Get Wheels and tires -> Tire pressure Guide for Mercedes B Class SUV Second Generation (2011-2017)

to the vehicle body or to chassis components.

This could cause damage to the vehicle or the

tires. There is a risk of an accident.

To avoid hazardous situations:

never mount snow chains on the rear

wheels

only mount snow chains in pairs on the

front wheels.

On some tire sizes there is not enough space

for snow chains. To avoid damage to the vehi-

cle or tires, observe the "Wheel and tire com-

binations" section under "Tires and wheels".

For safety reasons, Mercedes-Benz recom-

mends that you only use snow chains that have

been specially approved for your vehicle by

Mercedes-Benz, or are of a corresponding

standard of quality. For more information,

please contact a qualified specialist workshop.

If you intend to mount snow chains, please bear

the following points in mind:

Snow chains may not be mounted on all

wheel/tire combinations. Permissible wheel-

tire combinations (Y page 279).

Only use snow chains when driving on roads

completely covered by snow. 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 mount snow chains.

Do not exceed the maximum permissible

speed of 30 mph (50 km/h).

Do not use Parking Pilot when snow chains

are installed (Y page 142).

You may wish to deactivate ESP

(Y page 62)

when pulling away with snow chains installed .

You can thereby allow the wheels to spin in a

controlled manner, achieving an increased driv-

ing force (cutting action).

Tire pressure

Tire pressure specifications

Important safety notes

WARNING

Underinflated or overinflated tires pose the

following risks:

the tires may burst, especially as the load

and vehicle speed increase.

the tires may wear excessively and/or

unevenly, which may greatly impair tire

traction.

the driving characteristics, as well as steer-

ing and braking, may be greatly impaired.

There is a risk of an accident.

Follow recommended tire inflation pressures

and check the pressure of all the tires includ-

ing the spare wheel:

monthly, at least

if the load changes

before beginning a long journey

under different operating conditions, e.g.

off-road driving

If necessary, correct the tire pressure.

The data on the Tire and Loading Informa-

tion placard and tire pressure table shown

here are examples. Tire pressure specifica-

tions are vehicle-specific and may deviate

from the data shown here. The tire pressure

specifications that are valid for your vehicle

can be found on the Tire and Loading Infor-

mation placard and tire pressure table on the

vehicle.

General notes

The recommended tire pressures for the tires

mounted at the factory can be found on the

labels described here.

Further information on tire pressures can be

obtained at a qualified specialist workshop.

260

Tire pressure

Wheels and tires

Tire and Loading Information placard

Recommended tire pressures

The Tire and Loading Information placard is on

the B-pillar on the driver's side (Y page 266).

The Tire and Loading Information placard con-

tains the recommended tire pressures for cold

tires. The recommended tire pressures are valid

for the maximum permissible load and up to the

maximum permissible vehicle speed.

Tire pressure table

The tire pressure table is on the inside of the

charge socket flap. It shows the tire pressure for

all tires permitted at the factory for this vehicle;

see illustration (example).

The tire pressure table contains the recommen-

ded pressures for cold tires for various operat-

ing conditions, i.e. differing load and speed con-

ditions.

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

lowing tire pressure information is only valid for

that tire size; see illustration (example).

The load conditions "partially laden" and "fully

laden" are defined in the table for different num-

bers of occupants and amounts of luggage. The

actual number of seats may differ.

Some tire pressure tables show only the rim

diameters instead of the full tire size, e.g. R18.

Rim diameter is part of the tire size and can be

found on the tire sidewall (Y page 270).

If the tire pressures have been set to the lower

values for lighter loads and/or lower road

speeds, the pressures should be reset to the

higher values:

if you want to drive with an increased load

and/or

if you want to drive at higher speeds

The tire pressures for increased loads and/

or higher road speeds, shown in the tire pres-

sure table, may have a negative effect on driv-

ing comfort.

If the tire pressure is not set correctly, this can

lead to an excessive build up of heat and a sud-

den loss of pressure.

For more information, contact a qualified spe-

cialist workshop.

Tire pressure

261

Wheels and tires

Important notes on tire pressure

WARNING

If the tire pressure drops repeatedly, the

wheel, valve or tire may be damaged. Tire

pressure that is too low may result in a tire

blow-out. There is a risk of an accident.

Check the tire 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.

WARNING

If you fit unsuitable accessories onto tire

valves, the tire valves may be overloaded and

malfunction, which can cause tire pressure

loss. Due to their design, retrofitted tire pres-

sure monitors keep the tire valve open. This

can also result in tire pressure loss. There is a

risk of an accident.

