

Tire size: identier 3 describes the tire size.

Tire type code: tire type code 4 can be used

by the manufacturer as a code to describe

specic characteristics of the tire.

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).

Information on the maximum tire load

The data shown in the illustration is example

data.

Maximum tire load

1 is the maximum permissi-

ble weight for which the tire is approved.

Do not overload the tires by exceeding the speci-

ed load limit. The maximum permissible load can

be found on the vehicle's tire and loading informa-

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

(/ page 353).

Specications for maximum tire pressure

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 350).

360

Wheels and tires

Information on tire characteristics

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

Tire size designation, load-bearing capacity, speed

rating and load index

WARNING 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

361

First letter(s) 1:

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 ratio 3:

Ratio between tire height and tire width in percent

(tire height divided by tire width).

Tire code 4 (tire type):

"R": radial tire

"D": bias ply tire

"B": bias radial tires

"ZR": radial tire with a maximum speed above

149 mph (240 km/h) (optional)

Rim diameter 5:

The diameter of the bead seat (not the diameter

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

inches (in).

Load-bearing index 6:

Numerical code that species the maximum load-

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

to 1,356 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 353)

Maximum tire load (/ page 360)

Load index

Speed rating 7:

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

Service Center.

Summer tires

Index Speed rating

Q up to 100 mph (160 km/h)

R up to 106 mph (170 km/h)

S up to 112 mph (180 km/h)

T up to 118 mph (190 km/h)

H up to 130 mph (210 km/h)

V up to 149 mph (240 km/h)

W up to 168 mph (270 km/h)

Y up to 186 mph (300 km/h)

362

Wheels and tires

Index Speed rating

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-weather tires and winter tires

Index Speed rating

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 index 8:

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nition of terms for tires and loading

Tire structure and characteristics: describes the

number of layers or the number of rubber-coated

belts in the tire contact surface and the tire wall.

These are made of steel, nylon, polyester and

other materials.

Bar: metric unit for tire pressure. 14.5038 pounds

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

the equivalent of one bar.

DOT (Department of Transportation): DOT-marked

tires fulll the requirements of the

U.S. Department of Transportation.

Average weight of the vehicle occupants: the

number of vehicle occupants for which the vehicle

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

Uniform Tire Quality Grading Standards: 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

363

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 printed on the side wall of the tire.

Recommended tire pressure: the recommended

tire pressure is the tire pressure specied for the

tires mounted on the vehicle at the factory.

The tire and information placard contains the rec-

ommended tire pressure for cold tires, the maxi-

mum permissible load and the maximum permissi-

ble vehicle speed.

The tire pressure table contains the recommen-

ded tire pressure for cold tires under various oper-

ating conditions, i.e. loading and/or speed of the

vehicle.

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.

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

installed.

GAWR (Gross Axle Weight Rating): the GAWR is

the maximum gross axle weight rating. 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 rating: the speed rating is part of the tire

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

which a tire is approved.

GVW (Gross Vehicle Weight): the gross vehicle

weight comprises the weight of the vehicle includ-

ing fuel, tools, the spare wheel, any accessories

installed, occupants, luggage and the trailer nose-

weight, 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 (Gross Vehicle Weight Rating): 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 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.

Kilopascal (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.

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

the load index may also be printed on the side

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

capacity of the tire more precisely.

Curb weight: 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 tire load: the maximum tire load is the

maximum permissible weight in kilograms or lbs

for which a tire is approved.

Maximum permissible tire pressure: maximum

permissible tire pressure for one tire.

364

Wheels and tires

Maximum load on one tire: maximum load on one

tire. This is calculated by dividing the maximum

axle load of one axle by two.

PSI (pounds per square inch): standard unit of

measurement for tire pressure.

Aspect ratio: ratio between tire height and tire

width in percent.

Tire pressure: the pressure inside the tire which

applies 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 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).

Tire contact surface: the part of the tire that

comes into contact with the road.

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.

Side wall: the part of the tire between the tread

and the tire bead.

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.

TIN (Tire Identication 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-bearing index: the load-bearing index is a

code that contains the maximum load-bearing

capacity of a tire.

Traction: traction is the grip resulting from friction

between the tires and the road surface.

Wear indicator: 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.

Distribution of vehicle occupants: distribution of

vehicle occupants over designated seat positions

in a vehicle.

Maximum permissible payload weight: nominal

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

plied by the number of seats in the vehicle.

Changing a wheel

Notes on selecting, installing and replacing tires

Mercedes-AMG vehicles: observe the notes in the

Supplement. You could otherwise fail to recognize

dangers.

You can ask for information regarding permitted

wheel/tire combination at an authorized

Mercedes-Benz Service Center.

WARNING 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

365

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

WARNING 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.

NOTE 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.

NOTE 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.

NOTE Possible wheel and tire damage

when driving over obstacles

Large wheels have a smaller section width. As

the section width decreases, the risk of

366

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.

NOTE Damage to electronic component

parts due to the use of tire-installing tools

Vehicles with tire pressure monitoring sys-

tem: 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.

NOTE 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 the following:

Suitability

Legal stipulations

Factory recommendations

WARNING 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.

Observe the following when selecting, installing

and replacing tires:

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.

Wheels and tires

367

Only install tires of the correct size onto the

wheels.

Vehicles with a tire pressure monitoring sys-

tem: all installed wheels must be equipped

with functioning sensors for the tire pressure

monitoring system.

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

tires or all-season tires marked M+S for all

wheels.

Winter tires bearing the i snowake sym-

bol in addition to the M+S marking 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 this is below the vehicle's maximum speed,

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.

