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

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

tire. This is calculated by dividing the maximum

axle load of one axle by two.

PSI (pounds per sq

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

measurement for tire pressure.

Aspect r

Aspect ratio:atio: ratio between tire height and tire

width in percent.

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

outward force to every square inch of the tire. The

tire pressure is specied in pounds per square

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

pressure should only be corrected when the tires

are cold.

Cold tir

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

vehicle has been parked for at least 3 hours with-

out direct sunlight on the tires or the vehicle has

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

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

comes into contact with the road.

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

ensure that the tire sits securely on the wheel rim.

There are several wire cores in the tire bead to

prevent the tire from changing length on the

wheel rim.

Side w

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

and the tire bead.

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

weight of the optional equipment weighing more

than the replaced standard parts and more than

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

high-performance brakes, level control system, a

roof luggage rack or high-performance batteries,

is not included in the curb weight and the weight

of the accessories.

TIN (T

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

cation number which can be used by a tire manu-

facturer to identify tires, for example, in a product

recall, and thus identify the purchasers. The TIN is

made up of the manufacturer's identity code, tire

size, tire type code and the manufacturing date.

Load-bear

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

code that contains the maximum load-bearing

capacity of a tire.

Traction:action: traction is the grip resulting from friction

between the tires and the road surface.

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

are distributed over the tire contact surface. If the

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

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

Dis

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

vehicle occupants over designated seat positions

in a vehicle.

Maximum per

Maximum permissible paymissible payload wload weight:eight: nominal

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

plied by the number of seats in the vehicle.

Changing a wheelChanging a wheel

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

NOOTETE Mercedes-AMG vehicles

Observe the notes in the Supplement.

You could otherwise fail to recognize

dangers.

WARNINGARNING Risk of accident due to incor-

rect wheel and tire dimensions

If wheels and tires of the wrong size are instal-

led, the service brakes or components in the

Wheels and tires

313

brake system and in the wheel suspension

may be damaged.

Always replace wheels and tires with

ones that fulll the specications of the

original part.

For wheels, pay attention to the following:

Designation

Type

For tires, pay attention to the following:

Designation

Manufacturer

Type

WARNINGARNING Risk of injury through exceed-

ing the specied tire load-bearing capa-

city or the permissible speed rating

Exceeding the specied tire load rating or the

permissible speed rating may lead to tire dam-

age and to the tires bursting.

Therefore, only use tire types and sizes

approved for your vehicle model.

Observe the tire load rating and speed

rating required for your vehicle.

NOOTETE Vehicle and tire damage caused by

non-approved tire types and sizes

For safety reasons, only use tires, wheels and

accessories which have been specially

approved by Mercedes-Benz for your vehicle.

These tires are specially adapted to the active

safety systems, such as ABS, ESP

and

4MATIC, and marked as follows:

MO = Mercedes-Benz Original

MOE = Mercedes-Benz Original Extended

(run-at tires only for certain wheels)

MO1 = Mercedes-Benz Original (only cer-

tain AMG tires)

Otherwise, certain properties, such as han-

dling characteristics, vehicle noise emissions,

consumption, etc. could be adversely aec-

ted. Furthermore, other tire sizes could result

in the tires rubbing against the body and axle

components when loaded. This could result in

damage to the tire or the vehicle.

Only use tires, wheels and accessories that

have been checked and recommended by

Mercedes-Benz.

NOOTETE Risk to driving safety from retrea-

ded tires

Retreaded tires are neither tested nor recom-

mended by Mercedes-Benz, since previous

damage cannot always be detected on retrea-

ded tires.

For this reason driving safety cannot be guar-

anteed.

Do not use used tires if you have no

information about their previous usage.

NOOTETE Possible wheel and tire damage

when driving over obstacles

Large wheels have a smaller section width. As

the section width decreases, the risk of

314314

Wheels and tires

wheels and tires being damaged when driving

over obstacles increases.

Avoid obstacles or drive especially care-

fully.

Reduce your speed when driving over

curbs, speed bumps, manhole covers

and potholes.

Avoid particularly high curbs.

NOOTETE Possible wheel and tire damage

when parking on curbs or in potholes

Parking on curbs or in potholes may damage

the wheels and tires.

If possible, park only on at surfaces.

Avoid curbs and potholes when parking.

