Get Wheels and tyres Guide for Mercedes GLA SUV Second Generation (2020-2026)

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

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 qualied specialist workshop.

Notes on regularly inspecting wheels and tyres

WARNING Risk of injury due to damaged

tyres

Damaged tyres can cause tyre pressure loss.

Check the tyres regularly for signs of

damage and replace any damaged tyres

immediately.

WARNING Risk of aquaplaning due to

insucient tyre tread

Insucient 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

tread depth and the condition of the

tread across the entire width of all tyres.

Minimum tread depth for:

Summer tyres: 3 mm

M+S tyres: 4 mm

For safety reasons, replace the tyres

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 tyre pressure (/ page 621).

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 snow chains

WARNING Risk of accident due to incor-

rectly tted snow chains

If you have tted snow chains to the rear

wheels, they may drag against the vehicle

body or chassis components.

Never t snow chains on the rear

wheels.

Only t snow chains on the front wheels

in pairs.

620

Wheels and tyres

F247 0074 02

NOTE Damage to vehicle body or suspen-

sion components caused by tted snow

chains

On 4MATIC vehicles, if you t snow chains on

the rear wheels, you can damage vehicle body

or suspension components.

On 4MATIC vehicles, only t snow chains

on the front wheels.

Observe the following notes when using snow

chains:

Snow chains are only permissible for certain

wheel/tyre combinations. You can obtain

information about this from a Mercedes-Benz

Service Centre.

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 tted, the maximum per-

missible speed is 50 km/h.

Vehicles with Active Parking Assist: do not use

Active Parking Assist when snow chains are

tted.

You can permanently limit the maximum

speed for driving with winter tyres

(/ page 337).

You can deactivate ESP

to pull away

(/ page 328). This allows the wheels to spin,

achieving an increased driving force.

Tyre pressure

Notes on tyre pressure

WARNING Risk of accident due to insu-

cient or excessive tyre pressure

Underinated or overinated tyres pose in par-

ticular the following risks:

The tyres can burst.

The tyres 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 tyre

pressure and check the tyre pressure of

all tyres, 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 tyre pressure, if necessary.

Tyre pressure which is too high or too low can:

Shorten the service life of the tyres.

Cause increased tyre damage.

Adversely aect driving characteristics and

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

Wheels and tyres

621

F247 0074 02

WARNING Risk of accident due to repea-

ted pressure drop in the tyres

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 qualied specialist workshop.

Information on the recommended tyre pressure

for the vehicle's factory-tted tyres can be found

on the tyre pressure table on the inside of the fuel

ller ap (/ page 622).

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.

Only correct tyre pressures when the tyres are

cold. Conditions for cold tyres:

The vehicle has been parked with the tyres out

of direct sunlight for at least three hours.

The vehicle has travelled less than 1.6 km.

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 623).

Notes on trailer operation

Always inate the rear axle tyres to the recom-

mended tyre pressures on the tyre pressure table

for increased load.

Tyre pressure table

The tyre pressure table is on the inside of the fuel

ller ap.

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.

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.

622

Wheels and tyres

F247 0074 02

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 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.

Tyre pressure monitoring system

▌Function of the tyre pressure monitoring sys-

tem

The system checks the tyre pressure and the tyre

temperature of the tyres tted to the vehicle by

means of a tyre pressure sensor.

The tyre pressure and the tyre temperature

appear in the driver's display.

If there is a substantial pressure loss or if the tyre

temperature is excessive, you will be warned with

display messages (/ page 851) or the h

warning lamp in the driver's display

(/ page 880).

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.

In most cases, the tyre pressure monitoring sys-

tem will automatically update the new reference

values aer you have changed the tyre pressure.

You can, however, also update the reference val-

ues by restarting the tyre pressure monitoring

system manually (/ page 624).

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 tyre, for example

there is a malfunction caused by another radio

signal source

▌Checking the tyre pressure with the tyre pres-

sure monitoring system

Requirements

The vehicle is switched on.

Driver display:

Service

Press a to conrm.

One of the following displays appears:

Current tyre pressure of each wheel:

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.

Tyre pressure monitor active: the teach-in

process of the system is not yet complete. The

tyre pressures are already being monitored.

