Get Wheels and tyres Guide for Mercedes C Class 4 Door 2023

Wheels and tyres

653

R

Visually inspect wheels and tyres for damage.

Check the valve caps.

Visual check of the tyre tread depth and the

tyre contact surface across the entire width.

The minimum tread depth for summer tyres is

3 mm and for winter tyres 4 mm.

Notes on noise or unusual handling characteris-

tics

&

WARNING Risk of aquaplaning due to

insuﬃcient tyre tread

Make sure there are no vibrations, noises or

unusual handling characteristics when the vehicle

is in motion. This may indicate that the wheels or

tyres are damaged. Hidden tyre damage could

also be causing the unusual handling characteris-

tics.

If you suspect that a tyre is defective, reduce your

speed immediately and have the tyres and wheels

checked at a qualiﬁed specialist workshop.

Insuﬃcient tyre tread will result in reduced

tyre grip.

The risk of aquaplaning is increased on wet

roads, especially when the speed of the vehi-

cle is not adapted to suit the conditions.

#

Thus, you should regularly check the

Notes on snow chains

tread depth and the condition of the

tread across the entire width of all tyres.

&

WARNING Risk of accident due to incor-

rectly ﬁtted snow chains

Minimum tread depth for:

If you have ﬁtted snow chains to the front

wheels, they may drag against the vehicle

body or chassis components.

R

Summer tyres: 3 mm

M+S tyres: 4 mm

Notes on regularly inspecting wheels and tyres

R

&

WARNING Risk of injury due to damaged

tyres

#

For safety reasons, replace the tyres

before the legally-prescribed limit for the

minimum tread depth is reached.

#

Never ﬁt snow chains to the front

wheels.

Damaged tyres can cause tyre pressure loss.

#

Only ﬁt snow chains on the rear wheels

in pairs.

#

Check the tyres regularly for signs of

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 oﬀ-

road:

damage and replace any damaged tyres

immediately.

R

Check the tyre pressure (/ page 654).

F206 0105 02

Wheels and tyres

654

R

Vehicles with Active Parking Assist: do not use

Active Parking Assist when snow chains are

ﬁtted.

Vehicles with level control: if snow chains are

ﬁtted, only drive at raised vehicle level .

R

The tyres can wear excessively and/or

unevenly.

The driving characteristics as well as the

steering and braking characteristics may

be greatly impaired.

*

NOTE Damage to components of the vehi-

cle body or chassis due to ﬁtted snow

chains

R

If you ﬁt snow chains to the front wheels of

4MATIC vehicles, you may damage compo-

nents of the vehicle body or chassis.

%

You can permanently limit the maximum

speed for driving with winter tyres

(/ page 349).

You can deactivate ESP^®to pull away

(/ page 340). This allows the wheels to spin,

achieving an increased driving force.

#

Comply with the recommended tyre

pressure and check the tyre pressure of

all tyres, including the spare wheel, regu-

larly:

#

Only ﬁt snow chains to the rear wheels

of 4MATIC vehicles.

%

Observe the following notes when using snow

chains:

R

monthly

when the load changes

before embarking on a longer journey

if operating conditions change, e.g. oﬀ-

road driving

R

Snow chains are only permissible for certain

wheel/tyre combinations. You can obtain

information about this from a Mercedes-Benz

Service Centre.

Tyre pressure

Notes on tyre pressure

R

For safety reasons, only use snow chains that

#

Adjust the tyre pressure, if necessary.

&

WARNING Risk of accident due to insuﬃ-

cient or excessive tyre pressure

have been speciﬁcally approved for your vehi-

cle by Mercedes-Benz, or snow chains with

the same quality standard.

Tyre pressure which is too high or too low can:

Underinﬂated or overinﬂated tyres pose in par-

ticular the following risks:

R

Shorten the service life of the tyres.

R

Comply with the installation instructions of the

snow chain manufacturer.

If snow chains are ﬁtted, the maximum per-

missible speed is 50 km/h.

R

Cause increased tyre damage.

R

The tyres can burst.

R

Adversely aﬀect driving characteristics and

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

R

F206 0105 02

Wheels and tyres

655

R

The vehicle has travelled less than 1.6 km.

&

WARNING Risk of accident due to repea-

ted pressure drop in the tyres

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

temperature of the tyres increases, so too does

the tyre pressure.

