2014 MERCEDES-BENZ B-CLASS SPORTS Owners Manual

Useful information
............................312
Importan tsafet ynotes .................... 312
Operation ........................................... 312
Winter operation ............................... 314
Tir ep ressure ..................................... 315
Loading the vehicle ..........................323
Maximum load rating .......................327
Uniform Tir eQualit yGrading
Standards .......................................... 328
Tir elabeling ....................................... 329
Definition of terms for tires and
loading ............................................... 333
Changing awheel ............................. 336
Wheel and tir ecombinations ...........340
Emergency spar ewheel ................... 342 311Wheels and tires

Useful information
i This Operator's Manual describes all
models and all standard and optional
equipment of your vehicle available at the
time of publication of the Operator's
Manual. Country-specific differences are
possible. Please not ethat your vehicle may
not be equipped with all features
described. This also applies to safety-
related system sand functions.
i Read the information on qualified
specialist workshops: (Y page 25).Important safet
ynotes G
WARNING
If wheels and tires of the wrong size are used,
the wheel brakes or suspension components
may be damaged. There is arisk of an
accident.
Always replac ewheels and tires with those
that fulfill the specifications of the original
part.
When replacing wheels, make sure to use the
correct:
R designation
R model
When replacing tires, make sure to use the
correct:
R designation
R manufacturer
R model G
WARNING
Af lat tir eseverely impairs the driving,
steerin gand braking characteristics of the
vehicle. There is arisk of accident.
Tires without run-flat characteristics:
R do not drive with aflat tire.
R immediately replac ethe flat tir ewith your
emergenc yspare wheel or spare wheel, or
consult aqualified specialist workshop. Tires with run-flat characteristics:
R
pay attention to the information and
warnin gnotices on MOExtended tires (tires
with run-flat characteristics).
Accessories that are not approved for your
vehicle by Mercedes-Ben zorthat are not
being used correctly can impair operating
safety.
Before purchasing and using non-approved
accessories, visit aqualified specialist
workshop and inquire about:
R suitability
R legal stipulations
R factory recommendations
Information on dimensions and types of
wheels and tires for your vehicle can be found
(Y page 340).
Information on air pressure for the tires on
your vehicle can be found:
R on the vehicle's Tire and Loading
Information placard on the B-pillar
R on the tire pressure label on the fuel filler
flap
R under "Tire pressure"
i Further information on wheels and tires
can be obtained at any qualified specialist
workshop. Operation
Information on driving
R If the vehicle is heavily loaded, check the
tire pressures and correct them if
necessary.
R While driving, pay attention to vibrations,
noises and unusual handling
characteristics, e.g. pulling to one side.
This may indicate that the wheels or tires
are damaged. If you suspect that atire is
defective, reduce your speed immediately.
Stop the vehicle as soon as possible to
check the wheels and tires for damage.
Hidden tire damage could also be causing 312
OperationWheels and tires

