2012 MERCEDES-BENZ CLS COUPE tyre pressure

Tyres
Problem Possible causes/consequence
sand M Solutions
h
The yellow tyr
epres-
sure monitor warning
lamp is on. The tyr
epressure monitor ha sdetecte dalossofp ressure in at
leas tone of the tyres.
G WARNING
With tyr epressures which ar etoo low, ther eisariskoft he fol-
lowing hazards:
R the tyres may burst, especiallyast he load and vehicle speed
increase.
R the tyres may wear excessively and/or unevenly, which may
greatly impair tyre traction.
R the driving characteristics, as well as steering and braking, may
be greatly impaired.
There is arisk of an accident.
X Stop the vehicle without making any sudden steering or braking
manoeuvres. Pay attention to the traffic conditionsasy ou do
so.
X Secure the vehicle against rolling away (Y page 159).
X Observe the additional displaym essages in the multifunction
display.
X If there is aflat tyre, inspect the tyres (Y page 312).
X Check the tyre pressure (Y page 334).
X If necessary, correct the tyre pressure. 270
Warning and indicator lampsint
he instrument clusterOn-board computer and displays

R
Vehicles with akey:
do not remove the key from the ignition
lock. Do not open the driver's door or
front-passenger door when the engine is
switched off. Otherwise, the automatic
transmission selects park position P
automatically and locks the wheels. You
can prevent this by shifting the auto-
matic transmission to Nbeforehand.
R Vehicles with KEYLESS-GO:
do not open the driver's door or front-
passenger door when the engine is
switched off. Otherwise, the automatic
transmission selects park position P
automatically and locks the wheels.
Observe the following to make sure that the
automatic transmission stays in position N:
X Make sure the vehicle is stationary and the
ignition is switched off.
X Turn the key to position 2(Ypage 141) in
the ignition lock.
Use the key instead of the Start/Stop but-
ton on vehicles with KEYLESS-GO.
X Depress and hold the brake pedal.
X Shift the automatic transmission to posi-
tion N.
X Release the brake pedal.
X Release the electric parking brake.
X Switch off the ignition and leave the key in
the ignition lock.
You can wash the vehicle in an automatic car
wash from the very start.
Wash off excess dirt before cleaning the vehi-
cle in an automatic car wash.
After using an automatic car wash, wipe off
wax from the windscreen and the wiper
blades. This will prevent smears and reduce
wiping noises caused by residueont he wind-
screen.
Washing by hand In some countries, washing by hand is only
allowed at specially equipped washing bays. Observe the legal requirements for each indi-
vidual country.
X Do not use hot water and do not wash the
vehicle in direct sunlight.
X Use asoft sponge to clean.
X Use amild cleaning agent, such as acar
shampoo approved by Mercedes-Benz.
X Thoroughly hose down the vehicle with a
gentle jet of water.
X Do not point the water jet directly towards
the air inlet.
X Use plenty of water and rinse out the
sponge frequently.
X Rinse the vehicle with clean water and dry
thoroughly with achamois.
X Do not let the cleaning agent dry on the
paintwork.
When using the vehicle in winter, remove all
traces of road salt deposits carefully and as
soon as possible.
High-pressure cleaninge quipment G
WARNING
Do not use high-pressure cleaners with circu-
lar-jet nozzles (dirt grinders) to clean your
vehicle, in particular the tyres. You could oth-
erwise damage the tyres and cause an acci-
dent.
! Always maintain adistance of at least
30 cm between the vehicle and the high-
pressure cleaner nozzle. Information about
the correct distance is available from the
equipment manufacturer.
Move the high-pressure cleaner nozzle
around when cleaning your vehicle.
Do not aim directly at any of the following:
R tyres
R door gaps, roof gaps, jointse tc.
R electrical components
R battery
R connectors
R lights 302
CareMaintenance and care

