2012 MERCEDES-BENZ CLS COUPE warning

message willa
ppear in the multifunction dis-
play.
The tyre pressure warning system does not
warn you of an incorrectly set tyre pressure.
Observe the notes on the recommended tyre
pressure (Y page331).
The tyre pressure loss warning system does
not replace the need to regularl ycheck your
vehicle's tyre pressures, since an even loss of
pressure on severa ltyres at the same time
cannot be detected by the tyre pressure loss
warning system.
The tyre pressure monitor is not abletow arn
you of asudden loss of pressure, e.g. if the
tyre is penetrated by aforeig nobject. In the
event of asudden loss of pressure, bring the
vehicl etoah altbybrakingcarefully. Avoid
abrupt steerin gmanoeuvres.
The function of th etyrep ressur elos sw arning
system is limite dordelayedif:
R snow chains are fitted to you rvehicle's
tyres.
R road conditions are wintry.
R you are driving on sand or gravel.
R you adopt avery sport ydriving style (cor-
nerin gath igh speeds or driving with high
rates of acceleration).
R you are driving with aheavy load (in the
vehicle or on the roof).
Restarting the tyrep ressure loss warn-
ing system Restart the tyre pressure loss warning system
if you have:
R changed the tyre pressure
R changed the wheels or tyres
R fitted new wheels or tyres
X Befor erestarting, make sure that the tyre
pressures are set properly on all four tyres
for the respective operatin gconditions.
The recommended tyre pressures can be
found in the 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, these incorrect values will
be monitored.
X Also observe the notes in the section on
tyre pressures (Y page 331).
X Make sure that the key is in posi-
tion 2(Ypage 141)int he ignition lock.
X Press =or; on the steering wheel
to select the Serv. menu.
X Press the 9or: button to select
Tyre pressure .
X Press the abutton.
The Run Flat Indicator active Restart with OK message appears in the
multifunction display.
If you wish to confirm the restart:
X Press button a.
The Tyre press. now OK? message
appears in the multifunction display.
X Press the 9or: button to select
Yes .
X Press the abutton.
The Run Flat Indicator restarted message appears in the multifunction dis-
play.
After
ateach-in period, the tyre pressure
loss warning system will monitor the set
tyre pressures of all four tyres.
If you wish to cancel the restart:
X Press button %.
or
X When the Tyre press. now OK? message
appears, press the 9or: button to
select Cancel .
X Press the abutton.
The tyre pressure values stored at the last
restart will continue to be monitored. Tyrep
ressure
333Wheels and tyres Z

Tyre pressure monitor
Important safety notes It is the driver's responsibility to set the tyre
pressure to the recommende dcold tyre pres-
sure suitable for the operating situation
(Y page 331). Note that the correc ttyre pres-
sur efor the curren toperating situation must
first be taught-in to the tyre pressure monitor.
If there is asubstantial loss of pressure, the
warning threshold for the warning message is
aligned to the referencev alues taught-in.
Restart the tyre pressure monitor after
adjusting to the cold tyre pressure
(Y page 335). The current pressures are
saved as new referencev alues. This will
ensure that awarning message will only
appearift he 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 331).
The tyre pressure monitor is not able to warn
you of asudden loss of pressure, e.g. if the
tyre is penetrated by aforeign object.Int he
event of asudden loss of pressure, bring the
vehicle to ahalt by braking carefully. Avoid
abrupt steering manoeuvres.
If at yre pressure monitor system is fitted, the
vehicle's wheels have sensors fitted that
monitor 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 pressure monitor only functions if
the corresponding sensors are fitted to all
wheels.
Information on tyre pressures is displayed in
the multifunction display. After afew minutes
of driving, the current tyre pressure of each
tyre is shown in the multifunction display.
The tyre pressure values indicated by the on-
board computer may differ from those meas-
ured at afilling station using apressure
gauge. The tyre pressures shown by the on-
board computer refer to those measured at
sea level. At high altitudes, the tyre pressure values indicated by
apressure 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
transmitting equipment (e.g. radio head-
phones, two-way radios) that may be being
operated in or near the vehicle.
Checking tyrep ressureelectronically X
Make sure that the key is in position
2(Y page 141) in the ignition lock.
X Press the =or; button on the steer-
ing wheel to select the Serv. menu.
X Press the 9or: button to select
Tyre pressure .
X Press the abutton.
The current tyre pressure for each wheel
will be displayed in the multifunction dis-
play.
If the vehicle was parked for longer than
20 minutes the Tyre pressures will be displayed after
afew minutes of driving message is shown.
After ateach-in period, the tyre pressure
monitor automatically recognises new
wheels or new sensors. If aclear allocation of
the tyre pressure values to the individual
wheels is not possible, the Tyre pressure monitor active message is shown instead
of the tyre pressure display. The tyre pres-
sures are already being monitored.
i If an emergency spare wheel is fitted, the
system may continue to show the tyre pres-
sure of the wheel that has been removed
for afew 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. 334
Tyrep
ressureWheels and tyres

