Get Wheels and tyres -> Tyre pressure Guide for Mercedes CLA 4 Door First Generation (2013-2018)

When you have fitted the M+S tyres:

Check the tyre pressures (Y page 313).

Restart the tyre pressure loss warning system

(Y page 315).

Restart the tyre pressure monitor

(Y page 317).

Information about driving with an emergency

spare wheel (Y page 323).

Snow chains

WARNING

If snow chains are fitted to the rear wheels,

they may scrape against the vehicle body or

chassis components. This could cause dam-

age to the vehicle or the tyres. There is a risk

of an accident.

To avoid hazardous situations:

never fit snow chains on the rear wheels

always fit snow chains in pairs to the front

wheels.

Vehicles with steel wheels: if you fit snow

chains on steel wheels, you may damage the

hub caps. Remove the hub caps from the rel-

evant wheels before fitting the snow chains.

For safety reasons, Mercedes-Benz recom-

mends that you only use snow chains that have

been approved for Mercedes-Benz or that are of

an equivalent standard of quality. For more

information, please contact a qualified special-

ist workshop.

If you wish to fit snow chains, please bear the

following points in mind:

Snow chains cannot be fitted to all wheel/

tyre combinations. Permitted wheel/tyre

combinations (Y page 323).

Use snow chains only if the road surface is

completely snow-covered. Remove the snow

chains as soon as possible when you come to

a road that is not snow-covered.

Local regulations may restrict the use of snow

chains. Observe the appropriate regulations if

you wish to fit snow chains.

do not exceed the maximum permissible

speed of 50 km/h.

do not use Parking Pilot when snow chains are

fitted (Y page 180).

You may wish to deactivate ESP

when pulling

away with snow chains fitted (Y page 70). This

allows the wheels to spin in a controlled manner,

achieving increased propulsive force (cut).

Information about driving with an emergency

spare wheel (Y page 323).

Tyre pressure

Tyre pressure specifications

WARNING

Underinflated or overinflated tyres pose the

following risks:

the tyres may burst, especially as the load

and vehicle speed increase.

the tyres may wear excessively and/or

unevenly, which may greatly impair tyre

traction.

the driving characteristics, as well as steer-

ing and braking, may be greatly impaired.

There is a risk of an accident.

Observe the recommended tyre pressure and

check the tyre pressure of all the tyres includ-

ing the spare wheel:

at least every two weeks

when the load changes

before embarking on a longer journey

for changed operating conditions, e.g. off-

road driving

If necessary, correct the tyre pressure.

WARNING

If you fit unsuitable accessories onto tyre

valves, the tyre valves may be overloaded and

malfunction, which can cause tyre pressure

loss. Due to their design, retrofitted tyre pres-

sure monitors keep the tyre valve open. This

can also result in tyre pressure loss. There is a

risk of accident.

Only screw standard valve caps or valve caps

specifically provided by Mercedes-Benz for

your vehicle onto the tyre valve.

Tyre pressure

313

Wheels and tyres

WARNING

If the tyre pressure drops repeatedly, the

wheel, valve or tyre may be damaged. Tyre

pressure that is too low may result in a tyre

blow-out. There is a risk of accident.

Check the tyre for foreign objects.

Check whether the wheel is losing air or the

valve is leaking.

If you are unable to rectify the damage, con-

tact a qualified specialist workshop.

Environmental note

Check the tyre pressure regularly, at least

every 14 days.

The recommended tyre pressures for various

operating conditions can be found in the tyre

pressure table on the fuel filler flap

(Y page 154).

Operation with an emergency spare wheel:

information on operation with an emergency

spare wheel can be found in the general notes in

the "Emergency spare wheel" section

(Y page 324).

Operation with a trailer: the applicable value

for the rear axle is the maximum value stated in

the tyre pressure table inside the fuel filler flap.

Additionally, the tyre pressure table may also

state tyre pressures for different load condi-

tions. These are defined in the table as different

numbers of passengers and amounts of lug-

gage. The actual number of seats may vary; for

more information, please refer to the vehicle

documents.

