steering MERCEDES-BENZ CLS COUPE 2012 Workshop Manual

Display messages Possible causes/consequences and
M Solutions
h
Tyr
ep ressure Cau‐ tio
nT yrem alfunc‐ tion The tyr
epressur einoneor mor etyres has dropped suddenly.
Aw arning tone also sounds.
G WARNING
If you driv ewithaf lat tyre, there is ariskoft he following hazards:
R Af lat tyre affects the ability to steer or brake the vehicle.
R You could lose control of the vehicle.
R Continued driving with aflat tyre will cause excessive heat build-
up and possibly afire.
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 If there is aflat tyre, inspect the tyres (Y page 312).h
Tyre pressure
Check tyre(s) The tyre pressure in one or more tyres has dropped significantly.
G WARNING
With tyre pressures which are too low, there is arisk of the fol-
lowing hazards:
R the tyres may burst, especiallyast he load and vehicle speed
increase.
R they 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 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. h
Please correct
tyre pressure The tyre pressure is too low in at least one of the tyres, or the tyre
pressure difference between the wheels is too great.
X
Check the tyre pressures at the next opportunity
(Y page 334).
X If necessary, correct the tyre pressure. Display messages
253On-board computer and displays Z

Display messages Possible causes/consequences and
M Solutions
&
inoperative See
Owner'
sManual The auxiliar
yheatin ghasatem porar ymalfunction or is faulty.
X Whe nthe vehicle is on alevel surface and the engin ehas cooled
down, make up to four attempts to switch on the auxiliary heat-
ing, waiting several minutes between each attempt
(Y page 132).
X If the auxiliary heating does not switch on, consult aqualified
specialist workshop. Ð
Power
steering mal‐
functio
nSee Own‐ er's Manual The power steering assistanc
eisfaulty.
Aw arning tone also sounds.
G WARNING
You will need to use mor eforce to steer.
Ther eisar iskofana ccident.
X Check whethe ryou are able to apply the extraf orce required.
X If you are able to steer safely: carefully drive on toaqualified
specialist workshop.
X If you are unable to steer safely: do not drive on. Contact the
nearest qualified specialist workshop. Telephone No
service Your vehicle is outside the network provider's transmitter/
receiver range.
X
Wait until the mobile phone operational readiness symbol
appears in the multifunction display. ¥
Top
up washer fluid The washer fluid level in the washer fluid reservoir has dropped
below the minimum.
X
Top up the washer fluid (Y page 299).Key
Display messages Possible causes/consequences and
M Solutions
Â
Key does not
belong to vehicle You have put the wrong key in the ignition lock.
X
Use the correc tkey. Â
Replace key The key needs to be replaced.
X
Visit aqualified specialist workshop. 256
Display messagesOn-board computer and displays