Warning messages of the tyre pressure
monitor If the tyre pressure monitor detects
asignifi-
cant pressure loss on one or more tyres, a
warning message is show ninthe multifunc-
tion display. Awarning tone also sounds and
th et yrep ressure warning lamp light supin
th ei nstrumen tcluster.
Eac htyret hatisa ffected by asignificant loss
of pressure is highlighted in th epressure dis-
play.
X If the Please correc ttyrep ressure message appear
sinthemultifunction dis-
play, check th etyrep ressure on all four
wheels and correct it if necessary.
i If th ewheel positions on th evehicle are
interchanged, th etyrep ressure smay be
displayed for th ewrongpositions for a
short time. This is rectified after afew
minute sofdriving,and th etyrep ressures
are displayed for th ecorrec tpositions.
Restarting th etyrep ressure monitor When you restar
tthe tyre pressure monitor,
all existing warning messages are deleted and
the warning lamps go out. The monitor uses
the currently set tyre pressures as the refer-
ence values for monitoring. In most cases, the
tyre pressure monitor will automatically
detect the new referencev alues after you
have changed th etyrep ressure .However,
you can also define reference values man-
uallyasd escribed here. The tyre pressure
monitor then monitors the new tyre pressure
values.
X Use the table on the inside of the fuel filler
flap to ensure that the tyre pressure is set
correctly in all four tyres for the current
operating conditions.
Also observe the notes in the section on
tyre pressures (Y page 331).
X Make sure that the key is in position 2in
the ignition lock. X
Press the =or; button on the steer-
ing wheel to select the Serv. menu.
X Press the 9or: button to select
Tyre pressure .
X Press the abutton.
The multifunction display shows the cur-
rent tyre pressure for each tyre or the
Tyre pressures will be displayed after a few minutes of driving mes-
sage.
X Press the :button.
The multifunction display shows the Use current pressure values as new ref‐
erence values message.
If you wish to confirm the restart:
X Press the abutton.
The Tyre press. monitor restarted message appears in the multifunction dis-
play.
After you have driven for
afew minutes, the
system checksw hether the current tyre
pressures are within the specified range.
The new tyre pressures are then accepted
as reference values and monitored.
If you wish to cancel the restart:
X Press the %button.
The tyre pressure values stored at the last
restart will continue to be monitored.
Radio typea pproval for the tyrep res-
sure monitor In certain countries,
aradio type approval for
the tyre pressure monitor may be required.
The radio type approval number for the tyre
pressure monitor can be found online at:
http://www.mercedes-benz.de/
betriebsanleitung. Tyrep
ressure
335Wheels and tyres Z

Country Radio type approval number
Brazil 1489-10-4415
Dubai TRA, Registered NO
0016161/08
TRA, Registered NO
0016162/08
Morocco MR5527 ANRT 2010
/27. April
2010
MR5526 ANRT 2010/ 27. April
2010 Philip-
pines ESD-1105558C
Singa-
pore Compliance with IDA Standard
N0140-09
South
Africa TA-2008/1068
TA-2008/1069
Changing
awheel Flat tyre
You can find information on wha ttodointhe
event of aflat tyre in the "Breakdown assis-
tance" section (Y page 312). You will also find
information on driving with MOExtended
tyres in the event of aflat tyre.
You can find information on what to do in the
event of aflat tyre in the "Breakdown assis-
tance" section (Y page 312). You will also find
information on driving with MOExtended
tyres in the event of aflat tyre. Interchanging the wheels
G
WARNING
Interchangin gthe front and rear wheels may
severely impair the driving characteristics if
the wheels or tyres have different dimensions.
The wheel brakes or suspension components
may also be damaged. There is arisk of acci-
dent. Interchange front and rear wheels only if the
wheels and tyres are of the same dimensions.
! On vehicles fitted with atyre pressure
monitor, electronic components are loca-
ted in the wheel.
Tyre-fitting tools should not be applied in
the area of the valve, as this could damage
the electronic components.
Only have tyres changed at aqualified spe-
cialist workshop.
Interchangin gthe front and rear wheels of
differing dimensions can render the general
operating permit invalid.
Observe the instructions and safety notes in
the "Fittin gawheel" section (Y page 337).
The wear pattern sonthe front and rear tyres
differ, depending on the operating conditions.
Interchange the wheels before aclear wear
pattern has formed on the tyres. Frontt yres
typically wear more on the shoulders and the
rear tyres in the centre.
On vehicles that have the same size front and
rear wheels, you can interchange the wheels
every 5000km to 10,000 km depending on
the degree of tyre wear. Maintain the direc-
tion of tyre rotation.
Clean the contact surfaces of the wheel and
the brake disc thoroughly every time awheel
is interchanged. Check the tyre pressure and,
if necessary, restart the tyre pressure loss
warning system or the tyre pressure monitor. Direction of rotation
Tyres with aspecified direction of rotation
have additional benefits, e.g. if there is arisk
of aquaplaning. You will only gain these ben-
efits if the correc tdirection of rotation is
observed.
An arrow on the sidewal lofthe tyre indicates
its correc tdirection of rotation. 336
Changing
awheelWheels and tyres