Wheels and tyres

623

F247 0074 02

Compare the current tyre pressure with the

recommended tyre pressure for the current

operating condition (/ page 622). Addition-

ally, observe the notes on cold tyres

(/ page 621).

The values displayed in the driver display may

deviate from those of the tyre pressure gauge

as they refer to sea level. At high elevations,

the tyre pressure values indicated by a pres-

sure gauge are higher than those shown by

the driver display.

▌Restarting the tyre pressure monitoring system

Requirements

The recommended tyre pressure is correctly

set for the respective operating condition on

each of the four wheels (/ page 621).

Restart the tyre pressure monitoring system in the

following situations:

The tyre pressure has changed.

The wheels or tyres have been changed or

newly tted.

Driver's display:

Service

Select Tyre pressure and conrm with a.

Swipe downwards on Touch Control on the

steering wheel.

The Use current tyre pressures as new refer-

ence values?

message is shown in the driver's

display.

Select Yes and conrm the restart with a.

The

Tyre pressure monitor restarted message

is shown in the driver's display.

Current warning messages are deleted and

the h yellow warning lamp goes out.

Aer you have driven for a few minutes, the

system checks whether the current tyre pres-

sures are within the specied range. The cur-

rent tyre pressures are then accepted as refer-

ence values and monitored.

If the tyre pressure levels are not within the

specied range, the

Please correct tyre pres-

sure

message appears.

Tyre pressure loss warning system

▌Function of the tyre pressure loss warning sys-

tem

The tyre pressure loss warning system warns the

driver by means of display messages when there

is a severe tyre pressure loss.

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 tyre, for example

an even pressure loss on more than one tyre

occurs

The system has a restricted or delayed function

particularly in the following situations:

poor ground conditions, e.g. snow or gravel

driving with snow chains

when adopting a very sporty driving style with

high cornering speeds or sudden acceleration

driving with a very heavy or large trailer

624

Wheels and tyres

F247 0074 02

driving with a high load

The tyre pressure loss warning 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 and to check

it.

Be sure to also observe the following further rela-

ted subjects:

Notes on tyre pressure (/ page 621)

Display messages about the tyres

(/ page 851)

▌Restarting the tyre pressure loss warning sys-

tem

Requirements

The recommended tyre pressure is correctly

set for the respective operating condition on

each of the four wheels (/ page 621).

Restart the tyre pressure loss warning system in

the following situations:

The tyre pressure has changed.

The wheels or tyres have been changed or

newly tted.

Driver's display:

Service

Select Tyre pressure and conrm with a.

The

Run Flat Indicator active message

appears in the driver's display.

Press the steering wheel button a to ini-

tiate the restart.

The

Are the current pressure values OK?

message appears in the driver's display.

Select Yes.

Press the steering wheel button a to con-

rm the restart.

The

Run Flat Indicator restarted message

appears in the driver's display.

Be sure to also observe the following related sub-

jects:

Notes on tyre pressure (/ page 621)

Wheel change

Notes on selecting, tting and replacing tyres

WARNING Risk of accident due to incor-

rect wheel and tyre dimensions

If wheels and tyres of the wrong size are tted,

the service brakes or components in the brake

system and in the wheel suspension may be

damaged.

Always replace wheels and tyres with

those that full the specications of the

original part.

For wheels, pay attention to the following:

Designation

Type

For tyres, pay attention to the following:

Designation

Manufacturer

Type

Wheels and tyres

625

F247 0074 02

WARNING Risk of injury through exceed-

ing the specied tyre load-bearing capa-

city or the permissible speed rating

Exceeding the load-bearing capacity of the

tyres can lead to tyre damage and could cause

the tyres to explode.

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.

NOTE Vehicle and tyre damage caused by

non-approved tyre types and sizes

For safety reasons, only use tyres, wheels and

accessories which have been specially

approved by Mercedes-Benz for your vehicle.

These tyres 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 tyres only for certain wheels)

MO1 = Mercedes-Benz Original (only cer-

tain AMG tyres)

Otherwise, certain properties, such as driving

characteristics, vehicle noise emissions, con-

sumption, etc. could be adversely aected.

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.

Only use tyres, wheels and accessories that

have been checked and recommended by

Mercedes-Benz.

