inflation pressure MERCEDES-BENZ CLS 2014 Owners Manual

Alignment bolt
%Sheet for faulty wheel
Tire inflation compressor
Lugwrench
Fuseallocation chart
XOpenthe trunk lid.
XLift the trunk floor upwards (Ypage 283).
Flat tire
Preparing the vehicle
Your vehicle may be equipped with:
RMOExtended tires (tires with run-flat
properties) (Ypage 321)
Vehicle preparation is not necessary on
vehicles with MOExtended tires.
Ran emergency spare wheel(Ypage 367)
Information on changing/mountingawheel
(Ypage 357).
XStop the vehicle on solid, non-slippery and
level ground, as far away as possible from
traffic.
XSwitch on the hazard warning lamps.
XSecure the vehicle against rolling away
(Ypage 167).
XIf possible, bring the front wheels into the
straight-ahead position.
XVehicles with AIRMATIC: make sure that
"normal" level is selected (Ypage 189).
XSwitch off the engine.
XVehicles without KEYLESS-GO:remove
the SmartKey from the ignition lock.
XVehicles with KEYLESS-GO:open the
driver's door.
The on-board electronicsnow have status
0.This is the same as the SmartKey having
been removed.
XVehicles with KEYLESS-GO:remove the
Start/Stop button from the ignition lock
(Ypage 147).
XAll occupants must get out of the vehicle.
Make sure that they are not endangered as
they do so.
XMake sure that no one is near the danger
area whileawheel is being changed.
Anyone who is not directly assisting in the
wheel change should, for example, stand
behind the barrier.
XGet out of the vehicle. Pay attention to
traffic conditionswhen doing so.
XClose the driver's door.
MOExtended tires (tires with run-flat
properties)
General notes
With MOExtended tires (tires with run flat
characteristics), you can continue to drive
your vehicle even if there isatotal loss of
pressure in one or more tires. The affected
tire must not show any clearly visible damage.
You can recognizeMOExtended tires by the
MOExtended marking which appears on the
sidewall of the tire. You will find this marking
next to the tire size designation, the load-
bearing capacity and the speed index
(Ypage 351).
MOExtended tires may only be used in
conjunction with an active tire pressure loss
warning system or with an active tire pressure
monitor.
If the pressureloss warning message
appearsinthe multifunction display:
RObserve the instructions in the display
messages (Ypage 258).
RCheck the tire for damage.
RIf driving on, observe the following notes.
The maximum driving distance is
approximately 50 miles (80 km) when the
vehicle is partially laden and approximately
18 miles (30 km) when the vehicle is fully
laden.
Flat tire321
Breakdown assistance

and wheels checked ataqualified specialist
workshop.
When parking your vehicle,makesure that
thetires do notget 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
GWARNING
Damaged tires can cause tire inflation
pressure loss. Asaresult, you could lose
control of your vehicle. There isarisk of
accident.
Check the tires regularly for signs of damage
and replace any damaged tires immediately.
Regularly checkthe wheels and tires of your
vehicle for damage at least onceamonth, as
well as after driving off-road or on rough
roads. Damaged wheels can causealoss of
tire pressure. Pay particular attention to
damage such as:
Rcuts in the tires
Rpunctures
Rtears in the tires
Rbulges on tires
Rdeformation or severe corrosion on wheels
Regularly check the tire tread depth and the
condition of the tread across the whole width
of the tire (Ypage 335). If necessary, turn
the front wheels to full lock in order to inspect
the inner side of the tire surface.
All wheels must haveavalve cap to protect
the valve against dirt and moisture. Do not
mount anything onto the valve other than the
standard valve cap or other valve caps
approved by Mercedes-Benzfor 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 (Ypage 338).
Observe the notes on the emergencyspare
wheel (Ypage 367).
The service life of tires depends, among other
things, on the following factors:
RDrivingstyle
RTire pressure
RDistance covered
Important safety notes on the tire
tread
GWARNING
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 isarisk 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:
RSummer tires:in (3 mm)
RM+S tires:in (4 mm)
For safety reasons, replace the tires before
the legally prescribed limit for the minimum
tire tread depth is reached.
Operation335
Wheels and tires
Z