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

If it is permitted by law to operate communi-
cations equipment whilet
he vehicle is in
motion, you must only do so if the traffic sit-
uationp ermits.Otherwise, yo ucould be dis-
tracted fro mthe traffi cconditions ,cause an
accident and injure yourself and others.
Two-way radios and fa xequipment used with-
out low-reflection exterior aerials can inter-
fere with the vehicle's electronic sand thereby
jeopardise the operatin gsafety of the vehicle
and your safety. Therefore, you must only use
this equipment if it is correctly connected to
as eparate reflection-free exterior aerial. G
WARNING
Excessiv elevels of electromagnetic radiation
may cause damage to your health and the
health of others. Using an exterior aerial takes
int oa ccoun tcurren tscientific discussions
relatin gtothe possible health risk posed by
electromagnetic fields.
Mercedes-Benz recommends the use of an
approved exterior aerial. This ensures:
R optimal mobile phone reception quality in
the vehicle
R mutual influences between the vehicle
electronic sand mobile phones are mini-
mised
An exterior aerial has the following advan-
tages:
R it conducts the electromagnetic fields gen-
erated by awireless device to the exterior.
R the field strengt hinthe vehicle interior is
lower than in avehicle that does not have
an exterior aerial.
i There are various mobile phone brackets
that may be fitted in your vehicle; in some
cases, these are country-specific.
i You can connec taBluetooth ®
-capable
mobile phone with Audio 20, Audio 50 or
COMAND Onlin evia the Bluetooth ®
inter-
face. This also applies if your vehicle is
equipped with convenience telephony. More information on suitable mobile phones,
mobile phone brackets and on connecting
Bluetooth
®
-capable mobile phones with
Audio 20, Audio 50 or COMAND Onlin ecan
be obtained:
R at your Mercedes-Benz Service Centre
R on the Internet at http://www.mercedes-
benz.com/connect
i The function sand services available when
you use the phone depend on your mobile
phone model and servic eprovider.
Using amobile phone If th
emobile phon eisinserted in th emobile
phon ebracket ,you can speak to th eperson
you are callin gusingthe hands-free system.
X Open th etelephone compartment
(Y page 274).
X If required by th edesig noft he mobile
phone bracket, install the sliding adapter
(Y page 286).
X Insert the mobile phone into the mobile
phone bracket (see the separate installa-
tion instructions for the mobile phone fit-
ting).
i On some mobile phone brackets, you first
have to connect the mobile phone via Blue-
tooth ®
to the mobile phone bracket (see
the separate operating instructions for the
mobile phone bracket).
If this is the case, the mobile phone does
not have to be inserted into the bracket for
you to be able to use the telephone func-
tions. However, the charging function and
aerial function are not available.
Operating the mobile phone You can operate the telephone using the
6
and~ buttons on the multifunction
steering wheel. You can operate other mobile
phone functions via the on-board computer
(Y page 217).
When you remove the key from the ignition
lock, the mobile phone stays switched on. Features
285Stowing and features Z

X
Fold dow nthe camera cover by recess :.X
Use asoft cloth to clean the windscreen in
front of camera ;.
Cleaningt he plastic trim G
WARNING
When cleaning the steering wheel boss and
dashboard, do not use cockpit sprays or
cleaning agents containing solvents. Cleaning
agents containing solvents cause the surface
to become porous, and as aresult plastic
parts may break away and be thrown around
the interior when an airbag is deployed, which
may result in severe injuries.
! Do not affix the following to plastic surfa-
ces:
R stickers
R films
R scented oil bottles or similar items
You could otherwise damage the plastic.
! Do not allow cosmetics, insect repellent
or sunscreen to come in contact with the plastic trim
.This maintains the high-quality
look of the surfaces.
X Wipe the plastic trim with adamp, lint-free
cloth, e.g. amicrofibre cloth.
X Heavy soiling: use car care and cleaning
products recommended and approved by
Mercedes-Benz.
The surface may change colour tempora-
rily. Wait until the surface is dry again.
Cleaningt he steering wheel and gear or
selector lever X
Thoroughly wipe with adamp cloth or use
leather care agents that have been recom-
mended and approved by Mercedes-Benz.
Cleaningw ooden trim and trim ele-
ments !
Do not use solvent-based cleaning agents
such as tar remover, wheel cleaners, pol-
ishes or waxes. There is otherwise arisk of
damaging the surface.
X Wipe the wooden trim and trim elements
with adamp, lint-free cloth, e.g. amicrofi-
bre cloth.
X Heavy soiling: use car care and cleaning
products recommended and approved by
Mercedes-Benz.
Cleaningt he seat covers !
Observe the following when cleaning:
R clean genuine leather covers carefully
with adamp cloth and then wipe the cov-
ers down with adry cloth. Make sure that
the leather does not become soaked. It
may otherwise become rough and
cracked. Only use leather care agents
that have been tested and approved by
Mercedes-Benz. You can obtain these
from aqualified specialist workshop.
R clean artificial leather covers with acloth
moistened with asolution containing
1%d etergen t(e.g. washing-up liquid). 306
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