NOOTETE Damage to electronic component

parts due to the use of tire-installing tools

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

ttem:em: There are electronic component parts in

the wheel.

If tire-installing tools are positioned in the area

of the valve, the electronic components could

be damaged.

Tire-installing tools should not be applied

in the area of the valve.

Always have tires change at a qualied

specialist workshop.

NOOTETE Damage to summer tires at low

ambient temperatures

At low ambient temperatures, tears could form

when driving with summer tires, causing per-

manent damage to the tires.

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

i M+S tires.

Accessory parts which are not approved for your

vehicle by Mercedes-Benz, or which are not used

correctly, can impair the operating safety.

Before purchasing and using non-approved acces-

sories, visit a qualied specialist workshop and

inquire about:

Suitability

Legal stipulations

Factory recommendations

WARNINGARNING Risk of accident with high per-

formance tires

The special tire tread in combination with the

optimized tire compound means that the risk

of skidding and hydroplaning on wet roads is

increased.

In addition, the tire grip is greatly reduced at a

low outside temperature and tire running tem-

perature.

Switch on the ESP

and adapt your driv-

ing style accordingly.

Use i M+S tires at outside tempera-

tures of less than 50 °F (10 °C).

Only use the tires for their intended pur-

pose.

Wheels and tires

315

Observe the following when selecting, installing

and replacing tires:

Furthermore, the use of certain tire types in

certain regions and areas of operation can be

highly benecial.

Only use tires and wheels of the same type

(summer tires, winter tires, MOExtended tires)

and the same make.

Only install wheels of the same size on one

axle (le and right).

It is only permissible to install a dierent

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

drive to the specialist workshop.

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

ttem:em: All installed wheels must be equipped

with functioning sensors for the tire pressure

monitoring system.

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

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

for all wheels.

Winter tires provide the best possible grip in

wintry road conditions.

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

tread.

Observe the maximum permissible speed for

the M+S tires installed.

If the tire's maximum speed is below that of

the vehicle, this must be indicated by an

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

Break in new tires at moderate speeds for the

rst 60 miles (100 km).

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

regardless of wear.

When r

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

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

MOExtended tires are not equipped with a

TIREFIT kit at the factory. Equip the vehicle

with a TIREFIT kit aer replacing with tires that

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

winter tires.

For more information on wheels and tires, contact

a qualied specialist workshop.

Be sure to also observe the following further rela-

ted subjects:

Notes on tire pressure (/ page 295)

Tire and Loading Information placard

(/ page 302)

Tire size designation, load-bearing capacity,

speed rating and load index (/ page 309)

Tire pressure table (/ page 297)

Notes on the emergency spare wheel

(/ page 323)

NNoottes on rotes on rotating tating the wheelshe wheels

WARNINGARNING Risk of injury through dierent

wheel sizes

Rotating the front and rear wheels can

severely impair the driving characteristics.

The wheel brakes or suspension components

may also be damaged.

Rotate front and rear wheels only if the

wheels and tires are of the same dimen-

sions.

The wear patterns on the front and rear wheels

dier:

Front wheels wear more on the tire shoulder

316316

Wheels and tires

Rear wheels wear more in the center of the

tire

Do not drive with tires that have too little tread

depth. This signicantly reduces traction on wet

roads (hydroplaning).

On vehicles that have the same size front and rear

wheels, rotate the wheels according to the inter-

vals in the tire manufacturer's warranty book in

your vehicle documents. If this is not available,

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

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

Ensure that the direction of rotation is main-

tained.

Observe the instructions and safety notes on

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

NNoottes on stes on stororing wheelsing wheels

When storing wheels, observe the following notes:

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

dry and preferably dark place.

Protect the tires from contact with oil, grease

or fuel.

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

NOOTETE Mercedes-AMG vehicles

Observe the notes in the Supplement.

You could otherwise fail to recognize

dangers.

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

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

For more information on which tire-changing tools

are required and approved for performing a wheel

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

cialist workshop.

You require the following tools, for example, to

change a wheel:

Jack

Chock

Lug wrench

Alignment bolt

The tire-change tool kit is located in tool bag

in the trunk.

Depending on the vehicle equipment, the tool

bag may be located at other positions in the

trunk.

The tool bag contains:

Jack

Gloves

Lug wrench

Alignment bolt

Folding chock

Ratchet for jack

Wheels and tires

317

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

RReqequiruirements:ements:

The vehicle is not on a slope.