Storing wheels
Storew heels that are not being used in acool,
dry and preferably dark place. Protect the
tyres against oil, grease, petrol and diesel. Cleaning the wheels
G
WARNING
The water jet of circular-jet nozzles (dirt grind-
ers) can cause damage not visible from the
outside to tyres or chassis components. Com-
ponentsd amaged in this way can unexpect-
edly fail. There is arisk of an accident.
Do not use high-pressure cleaners with circu-
lar-jet nozzles to clean the vehicle. Have dam-
aged tyres or chassis components replaced
immediately. Fitting
awheel
Preparing the vehicle X
Stop the vehicle on solid, non-slippery and
leve lground.
X Apply the parking brake.
X Bring the front wheels into the straight-
ahead position.
X Shift the transmission to position P.
X Vehicles with AIRMATIC :make sure that
"normal" leve lisselecte d(Ypage 181).
X Switch off th eengine.
X Vehicles without KEYLESS-GO: remove
th ek eyfrom th eignition lock.
X Vehicles with KEYLESS-GO: open the
driver' sdoor.
The on-board electronics have status 0,
whic hist hesame as th ekeyhaving been
removed.
X Vehicles with KEYLESS-GO: remove the
Start/Sto pbutto nfromt heignition lock
(Y page 141). X
If included in th evehicle equipment,
remove th etyre-chang etoolkit from the
vehicle.
X Secure th evehicle to preven titfrom rolling
away.
i Apart from certain country-specific varia-
tions, the vehicles are not equipped with a
tyre-change tool kit. Some tools for chang-
ing awhee lare specific to the vehicle. For
more information on which tools are
required to perform awhee lchange on your
vehicle, consult aqualified specialist work-
shop.
Necessary wheel-changing tools can
include, for example:
R jack
R whee lchock
R whee lwrench
Securing the vehicle agains trolling
away If your vehicle is equipped with
awheel chock,
it can be foun dinthetyre-change tool kit
(Y page 311).
The folding wheel chock is an additional
securin gmeasur etoprevent th evehicle from
rollin gaway, for example when changin ga
wheel.
X Fold bot hplates upwards :.
X Fold out lower plate ;.
X Guide th elugs on th elower plat efully into
th eo pening sinbase plate =. Changing
awheel
337Wheels and tyres Z

Securing the vehicle on level ground
X
On level ground: place chocks or other
suitabl eitem sunder the front and rea rof
the whee ltha tisd iagonally opposite the
wheel you wish to change. Securing the vehicle on slight downhill gradients
X
On light downhill gradients: place
chocks or other suitablei tems in front of
the wheels of the front and rear axle.
Raising the vehicle G
WARNING
If you do not position the jack correctly at the
appropriate jacking point of the vehicle, the
jack could tip over with the vehicle raised.
There is arisk of injury.
Only position the jack at the appropriate jack-
ing point of the vehicle. The base of the jack
must be positioned vertically, directly under
the jacking point of the vehicle. The following must be observed when raising
the vehicle:
R
to raise the vehicle, only use the vehicle-
specific jack that has been tested and
approved by Mercedes-Benz.Ift he jack is
used incorrectly, it could tip over while the
vehicle is raised.
R the jack is designed only to raise and hold
the vehicle for ashort time while awheel
is being changed. It is not suited for per-
forming maintenance work under the vehi-
cle.
R avoid changing the wheel on uphilla nd
downhill slopes.
R before raising the vehicle, secure it from
rolling awaybya pplying the parking brake
and inserting wheel chocks. Never disen-
gage the parking brake while the vehicle is
raised.
R the jack must be placed on afirm, flat and
non-slip surface. On aloose surface, a
large, load-bearing underlay must be used.
On aslippery surface, anon-slip underlay
must be used, e.g. rubber mats.
R do not use wooden blocks or similar
objects as ajack underlay.O therwise, the
jack will no tbea ble to achiev eits load-
bearin gcapacity due to the restricted
height.
R mak esure that the distanc ebetween the
underside of the tyre sand the groun ddoes
not exceed 3cm.
R never place your hands or feet under the
raised vehicle.
R never lie under the raised vehicle.
R never start the engine when the vehicle is
raised.
R never open or clos eadoor or the boot lid
when the vehicle is raised.
R mak esure that no persons are present in
the vehicle when the vehicle is raised. 338
Changin
gawheelWheels and tyres