Vehicles with a tyre pressure monitoring system:

you can also see the tyre pressure in the driver's

display (/ page 656).

The wheels, valves or tyres could be damaged.

Too low a tyre pressure can lead to the tyres

bursting.

#

Examine the tyres for foreign objects.

Check whether the tyre has a puncture

or the valve has a leak.

If you are unable to rectify the damage,

contact a qualiﬁed specialist workshop.

#

Notes on trailer operation

Always inﬂate the rear axle tyres to the recom-

mended tyre pressures on the tyre pressure table

for increased load.

#

Information on the recommended tyre pressure

for the vehicle's factory-ﬁtted tyres can be found

on the tyre pressure table on the inside of the fuel

ﬁller ﬂap (/ page 655).

Tyre pressure table

The tyre pressure table is on the inside of the fuel

ﬁller ﬂap.

The tyre pressure table shows the recommended

tyre pressure for all tyres approved for this vehi-

cle. The recommended tyre pressures apply for

cold tyres under various operating conditions, i.e.

loading and/or speed of the vehicle.

Use a suitable pressure gauge to check the tyre

pressure. The outer appearance of a tyre does not

permit any reliable conclusion about the tyre pres-

sure.

If one or more tyre sizes precede a tyre pressure,

the following tyre pressure information is only

valid for those tyre sizes and their respective load

condition.

Only correct tyre pressures when the tyres are

cold. Conditions for cold tyres:

R

The vehicle has been parked with the tyres out

of direct sunlight for at least three hours.

F206 0105 02

Wheels and tyres

656

If the preceding tyre sizes are complemented by

the + symbol, the tyre pressure information

following shows alternative tyre pressures. Fuel

consumption may then increase slightly.

The tyre pressure monitoring system is only an

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

pressure to the recommended cold tyre pressure

suitable for the operating situation.

Driver's display:

4

5

©

Service

#

Press a to conﬁrm.

One of the following displays appears:

In most cases, the tyre pressure monitoring sys-

tem will automatically update the new reference

values aꢀer you have changed the tyre pressure.

You can, however, also update the reference val-

ues by restarting the tyre pressure monitoring

system manually (/ page 657).

The load conditions "partially laden" and "fully

laden" are deﬁned in the table for diﬀerent num-

bers of passengers and amounts of luggage. The

actual number of seats may diﬀer from this.

R

Current tyre pressure of each wheel:

Tyre pressure monitoring system

System limits

The system may be impaired or may not function

particularly in the following situations:

▌Function of the tyre pressure monitoring sys-

tem

The system checks the tyre pressure and the tyre

temperature of the tyres ﬁtted to the vehicle by

means of a tyre pressure sensor.

The tyre pressure and the tyre temperature

appear in the driver's display.

R

incorrect reference values were taught in

R

sudden pressure loss caused by a foreign

object penetrating the tyre, for example

there is a malfunction caused by another radio

signal source

R

Tyre pressures will be displayed after a few

minutes of driving: current values are not yet

known to the system. The pressure/tempera-

ture values of each tyre are displayed as soon

as they are known to the system.

If there is a substantial pressure loss or if the tyre

temperature is excessive, you will be warned with

display messages (/ page 893) or the h

warning lamp in the driver's display

▌Checking the tyre pressure with the tyre pres-

sure monitoring system

R

Tyre pressure monitor active: the teach-in

(/ page 924).

Requirements

process of the system is not yet complete. The

tyre pressures are already being monitored.

R

The vehicle is switched on.

F206 0105 02

Wheels and tyres

657

#

Compare the current tyre pressure with the

recommended tyre pressure for the current

operating condition (/ page 655). Addition-

ally, observe the notes on cold tyres

(/ page 654).

Driver's display:

Wheel change

Notes on selecting, ﬁtting and replacing tyres

4

5

©

Service

#

Select Tyre pressure and conﬁrm with a.

Swipe downwards on Touch Control on the

steering wheel.

&

WARNING Risk of accident due to incor-

rect wheel and tyre dimensions

%

The values displayed in the driver's display

may deviate from those of the tyre pressure

gauge as they refer to sea level. At high eleva-

tions, the tyre pressure values indicated by a

tyre pressure gauge are higher than those

shown in the driver's display.

The Use current tyre pressures as new refer-

ence values? message is shown in the driver's

display.