The vehicle is on solid, non-slippery and level

ground.

The required tire-change tool kit is available.

If your vehicle is not equipped with the tire-

change tool kit, consult a qualied specialist

workshop to nd out about suitable tools.

Apply the electric parking brake manually.

Move the front wheels to the straight-ahead

position.

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

position j.

Switch o the vehicle.

Make sure that the vehicle cannot be started.

Place chocks or other suitable items under the

front and rear of the wheel that is diagonally

opposite the wheel you wish to change.

If necessary, remove the wheel trim/hub caps

(/ page 318).

Raise the vehicle (/ page 319).

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

RReqequiruirements:ements:

The vehicle is prepared for a wheel change

(/ page 318).

Wheel tr

Wheel trimim

The wheel trim covers the wheel bolts on vehicles

with steel wheels. Before unscrewing the wheel

bolts, remove the wheel trim.

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

into two wheel trim openings and remove the

wheel trim.

Plas

Plastic hub captic hub cap

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

cap counter-clockwise and remove the hub

cap.

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

the hub cap is turned counter-clockwise.

Position the hub cap and turn the center cover

clockwise until the hub cap engages physically

and audibly.

Aluminum hub cap

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

change tool kit on hub cap

Position wheel wrench 3 on socket 2.

318318

Wheels and tires

Using wheel wrench 3, turn hub cap 1

counter-clockwise and remove it.

TTo insto install:all: follow the instructions above in

reverse order.

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

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

RReqequiruirements:ements:

There are no persons in the vehicle.

The vehicle has been prepared for a wheel

change (/ page 318).

Important notes on using the jack:

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

approved by Mercedes-Benz to raise the vehi-

cle.

The jack is only designed for raising and hold-

ing the vehicle for a short time while a wheel

is being changed and not for maintenance

work under the vehicle.

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

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

load-bearing, non-slip underlay.

The foot of the jack must be positioned verti-

cally under the jack support point.

Rules of conduct when the vehicle is raised:

Never place your hands or feet under the vehi-

cle.

Never lie under the vehicle.

Do not start the vehicle and do not release the

electric parking brake.

Do not open or close any doors or the trunk

lid.

Using the lug wrench, loosen the wheel bolts

on the wheel you wish to change by about one

full turn. Do not unscrew the screws com-

pletely.

Wheels and tires

319

Position of jack support points

NOOTETE Mercedes-AMG vehicles

Observe the notes in the Supplement.

You could otherwise fail to recognize

dangers.

WARNINGARNING Risk of injury from incorrect

positioning of the jack

If you do not position the jack correctly at the

appropriate jacking point of the vehicle, the

jack could tip with the vehicle raised.

Only position the jack at the appropriate

jacking point of the vehicle. The base of

the jack must be positioned vertically

under the jacking point of the vehicle.

NOOTETE Vehicle damage from the jack

If you do not position the jack correctly at the

appropriate jack support point of the vehicle,

the jack could tip over with the vehicle raised.

The jack is designed exclusively for jack-

ing up the vehicle at the jack support

points.

Take the ratchet out of the tire-change tool kit

and place it on the hexagon nut of the jack so

that the letters "AUF" are visible.

Position support 2 of jack 4 on jack sup-

port point

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

may be possible that the jack cannot be posi-

tioned at jack support point

1. In this case,

unload the vehicle.

320320

Wheels and tires

Turn ratchet 3 clockwise until support 2

sits completely on jack support point 1 and

the base of the jack lies evenly on the ground.

Turn ratchet 3 until the tire is raised a maxi-

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

Loosen and remove the wheel (/ page 321).

RRemoemoving a wheelving a wheel

RReqequiruirements:ements:

The vehicle is raised (/ page 319).

NOTETE Mercedes-AMG vehicles

Observe the notes in the Supplement.

You could otherwise fail to recognize

dangers.

When changing a wheel, avoid applying any force

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

comfort when braking.

NOOTETE Damage to threading from dirt on

wheel bolts

Do not place wheel bolts in sand or on a

dirty surface.

Unscrew the uppermost wheel bolt com-

pletely.

Screw alignment bolt 1 into the thread

instead of the wheel bolt.

Unscrew the remaining wheel bolts com-

pletely.