Check
Tirepressure specifications
Important safety notes
GWARNING
Tireswithtirepressuresthatare toolow or
toohigh are associated withthefollowing
hazards:
Rthey can burst, in particular if thevehicle is
heavily laden or when driven at high
speeds.
Rthetires can wear excessively and/or
unevenly, whichcan severely impairtire
traction.
Rthe driving, steeringand braking
characteristics may be severely impaired.
There isarisk of accident.
Follow recommended tireinflation pressures
and checkthe pressure of all the tires
including the spare wheel:
Rmonthly, at least
Rif the load changes
Rbefore beginningalong journey
Runder different operating conditions,e.g.
off-road driving
If necessary, correct the tire pressure.
iThe specifications on the sample Tire and
Loading Information placard and tire
pressure tables are examples. Tire
pressure specifications 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 Information 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
labelsdescribed here.
Operation with the emergency spare
wheel(Ypage 367).
Further information on tire pressures can be
obtained ataqualified specialist workshop.
Tire and Loading Information placard
Recommended tire pressures
The Tire and Loading Information placard is
on the B-pillar on the driver's side
(Ypage 345).
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.
Tire pressuretable
The tire pressure table is on the inside of the
fuel filler flap.
Example: tire pressure table for all tires permittedfor this vehicle by the factory
The tire pressure table contains the
recommended pressures for cold tires for
various operating conditions, i.e. differing
load and speed conditions.
338Check
Wheels and tires

The tires are cold:
Rif the vehicle has been parked without
direct sunlight on the tires for at least three
hours and
Rif the vehicle has been driven for less 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
correctthe 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:
Ron the Tire and Loading Information placard
on the B-pillar on the driver's side
Rin the tire pressure table on the inside of
the fuel filler flap
Ron the yellow label on the emergency spare
wheel (depending on the vehicle
equipment)
Underinflated or overinflated tires
Underinflation
GWARNING
Tires with pressure that is too low can
overheat and burst asaconsequence. In
addition, they also suffer from excessive and/
or irregular wear, which can severely impair
the braking properties and the driving
characteristics. There isarisk of an accident.
Avoid tire pressures that are too low in all the
tires, including the spare wheel.
Underinflated tires may:
Roverheat, leading to tire defects
Rhave an adverse effect on handling
characteristics
Rwear quickly and unevenly
Rhave an adverse effect on fuel consumption
Overinflation
GWARNING
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 isarisk of an
accident.
Avoid tire pressures that are too high in all the
tires, including the spare wheel.
Overinflated tires may:
Rincrease the braking distance
Rhave an adverse effect on handling
characteristics
Rwear quickly and unevenly
Rhave an adverse effect on ride comfort
Rbe more susceptible to damage
Maximum tire pressures
Example: maximum permissible tire
pressure
Never exceed the maximum permissible tire
inflation pressure. Always observe the
recommended tire pressure for your vehicle
340Check
Wheels and tires

Example: current tire pressure display
Important safety notes
GWARNING
Each tire,including the spare (ifprovided),
should be checked at least once every two
weeks when cold and inflated to the pressure
recommended by the vehiclemanufacturer
on the Tire and Loading Information placard
on the driver'sdoor B-pillar or the tire
pressure label on the inside of the fuel filler
flap.Ifyour vehicle has tires ofadifferent size
than the size indicated on the Tire and Loading
Information placard or, if available, the tire
pressure label, you should determinethe
proper tire pressure for those tires.
As an added safety feature, your vehicle has
been equipped withatire pressure monitoring
system (TPMS) that illuminatesalow tire
pressure 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. Drivingona
significantly underinflated 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 notasubstitute for proper tire
maintenance, and it is the driver's
responsibility to maintain correcttire
pressure, even if underinflation 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 detectsamalfunction, the warning
lamp will flash for approximatelyaminute and
then remain continuously illuminated. This
sequence will be repeated every time the
vehicle is started 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 malfunctions may occur foravariety of
reasons, including the installation of
incompatible 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
(Ypage 338). Note that the correcttire
pressure for the current operating situation
must first be taught-in to the tire pressure
monitor. If there isasubstantial loss of
pressure, the warning threshold for the
warning message is aligned to the reference
values taught-in.Restart the tire pressure
monitor after adjustingthe pressure of the
cold tires (Ypage 345). The current
pressures are saved as new reference values.
Asaresult,awarning 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
(Ypage 338).
The tire pressure monitor is not able to warn
you ofasudden loss of pressure, e.g. if the
tire is penetrated byaforeign object. In the
event ofasudden loss of pressure, bring the
vehicle toahalt by brakingcarefully. Avoid
sudden steering movements
Check343
Wheels and tires
Z