X
Unscrew the uppermost wheel bolt com-
pletely.
X Screw centring pin :into the thread
instead of the wheel bolt.
X Unscrew the remaining wheel bolts fully.
X Remove the wheel.
Fitting anew wheel G
WARNING
Oiled or greased wheel bolt sordamaged
wheel bolts/hub threads can cause th ewheel
bolt stoc omeloose .Asa result, you could
lose awheel while driving. There is arisk of
accident.
Never oil or grease wheel bolts. In the event
of damage to the threads, contact aqualified
specialist workshop immediately.H ave the
damage dwheel bolt sorhub threads
replaced/renewed. Do no tcontinue driving. G
WARNING
If you tighten the wheel bolts or wheel nuts
when the vehicle is raised, the jack could tip
over. There is arisk of injury.
Only tighten the wheel bolts or wheel nuts
when the vehicle is on the ground.
Always pay attention to the instructions and
safety notices in "Changing awheel"
(Y page 336).
Only use wheel bolts that have been designed
for the wheel and the vehicle. For safety rea-
sons, Mercedes-Benz recommends that you
only use wheel bolts which have been
approved for Mercedes-Benz vehicles and the
respective wheel.
! AMG vehicle with ceramic brake
discs: during removal and repositionin gof
the wheel, the wheel rim can striket he
ceramic-brake disc and damage it. There-
fore, take precautions and have asecond
person assist you. Alternatively, you can
use asecond centring pin. Positioning
awheel (example: vehicle with emer-
gency spare wheel)
X Clean the wheel and wheel hub contact
surfaces.
X Slide the wheel to be mounted ontot he
centring pin and push it on.
X Tighten the wheel bolts until they are fin-
ger-tight.
X Unscrew the centring pin.
X Tighten the last wheel bolt until it is finger-
tight.
X Vehicles with acollapsible emergency
spare wheel: inflate thecollapsible emer-
gency spare wheel (Y page 352).
Only then lower th evehicle.
Lowering th evehicle G
WARNING
The wheels could work loose if th ewheel nuts
and bolt sare not tightene dtothe specified
tightening torque. There is arisk of accident.
Have the tightening torque immediately
checked at aqualified specialist workshop
after awheel is changed.
! Vehicles with acollapsible emergency
spare wheel: Inflatethe collapsible emer-
gency spare wheel usin gthe tyreinflation
compressor before lowering th evehicle.
The rim could otherwise be damaged. 340
Changing
awheelWheels and tyres

Tyres
CL S2 50 CDIBlueEFFICIENCY Summe
rtyres
R17 Tyres Light-alloy wheels
BA: 245/4
5R1799 YXL BA: 8.0
Jx17H2ET30 BA: 245/45 R17 99
YXLMOExtended 2 BA: 8.0
Jx17H2ET30 BA: 245/45 R17 99
YXL BA: 8.5
Jx17H2ET3 4.5 BA: 245/45 R17 99
YXLMOExtended 2 BA: 8.5
Jx17H2ET3 4.5 R18
Tyres Light-allo
ywheels BA: 255/40 R18 99
YXL3 BA: 8.5
Jx18H2ET3 4.5 BA: 255/40 R18 99
YXLMOExtended 2, 3 BA: 8.5
Jx18H2ET3 4.5 FA: 255/40 R18 99
YXL
FA: 285/35 R18 97 Y 3 FA: 8.5
Jx18H2ET3 4.5
RA: 9.5 Jx18H2ET48 FA: 255/40 R18 99
YXLMOExtended 2
RA: 285/35 R18 97 YMOExtended 2, 3 FA: 8.5
Jx18H2ET3 4.5
RA: 9.5 Jx18H2ET48 R19
Tyres Light-alloy wheels
FA: 255/35 R19 96
YXL4
RA: 285/30 R19 98 YXL3, 4 FA: 8.5
Jx19H2ET3 4.5
RA: 9.5 Jx19H2ET48 All-weather tyres
R18
Tyres Light-alloy wheels
FA: 255/40 R18 99
HXLM+S
RA: 285/35 R18 97 HXLM+S3, 4 BA: 8.5
Jx18H2ET3 4.5
BA: 9.5 Jx18H2ET48 2
MOExtended tyres (tyre sfeaturing run-fla tcharacteristics) only in combination with an active tyre pressure
loss warning system or tyre pressure monitor.
3 Use of snow chains not permitted. Observe the notes under "Snow chains".
4 Observe the notes on "large wheels" in "Wheel/tyre combinations" under "General notes". Wheel and tyrec
ombinations
343Wheels and tyres Z