X
Slide cover :of positive terminal ;in the direction of the arrow.
X Connect positive terminal ;on your vehicl etopositive terminal =of dono rbattery B
using the jump lead .Always begin with positive terminal ;on your own vehicle first.
X Start the engine of the dono rvehicle and run it at idling speed.
X Connec tnegativ eterminal ?of donor battery Bto earth point Aof your vehicle using
the jump lead, connectingt he jump lead to donor battery Bfirst.
X Start the engine.
X Before disconnecting the jump leads, let the engines run for several minutes.
X First, remove the jump leads from earth point Aand negative terminal ?,then from pos-
itive terminal ;and positive terminal =,each time beginning at the contacts on your own
vehicle first.
X Close cover :of positive terminal ;after removing the jump leads.
X Have the battery checked at aqualified specialist workshop.
i Jump-starting is not considered to be anormal operating condition.
i Jump-starting cables and further information regarding jump startingc an be obtained at
any qualified specialist workshop. Towing and tow-starting
Important safety notes
G
WARNING
If you tow the vehicle, you must use arigid
towing bar if: R
the engine is not running.
R there is abrake system malfunction.
R there is amalfunction in the power supply
or the vehicle's electrical system.
The power assistance for the steering and the
brake force booster do not work when the
engine is not running. You will need more
force to steer and brake, you may have to
depress the brake pedal with maximum force. 320
Towing and tow-startingBreakdown assistance

particularly careful when removing the rear
cover. Example: towing eye covers
Towing eye cover
s(AMG vehicles)
The mountings for the removable towing eyes
are located in the bumpers. They are at the
fron tand at the rear, under the covers.
X Remove the towing eye from the vehicle
tool kit (Y page 311).
X Pull cover :out of the bumper in the
direction of the arrow by inserting your fin-
gers int othe recess. X
Press the mark on cover ;inwards in the
direction of the arrow.
X Take cover ;off the opening.
X Screw the towing eye in clockwise to the
stop and tighten it.
Removing the towing eye X
Loosen the towing eye and unscrew it.
X Position the top of cover :in the bumper
and press it in at the bottom until it
engages.
X Attach cover ;to the bumper and press
until it engages.
X Place the towing eye in the vehicle tool kit. Towing the vehicle with the rear axle
raised
! The ignition must be switched off if you
are towing the vehicle with the rear axle
raised. Intervention by ESP ®
could other-
wise damage the brake system.
Only possible on vehicles without
4MATIC.
X Switc hont he hazard warning lamps
(Y page 114).
X Turn the key in the ignition lock to position
0and remov ethe key from the ignition
lock.
X When leaving the vehicle, take the key or
the KEYLESS-GO key with you.
When towing your vehicle with the rear axle
raised, it is important that you observe the
safety instructions (Y page 320). Towing the vehicle with both axles on
the ground
G
WARNING
The power assistance for the steering and the
brake forc ebooster do not work when the
engin eisnot running. You will then need 322
Towing and tow-startingBreakdown assistance