the systemmay still display thetire
pressure of theremovedwheel forafew
minutes. The value displayed for the
mountedemergencysparewheel is notthe
same as the current tire pressure of the
emergency spare wheel.
"Minispare" emergency sparewheel/
collapsible sparewheel
Removing the "Minispare" emergency
sparewheel
The emergency spare wheel can be found in
the stowage well under the trunk floor.
XLift the trunk floor upwards (Ypage 283).
XTurn stowage traycounter-clockwise
and remove together with vehicle tool kit
tray.
XRemove "Minispare" emergency spare
wheel$.
Removing the collapsible sparewheel
(AMG vehicles)
The emergency spare wheel can be found in
the stowage wellunderthe trunk floor.
XLift the trunk floor upwards (Ypage 283).
XReach into cutoutin the tool holder and
lift it up.
XRemove collapsiblespare wheel.
Always observe the instructions and safety
notes in the "Mountingawheel" section
(Ypage 358).
Stowingaused collapsible spare
wheel
!Only place the collapsible spare wheel in
the vehicle when it is dry. Otherwise,
moisture may get into the vehicle.
Take the following steps to stowaused
collapsible spare wheel. It will not otherwise
install into the spare wheel well. Mercedes-
Benz recommends that you have this work
performed ataqualified specialist workshop,
e.g. at an authorized Mercedes-Benz Center.
XUnscrew the valve cap from the valve.
XUse the back of the valve cap to unscrew
the valve insert from the valve and release
the air.
iFully deflating the tires can takeafew
minutes.
XScrew the valve insert back into the valve.
XScrew the valve cap back on.
XRemove the protective sheet from the
vehicle tool kit and pull it over the
collapsible spare wheel.
XStow the collapsible spare wheel in the
emergency spare wheel well under the
trunk.
Inflating the collapsible sparewheel
!Inflate the collapsible spare wheel using
the tire inflation compressor before
lowering the vehicle. The wheel rim could
otherwise be damaged.
368Emergency sparewheel
Wheels and tires

!Do not operate the tire inflation
compressor for longer than eight minutes
atatime withoutabreak. It may otherwise
overheat.
The tire inflation compressor can be
operated againonce it hascooleddown.
XMount the collapsiblespare wheelas
described (Ypage 357).
The collapsible spare wheel must be
mounted before it is inflated.
XPull connector!and the air hose out of
the housing.
XRemove the cap from the valve on the
collapsible spare wheel.
XScrew union nuton the air hose ontothe
valve.
XMake sure on/off switchof the tire
inflation compressor is set to0.
XInsert connector!intothe cigarette
lighter socket or intoa12Vsocket in your
vehicle.
Observe the notes on the cigarettelighter
(Ypage 288). Observe the notes on
sockets(Ypage 289).
XTurn the SmartKey to position1in the
ignition lock (Ypage 147).
XPress on/offswitchon thetireinflation
compressor toI.
The tireinflationcompressor is switched
on. The tire is inflated. The tire pressure is
shown on pressure gauge$.
XInflate the tire to the specified tire
pressure.
The specified tire pressure is printed on the
yellow label of the emergencyspare wheel.
XWhen the specified tire pressure has been
reached, press on/offswitchon the
electric air pump to0.
The tireinflationcompressor is switched
off.
XTurn the SmartKey to position0in the
ignition lock.
XIf the tire pressure is higher than the
specified pressure, press pressure release
buttonuntil the correcttire pressure has
been reached.
XUnscrew union nuton the air hose from
the valve.
XScrew the valve cap ontothe collapsible
spare wheel valve again.
XStow plug!and the air hose in the lower
section of the blower housing.
XStow the tire inflation compressor in the
vehicle.
Emergency sparewheel369
Wheels and tires
Z