If tyre sizes are not specified, the tyre pressures

stated on the tyre pressure table apply for all

tyres approved at the factory for this vehicle.

If a tyre size precedes a tyre pressure, the fol-

lowing tyre pressure information is valid only for

that tyre size.

Use a suitable pressure gauge to check the tyre

pressure. The outer appearance of a tyre does

not give any reliable indication of the tyre pres-

sure. On vehicles fitted with the electronic tyre

pressure monitor, you can also check the tyre

pressure using the on-board computer.

If possible, correct tyre pressures only when the

tyres are cold.

The tyres are cold:

if the vehicle has been parked with the tyres

out of direct sunlight for at least three hours

and

if the vehicle has been driven less than

1.6 km

Depending on the ambient temperature, the

vehicle speed and the load on the tyres, the tyre

temperature and thus the tyre pressure changes

by approximately 10 kPa (0.1 bar/1.5 psi) per

10 †. Take this into account when checking the

pressure of warm tyres. Correct the tyre pres-

sure only if it is too low for the current operating

condition.

Driving with a tyre pressure that is too high or

too low can:

shorten the service life of the tyres

cause increased tyre damage

have a negative effect on handling character-

istics and thus driving safety (e.g. aquaplan-

ing)

The tyre pressure values given for low loads are

minimum values that offer you good driving

comfort characteristics.

However, you can also use the values given for

higher loads. These are permissible and will not

adversely affect the running of the vehicle.

Tyre pressure loss warning system

General notes

While the vehicle is in motion, the tyre pressure

loss warning system monitors the set tyre pres-

sure using the rotational speed of the wheels.

This enables the system to detect significant

pressure loss in a tyre. If the rotational speed of

a wheel changes as a result of a loss of tire

pressure, a corresponding warning message will

appear in the multifunction display.

314

Tyre pressure

Wheels and tyres

You can recognise the tyre pressure loss warn-

ing by the

Run Flat Indicator activeRun Flat Indicator active

Restart with OK

Restart with OK message which appears in

the multifunction display in the

Serv.Serv.menu.

Information on the message display can be

found in the "Restarting the tyre pressure loss

warning system" section (Y page 315).

Important safety notes

The tyre pressure warning system does not warn

you of an incorrectly set tyre pressure. Observe

the notes on the recommended tyre pressure

(Y page 313).

The tyre pressure loss warning system does not

replace the need to regularly check the tyre

pressure. An even loss of pressure on several

tyres at the same time cannot be detected by

the tyre pressure loss warning system.

The tyre pressure loss warning system is not

able to warn you of a sudden loss of air, e.g. if the

tyre is penetrated by a foreign object. In the

event of a sudden loss of air, bring the vehicle to

a halt by braking carefully. Avoid abrupt steering

manoeuvres.

The function of the tyre pressure loss warning

system is limited or delayed if:

snow chains are fitted on your vehicle

road conditions are wintry

you are driving on a loose surface (e.g. sand or

gravel)

you adopt a very sporty driving style (corner-

ing at high speeds or driving with high rates of

acceleration)

you are towing a very heavy or large trailer

you are driving with a heavy load (in the vehi-

cle or on the roof)

Restarting the tyre pressure loss warn-

ing system

Restart the tyre pressure loss warning system if

you have:

changed the tyre pressure

changed the wheels or tyres

fitted new wheels or tyres

Before restarting, make sure that the tyre

pressures are set properly on all four tyres for

the respective operating conditions. The rec-

ommended tyre pressures can be found in the

tyre pressure table on the fuel filler flap.

The tyre pressure loss warning system can

only give reliable warnings if you have set the

correct tyre pressure. If an incorrect tyre

pressure is set, this incorrect value will be

monitored.

Observe the notes in the section on tyre pres-

sures (Y page 313).

Make sure that the key is in position 2 in the

ignition lock (Y page 133).

Press = or ; on the steering wheel to

select the

Serv.Serv.menu.

Press the 9 or : button to select

Tyre pressureTyre pressure.

Press the a button.

The

Run Flat Indicator activeRun Flat Indicator active

Restart with OK

Restart with OK message appears in the

multifunction display.