Only screw the standard valve cap or other

valve caps approved by Mercedes-Benz for

your vehicle onto the tire valve.

Use a suitable pressure gauge to check the tire

pressure. The outer appearance of a tire does

not permit any reliable conclusion about the tire

pressure. You can also check the tire pressure

using the on-board computer.

The tire temperature and pressure increase

when the vehicle is in motion. This is dependent

on the driving speed and the load.

Therefore, you should only correct tire pres-

sures when the tires are cold.

The tires are cold:

if the vehicle has been parked with the tires

out of direct sunlight for at least three hours

and

if the vehicle has been driven less than 1 mile

(1.6 km)

The tire temperature changes depending on the

outside temperature, the vehicle speed and the

tire load. If the tire temperature changes by

18 ‡ (10 †), the tire pressure changes by

approximately 10 kPa (0.1 bar/1.5 psi). Take

this into account when checking the pressure of

warm tires. Only correct the tire pressure if it is

too low for the current operating conditions. If

you check the tire pressure when the tires are

warm, the resulting value will be higher than if

the tires were cold. This is normal. Do not

reduce the tire pressure to the value specified

for cold tires. The tire pressure would otherwise

be too low.

Observe the recommended tire pressures for

cold tires:

on the Tire and Loading Information placard

on the B-pillar on the driver's side

in the tire pressure table in the charge socket

flap (Y page 124)

Underinflated or overinflated tires

Underinflated tires

WARNING

Tires with pressure that is too low can over-

heat and burst as a consequence. In addition,

they also suffer from excessive and/or irreg-

ular wear, which can severely impair the brak-

ing properties and the driving characteristics.

There is a risk of an accident.

Avoid tire pressures that are too low in all the

tires, including the spare wheel.

Underinflated tires may:

overheat, leading to tire defects

adversely affect handling

wear excessively and/or unevenly

have an adverse effect on energy consump-

tion

Overinflated tires

WARNING

Tires with excessively high pressure can burst

because they are damaged more easily by

road debris, potholes etc. In addition, they

also suffer from irregular wear, which can

severely impair the braking properties and the

driving characteristics. There is a risk of an

accident.

Avoid tire pressures that are too high in all the

tires, including the spare wheel.

262

Tire pressure

Wheels and tires

Overinflated tires may:

increase the braking distance

adversely affect handling

wear excessively and/or unevenly

have an adverse effect on ride comfort

be more susceptible to damage

Maximum tire pressures

Example: maximum permissible tire pres-

sure

Never exceed the maximum permissible tire

inflation pressure. Always observe the recom-

mended tire pressure for your vehicle when

adjusting the tire pressure (Y page 260).

The actual values for tires are vehicle-spe-

cific and may deviate from the values in the

illustration.

Checking the tire pressures

Important safety notes

Observe the notes on tire pressure

(Y page 260).

Information on air pressure for the tires on your

vehicle can be found:

on the vehicle's Tire and Loading Information

placard on the B-pillar

in the tire pressure table in the charge socket

flap (Y page 124)

in the "Tire pressure" section

Checking tire pressures manually

To determine and set the correct tire pressure,

proceed as follows:

Remove the valve cap of the tire that is to be

checked.

Press the tire pressure gauge securely onto

the valve.

Read the tire pressure and compare it to the

recommended value on the Tire and Loading

Information placard or the tire pressure table

(Y page 260).

If the tire pressure is too low, increase the tire

pressure to the recommended value.

If the tire pressure is too high, release air. To

do so, press down the metal pin in the valve,

using the tip of a pen for example. Then check

the tire pressure again using the tire pressure

checker.

Screw the valve cap onto the valve.

Repeat these steps for the other tires.

Tire pressure monitor

General notes

If a tire pressure monitor is installed, the vehi-

cle's wheels have sensors that monitor the tire

pressures in all four tires. The tire pressure mon-

itor warns you if the pressure drops in one or

more of the tires. The tire pressure monitor only

functions if the corresponding sensors are

installed in all wheels.

Information on tire pressures is displayed in the

multifunction display. After a few minutes of

driving, the current tire pressure of each tire 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 tire pressure electronically"

section (Y page 265).