the unusual handling characteristics
.Ifyou
find no signs of damage, have the wheels
and tires checked at aqualified specialist
workshop.
R When parking your vehicle, make sure that
the tires do not get deformed by the curb
or other obstacles. If it is necessary to drive
over curbs, speed humps or similar
elevations, try to do so slowly and at an
obtuse angle. Otherwise, the tires,
particularly the sidewalls, may be
damaged. Regular checking of wheels and tires
G
WARNING
Damaged tires can cause tire inflation
pressure loss. As aresult, you could lose
control of your vehicle. There is arisk of
accident.
Check the tires regularly for signs of damage
and replace any damaged tires immediately.
Regularly check the wheels and tires of your
vehicle for damage at least once amonth, as
well as after driving off-road or on rough
roads. Damaged wheels can cause aloss of
tire pressure. Pay particular attention to
damage such as:
R cuts in the tires
R punctures
R tears in the tires
R bulges on tires
R deformation or severe corrosion on wheels
Regularly check the tire tread depth and the
condition of the tread across the whole width
of the tire (Y page 313). If necessary, turn
the front wheels to full lock in order to inspect
the inner side of the tire surface.
All wheels must have avalve cap to protect
the valve against dirt and moisture. Do not
mount anything ontot he valve other than the
standard valve cap or other valve caps
approved by Mercedes-Benz for your vehicle. Do not use any other valve caps or systems,
e.g. tire pressure monitoring systems.
Regularly check the pressure of all the tires
particularly prior to long trips. Adjust the tire
pressure as necessary (Y
page 315).
The service life of tires depends, among other
things, on the following factors:
R Drivin gstyle
R Tire pressure
R Distance covered Important safety notes on the tire
tread
G
WARNING
Insufficient tire tread will reduce tire traction.
The tire is no longer able to dissipate water.
This means that on wet road surfaces, the risk
of hydroplaning increases, in particular where
speed is not adapted to suit the driving
conditions. There is arisk of accident.
If the tire pressure is too high or too low, tires
may exhibit different levels of wear at
different locations on the tire tread. Thus, you
should regularly check the tread depth and
the condition of the tread across the entire
width of all tires.
Minimum tire tread depth for:
R Summer tires: 0014in (3 mm)
R M+S tires: 0015in (4 mm)
For safety reasons, replace the tires before
the legally prescribed limit for the minimum
tire tread depth is reached. Operation
313Wheels and tires Z

Bar indicator
001Afor trea dwearisi ntegrated
into the tire tread.
Treadwear indicator s(TWI) are required by
law. Six indicator sare positioned on the tire
tread. The yare visible once the trea ddepth
is approximately 0003in (1.6 mm). If this is the
case ,the tire is so worn that it mus tbe
replaced. Selecting, mounting and replacing
tires
R Only mount tires and wheels of the same
type and make.
Exception: it is permissible to install a
different type or make in the event of aflat
tire. Observe the "MOExtended tires (tires
with run-flat characteristics" section
(Y page2 95).
R Only mount tires of the correct size onto
the wheels.
R After mounting new tires, brea kthem in at
moderate speeds for the first 60 miles
(100 km), as they only reach their full
performance after this distance.
R Do not drive with tires which have too little
tread depth, as this significantly reduces
the traction on wet roads (hydroplaning).
R Replace the tires after six years at the
latest, regardless of wear. MOExtended tires (tires with run-flat
properties)
With MOExtended tires (tires with run flat
characteristics), you can continue to drive
your vehicle even if there is atotal loss of
pressure in one or more tires.
MOExtended tires may only be used in
conjunction with an active tire pressure loss
warning system and only on wheels
specifically tested by Mercedes-Benz.
Notes on driving with MOExtended tires with
af lat tire (Y page 295). i
Vehicles equipped with MOExtended tires
are not equipped with aTIREFIT kit at the
factory. It is therefore recommended that
you additionallye quip your vehicle with a
TIREFIT kit if you mount tires that do not
feature run-flat properties, e.g. winter tires.
AT IREFIT kit can be obtained from a
qualified specialist workshop. Winter operation
General notes
Have your vehicle winterproofed at aqualified
specialist workshop at the onset of winter.
Observe the notes in the "Changing awheel"
section (Y page 336). Driving with summer tires
At temperatures below 45 ‡(+7 †), summer
tires lose elasticity and therefore traction and
braking power. Change the tires on your
vehicle to M+S tires. Using summe rtires at
very cold temperatures coul dcause cracks to
form, thereb ydamaging the tires
permanently. Mercedes-Benz cannot accept
responsibility for this type of damage. M+S tires
G
WARNING
M+S tires with atire tread depth of less than
0015 in (4 mm) are not suitabl efor use in winter
and do not provide sufficient traction. There
is ar isk of an accident.
M+S tires with atread depth of less than 0015
in (4 mm) must be replaced immediately.
At temperatures below 45 ‡(+7 †), use
winter tires or all-season tires. Both type sof
tire are identified by the M+S marking.
Only winter tires bearing the 000Esnowflake
symbol in addition to the M+S marking
provide the best possibl egrip in wintry road
conditions. Only these tires will allow driving 314
Winte
roperationWheels and tires