If wheels and tyres of the wrong size are ﬁtted,

the service brakes or components in the brake

system and in the wheel suspension may be

damaged.

#

Select Yes and conﬁrm the restart with a.

The Tyre pressure monitor restarted message

is shown in the driver's display.

#

Always replace wheels and tyres with

those that fulﬁl the speciﬁcations of the

▌Restarting the tyre pressure monitoring system

Current warning messages are deleted and

the yellow h warning lamp goes out.

original part.

Requirements

R

For wheels, pay attention to the following:

The recommended tyre pressure is correctly

Aꢀer you have been driving for a few minutes,

the system checks whether the current tyre

pressures are within the speciﬁed range. The

current tyre pressures are then accepted as

reference values and monitored.

If the tyre pressure levels are not within the

speciﬁed range, the Please correct tyre pres-

sure message appears.

R

Designation

set for the respective operating status on each

R

Type

of the four wheels (/ page 654).

For tyres, pay attention to the following:

Restart the tyre pressure monitoring system in the

following situations:

R

Designation

R

Manufacturer

The tyre pressure has changed.

The wheels or tyres have been changed or

newly ﬁtted.

R

Type

F206 0105 02

Wheels and tyres

658

#

R

&

MOE = Mercedes-Benz Original Extended

Do not use used tyres if you have no

information about their previous usage.

WARNING Risk of injury through exceed-

ing the speciﬁed tyre load-bearing capa-

city or the permissible speed rating

(run-ﬂat tyres only for certain wheels)

MO1 = Mercedes-Benz Original (only cer-

tain AMG tyres)

*

NOTE Possible wheel and tyre damage

when driving over obstacles

Exceeding the load-bearing capacity of the

tyres can lead to tyre damage and could cause

the tyres to explode.

Otherwise, certain properties, such as han-

dling characteristics, vehicle noise emissions,

consumption, etc. could be adversely aﬀec-

ted. Furthermore, other tyre sizes could result

in the tyres rubbing against the body and axle

components when loaded. This could result in

damage to the tyre or the vehicle.

Large wheels have a smaller section width. As

the section width decreases, the risk of

wheels and tyres being damaged when driving

over obstacles increases.

#

Therefore, only use tyre types and sizes

approved for your vehicle model.

Observe the tyre load-bearing capacity

rating and speed rating required for your

vehicle.

#

Avoid obstacles or drive especially care-

fully.

Only use tyres, wheels and accessories that

have been checked and recommended by

Mercedes-Benz.

#

Reduce your speed when driving over

kerbs, speed bumps, manhole covers

and potholes.

*

NOTE Vehicle and tyre damage caused by

non-approved tyre types and sizes

#

Avoid particularly high kerbs.

For safety reasons, only use tyres, wheels and

accessories which have been specially

*

NOTE Risk to driving safety from retrea-

ded tyres

approved by Mercedes-Benz for your vehicle.

*

NOTE Possible wheel and tyre damage

when parking on kerbs or in potholes

Retreaded tyres are neither tested nor recom-

mended by Mercedes-Benz, since previous

damage cannot always be detected on retrea-

ded tyres.

For this reason driving safety cannot be guar-

anteed.

These tyres are specially adapted to the active

safety systems, such as ABS, ESP^®and

4MATIC, and marked as follows:

Parking on kerbs or in potholes can damage

the wheels and tyres.

R

MO = Mercedes-Benz Original

#

Only park on level surfaces if possible.

Avoid kerbs and potholes when parking.

#

F206 0105 02

Wheels and tyres

659

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 qualiﬁed specialist workshop and

enquire about:

#

Use i M+S tyres at outside tempera-

tures of less than 7 °C.

Only use tyres suitable for the intended

use.

*

NOTE Damage to electronic component

parts due to the use of tyre-ﬁtting tools

Vehicles with tyre pressure monitoring sys-

tem: there are electronic component parts in

the wheel.

If tyre-ﬁtting tools are positioned in the area of

the valve, the electronic components could be

damaged.

Observe the following when selecting, ﬁtting and

replacing tyres:

R

Suitability

R

Legal stipulations

Country-speciﬁc requirements for tyre

approval that deﬁne a speciﬁc tyre type for

R

Factory recommendations

#

Tyre-ﬁtting tools should not be applied in

the area of the valve.

