Get Wheels and tires -> Tire pressure Guide for Mercedes CLA 4 Door Second Generation (2019-2024)

Monthly

When the load changes

Before embarking on a longer journey

If operating conditions change, e.g. o-

road driving

Adjust the tire pressure, if necessary.

Tire pressure which is too high or too low can:

Shorten the service life of the tires.

Cause increased tire damage.

Adversely aect driving characteristics and

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

WARNINGARNING Risk of accident due to too low

a tire pressure

Tires with pressure that is too low can over-

heat and burst as a consequence.

In addition, they also suer from irregular

wear, which can signicantly impair the brak-

ing properties and the handling characteris-

tics.

Avoid excessively low tire pressure.

Tire pressure which is too low can cause:

Tire malfunctions as a result of overheating

Impaired handling characteristics

Irregular wear

Increased fuel consumption

WARNINGARNING Risk of accident due to too high

a tire pressure

Tires with excessively high pressure can burst.

In addition, they also suer from irregular

wear, which can signicantly impair the brak-

ing properties and the handling characteris-

tics.

Avoid excessively high tire pressures.

Tire pressure which is too high can cause:

Increased braking distance

Impaired handling characteristics

Irregular wear

Impaired driving comfort

Susceptibility to damage

WARNINGARNING Risk of accident due to repea-

ted pressure drop in the tires

The wheels, valves or tires could be damaged.

Too low a tire pressure can lead to the tires

bursting.

Examine the tires for foreign objects.

Check whether the tire has a puncture or

the valve has a leak.

If you are unable to rectify the damage,

contact a qualied specialist workshop.

You can nd information on tire pressure for the

vehicle's factory-installed tires on the following

labels:

Tire and Loading Information placard on the

B‑pillar of your vehicle (/ page 302).

Tire pressure table on the inside of the fuel

ller ap (/ page 297).

Observe the maximum tire pressure

(/ page 308).

Use a suitable pressure gauge to check the tire

pressure. The outer appearance of a tire does not

296296

Wheels and tires

permit any reliable conclusion about the tire pres-

sure.

Only correct tire pressure when the tires are cold.

Conditions for cold tires:

The vehicle has been parked with the tires out

of direct sunlight for at least three hours.

The vehicle has traveled less than 1 mile

(1.6 km).

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

temperature of the tires increases, so too does

the tire pressure.

Vehicles witehicles with a tirh a tire pre pressuressure monite monitororing systing system:em:

You can also check the tire pressure using the on-

board computer.

The tire pressure recommended for increased

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

the ride comfort.

WARNINGARNING Risk of accident due to unsuita-

ble accessories on tire valves

If you mount unsuitable accessories onto tire

valves, the tire valves may be overloaded and

malfunction, which can cause tire pressure

loss.

Only screw standard valve caps or valve

caps specically approved by Mercedes-

Benz for your vehicle onto the tire valve.

TTirire pre pressuressure te tableable

The tire pressure table is on the inside of the fuel

ller ap.

The data shown in the images is example

data.

The tire pressure table shows the recommended

tire pressure for all tires approved for this vehicle.

The recommended tire pressures apply for cold

tires under various operating conditions, i.e. load-

ing and/or speed of the vehicle.

If one or more tire sizes precede a tire pressure,

the following tire pressure information is only valid

for those tire sizes and their respective load con-

dition.

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.

Wheels and tires

297

Some tire pressure tables only show the rim diam-

eter instead of the complete tire size, e.g. R18R18.

The rim diameter is part of the tire size and can

be found on the tire side wall (/ page 309).

Tire and Loading Information placard

(/ page 302)

Maximum tire pressure (/ page 308)

ChecChecking tking the tirhe tire pre pressuressure manuallye manually

Read the tire pressure recommended for the

current operating conditions from the Tire and

Loading Information placard or the tire pres-

sure table. Observe the notes on tire pressure.

Remove the valve cap of the tire to be

checked.

Press the tire pressure gauge securely onto

the valve.

Read the tire pressure.

If the tire pressure is lower than the recom-

mended value, increase the tire pressure to

the recommended value.