MOExtended tyres (tyres with run-flat
characteristics) G
WARNING
When driving in emergency mode, the driving
characteristics deteriorate, e.g. when corner-
ing, accelerating quickly and when braking.
There is arisk of accident.
Do not exceed the stated maximu mspeed.
Avoid abrupt steering and driving manoeu-
vres, and driving over obstacles (kerbs ,pot-
holes, off-road). This applies in particular to a
laden vehicle.
Stop driving in emergency mode if:
R you hear banging noises.
R the vehicle start stoshake.
R you see smok eand smell rubber.
R ESP ®
is intervening constantly.
R ther eare tears in the sidewalls of the tyre.
After driving in emergency mode, have the
wheel rims checked at aqualified specialist
workshop with regard to their further use. The
faulty tyre must be replaced.
With MOExtended tyres (tyres with run-flat
characteristics), you can continue to drive
your vehicle even if ther eisatotal loss of
pressure in one or more tyres.
MOExtended tyres may only be used in con-
junction with an activ etyre pressure loss
warning system or with an activ etyre pres-
sure monitor.
The maximum driving distance is approx-
imately 80 km when the vehicle is partially
laden, and approximately 30 km when the
vehicle is fully laden.
In addition to the vehicle load, the driving dis-
tanc epossible depends upon:
R speed
R road condition
R outside temperature
The driving distanc epossible in run-flat mode
may be reduced by extreme driving condi-
tions/manoeuvres, or it can be increased
through amoderat estyle of driving. The maximum permissible distanc
ewhich
can be driven in run-flat mode is counted from
the momen tthe tyre pressure loss warning
appears in the multifunction display.
You must not exceed amaximum speed of
80 km/h.
i When replacing one or all tyres, make
sure that you only use tyres marked
"MOExtended". Make sure that you only
use the size of tyre specified for the vehicle. TIREFIT kit
Using the TIREFIT kit TIREFIT is
atyre sealant.
You can use TIREFIT to seal punctures of up
to 4m m, particularly those in the tyre tread.
You can use TIREFIT at outside temperatures
down to Ò20 †. G
WARNING
In the following situations, the tyre sealant is
unable to provide sufficient breakdown assis-
tance, as it is unable to seal the tyre properly:
R there are cuts or punctures in the tyre
larger than those mentioned above.
R the wheel rim is damaged.
R you have driven at very low tyre pressures
or on aflat tyre.
There is arisk of accident.
Do not drive any further. Contact aqualified
specialist workshop. G
WARNING
The tyre sealant is harmful and causes irrita-
tion. It must not come into contact with your
skin, eyes or clothing or be swallowed. Do not
inhale TIREFIT fumes. Keep tyre sealant away
from children. There is arisk of injury. Flat tyre
313Breakdown assistance
Z

If you come into contact with the tyre sealant,
observe the following:
R Rinse off the tyre sealant from yours kin
immediately with water.
R If the tyre sealant comes into contact with
youre yes, immediately rinse them thor-
oughly wit hclean water.
R If tyr esealant is swallowed ,immediately
rinse your mout hout thoroughl yand drink
plenty of water. Do no tind ucev omiting,
and see kmedical attention immediately.
R Immediately change out of clothing which
has come into contact with tyre sealant.
R If an allergic reaction occurs ,seek medical
attention immediately.
! Do not operate the tyre inflation com-
pressor for longer than eight minutes at a
time without abreak. It may otherwise
overheat.
The tyre inflation compressor can be oper-
ated again onceith as cooled down.TIREFI
Tsticker, 2-part
X Do not remove any foreign objects which
have penetrated the tyre, e.g. screws or
nails.
X Remove the tyre sealant bottle, the accom-
panying TIREFI Tsticker and the tyre infla-
tion compressor from the stowage well
underneath the boot floor (Y page 311).
X Affix part :of the TIREFI Tsticker within
the driver's field of vision.
X Affix part ;of the TIREFI Tsticke rnearthe
valv eont he whee lwitht he defectiv etyre. X
Pull plug ?with the cable and hose Aout
of the housing.
X Scre whose Aonto flange Bof tyr eseal-
ant bottle :.
X Place tyr esealan tbottle : head down-
wards into recess ;of the tyr einflation
compressor. X
Remov ethe cap fro mvalve Con th efaulty
tyre.
X Screw fille rhose Dontov alveC.
X Insert connector ?into a12V socket
(Y page 283) in your vehicle.
Observe the notes on sockets
(Y page 283).
X Turn the key to position 1in the ignition
lock (Y page 141).
X Press on/offs witch=on th etyrei nflation
compressor to I.
The tyr einflatio ncompressor is switched
on. The tyre is inflated.
i First,t yre sealant is pumped into the tyre.
The pressure can briefly rise to approx-
imately 500 kPa (5 bar/73 psi). 314
Flat tyreBreakdown assistance