Always have tyres changed at a qualiﬁed

specialist workshop.

your vehicle.

&

R

WARNING Risk of accident with sport

tyres

Furthermore, the use of certain tyre types in

#

certain regions and areas of operation can be

highly beneﬁcial.

The special tyre tread in combination with the

optimised tyre compound means that the risk

of skidding or aquaplaning on wet roads is

increased.

R

Only use tyres and wheels of the same type

*

NOTE Damage to summer tyres at low

ambient temperatures

(summer tyres, winter tyres, MOExtended

tyres) and the same make.

At low ambient temperatures, tears could form

when driving with summer tyres, causing per-

manent damage to the tyre.

R

Only ﬁt wheels of the same size on one axle

In addition, the tyre grip is greatly reduced at

a low outside temperature and tyre running

temperature.

(leꢀ and right).

It is only permissible to ﬁt a diﬀerent wheel

size in the event of a ﬂat tyre in order to drive

to the specialist workshop.

Do not make any modiﬁcations to the brake

system, the wheels or the tyres.

#

At temperatures below 7 °C use i

Switch on the ESP^®and adapt your driv-

#

M+S tyres.

ing style accordingly.

R

F206 0105 02

Wheels and tyres

660

R

The use of shims or brake dust shields is not

permitted and may invalidate the vehicle's

general operating permit.

Vehicles with a tyre pressure monitoring sys-

tem: all ﬁtted wheels must be equipped with

functioning sensors for the tyre pressure mon-

itoring system.

At temperatures below 7°C use winter tyres or

all-season tyres marked i M+S for all

wheels.

When replacing with tyres that do not feature

run-ﬂat characteristics: vehicles with

MOExtended tyres are not equipped with a

TIREFIT kit at the factory. Equip the vehicle

with a TIREFIT kit aꢀer replacing with tyres

that do not feature run-ﬂat characteristics,

e.g. winter tyres.

R

The tyres wear unevenly and aﬀect the

roadworthiness of the vehicle.

ABS, ESP^®and cruise control operation

are restricted.

R

This can jeopardise road safety.

#

Only use tyre types that have been

approved for the maximum permissible

speed set and the vehicle.

%

You can permanently limit the maximum

speed for driving with winter tyres

(/ page 349).

Winter tyres provide the best possible grip in

wintry road conditions.

For more information on wheels and tyres, con-

tact a qualiﬁed specialist workshop.

Notes on interchanging wheels

R

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

tread.

Observe the maximum permissible speed for

the M+S tyres ﬁtted.

If the tyre's maximum speed is below that of

the vehicle, this must be indicated by an

appropriate label in the driver's ﬁeld of vision.

Run in new tyres at moderate speeds for the

ﬁrst 100 km.

&

Vehicles with AMG Driver's Package

WARNING Risk of injury through diﬀerent

wheel sizes

&

WARNING Risk of accident caused by

non-approved tyre types

Interchanging the front and rear wheels can

severely impair the driving characteristics.

The disk brakes or wheel suspension compo-

nents may also be damaged.

If you use tyre types that have not been adap-

ted to changes made to the factory speed

limit, this can have the following consequen-

ces:

#

Only interchange the front and rear

wheels if the wheels and tyres have the

same dimensions.

R

The tyres are not suitable for high speeds

and the corresponding driving dynamics.

Replace the tyres aꢀer six years at the latest,

regardless of wear.

F206 0105 02

Wheels and tyres

661

Interchanging the front and rear wheels if the

wheels or tyres have diﬀerent dimensions can

render the general operating permit invalid.

Observe the instructions and safety notes on

"Changing a wheel" (/ page 657)

Notes on storing wheels

The maximum load capacity of the jack can

be found on the sticker aﬃxed to the jack.

The jack is maintenance-free. If there is a

malfunction, please contact a qualiﬁed spe-

cialist workshop.

When storing wheels, observe the following notes:

R

Aꢀer removing wheels, store them in a cool,

dry and preferably dark place.

R

Protect the tyres from contact with oil, grease

or fuel.

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

in the boot.

The wear patterns on the front and rear wheels

diﬀer:

R

%

front wheels wear more on the tyre shoulder

rear wheels wear more in the centre of the

tyre

When stowing the tool bag, make sure that it

is adequately secured.