Tire pressure

263

Wheels and tires

Important safety notes

WARNING

Each tire, including the spare (if provided),

should be checked at least once every two

weeks when cold and inflated to the pressure

recommended by the vehicle manufacturer

on the Tire and Loading Information placard

on the driver's door B-pillar or the tire pres-

sure label on the inside of the fuel filler flap. If

your vehicle has tires of a different size than

the size indicated on the Tire and Loading

Information placard or, if available, the tire

pressure label, you should determine the

proper tire 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

are significantly underinflated. Accordingly,

when the low tire pressure telltale lights up,

you should stop and check your tires as soon

as possible, and inflate them to the proper

pressure. Driving on a significantly underin-

flated tire causes the tire to overheat and can

lead to tire failure.

Underinflation also reduces fuel efficiency

and tire tread life, and may affect the vehicle's

handling and stopping ability. Please note that

the TPMS is not a substitute for proper tire

maintenance, and it is the driver's responsi-

bility to maintain correct tire pressure, even if

underinflation has not reached the level to

trigger illumination of the TPMS low tire pres-

sure 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 sys-

tem detects a malfunction, the warning lamp

will flash for approximately a minute and then

remain continuously illuminated. This

sequence will be repeated every time the vehi-

cle is started as long as the malfunction

exists. When the malfunction indicator is illu-

minated, the system may not be able to detect

or signal low tire pressure as intended.

TPMS malfunctions may occur for a variety of

reasons, including the installation of incom-

patible replacement or alternate tires or

wheels on the vehicle that prevent the TPMS

from functioning properly. Always check the

TPMS malfunction telltale after replacing one

or more tires or wheels on your vehicle to

ensure that the replacement or alternate Tires

and wheels allow the TPMS to continue to

function properly.

It is the driver's responsibility to set the tire

pressure to that recommended for cold tires

which is suitable for the operating situation

(Y page 260). Note that the correct tire pressure

for the current operating situation must first be

taught-in to the tire pressure monitor. If a sub-

stantial loss of pressure occurs, the warning

threshold for the warning message is aligned to

the taught-in reference values. Restart the tire

pressure monitor after adjusting the pressure of

the cold tires (Y page 265). The current pres-

sures are saved as new reference values. As a

result, a warning message will appear if the tire

pressure drops significantly.

The tire pressure monitor does not warn you of

an incorrectly set tire pressure. Observe the

notes on the recommended tire pressure

(Y page 260).

The tire pressure monitor is not able to warn you

of a sudden loss of pressure, e.g. if the tire is

penetrated by a foreign object. In the event of a

sudden loss of pressure, bring the vehicle to a

halt by braking carefully. Avoid abrupt steering

movements.

The tire pressure monitor has a yellow warning

lamp in the instrument cluster for indicating

pressure loss or a malfunction. Whether the

warning lamp flashes or lights up indicates

whether a tire pressure is too low or the tire

pressure monitor is malfunctioning:

if the warning lamp is lit continuously, the tire

pressure on one or more tires is significantly

too low. The tire pressure monitor is not mal-

functioning.

if the warning lamp flashes for around a

minute and then remains lit constantly, the

tire pressure monitor is malfunctioning.

In addition to the warning lamp, a message

appears in the multifunction display. Observe

264

Tire pressure

Wheels and tires

the information on display messages

(Y page 185).

It may take up to ten minutes for a malfunction

of the tire pressure monitor to be indicated. A

malfunction will be indicated by the tire pres-

sure warning lamp flashing for approximately

one minute and then remaining lit. When the

malfunction has been rectified, the tire pressure

warning lamp goes out after a few minutes of

driving.

The tire pressure values indicated by the on-

board computer may differ from those meas-

ured at a gas station with a pressure gauge. The

tire pressures shown by the on-board computer

refer to those measured at sea level. At high

altitudes, 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 pressures.

The operation of the tire pressure monitor can

be affected by interference from radio transmit-

ting equipment (e.g. radio headphones, two-way

radios) that may be being operated in or near the

vehicle.

Checking the tire pressure electroni-

cally

Make sure that the SmartKey is in position 2

in the ignition lock (Y page 109).

Press = or ; on the steering wheel to

select the

Serv.Serv.menu.

Press the 9 or : button to select

Tire PressureTire Pressure.

Press the a button.

The current tire pressure of each tire is shown

in the multifunction display.

If the vehicle was parked for longer than

20 minutes, the

Tire pressure will beTire pressure will be

displayed after driving a few minutes

message is shown.

After a teach-in process, the tire pressure mon-

itor automatically detects new wheels or new

sensors. As long as a clear allocation of the tire

pressure value to the individual wheels is not

possible, the

TireTire PressurePressure MonitorMonitor ActiveActive

message is shown instead of the tire pressure

display. The tire pressures are already being

monitored.