If the tire pressure is higher than the recom-

mended value, release air. To do so, press

down the metal pin in the valve, e.g. using the

tip of a pen. Then, check the tire pressure

again using the tire pressure gauge.

Screw the valve cap onto the valve.

Further related subjects:

Notes on tire pressure (/ page 295)

Tire pressure table (/ page 297)

Tire and Loading Information placard

(/ page 302)

TTirire pre pressuressure monite monitororing systing systemem

FFunction of tunction of the tirhe tire pre pressuressure monite monitororing systing systemem

DANANGERGER Risk of accident due to incorrect

tire pressure

Each tire, including the spare (if provided),

should be checked monthly when cold and

inated to the ination pressure recommen-

ded by the vehicle manufacturer on the vehi-

cle placard or tire ination pressure label. (If

your vehicle has tires of a dierent size than

the size indicated on the vehicle placard or

tire ination pressure label, you should deter-

mine the proper tire ination pressure for

those tires.)

As an added safety feature, your vehicle has

been equipped with a tire pressure monitoring

system (TPMS) that illuminates a low tire pres-

sure telltale when one or more of your tires is

signicantly under-inated. Accordingly, when

298298

Wheels and tires

the low tire pressure telltale illuminates, you

should stop and check your tires as soon as

possible, and inate them to the proper pres-

sure. Driving on a signicantlyunder-inated

tire causes the tire to overheat and can lead

to tire failure. Under-ination also reduces fuel

eciency and tire tread life, and may aect

the vehicle’s handling and stopping ability.

Please note that the TPMS is not a substitute

for proper tire maintenance, and it is the driv-

er’s responsibility to maintain correct tire

pressure, even if under-ination has not

reached the level to trigger illumination of the

TPMS low tire pressure telltale.

Your vehicle has also been equipped with a

TPMS malfunction indicator to indicate when

the system is not operating properly. The

TPMS malfunction indicator is combined with

the low tire pressure telltale. When the system

detects a malfunction, the telltale will ash for

approximately one minute and then remain

continuously illuminated. This sequence will

continue upon subsequent vehicle start-ups as

long as the malfunction exists.

When the malfunction indicator is illuminated,

the system may not be able to detect or signal

low tire pressure as intended. TPMS malfunc-

tions may occur for a variety of reasons,

including the installation of replacement or

alternate tires or wheels on the vehicle that

prevent the TPMS from functioning properly.

The system checks the tire pressure and the tire

temperature of the tires installed on the vehicle by

means of a tire pressure sensor.

The tire pressure and the tire temperature appear

in the on-board computer (/ page 299).

If there is a substantial pressure loss or if the tire

temperature is excessive, you will be warned with

display messages (/ page 380) or the h

warning lamp in the instrument cluster

(/ page 400).

The tire pressure monitoring system is only an aid.

It is the driver's responsibility to set the tire pres-

sure to the recommended cold tire pressure suita-

ble for the operating situation.

In most cases, the tire pressure monitoring sys-

tem will automatically update the new reference

values aer you have changed the tire pressure.

You can, however, also update the reference val-

ues by restarting the tire pressure monitoring sys-

tem manually (/ page 300).

Syst

System limitsem limits

The system may be impaired or may not function

particularly in the following situations:

Incorrect reference values were taught in

Sudden pressure loss caused by a foreign

object penetrating the tire, for example

There is a malfunction caused by another

radio signal source

Chec

Checking tking the tirhe tire pre pressuressure wite with th the tirhe tire pre pressureessure

monitmonitororing systing systemem

RReqequiruirements:ements:

The vehicle is switched on.

On-board computer:

Service

Tires

One of the following displays appears:

Current tire pressure and tire temperature of

the individual wheels:

Wheels and tires

299

Tire pressure will be displayed after driving a

few minutes

Tire Pressure Monitor Active: the teach-in

process of the system is not yet complete. The

tire pressures are already being monitored.

Compare the tire pressure with the recom-

mended tire pressure for the current operating

condition (/ page 297). Additionally, observe

the notes on cold tires (/ page 295).