If you wish to confirm the restart:

Press the a button.

The

TyreTyre press.press. nownow OK?OK? message appears

in the multifunction display.

Press the 9 or : button to select

YesYes.

Press the a button.

The

Run Flat Indicator restartedRun Flat Indicator restarted mes-

sage appears in the multifunction display.

After a teach-in period, the tyre pressure loss

warning system will monitor the set tyre pres-

sures of all four tyres.

If you wish to cancel the restart:

Press the % button.

If the

Tyre press. now OK?Tyre press. now OK? message

appears, press the 9 or : button to

select

CancelCancel.

Press the a button.

The tyre pressure values stored at the last

restart will continue to be monitored.

Tyre pressure monitor

General notes

If a tyre pressure monitor system is fitted, the

vehicle's wheels have sensors fitted that moni-

tor the tyre pressures in all four tyres. The tyre

pressure monitor warns you if the pressure

drops in one or more of the tyres. The tyre pres-

sure monitor functions only if the corresponding

sensors are fitted to all wheels.

Tyre pressure

315

Wheels and tyres

Information on tyre pressures is shown on the

multifunction display. After a few minutes of

driving, the current tyre pressure of each tyre is

shown in the

Serv.Serv. menu of the multifunction

display, see illustration (example).

For information on the message display, refer to

the "Checking the tyre pressure electronically"

section (Y page 316).

Important safety notes

It is the driver's responsibility to set the tyre

pressure to the recommended cold tyre pres-

sure suitable for the operating situation

(Y page 313). Note that the correct tyre pres-

sure for the current operating situation must

first be taught-in to the tyre pressure monitor. If

a substantial loss of pressure occurs, the warn-

ing threshold for the warning message is aligned

to the taught-in reference values. Restart the

tyre pressure monitor after adjusting to the cold

tyre pressure (Y page 317). The current pres-

sures are saved as new reference values. This

ensures that a warning message appears only if

the tyre pressure drops significantly.

The tyre pressure monitor does not warn you of

an incorrectly set tyre pressure. Observe the

notes on the recommended tyre pressure

(Y page 313).

The tyre pressure monitor is not able to warn

you of a sudden loss of pressure, e.g. if the tyre

is penetrated by a foreign object. In the event of

a sudden loss of air, bring the vehicle to a halt by

braking carefully. Avoid abrupt steering

manoeuvres.

The tyre pressure monitor has a yellow warning

lamp on the instrument cluster for indicating a

pressure loss or malfunction. Depending on how

the warning lamp flashes or lights up, a tyre

pressure that is too low or a malfunction in the

tyre pressure monitor is indicated:

If the warning lamp is lit continuously, the tyre

pressure on one or more tyres is significantly

too low. The tyre pressure monitor is not mal-

functioning.

If the warning lamp flashes for around a

minute and then remains lit constantly, the

tyre pressure monitor is malfunctioning.

In addition to the warning lamp, a message

appears on the multifunction display. Observe

the information on display messages

(Y page 239).

It may take up to ten minutes for a malfunction

of the tyre pressure monitor to be indicated. A

malfunction will be indicated by the tyre pres-

sure warning lamp flashing for approximately

one minute and then remaining lit. When the

fault has been rectified, the tyre pressure warn-

ing lamp goes out after you have driven for a few

minutes.

The tyre pressure values indicated by the on-

board computer may differ from those meas-

ured at a filling station using a pressure gauge.

The tyre pressures shown by the on-board com-

puter refer to those measured at sea level. At

high altitudes, the tyre pressure values indica-

ted by a pressure gauge are higher than those

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

do not reduce the tyre pressures.

The operation of the tyre pressure monitor can

be affected by interference from radio transmit-

ting equipment (e.g. cordless headphones, two-

way radios) that may be being operated in or

near the vehicle.

Checking the tyre pressure electroni-

cally

Make sure that the key is in position 2 in the

ignition lock (Y page 133).

Press = or ; on the steering wheel to

select the

Serv.Serv.menu.

Press the 9 or : button to select

Tyre pressureTyre pressure.

Press the a button.

The current tyre pressure for each wheel will

be displayed in the multifunction display.