Do not switch off th
etyrei nflation com-
pressor during this phase.
X Let th etyrei nflation compressor run for
fiv em inutes. The tyr eshould then have
attained apressur eofatl east180 kPa
(1.8 bar/26 psi).
If at yre pressure of 180 kPa (1.8 bar/
26 psi )has bee nattained after five minutes:
(Y page 315).
If at yrep ressure of 180 kPa (1. 8bar/
26 psi) ha snot been attaine dafter five
minutes: (Y page 315).
i If the tyr esealan tlea ks out, allo wittodry.
It can the nberemove dlikeal ayer of film.
If yo ugettyr es ealant on your clothing,
hav eitc leane dass oonasp ossible with
perchloroethylene.
Tyre pressure not reached If
ap ressure of 180 kPa (1.8 ba r/26 psi )has
not bee nachieved afte rfive minutes:
X Switch off the tyre inflation compressor.
X Unscrew the filler hose fro mthe valve of
the faulty tyre.
X Very slowly drive forwards or reverse
approximately 10 m.
X Pump up the tyre again.
After amaximum of five minutes the tyre
pressure must be at least 180 kPa (1.8 bar/
26 psi). G
WARNING
If the required tyre pressure is not reached
after the specified time, the tyre is too badly
damaged. The tyre sealant cannot repair the
tyre in this instance. Damaged tyres and atyre
pressure that is too low can significantly
impair the vehicle's braking and driving char-
acteristics .There is arisk of accident.
Do not continue driving. Contact aqualified
specialist workshop. Tyrep
ressur ereached G
WARNING
At yre temporarily sealed wit htyres ealant
impairs th edrivin gcharacteristics and is not
suitable for higher speeds .There is arisk of
accident.
You should therefore adapt your driving style
accordingly and drive carefully. Do not exceed
the specified maximum speed with atyre that
has been repaired using tyre sealant.
! After use, excess tyre sealant may run out
of the filler hose. This could cause stains.
Therefore, place the filler hose in the plastic
bag which contained the TIREFIT kit. H
Environmental note
Have the used tyre sealant bottle disposed of
professionally, e.g. at aqualifie dspecialist
workshop.
If at yrep ressur eof180 kP a(1.8 bar/26 psi)
has been attained after five minutes:
X Switc hoff the tyre inflation compressor.
X Unscrew the filler hose from the valve of
the faulty tyre.
X Stow the tyre sealant bottle, the tyre infla-
tion compressor and the warning triangle.
X Pull away immediately.
The maximum speed for atyre sealed with
tyre sealant is 80 km/h. The upper part of
the TIREFI Tsticker must be affixed to the
instrument cluster in the driver's field of
vision.
X Stop after driving for approximately ten
minutes and check the tyre pressure with
the tyre inflation compressor.
The tyre pressure must now be at least
130 kPa (1.3 bar/19 psi). G
WARNING
If the required tyre pressure is not reached
after driving for ashort period, the tyre is too
badly damaged. The tyre sealant cannot
repair the tyre in this instance. Damaged tyres
and atyre pressure that is too low can signif- Flat tyre
315Breakdown assistance
Z