The values displayed in the on-board com-

puter may deviate from those of the tire pres-

sure gauge as they refer to sea level. At high

elevations, the tire pressure values indicated

by a pressure gauge are higher than those

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

do not reduce the tire pressure.

Restestararting tting the tirhe tire pre pressuressure monite monitororing systing systemem

RReqequiruirements:ements:

The recommended tire pressure is correctly

set for the respective operating status on all of

the wheels (/ page 295).

Restart the tire pressure monitoring system in the

following situations:

The tire pressure has changed.

The wheels or tires have been changed or

newly installed.

On-board computer:

Service

Tires

Swipe downwards on Touch Control on the

le-hand side of the steering wheel.

The Use Current Pressures as New Refer-

ence Values

message is shown in the Instru-

ment Display.

To restart, press Touch Control on the le-

hand side of the steering wheel.

The Tire Press. Monitor Restarted message is

shown in the Instrument Display.

Current warning messages are deleted and

the yellow h warning lamp goes out.

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

the system checks whether the current tire

pressures are within the specied range. The

current tire pressures are then accepted as

reference values and monitored.

Be sure to also pay attention to the following rela-

ted topic:

Notes on tire pressure (/ page 295)

TTirire pre pressuressure loss we loss wararning systning systemem

FFunction of tunction of the tirhe tire pre pressuressure loss we loss wararning systning systemem

The tire pressure loss warning system warns the

driver by means of display messages when there

is a severe tire pressure loss.

300300

Wheels and tires

SystSystem limitsem limits

The system may be impaired or may not function

particularly in the following situations:

Incorrect reference values were taught in

Sudden pressure loss caused by a foreign

object penetrating the tire, for example

An even pressure loss on more than one tire

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 high load

The tire pressure loss warning system is only an

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

pressure to the recommended cold tire pressure

suitable for the operating situation and to check

it.

Be sure to also observe the following further rela-

ted subjects:

Notes on tire pressure (/ page 295)

Display messages about the tires

(/ page 380)

Restestararting tting the tirhe tire pre pressuressure loss we loss wararning systning systemem

RReqequiruirements:ements:

The recommended tire pressure is correctly

set for the respective operating status on all

wheels.

Restart the tire pressure loss warning system in

the following situations:

The tire pressure has changed.

The wheels or tires have been changed or

newly installed.

On-board computer:

Service

Tires

Swipe downwards on the Touch Control on the

le-hand side of the steering wheel.

The Tire Pressure Control System Active

Restart

message is shown in the display.

To begin restart, press the Touch Control on

the le-hand side of the steering wheel.

The Tire Pressure Now OK? message is shown

in the display.

Select Yes.

To conrm restart, press the Touch Control on

the le-hand side of the steering wheel.

The Run Flat Indicator Restarted message is

shown in the display.

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

tire pressure loss warning system monitors

the set tire pressures of all the tires.

Be sure to also pay attention to the following rela-

ted topic:

Notes on tire pressure (/ page 295)

Wheels and tires

301

Loading tLoading the vhe vehicleehicle

NNoottes on Tes on Tirire and Loading Infe and Loading Inforormation placardmation placard

WARNINGARNING Risk of accident from overloa-

ded tires

Overloaded tires may overheat and burst as a

consequence. Overloaded tires can also

impair the steering and handling characteris-

tics and lead to brake failure.

Observe the load rating of the tires.

The load rating must be at least half the

permissible axle load of the vehicle.

Never overload the tires by exceeding

the maximum load.

The Tire and Loading Information placard is on the

B-pillar on the driver's side of the vehicle.

Tire and Loading Information placard

The data shown in the illustration is example

data.

The Tire and Loading Information placard shows

the following information:

Maximum number of seats

2 according to

the maximum number of people permitted to

travel in the vehicle.

302302

Wheels and tires

Wheels and tires -> Tire pressure for Your Mercedes CLA 4 Door Second Generation (2019-2024)

Related Topics

Popular Owner Manuals

Latest Owner Manuals