NOTE Risk to driving safety from retrea-

ded tyres

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.

Do not use used tyres if you have no

information about their previous usage.

NOTE Possible wheel and tyre damage

when driving over obstacles

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.

Avoid obstacles or drive especially care-

fully.

Reduce your speed when driving over

kerbs, speed bumps, manhole covers

and potholes.

Avoid particularly high kerbs.

NOTE Possible wheel and tyre damage

when parking on kerbs or in potholes

Parking on kerbs or in potholes can damage

the wheels and tyres.

Only park on level surfaces if possible.

Avoid kerbs and potholes when parking.

626

Wheels and tyres

F247 0074 02

NOTE Damage to electronic component

parts due to the use of tyre-tting tools

Vehicles with tyre pressure monitoring sys-

tem: there are electronic component parts in

the wheel.

If tyre-tting tools are positioned in the area of

the valve, the electronic components could be

damaged.

Tyre-tting tools should not be applied in

the area of the valve.

Always have tyres changed at a qualied

specialist workshop.

NOTE Damage to summer tyres at low

ambient temperatures

At low ambient temperatures, tears could form

when driving with summer tyres, causing per-

manent damage to the tyre.

At temperatures below 7 °C use i

M+S tyres.

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

enquire about:

Suitability

Legal stipulations

Factory recommendations

WARNING Risk of accident with sport

tyres

The special tyre tread in combination with the

optimised tyre compound means that the risk

of skidding or aquaplaning on wet roads is

increased.

In addition, the tyre grip is greatly reduced at

a low outside temperature and tyre running

temperature.

Switch on the ESP

and adapt your driv-

ing style accordingly.

Use i M+S tyres at outside tempera-

tures of less than 7 °C.

Only use tyres suitable for the intended

use.

Observe the following when selecting, tting and

replacing tyres:

Country-specic requirements for tyre

approval that dene a specic tyre type for

your vehicle.

Furthermore, the use of certain tyre types in

certain regions and areas of operation can be

highly benecial.

Only use tyres and wheels of the same type

(summer tyres, winter tyres, MOExtended

tyres) and the same make.

Only t wheels of the same size on one axle

(le and right).

It is only permissible to t a dierent wheel

size in the event of a at tyre in order to drive

to the specialist workshop.

Do not make any modications to the brake

system, the wheels or the tyres.

Wheels and tyres

627

F247 0074 02

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 tted 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.

Winter tyres provide the best possible grip in

wintry road conditions.

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

tread.

Observe the maximum permissible speed for

the M+S tyres tted.

If the tyre's maximum speed is below that of

the vehicle, this must be indicated by an

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

Run in new tyres at moderate speeds for the

rst 100 km.

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

regardless of wear.

When replacing with tyres that do not feature

run-at characteristics: Vehicles with

MOExtended tyres are not equipped with a

TIREFIT kit at the factory. Equip the vehicle

with a TIREFIT kit aer replacing with tyres

that do not feature run-at characteristics,

e.g. winter tyres.

You can permanently limit the speed for driv-

ing with winter tyres (/ page 337).

For more information on wheels and tyres, con-

tact a qualied specialist workshop.

Vehicles with an AMG Driver's Package

WARNING Risk of accident caused by

non-approved tyre types

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:

The tyres are not suitable for high speeds

and the corresponding driving dynamics.

The tyres wear unevenly and aect the

roadworthiness of the vehicle.

ABS, ESP

and cruise control operation

are restricted.

This can jeopardise road safety.

Only use tyre types that have been

approved for the maximum permissible

speed set and the vehicle.

Notes on interchanging wheels

WARNING Risk of injury through dierent

wheel sizes

Interchanging the front and rear wheels can

severely impair the driving characteristics.

The disk brakes or wheel suspension compo-

nents may also be damaged.

Only interchange the front and rear

wheels if the wheels and tyres have the

same dimensions.

628

Wheels and tyres

F247 0074 02

Interchanging the front and rear wheels if the

wheels or tyres have dierent dimensions can

render the general operating permit invalid.

Observe the instructions and safety notes on

"Changing a wheel" (/ page 625).

The wear patterns on the front and rear wheels

dier:

front wheels wear more on the tyre shoulder

rear wheels wear more in the centre of the

tyre

Do not drive with tyres that have too little tread

depth. This signicantly 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.