If the vehicle was parked for longer than

20 minutes, the

Tyre pressures will beTyre pressures will be

displayed

displayed afterafter aa fewfew minutesminutes ofof driv‐driv‐

inging message is shown.

After a teach-in period, the tyre pressure moni-

tor automatically detects new wheels or new

sensors. As long as a clear allocation of the tyre

pressure values to the individual wheels is not

possible, the

TyreTyre pressurepressure monitormonitor activeactive

316

Tyre pressure

Wheels and tyres

message is shown instead of the tyre pressure

display. The tyre pressures are already being

monitored.

After an emergency spare wheel has been fitted,

the system may still display the tyre pressure of

the removed wheel for a few minutes. If this

occurs, note that the value displayed for the

position where the spare wheel is fitted is not

the same as the current tyre pressure of the

emergency spare wheel.

Warning messages of the tyre pressure

monitor

If the tyre pressure monitor detects a pressure

loss in one or more tyres, a warning message is

shown in the multifunction display. The yellow

tyre pressure warning lamp then lights up:

If the

Please correct tyre pressurePlease correct tyre pressure

message appears in the multifunction display,

the tyre pressure in at least one tyre is too

low. The tyre pressure must be corrected

when the opportunity arises.

If the

TyreTyre pressurepressure CheckCheck tyre(s)tyre(s) mes-

sage appears in the multifunction display, the

tyre pressure in one or more tyres has drop-

ped significantly. The tyres must be checked.

If the

Tyre pressure Caution Tyre mal‐Tyre pressure Caution Tyre mal‐

function

function message appears in the multifunc-

tion display, the tyre pressure in one or more

tyres has dropped suddenly. The tyres must

be checked.

Observe the instructions and safety notes in the

display messages in the "Tyres" section

(Y page 239).

If the position of the wheels on the vehicle is

changed, the tyre pressures may be displayed in

the wrong positions for a short time. After a few

minutes of driving, this is rectified and the tyre

pressures are displayed in the correct positions.

Restarting the tyre pressure monitor

When you restart the tyre pressure monitor, all

existing warning messages are deleted and the

warning lamps go out. The monitor uses the cur-

rently set tyre pressures as the reference values

for monitoring. In most cases, the tyre pressure

monitor will automatically detect the new refer-

ence values after you have changed the tyre

pressure. However, you can also set reference

values manually as described here. The tyre

pressure monitor then monitors the new tyre

pressure values.

Use the table on the inside of the fuel filler flap

to ensure that the tyre pressure is set cor-

rectly in all four tyres for the current operating

conditions.

Also observe the notes in the section on tyre

pressures (Y page 313).

Make sure that the key is in position 2 in the

ignition lock (Y page 133).

Press = or ; on the steering wheel to

select the

Serv.Serv.menu.

Press the 9 or : button to select

Tyre pressureTyre pressure.

Press the a button.

The multifunction display shows the current

tyre pressure for each tyre or the

TyreTyre pres‐pres‐

sures

sures willwill bebe displayeddisplayed afterafter aa fewfew

minutes of drivingminutes of driving message.

Press the : button.

The multifunction display shows the

UseUse

current pressures as new reference

valuesvalues message.

If you wish to confirm the restart:

Press the a button.

The

TyreTyre press.press. monitormonitor restartedrestarted mes-

sage appears in the multifunction display.

After you have driven for a few minutes, the

system checks whether the current tyre pres-

sures are within the specified range. The new

tyre pressures are then accepted as refer-

ence values and monitored.

If you wish to cancel the restart:

Press the % button.

The tyre pressure values stored at the last

restart will continue to be monitored.

Radio type approval for the tyre pres-

sure monitor

Country Radio type approval number

Argentina MW2433A

H-12337

GG4

H-12338

Brazil 2770-12-8001

Model: MW2433A

0381-13-8001

Model: GG4

Tyre pressure

317

Wheels and tyres

Wheels and tyres -> Tyre pressure for Your Mercedes CLA 4 Door First Generation (2013-2018)

Related Topics

Popular Owner Manuals

Latest Owner Manuals