safety systems such as ABS and ESP
®
to
function optimally in winter. These tires have
been developed specifically for driving in
snow.
Use M+S tires of the same make and tread on
all wheels to maintain safe handling
characteristics.
Alwayso bserve the maximum permissible
speed specified for the M+S tires you have
mounted.
Once the winter tires are mounted:
X Check the tire pressures (Y page 319).
X Restart the tire pressure loss warning
system (Y page 319).
For more information on driving with the
emergency spare wheel, see (Y page 342).Snow chains
G
WARNING
If snow chains are mounted on the rear
wheels, the snow chains could cause abrasion
to the vehicle body or to chassis components.
This could cause damage to the vehicle or the
tires. There is arisk of an accident.
To avoid hazardous situations:
R never mount snow chains on the rear
wheels
R 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 vehicle or tires, observe the "Wheel and
tire combinations" section under "Tires and
wheels".
For safety reasons, Mercedes-Benz
recommends that you only use snow chains
that have been speciallya pproved for your
vehicle by Mercedes-Benz,ora re of a
corresponding standard of quality. If you intend to mount snow chains, please
bear the following points in mind:
R
Snow chains may not be mounted on all
wheel/tire combinations. Permissible
wheel-tire combinations (Y page 340).
R Only use snow chains when driving on
roads completely covered by snow.
Remove the snow chains as soon as
possible when you come to aroad that is
not snow-covered.
R Local regulations may restrict the use of
snow chains. Observe the appropriate
regulations if you wish to mount snow
chains.
R Do not exceed the maximum permissible
speed of 30 mph (50 km/h).
R When snow chains are installed, never use
Active Parking Assist (Y page 175).
i You can deactivate ESP ®
(Y page 68)
when pulling away with snow chains
installed. You can thereby allow the wheels
to spin in acontrolled manner ,achieving an
increased driving force (cutting action).
Information about driving with an emergency
spare wheel (Y page 342). Tire pressure
Tire pressur
especifications G
WARNING
Underinflated or overinflated tires pose the
following risks:
R the tires may burst, especially as the load
and vehicle speed increase.
R the tires may wear excessively and/or
unevenly, which may greatly impair tire
traction.
R the driving characteristics, as well as
steering and braking, may be greatly
impaired.
There is arisk of an accident. Tirep
ressure
315Wheels and tires
Z

Follow recommende
dtire inflation pressures
and check the pressure of al lthe tires
including the spare wheel:
R monthly, at least
R if the loa dchanges
R before beginning along journey
R under different operating conditions, e.g.
off-roa ddriving
If necessary ,correct the tire pressure.
Use asuitabl epressure gaug etocheck the
tire pressure. The outer appearance of atire
doe snot permit any reliabl econclusio nabout
the tire pressure. On vehicles equipped with
the electronic tire pressure monitor, the tire
pressure can be checked in the on-board
computer.
The recommended tire pressures for the tires
mounted at the factory can be found on the
labels described here.
1.) Tirea nd Loading Information placard
on the B-pillar on the driver' sside of the
vehicle (Y page 323).
The Tire and Loading Information placard
contains 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. 001A
Recommended tire pressures
Option 2) Tire pressuret ableon the inside
of the fuel filler flap.
The tire pressure table contains the
recommended pressures for cold tires for various operating conditions, i.e. differing
load and speed conditions.
i
Specifications shown in the examples of
tire pressure tables are for illustration
purposes only. Tire pressure specifications
are vehicle-specific and may deviate from
the data shown here. Tire pressure
specifications applicable to your vehicle
are located in your vehicle's tire pressure
table. Example: tire pressure table for all tires permitted
for this vehicle by the factory
If
at ire size precedes atire pressure, the tire
pressure information following is only valid
for that tire size. The load conditions" partially
laden" and "fully laden" are defined in the
table for different numbers of occupants and
amounts of luggage. The actual number of
seats may differ. Example: tire pressure table with tire dimensions
Some tire pressure tables show only the rim
diameters instead of the full tire size, e.g.
R18.R
im diameter is part of the tir esize and 316
Tir
ep ressureWheels and tires