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 tyres from contact with oil, grease

or fuel.

Overview of the tyre-change tool kit

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

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

For more information on which tyre-changing

tools are required and approved for performing a

wheel change on your vehicle, consult a qualied

specialist workshop.

You require the following tools, forexample, to

change a wheel:

Jack

Chock

Wheel wrench

Centring pin

The jack weighs approximately 3.4 kg.

The maximum load capacity of the jack can

be found on the sticker axed to the jack.

The jack is maintenance-free. If there is a

malfunction, please contact a qualied spe-

cialist workshop.

The tyre-change tool kit is located in tool bag

in the load compartment.

Depending on the vehicle equipment, the tool

bag may be located in other positions in the

load compartment.

When stowing the tool bag, make sure that it

is adequately secured.

Wheels and tyres

629

F247 0074 02

The tool bag contains:

Jack

Gloves

Wheel wrench

Centring pin

Folding chock

Ratchet for jack

Preparing the vehicle for a wheel change

Requirements

The vehicle is not on a slope.

The vehicle is on solid, non-slippery and level

ground.

The required tyre-change tool kit is available.

If your vehicle is not equipped with the tyre-

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.

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.

If necessary, remove the wheel trim/hub caps

(/ page 630).

Raise the vehicle (/ page 630).

Removing and tting the wheel trim/hub caps

Requirements

The vehicle is prepared for a wheel change

(/ page 630).

Plastic hub cap

To remove:

Turn the centre cover of the hub cap anti-

clockwise and remove the hub cap.

To t:

Make sure that the centre cover of the hub

cap is turned anti-clockwise.

Position the hub cap and turn the centre cover

clockwise until the hub cap engages physically

and audibly.

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 630).

The wheel trims and hub caps have been

removed (/ page 630).

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.

630

Wheels and tyres

F247 0074 02

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 tailgate.

Using the wheel wrench, loosen the wheel

bolts on the wheel you wish to change by

about one full turn. Do not unscrew the bolts

completely.

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.

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 tyres

631

F247 0074 02

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.

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 support 2 of jack 4 on jack sup-

port point

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 632).

Removing a wheel

Requirements

The vehicle is raised (/ page 630).

Notes on Mercedes-AMG vehicles:

NOTE Damage to the ceramic brake disc

when changing a wheel

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.

Take particular care.

Ask another person for assistance or use

a second centring pin.

When changing a wheel, avoid applying any force

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

comfort when braking.

632

Wheels and tyres

F247 0074 02

NOTE 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 centring pin 1 into the thread instead

of the wheel bolt.

Unscrew the remaining wheel bolts com-

pletely.

Remove the wheel and, if necessary, store it in

the load compartment.

Notes on removing an emergency spare wheel

(/ page 635).

Fitting a new wheel

Requirements

The wheel to be changed is removed and the

centring pin is screwed in (/ page 632).

WARNING Risk of accident from losing a

wheel

Oiled or greased wheel bolts can cause the

wheel bolts to come loose, as too can dam-

aged wheel bolts or wheel hub threads.

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 tyres

(/ page 625).

For tyres with a specied 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 tting.

Note on AMG vehicles:

NOTE Damage to the ceramic brake disc

when changing a wheel

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.

Take particular care.

Ask another person for assistance or use

a second centring pin.

Slide the wheel to be mounted onto the cen-

tring pin and push it on.

Observe the notes on tting an emergency

spare wheel (/ page 635).

Wheels and tyres

633

F247 0074 02

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.

Observe the instructions and safety notes on

"Changing a wheel" (/ page 625).

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

nger-tight.

Unscrew and remove the centring pin.

Tighten the last wheel bolt until it is nger-

tight.

Lower the vehicle (/ page 634).

Lowering the vehicle aer a wheel change

Requirements

The new wheel has been tted (/ page 633).

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.

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 specied tightening torque of 130 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 tyre pressure of the newly tted

wheel and adjust it if necessary.

The following does not apply if the new wheel

is an emergency spare wheel.

Vehicles with a tyre pressure loss warning sys-

tem: restart the tyre pressure loss warning

system (/ page 625).