Overview of the tyre-change tool kit

R

Apart from some country-speciﬁc variants, vehi-

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

Consult a qualiﬁed specialist workshop to ﬁnd out

which wheel change tool is necessary and

approved for a wheel change on your vehicle.

You require the following tools, forexample, to

change a wheel:

Do not drive with tyres that have too little tread

depth. This signiﬁcantly reduces traction on wet

roads (aquaplaning).

On vehicles with the same front and rear wheel

size, you can interchange the wheels every

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

Ensure the direction of rotation is maintained for

the wheels.

R

Jack

R

Chock

R

Wheel wrench

Centring pin

The tool bag contains:

R

Jack

R

%

Gloves

The jack weighs approximately 3.4 kg.

R

Wheel wrench

F206 0105 02

Wheels and tyres

662

R

Centring pin

Folding chock

Ratchet for jack

The vehicle is on solid, non-slippery and level

ground.

The required tyre-change tool kit is available.

Removing and ﬁtting the wheel trim/hub caps

R

Requirements

R

The vehicle is prepared for a wheel change

(/ page 662).

%

If your vehicle is not equipped with the tyre-

change tool kit, consult a qualiﬁed specialist

workshop to ﬁnd out about suitable tools.

Apply the electric parking brake manually.

Move the front wheels to the straight-ahead

position.

Plug-in hybrid

Plastic hub cap

To remove:

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

on the boot ﬂoor.

#

Turn the centre cover of the hub cap anti-

clockwise and remove the hub cap.

To ﬁt:

#

Shiꢀ the transmission to position j.

#

Make sure that the centre cover of the hub

cap is turned anti-clockwise.

Vehicles with level control system: set the nor-

mal vehicle level .

Switch oﬀ the vehicle.

#

Position the hub cap and turn the centre cover

#

clockwise until the hub cap engages physically

and audibly.

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.

#

Unload the vehicle.

Preparing the vehicle for a wheel change

Requirements:

R

The vehicle is not on a slope.

F206 0105 02

Wheels and tyres

663

Aluminium hub cap

Raising the vehicle when changing a wheel

Requirements

R

There are no persons in the vehicle.

R

The vehicle has been prepared for a wheel

change (/ page 662).

Important notes on using the jack:

R

Use only a vehicle-speciﬁc jack that has been

approved by Mercedes-Benz to raise the vehi-

cle.

R

The jack is only designed for raising and hold-

To remove:

ing the vehicle for a short time while a wheel

is being changed and not for maintenance

work under the vehicle.

#

Position socket 2 from the tyre-change tool

kit on hub cap 1.

R

The jack must be placed on a ﬁrm, ﬂat and

#

Position wheel spanner 3 on socket 2.

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

#

Using wheel spanner 3, turn hub cap 1

anti-clockwise and remove it.

load-bearing, non-slip underlay.

R

The foot of the jack must be positioned verti-

cally under the jack support point.

To ﬁt:

Rules of conduct when the vehicle is raised:

#

Follow the instructions above in reverse order.

Speciﬁed tightening torque: 25 Nm.

R

Never place your hands or feet under the vehi-

cle.

%

R

Never lie under the vehicle.

F206 0105 02

Wheels and tyres

664

R

Do not start the vehicle and do not release the

electric parking brake.

Do not open or close any doors or the boot

lid.

*

NOTE Damage to the vehicle due to the

jack

R

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.

#

Take the ratchet out of the tyre-change tool kit

and place it on the hexagon nut of the jack so

that the letters "AUF" are visible.

Position of the jack support points

&

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.

#

Using the wheel wrench, loosen the wheel

bolts on the wheel you wish to change by

about one full turn. Do not unscrew the

screws completely.

#

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.

F206 0105 02

Wheels and tyres

665

Removing a wheel

Requirements

R

The vehicle is raised (/ page 663).

When changing a wheel, avoid applying any force

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

comfort when braking.

*

NOTE Damage to the wheels' plastic ele-

ments when changing a wheel

#

Screw centring pin 1 into the thread instead

Plastic elements on wheels may be damaged

when removing and repositioning the wheel.

of the wheel bolt.

Unscrew the remaining wheel bolts com-

pletely.

Remove the wheel.

#

Do not raise the wheels by the plastic

elements when removing and reposition-

ing.

#

Position support 2 of jack 4 on jack sup-

port point 1.

