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

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-ꢁat 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 ꢁat 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 (leꢃ and right).

Notes on rotating the wheels

Replace the tires aꢃer six years at the latest,

regardless of wear.

It is only permissible to install a diꢂerent

wheel size in the event of a ꢁat 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-ꢁat characteristics: vehicles with

MOExtended tires are not equipped with a

TIREFIT kit at the factory. Equip the vehicle

with a TIREFIT kit aꢃer replacing with tires that

do not feature run-ꢁat 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

Aꢃer 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: Shiꢃ 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, ꢁat and

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

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-ꢃ (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 aꢃer 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 -> Changing a wheel for Your Mercedes A Class 4 Door Third Generation (2018-2026)

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