can be found on the tire sidewall
(Y
page 330). If the tire pressures have bee
nset to the
lower values for lighter loads and/or lower
road speeds, the pressures should be reset
to the higher values:
R if you want to drive with an increased load
and/or
R if you want to drive at higher road speeds.
i The tire pressures for increased loads
and/or higher road speeds, shown in the
tire pressure table, may have anegative
effec tond riving comfort.
If the tire pressure is not set correctly, this
can lead to an excessive build up of heat and
as udden loss of pressure.
For more information ,contact aqualified
specialist workshop. Important notes on tirep
ressure G
WARNING
If the tire pressure drops repeatedly, the
wheel, valve or tire may be damaged. Tire
pressure that is too low may result in atire
blow-out. There is arisk of an accident.
R Check the tire for foreign objects.
R Check whether the wheel is losing air or the
valve is leaking.
If you are unable to rectify the damage,
contact aqualified specialist workshop. G
WARNING
If you fit unsuitable accessories ontot ire
valves, the tire valves may be overloaded and
malfunction, which can cause tire pressure
loss. Due to their design, retrofitted tire
pressure monitors keep the tire valve open.
This can also result in tire pressure loss. There
is ar isk of an accident.
Only screw the standard valve cap or other
valve caps approved by Mercedes-Ben zfor
your vehicle onto the tire valve.
Use asuitable pressure gauge to check the
tire pressure. The outer appearance of atire
does not permit any reliable conclusion about
the tire pressure.
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
pressures when the tires are cold.
The tires are cold:
R if the vehicle has been parked without
direct sunlight on the tires for at least three
hours and
R if the vehicle has not been driven further
than 1mile (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. Tire pressure
317Wheels and tires Z

Observe the recommended tire pressures for
cold tires:
R on the Tire and Loading Information placard
on the B-pillar on the driver's side
R in the tire pressure table on the inside of
the fuel filler flap Underinflated or overinflated tires
Underinflation G
WARNING
Tires with pressure that is too low can
overheat and burst as aconsequence. In
addition, they also suffer from excessive and/
or irregularw ear, which can severely impair
the braking properties and the driving
characteristics. There is arisk of an accident.
Avoid tire pressures that are too low in all the
tires, including the spare wheel.
Underinflated tires may:
R wear quickly and unevenly
R have an adverse effec tonfuel consumption
R overheat, leadin gtotired efects
R have an adverse effect on handling
characteristics
Overinflation G
WARNING
Tire swithe xcessively high pressur ecan burst
because they are damaged mor eeasily by
road debris, potholes etc. In addition ,they
also suffer from irregular wear, whic hcan
severel yimpair th ebraking properties and the
driving characteristics .There is arisk of an
accident.
Avoid tire pressures that are too high in all the
tires, including the spare wheel.
Overinflated tires may:
R have an adverse effect on handling
characteristics
R wear quickly and unevenly R
be more susceptible to damage
R have an adverse effect on ride comfort
R increase the braking distance
Maximum tire pressures Never exceed the maximum permissible tire
inflation pressure. Always observe the
recommended tire pressure for your vehicle
when adjusting the tire pressure
(Y
page 315). 001A
Example: maximum permissible tire
pressure
i The actual values for tires are vehicle-
specific and may deviate from the values in
the illustration. Checking the tire pressures
Important safety notes Observe the "Tire pressure information"
section (Y
page 315).
Information on air pressure for the tires on
your vehicle can be found:
R on the vehicle's Tire and Loading
Information placard on the B-pillar
R on the tire pressure label on the fuel filler
flap
R in the "Tire pressure information "section 318
Tire pressureWheels and tires