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 tyre is raised a maxi-

mum of 3 cm from the ground.

Loosen and remove the wheel (/ page 665).

Fit the new wheel (/ page 665).

*

NOTE Damage to threading from dirt on

wheel bolts

Fitting a new wheel

Requirements

#

Do not place wheel bolts in sand or on a

dirty surface.

R

The wheel to be changed is removed and the

#

centring pin is screwed in (/ page 665).

#

Unscrew the uppermost wheel bolt com-

pletely.

F206 0105 02

Wheels and tyres

666

&

*

WARNING Risk of accident from losing a

wheel

NOTE Damage to the ceramic brake disc

when changing a wheel

WARNING Risk of injury from tightening

wheel bolts and nuts

Oiled or greased wheel bolts can cause the

wheel bolts to come loose, as too can dam-

aged wheel bolts or wheel hub threads.

If you tighten the wheel bolts or wheel nuts

when the vehicle is raised, the jack could tip.

Mercedes-AMG vehicles with ceramic brake

discs: during removal and repositioning of the

wheel, the wheel rim can strike the ceramic-

brake disc and damage it.

#

Only tighten wheel bolts or wheel nuts

when the vehicle is on the ground.

#

Never oil or grease the threads.

#

Take particular care.

#

In the event of damage to the threads,

#

Be sure to observe the instructions and safety

notes on "Changing a wheel" (/ page 657).

#

contact a qualiﬁed specialist workshop

Ask another person for assistance or use

a second centring pin.

immediately.

#

For safety reasons, only use wheel bolts which

have been approved by Mercedes-Benz and

for the wheel in question.

Tighten the wheel bolts evenly in a diagonal

pattern in the order indicated until they are

ﬁnger-tight.

#

Have the damaged wheel bolts or dam-

aged hub threads replaced.

*

NOTE Damage to the wheels' plastic ele-

ments when changing a wheel

#

Do not continue driving.

Plastic elements on wheels may be damaged

when removing and repositioning the wheel.

#

Observe the information on the choice of tyres

(/ page 657).

#

Do not raise the wheels by the plastic

#

Unscrew and remove the centring pin.

Tighten the last wheel bolt until it is ﬁnger-

tight.

elements when removing and reposition-

ing.

For tyres with a speciﬁed direction of rotation, an

arrow on the side wall of the tyre indicates the

correct direction of rotation. Observe the direc-

tion of rotation when ﬁtting.

#

Lower the vehicle (/ page 667).

Slide the wheel to be mounted onto the cen-

tring pin and push it on.

Note on AMG vehicles:

F206 0105 02

Wheels and tyres

667

Lowering the vehicle aꢀer a wheel change

&

Emergency spare wheel

Notes on the emergency spare wheel

WARNING Risk of accident due to incor-

rect tightening torque

Requirements

R

The new wheel has been ﬁtted (/ page 665).

The wheels could come loose if the wheel

bolts or wheel nuts are not tightened to the

prescribed torque.

&

WARNING Risk of accident caused by

incorrect wheel and tyre dimensions

#

To lower the vehicle: place the ratchet onto

the hexagon nut of the jack so that the letters

"AB" are visible and turn anti-clockwise.

#

The wheel or tyre size and the tyre type of the

emergency spare wheel or spare wheel and

the wheel to be replaced may diﬀer. The emer-

gency spare wheel or spare wheel can signiﬁ-

cantly impair driving characteristics of the

vehicle.

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 qualiﬁed specialist work-

shop and have the tightening torque

checked immediately.

To prevent hazardous situations:

#

Drive carefully.

#

Check the tyre pressure of the newly ﬁtted

#

Never ﬁt more than one emergency

wheel and adjust it if necessary.

spare wheel or spare wheel that diﬀers

%

The following does not apply if the new wheel

is an emergency spare wheel.

Vehicles with a tyre pressure monitoring sys-

tem: restart the tyre pressure monitoring sys-

tem (/ page 657).

in size.

#

Only use an emergency spare wheel or

spare wheel brieﬂy.

Do not deactivate ESP^®.

Have the emergency spare wheel or

#

Tighten the wheel bolts evenly in a diagonal

#

pattern in the order indicated 1 to 5 with

#

an initial maximum force of 80 Nm.