Tire pressure monitor warning mes-

sages

If the tire pressure monitor detects a pressure

loss in one or more tires, a warning message is

shown in the multifunction display. The yellow

tire pressure warning lamp then lights up.

If the

Please Correct Tire PressurePlease Correct Tire Pressure

message appears in the multifunction display,

the tire pressure in at least one tire is too low.

The tire pressure must be corrected when the

opportunity arises.

If the

Check Tire PressureCheck Tire Pressure message

appears in the multifunction display, the tire

pressure in one or more tires has dropped

significantly. The tires must be checked.

If the

TireTire PressurePressure WarningWarning TireTire Fail‐Fail‐

ure

ure message appears, the tire pressure in one

or more tires has dropped suddenly. The tires

must be checked.

Observe the instructions and safety notes in the

display messages in the "Tires" section

(Y page 185).

If the wheel positions on the vehicle are rotated,

the tire pressures may be displayed for the

wrong positions for a short time. This is rectified

after a few minutes of driving, and the tire pres-

sures are displayed for the correct positions.

Restarting the tire pressure monitor

When you restart the tire pressure monitor, all

existing warning messages are deleted and the

warning lamps go out. The monitor uses the cur-

rently set tire pressures as the reference values

for monitoring. In most cases, the tire pressure

monitor will automatically detect the new refer-

ence values after you have changed the tire

pressure. However, you can also set reference

values manually as described here. The tire

pressure monitor then monitors the new tire

pressure values.

Set the tire pressure to the value recommen-

ded for the corresponding driving situation on

the Tire and Loading Information placard on

the driver's side B-pillar (Y page 260).

Additional tire pressure for various operating

conditions can be found in the tire pressure

table in the charge socket flap (Y page 124).

Make sure that the tire pressure is correct on

all four wheels.

Make sure that the SmartKey is in position 2

in the ignition lock (Y page 109).

Tire pressure

265

Wheels and tires

Press = or ; on the steering wheel to

select the

Serv.Serv. menu.

Press the 9 or : button to select

Tire PressureTire Pressure.

Press the a button.

The multifunction display shows the current

tire pressure for each tire or the

Tire pres‐Tire pres‐

sure

sure willwill bebe displayeddisplayed afterafter drivingdriving

a few minutesa few minutes 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

TireTire Press.Press. MonitorMonitor RestartedRestarted mes-

sage appears in the multifunction display.

After driving for a few minutes, the system

checks whether the current tire pressures are

within the specified range. The new tire pres-

sures are then accepted as reference values

and monitored.

If you wish to cancel the restart:

Press the % button.

The tire pressure values stored at the last

restart will continue to be monitored.

Radio type approval for the tire pres-

sure monitor

Country Radio type approval number

USA FCC ID: MRXMW2433A

FCC ID: MRXGG4

FCC ID: MRXMC34MA4

Canada IC: 2546A-MW2433A

IC: 2546A-GG4

IC: 2546A-MC34MA4

Loading the vehicle

Instruction labels for tires and loads

WARNING

Overloaded tires can overheat, causing a

blowout. Overloaded tires can also impair the

steering and driving characteristics and lead

to brake failure. There is a risk of accident.

Observe the load rating of the tires. The load

rating must be at least half of the GAWR of

your vehicle. Never overload the tires by

exceeding the maximum load.

Two instruction labels on your vehicle show the

maximum possible load.

(1) The Tire and Loading Information placard is

on the B-pillar on the driver's side. The Tire

and Loading Information placard shows the

maximum permissible number of occu-

pants and the maximum permissible vehicle

load. It also contains details of the tire sizes

and corresponding pressures for tires

mounted at the factory.

(2) The vehicle identification plate is on the B-

pillar on the driver's side. The vehicle iden-

tification plate informs you of the gross

vehicle weight rating. It is made up of the

vehicle weight, all vehicle occupants, the

fuel and the cargo. You can also find infor-

mation about the maximum gross axle

weight rating on the front and rear axle.

The maximum gross axle weight rating is

the maximum weight that can be carried by

one axle (front or rear axle). Never exceed

the maximum load or the maximum gross

axle weight rating for the front or rear axle.

B-pillar, driver's side

266

Loading the vehicle

Wheels and tires

Wheels and tires -> Tire pressure for Your Mercedes B Class SUV Second Generation (2011-2017)

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