Vehicles with a tyre pressure monitoring sys-

tem: restart the tyre pressure monitoring sys-

tem (/ page 624).

634

Wheels and tyres

F247 0074 02

Emergency spare wheel

Notes on the emergency spare wheel

WARNING Risk of accident caused by

incorrect wheel and tyre dimensions

The wheel or tyre size and the tyre 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 t 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 deated emergency spare wheel is

secured in the emergency spare wheel bag in

the load compartment and is secured to the

adjustable load compartment oor in the

lower position.

Observe the following notes on removing an emer-

gency spare wheel:

Before stowing the emergency spare wheel,

make sure there is no air le in the tyre.

If necessary, allow the air to escape.

To release air from the tyre: remove the valve

cap of the tyre.

Press down the metal insert in the valve using

a pointed object, e.g. a pen.

Screw the valve cap onto the valve.

Vehicles with adjustable load compartment

oor: always stow the deated emergency

spare wheel in the lower position on the

adjustable load compartment oor.

Observe the following notes on tting an emer-

gency spare wheel:

The maximum permissible speed with an

emergency spare wheel tted is 80 km/h.

Do not t 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 tyre pressure of the emergency

spare wheel tted. Correct the pressure as

necessary.

The specied tyre pressure is stated on the

label of the emergency spare wheel.

Vehicles with a tyre pressure loss warning

system: if an emergency spare wheel is tted,

the tyre pressure loss warning system cannot

function reliably. Only restart the system

again when the emergency spare wheel has

been replaced with a new wheel.

Wheels and tyres

635

F247 0074 02

Vehicles with a tyre pressure monitoring sys-

tem: if an emergency spare wheel is tted, the

tyre pressure monitoring system cannot func-

tion reliably. For a few minutes aer an emer-

gency spare wheel is tted, 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.

Be sure to also observe the following further rela-

ted subjects:

Notes on tyre pressure (/ page 621)

Tyre pressure table (/ page 622)

Notes on tting tyres (/ page 625)

Fitting an emergency spare wheel

(/ page 630)

Inating the emergency spare wheel

NOTE Overheating due to the tyre ination

compressor running too long

Do not run the tyre ination compressor

for longer than ten minutes without inter-

ruption.

Requirements:

The emergency spare wheel has been tted

correctly. (/ page 630)

Comply with the manufacturer's safety notes

on the sticker of the emergency spare wheel

and on the tyre ination compressor.

Remove the sticker with the label 80 km/h

from the tyre ination compressor housing

and ax it to the instrument cluster within the

driver's eld of vision.

Remove the tyre ination compressor from the

stowage space under the luggage compart-

ment oor. (/ page 53)

Pull ller hose 1 and plug 3 out of the tyre

ination compressor housing.

Insert plug 7 of ller hose 1 in the socket

on the tyre ination 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 ller hose 1 onto the

valve.

Make sure on and o switch 4 of the tyre

ination compressor is set to

Insert plug 3 in a socket in your vehicle.

Cigarette lighter socket

636

Wheels and tyres

F247 0074 02

12 V socket: (/ page 206)

Observe the notes on the cigarette lighter in

the Digital Owner's Manual

Observe the notes on sockets: (/ page 206)

Press the start/stop button once to switch on

the power supply (/ page 246).

Press On/O switch 4 on the tyre ination

compressor to

The tyre ination compressor is switched on.

The tyre is inated. The tyre pressure appears

on manometer 5.

Pump the tyre to the specied tyre pressure.

The specied tyre pressure is stated on the

label of the emergency spare wheel.

When the specied tyre pressure has been

reached, press on and o switch 4 on the

tyre ination compressor to

The tyre ination compressor is switched o.

Press the start/stop button to switch o the

power supply.

If the tyre pressure is higher than the specied

pressure, press pressure release valve button

6 until the correct tyre pressure has been

reached.

Unscrew union nut 2 of ller hose 1 from

the valve.

Screw the valve cap of the emergency spare

wheel onto the valve again.

Stow ller hose 1 and plug 3 in the lower

section of the tyre ination compressor hous-

ing.

Stow the tyre ination compressor in the vehi-

cle.

Wheels and tyres

637

F247 0074 02

Wheels and tyres for Your Mercedes GLA SUV Second Generation (2020-2026)

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