much more effort to brake and steer the vehi-
cle. Adapt yours tyleofd rivingaccordingly.
It is important tha tyou observe the safety
instructions when towing away your vehicle
(Y page 320).
The automatic transmission automatically
shifts to position Pwhen you open the driver's
or front-passenger door or when you remove
the key from the ignition lock. In order to
ensure that the automatic transmission stays
in position Nwhen towing the vehicle, you
must observe the following points:
X Make sure that the vehicle is stationary and
that the key is in position 0in the ignition
lock.
X Turn the key to position 2in the ignition
lock.
On vehicles with KEYLESS-GO, use the key
instead of the Start/Stop button
(Y page 141).
X Depress and hold the brake pedal.
X Shift the automatic transmission to posi-
tion N.
X Release the brake pedal.
X Release the parking brake.
X Switch on the hazard warning lamps
(Y page 114).
X Leave the key in position 2in the ignition
lock.
i When towing with the hazard warning
lamps switched on, use the combination
switch as usual to signal achange of direc-
tion. In this case, only the turn signals for
the desired direction flash. When the com-
bination switch is reset, the hazard warning
lamps start flashing again. Transporting the vehicle
! Only lash the vehicle down by the wheels
or wheel rims, not by parts of the vehicle
such as axle or steering components. Oth-
erwise, the vehicle could be damaged. The towing eye can be used to pull the vehicle
onto atrailer or transporter for transporting
purposes.
X Turn the key to position 2in the ignition
lock.
X Shift the automatic transmission to posi-
tion N.
As soon as the vehicle is loaded:
X Prevent the vehicle from rolling away by
applying the parking brake.
X Shift the automatic transmission to posi-
tion P.
X Turn the key in the ignition lock to position
0and remove the key from the ignition
lock.
X Secure the vehicle. Notes for 4MATIC vehicles
! Vehicles with 4MATIC must not be towed
with the front or rear axle raised; otherwise,
the transmission may be damaged.
If the vehicle has transmission damage or
damage to the front or rear axle, have it trans-
ported on atransporter or trailer.
In the event of damage to the electrical
system
If the battery is defective, the automatic
transmission will be locked in position P.To
shift the automatic transmission to position
N,y ou must provide power to the vehicle's
electrical system in the same way as when
jump-starting (Y page 319).
Have the vehicle transported on atransporter
or trailer. Tow-starting (emergency engine
starting)
! Vehicles with automatic transmission
must not be tow-started. The transmission
may otherwise be damaged. Towing and tow-starting
323Breakdown assistance Z

Snow chains
G
WARNING
If you have fitted snow chains to the front
wheels, they may scrape against the vehicle
body or chassis components. This could
cause damage to the vehicle or the tyres.
There is arisk of an accident.
To avoid hazardous situations:
R never fit snow chains on the front wheels
R fit snow chains to the rear wheels in pairs.
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 that are of acorre-
sponding standard of quality.
If you intendtof it snow chains, please bear
the following points in mind:
R snow chains cannot be fitted to all wheel-
tyre combinations. Permissible wheel-tyre
combination s(Ypage 341).
R only use snow chains when the road sur-
face is completely snow-covered. Remove
the snow chains as soon as possible when
you come to aroad that is not snow-cov-
ered.
R local regulations may restrictt he use of
snow chains. Observe the appropriate reg-
ulations if you wish to fit snow chains.
R do not exceed the maximum permissible
speed of 50 km/h.
R on vehicles with AIRMATIC, you must drive
at raised vehicle level if snow chains have
been fitted (Y page 181).
i You may wish to deactivate ESP ®
when
pulling away with snow chains fitted
(Y page 66). This way you can allow the
wheels to spin in acontrolled manner, ach-
ieving an increased driving force (cutting
action).
For more information on driving with an emer-
gency spare wheel, see (Y page 351). Tyrep
ressure Tyrep
ressur especifications G
WARNING
Tyres with too low or too high tyre pressure
contain the following hazards:
R they can burst, in particular if the vehicle is
heavily laden or when driven at high
speeds.
R the tyres can wear excessively and/or
unevenly, which can severely impair tyre
traction.
R the driving, steering and braking character-
istics may be severely impaired.
There is arisk of accident.
Follow recommended tyre inflation pressures
and check the pressure of all the tyres includ-
ing the spare wheel:
R at least every two weeks
R if the load changes
R before beginning along journey
R for changed operating conditions, e.g. off-
road driving
If necessary, correct the tyre pressure. G
WARNING
If you fit unsuitable accessories onto tyre
valves, the tyre valves may be overloaded and
malfunction, which can cause tyre pressure
loss. Due to their design, retrofitted tyre pres-
sure monitors keep the tyre valve open. This
can also result in tyre pressure loss. There is
ar isk of accident.
Only screw standard valve caps or valve caps
specifically provided by Mercedes-Ben zfor
your vehicle onto the tyre valve. G
WARNING
If the tyre pressure drops repeatedly, the
wheel, valve or tyre may be damaged. Tyre
pressure that is too low may result in atyre
blow-out. There is arisk of accident. Tyrep
ressure
331Wheels and tyres
Z