#

Tighten the wheel bolts evenly in a diagonal

pattern in the order indicated 1 to 5 with

the speciﬁed tightening torque of 150 Nm.

spare wheel of a diﬀerent size replaced

at the nearest qualiﬁed specialist work-

F206 0105 02

Wheels and tyres

668

tion reliably. For a few minutes aꢀer an emer-

gency spare wheel is ﬁtted, the system may

still display the tyre pressure of the removed

wheel. Only restart the system again when the

emergency spare wheel has been replaced

with a new wheel.

Requirements:

shop. The new wheel must have the cor-

rect dimensions.

R

The emergency spare wheel has been ﬁtted

correctly. (/ page 662)

%

The emergency spare wheel is secured in the

emergency spare wheel bag in the boot.

Observe the following notes on ﬁtting an emer-

gency spare wheel:

%

Comply with the manufacturer's safety notes

on the sticker of the emergency spare wheel

and on the tyre inﬂation compressor.

Be sure to also observe the following further rela-

ted subjects:

#

Remove the sticker with the inscription

80 km/h from the tyre inﬂation compressor

and aﬃx it to the instrument cluster within the

driver's ﬁeld of vision.

R

The maximum permissible speed with an

emergency spare wheel ﬁtted is 80 km/h.

Do not ﬁt the emergency spare wheel with

snow chains.

Replace the emergency spare wheel aꢀer six

years at the latest, regardless of wear.

R

Notes on tyre pressure (/ page 654)

R

Tyre pressure table (/ page 655)

R

#

R

Remove the tyre inﬂation compressor from the

stowage space under the boot ﬂoor.

(/ page 61)

Notes on ﬁtting tyres (/ page 657)

R

Fitting an emergency spare wheel

(/ page 662)

R

Use the wheel bolts that are included with the

emergency spare wheel.

Inﬂating the emergency spare wheel

R

Check the tyre pressure of the emergency

spare wheel ﬁtted. Correct the pressure as

*

NOTE Overheating due to the tyre inﬂation

compressor running too long

necessary.

#

%

The speciﬁed tyre pressure is stated on the

Do not run the tyre inﬂation compressor

for longer than ten minutes without inter-

ruption.

label of the emergency spare wheel.

Vehicles with a tyre pressure monitoring sys-

tem: if an emergency spare wheel is ﬁtted, the

tyre pressure monitoring system cannot func-

F206 0105 02

Wheels and tyres

669

#

Pull ﬁller hose 1 and plug 3 out of the tyre

inﬂation compressor housing.

Insert plug 7 of ﬁller hose 1 in the socket

on the tyre inﬂation compressor and then turn

it until plug 7 engages.

Unscrew the cap from the valve on the emer-

gency spare wheel.

Screw union nut 2 of ﬁller hose 1 onto the

valve.

Make sure on and oﬀ switch 4 of the tyre

inﬂation compressor is set to 0.

Insert plug 3 in a socket in your vehicle.

Cigarette lighter socket

Press on/oﬀ switch 4 on the tyre inﬂation

compressor to I.

The tyre inﬂation compressor is switched on.

The tyre is inﬂated. The tyre pressure is shown

on manometer 5.

Stow ﬁller hose 1 and plug 3 in the lower

section of the tyre inﬂation compressor hous-

ing.

Stow the tyre inﬂation compressor in the vehi-

cle.

#

Pump the tyre to the speciﬁed tyre pressure.

#

%

The speciﬁed tyre pressure is stated on the

label of the emergency spare wheel.

When the speciﬁed tyre pressure has been

reached, press on/oﬀ switch 4 on the tyre

inﬂation compressor to 0.

The tyre inﬂation compressor is switched oﬀ.

Press the start/stop button to switch oﬀ the

power supply.

If the tyre pressure is higher than the speciﬁed

pressure, press pressure release valve button

6 until the correct tyre pressure has been

reached.

Unscrew union nut 2 of ﬁller hose 1 from

the valve.

#

R

12 V socket (/ page 215)

R

Observe the notes on the cigarette lighter in

the Digital Owner's Manual

Observe the notes on sockets (/ page 215).

R

#

Press the start/stop button once to switch on

the power supply (/ page 260).

Screw the valve cap of the emergency spare

wheel onto the valve again.

F206 0105 02

Wheels and tyres for Your Mercedes C Class 4 Door 2023

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