icantly impair the vehicle's braking and driv-
ing characteristics. There is
arisk of accident.
Do not continue driving. Contact aqualified
specialist workshop.
X Correc tthe tyre pressure if it is still at least
130 kPa (1.3 bar/19 psi) (see the fuel filler
flap for values).
X To increase the tyre pressure: switch on
the tyre inflation compressor. X
To reduce the tyre pressure: depress
pressure release button Enext to pres-
sure gauge F.
X If the tyre pressure is correct,u nscrew the
filler hose from the valve of the repaired
tyre.
X Screw the valve cap onto the valve of the
repaired tyre.
X Pull the tyre sealant bottle out of the tyre
inflation compressor.
The filler hose stays on the tyre sealant
bottle.
X Stow the tyre sealant bottle, the tyre infla-
tion compressor and the warning triangle.
X Drive to the nearest qualified specialist
workshop and have the tyre changed there.
X Have the tyre sealant bottle replaced as
soon as possible at aqualified specialist
workshop.
X Have the tyre sealant bottle replaced every
four years at aqualified specialist work-
shop. i
In your vehicle, you will find asticker with
the Mercedes-Ben zService24h telephone
number, e.g. on the B-pillar on the driver's
side. Battery (vehicle)
Important safet
ynotes
Work on the battery, e.g. removin gorinstal-
ling, requires specialist knowledge and the
use of special tools. Therefore, alway shave
work on the batter ycarried out at aqualified
specialist workshop. G
WARNING
Work carried out incorrectly on the battery
can, for example, lead to ashort circuit and
damage your vehicle's electronic system. This
can disrupt driving safety systems such as
ABS (anti-lock brakin gsystem) or ESP ®
(Elec-
tronic Stabilit yProgram).
R If AB Smalfunctions, th ewheels can lock
during braking. This limits th esteerability
of th evehicl ewhen brakin gand th ebraking
distanc emay increase .There is arisk of
accident.
R If ESP ®
malfunctions, the vehicle will not be
stabilised if it starts to skid or awheel starts
to spin. There is arisk of accident.
You should therefore have all work involving
the battery carried out at aqualified specialist
workshop. G
WARNING
Comply with safety precautions and take pro-
tective measures when handling batteries. Risk of explosion
Fire, naked flames and
smoking are prohibited
when handling the battery.
Avoid creating sparks.316
Battery (vehicle)Breakdown assistance

Useful information
............................328
Importan tsafet ynotes .................... 328
Operation ........................................... 328
Winter operation ............................... 330
Tyr epressure .................................... 331
Changing awheel ............................. 336
Wheel and tyr ecombinations ..........341
Emergency spar ewheel ................... 351 327Wheels and tyres

Useful information
i This Owner's Manual describes all mod-
els, series and optional equipment for your
vehicle that were available at the time of
going to press. National variation sare pos-
sible. Not ethat your vehicle may not be
equipped with all of the function sdescri-
bed. This is also the case for system sand
function srelevan ttosafety.
i Read the information on qualified special-
ist workshops: (Y page 23). Important safet
ynotes G
WARNING
If wheels and tyres of the wrong size are used,
the wheel brakes or suspension components
may be damaged. There is arisk of accident.
Always replac ewheels and tyre swith those
that fulfil the specifications of the original part
(designation ,manufacturer, model). G
WARNING
Af lat tyre severely impairs the driving, steer-
ing and braking characteristics of the vehicle.
There is arisk of accident.
Tyres without run-flat characteristics:
R do not drive with aflat tyre.
R immediately replac ethe flat tyre with your
emergenc yspare wheel or spare wheel, or
consult aqualified specialist workshop.
Tyres with run-flat characteristics:
R pay attention to the information and warn-
ing notices on MOExtended tyre s(tyres
with run-flat characteristics).
Accessories that are not approved for your
vehicle by Mercedes-Ben zorare not being
usedc orrectly can impair the operating
safety. Before purchasing and using non-approved
accessories, visit aqualified specialist work-
shop and enquire about:
R suitability
R lega lstipulations
R factory recommendations
Information on the dimensions and types of
wheels and tyres for yourv ehicle can be
found under "Wheel/tyre combinations"
(Y page 341).
Information on air pressure for the tyres on
your vehicle can be found:
R on the tyre pressure label on the fuel filler
flap (Y page 157)
R under "Tyre pressure" (Y page 331)
R in the "Tyre pressure" section
Modification work on the brake system and
wheels is not permitted. The use of wheel
spacers or brake dust shields is not permit-
ted. This invalidates the general operating
permit for the vehicle.
i Further information on wheels and tyres
can be obtained at any qualified specialist
workshop. Operation
Information on driving
Check the tyre pressures when the vehicle is
heavily laden and, if necessary, adjust.
While driving, pay attention to vibrations,
noises and unusual handling characteristics,
e.g. pulling to one side. This may indicat ethat
the wheels or tyres are damaged. If you sus-
pect that atyre is defective, reduce your
speed immediately. Stop the vehicle as soon
as possible to chec kthe wheels and tyres for
damage. Hidden tyre damage could also be
causing the unusual handling characteristics.
If you find no signs of damage, have the tyres
and wheels checked at aqualified specialist
workshop.
When parking your vehicle, make sure that
the tyres do not get deformed by the kerb or 328
OperationWheels and tyres