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 348)

Tire and loading information placard

(/ page 353)

Tire size designation, load-bearing capacity,

speed rating and load index (/ page 361)

Tire pressure table (/ page 350)

Notes on the emergency spare wheel

(/ page 375)

Notes on rotating wheels

WARNING 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.

Observe the instructions and safety notes on

"Changing a wheel" (/ page 365)

The wear patterns on the front and rear wheels

dier:

Front wheels wear more on the tire shoulder

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.

368

Wheels and tires

Notes on storing 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.

Vehicle tool kit overview

The vehicle tool kit contains:

Vehicle tool bag with:

Pump lever for jack

Wheel wrench with T-piece

Screwdriver (inserted in a pump lever)

Dismantling tool for roof luggage rack

(inserted in a pump lever)

Jack with adapter

The vehicle tool kit is located under the rear

bench seat (/ page 95).

Vehicle tool bag

Jack

Preparing the vehicle for a wheel change

Requirements:

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.

The vehicle is not on a slope.

The vehicle is on solid, non-slippery and level

ground.

Apply the electric parking brake manually.

Move the front wheels to the straight-ahead

position.

Shi the transmission 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.

Remove the hub caps if necessary

(/ page 370).

Raise the vehicle (/ page 370).

Wheels and tires

369

Removing and installing the wheel trim/hub caps

Requirements

The vehicle is prepared for a wheel change

(/ page 369).

Plastic hub cap

To remove:

Turn the center cover of the hub cap counter-

clockwise and remove the hub cap.

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.

Aluminum hub cap

To remove:

Position socket 2 from the tire-change tool

kit on hub cap

Position wheel wrench 3 on socket 2.

Using wheel wrench 3, turn hub cap 1

counter-clockwise and remove it.

To install:

Follow the instructions above in reverse order.

Specied tightening torque: 20 lb- (27 Nm).

Raising the vehicle when changing a wheel

Requirements

There are no persons in the vehicle.

The vehicle has been prepared for a wheel

change (/ page 369).

The hub caps have been removed

(/ page 370).

Installing the jack

370

Wheels and tires

Assemble pump lever 1.

Place pump lever 1 with the recess on lower-

ing screw

2 on the jack.

Turn pump lever 1 clockwise as far as it will

go.

Lowering screw

2 is closed.

Adapter

To raise the vehicle at the front: adapter 3 must

be secured on the jack.

To raise the vehicle at the rear: remove adapter

3 from the jack.

Important notes on using the jack:

Use only the vehicle-specic jack that has

been tested and approved by Mercedes-Benz

to raise the vehicle.

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.

Position the jack only at 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 rear-

end door.

Using the wheel bolt, loosen the wheel bolts

on the wheel you wish to change by about one

full turn. Do not unscrew the screws com-

pletely.

WARNING 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.

Wheels and tires

371

NOTE Damage to the vehicle due to the

jack

If you do not position the jack at the jack sup-

port points provided for this purpose, you

could damage your vehicle.

Only position the jack at the jack sup-

port points provided for this purpose.

Raising the vehicle at the front

Make sure that the adapter is secured on the

jack.

Position jack 4 on the comfort bushing on

transverse link

Raise the vehicle by pumping until the tire is

no more than 1.2 in (3 cm) o the ground.

Loosen and remove the wheel (/ page 373).

Raising the vehicle at the rear

Pull out the adapter from the jack.

Position jack 4 at the jack support point of

axle carrier tube

Keep pumping until axle carrier tube 6 sits

securely in the jack support point and the

base of the jack lies evenly on the ground.

372

Wheels and tires

Raise the vehicle by pumping until the tire is

no more than 1.2 in (3 cm) o the ground.

Loosen and remove the wheel (/ page 373).

Removing a wheel

Requirements

The vehicle is raised (/ page 370).

When changing a wheel, avoid applying any force

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

comfort when braking.

NOTE Damage to threading from dirt on

wheel bolts

Do not place wheel bolts in sand or on a

dirty surface.

Unscrew the wheel bolts.

Remove the wheel.

Install the new wheel (/ page 373).

Installing a new wheel

Requirements

The wheel is removed (/ page 373).

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.

Never oil or grease the threads.

In the event of damage to the threads,

contact a qualied specialist workshop

immediately.

Have the damaged wheel bolts or dam-

aged hub threads replaced.

Do not continue driving.

Observe the information on the choice of tires

(/ page 365).

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.

Place the wheel to be installed on the wheel

hub and push it on.

WARNING 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.

For safety reasons, only use wheel bolts which

have been approved by Mercedes-Benz and

for the wheel in question.

NOTE 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.

Wheels and tires

373

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.

Lower the vehicle (/ page 374).

Lowering the vehicle aer a wheel change

Requirements

The new wheel has been installed

(/ page 373).

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.

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

the specied tightening torque of 111 lb-

(150 Nm).

WARNING 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.

Vehicles with a tire pressure monitoring sys-

tem: restart the tire pressure monitoring sys-

tem (/ page 353).

374

Wheels and tires

Emergency spare wheel

Notes on the emergency spare wheel

WARNING 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.

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 install the emergency spare wheel with

snow chains.

Replace the emergency spare wheel aer six

years at the latest, regardless of wear.

Use the wheel bolts that are included with the

emergency spare wheel.

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.

Be sure to also observe the following further rela-

ted subjects:

Notes on tire pressure (/ page 348)

Tire and loading information placard

(/ page 353)

Tire pressure table (/ page 350)

Notes on installing tires (/ page 365)

Installing an emergency spare wheel

(/ page 369)

Wheels and tires

375

Wheels and tires for Your Mercedes G Class SUV Fourth Generation (2019-2024)

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