Remove the wheel.

InstInstalling a nealling a new wheelw wheel

RReqequiruirements:ements:

The wheel to be changed is removed and the

alignment bolt is screwed in (/ page 321).

NOTETE Mercedes-AMG vehicles

Observe the notes in the Supplement.

You could otherwise fail to recognize

dangers.

WARNINGARNING Risk of accident from losing a

wheel

Oiled, greased or damaged wheel bolt/wheel

nut threads or wheel hub/wheel mounting

bolt threads can cause the wheel bolts/wheel

nuts to come loose.

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

ing.

Never oil or grease the threads.

In the event of damage to the threads,

contact a qualied specialist workshop

immediately.

Wheels and tires

321

Have the damaged wheel bolts or dam-

aged hub threads replaced.

Do not continue driving.

Observe the information on the choice of tires

(/ page 313).

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

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

rect direction of rotation. Observe the direction of

rotation when installing.

Slide the wheel to be mounted onto the align-

ment bolt and push it on.

WARNINGARNING Risk of injury from tightening

wheel bolts and nuts

If you tighten the wheel bolts or wheel nuts

when the vehicle is raised, the jack could tip.

Only tighten wheel bolts or wheel nuts

when the vehicle is on the ground.

Be sure to observe the instructions and safety

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

For safety reasons, only use wheel bolts which

have been approved by Mercedes-Benz and

for the wheel in question.

NOOTETE Damage to paintwork of the wheel

rim when screwing in the rst wheel bolt

If the wheel has too much play when screwing

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

be damaged.

Press the wheel rmly against the wheel

hub when screwing in the rst wheel

bolt.

Tighten the wheel bolts evenly in a diagonal

pattern in the order indicated until they are

nger-tight.

Unscrew and remove the alignment bolt.

Tighten the last wheel bolt until it is nger-

tight.

Lower the vehicle (/ page 322).

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

RReqequiruirements:ements:

The new wheel has been installed

(/ page 321).

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

the hexagon nut of the jack so that the letters

"AB" are visible and turn counter-clockwise.

Tighten the wheel bolts evenly in a diagonal

pattern in the order indicated

1 to 5 with

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

Tighten the wheel bolts evenly in a diagonal

pattern in the order indicated 1 to 5 with

322322

Wheels and tires

the specied tightening torque of 96 lb-

(130 Nm).

WARNINGARNING Risk of accident due to incor-

rect tightening torque

The wheels could come loose if the wheel

bolts or wheel nuts are not tightened to the

prescribed torque.

Ensure that the wheel bolts or wheel

nuts are tightened to the prescribed

tightening torque.

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

cle. Contact a qualied specialist work-

shop and have the tightening torque

checked immediately.

Check the tire pressure of the newly installed

wheel and adjust it if necessary.

The following does not apply if the new wheel

is an emergency spare wheel.

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

ttem:em: Restart the tire pressure loss warning

system (/ page 301).

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

ttem:em: Restart the tire pressure monitoring sys-

tem (/ page 300).

EmergEmergency sparency spare wheele wheel

NNoottes on tes on the emerghe emergency sparency spare wheele wheel

WARNINGARNING Risk of accident caused by

incorrect wheel and tire dimensions

The wheel or tire sizes and the tire type of the

emergency spare wheel or spare wheel and

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

gency spare wheel or spare wheel can signi-

cantly impair driving characteristics of the

vehicle.

To prevent hazardous situations:

Drive carefully.

Never install more than one emergency

spare wheel or spare wheel that diers

in size.

Only use an emergency spare wheel or

spare wheel briey.

Do not deactivate ESP

Have the emergency spare wheel or

spare wheel of a dierent size replaced

at the nearest qualied specialist work-

shop. The new wheel must have the cor-

rect dimensions.

The emergency spare wheel is secured in the

emergency spare wheel bag in the trunk.

Observe the following notes on installing an emer-

gency spare wheel:

The maximum permissible speed with an

emergency spare wheel installed is 50 mph

(80 km/h).

Do not equip the emergency spare wheel with

snow chains.

Replace the emergency spare wheel aer six

years at the latest, regardless of wear.

Check the tire pressure of the emergency

spare wheel installed. Correct the pressure as

necessary.

The specied tire pressure is stated on the

label of the emergency spare wheel.

Wheels and tires

323

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

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