keyless MERCEDES-BENZ E-CLASS CABRIOLET 2011 Owner's Manual

Display messages Possible causes/consequences and
M Solutions
The KEYLESS-GO ke
yisnot detecte dwhile the engin eisrunning
because ther eisinterference from astrong source of radio waves.
Aw arning tone also sounds.
X Pull ove rand stop the vehicl esafelyass oonasp ossible,p aying
attention to road and traffic conditions.
X Apply the parking brake.
X Operate the vehicle with the key in the ignition lock if necessary. +
Key not detected
(White displaym
es-
sage) The KEYLESS-GO key cannot be detected at present.
X
Change the location of the key with the KEYLESS-GO functions
in the vehicle.
If the KEYLESS-GO key is still not detected:
X Change the location of the key with the KEYLESS-GO functions
in the vehicle.
X Operate the vehicle with the key in the ignition lock if necessary. +
Key still in vehi‐
cle The KEYLESS-GO key has been detected inside the vehicle during
locking.
X
Remove the KEYLESS-GO key from the vehicle. +
Remove starting
button, then
insert key KEYLESS-GO is temporarily malfunctioning or is defective.
Awarn-
ing tone also sounds.
X Inser tthe keyintot he ignition loc kand tur nittot hedesired
position.
X Visi taq ualified specialist workshop. +
Close doors to
lock vehicle At least one door is open.
Awarning tone also sounds.
X Close all door sand loc kthe vehicle again. 254
Display messagesOn-board computer and displays

If you push the lidsb
ack, you willnotice a
resistance.
X Release bonnet :.
X Check whether the lidsofb onnet lifter;
are resting on housings =(arrow).
X The lids of bonnet lifter ; are resting
on the housings: close bonnet:
(Y page 282).
or
X The lids of bonnet lifter ; are not rest-
ing on the housings: first lift up bon-
net :on left-hand side ?and then on
right-hand side B.Lift up bonnet :until
the respective lid of bonnet lifter ;no lon-
ger moves.
The lidsofb onnet lifter;must rest on
housings =(arrow).
X Close bonnet :(Ypage 282).
If you cannot close bonnet :or the L
symbola ppears in the multifunction display,
repeatt he steps. G
WARNING
If the bonnet can still not be engaged properly
or the Lsymbol appears in the multifunc-
tion display,don ot continue driving. The bon-
net can then open when the vehicle is in
motion and obscure your field of vision. Con-
sult aqualified specialist workshop. Other-
wise, you may cause an accident and injure
yourself and others.
Opening the bonnet G
WARNING
Do not pull the release lever while the vehicle
is in motion. If you do so, the bonnet may open
up and block your view. G
WARNING
There is arisk of injury if the bonnet is open,
even if the engine is not running.
Some engine components can become very
hot. To avoid the risk of burns, only touch those
components described in the Owner's Manual
and observe the relevant safety notes.
G
WARNING
The radiator fan between the radiator and the
engine can start automatically, even if the key
has been removed from the ignition lock. For
this reason, you must not reach into the fan
rotation area. You could otherwise be injured.
Vehicles with apetrol engine: The elec-
tronic ignitio nsystem uses high voltage. For
this reason ,you mus tnever touch ignition
system components( ignition coil, ignition
cables, spark plug connectors or test socket)
while:
R the engine is running
R the engine is being started
R the ignition is switched on and the engine
is being cranked by hand
You could otherwise suffer an electric shock
and be seriously or even fatally injured.
Vehicles with adiesel engine: The elec-
tronic injection control uses high voltage. For
this reason ,you must never touc hinjection
system components while:
R the engin eisrunning
R the engin eisbeing started
R the ignition is switched on
You could otherwise suffer an electric shock
and be seriously or even fatally injured.
X Make sure that the windscreen wipers are
switched off. G
WARNING
The windscreen wipers and wiper linkage
could be set in motion.
When the bonnet is open, you or others could
be injured by the wiper linkage.
Make sure that the windscreen wipers are
switched off. Remove the key or make sure
that no ignition position has been selected
with KEYLESS-GO. All indicator lamps must be
off in the instrumen tpanel. Engine compartment
281Maintenance and care Z

X
Slowl yslide oi ldipstick :into the guide
tub etot he stop ,and take it ou tagain.
The oil level is correc tifthe level is between
MIN mark =and MAX mark ;.
X Top up the oil if necessary.
Adding engine oil H
Environmental note
When topping up the oil, take care not to spill
any. If oil enters the soil or waterways, it is
harmful to the environment. G
WARNING
If engine oil comes into contact with hot
engine parts, it may ignite and you could burn
yourself. Do not spill any engine oil on hot
engine parts. Example: engine oil cap
X
Turn cap :anti-clockwise and remove it.
X Top up with the amount of oil required.
Fill carefully to the maximum mark on the oil
dipstick.
i Depending on the engine, the difference
between the minimum mark and the maxi-
mum mark is approximately 1.5 –2litres.
! Do not add too much oil. If the oil level is
above the "max" mark on the dipstick, too
much oil has been added. This can lead to
damage to the engine or the catalytic con-
verter. Have excess oil siphoned off.
For further information on engine oil, see
(Y page 335). X
Replace cap :on the filler neck and
tighten clockwise.
Ensure that the cap locks into place
securely. Checking and adding other service
products
Checking the coolant level Only check the coolant level when the vehicle
is on alevel surface and the engine has cooled
down.
X Turn the key to position 2(Y page 147) in
the ignition lock.
On vehicles with KEYLESS-GO, press the
Start/Stop button twice (Y page 147).
X Check the coolant temperature displayin
the instrumentc luster. G
WARNING
The cooling system is pressurised. Therefore,
only unscrew the cap once the engine has
cooled down. The coolant temperature gauge
must display less than 70 †.Otherwise, you
could be scalded if hot coolant escapes. X
Slowl yturnc ap : half aturna nti-clock-
wise and allow exces spressure to escape.
X Turn cap :further anti-clockwis eand
remove it.
If th ecoolan tisatt heleve lofm arkerbar
= in th efille rneck when cold, there is
enough coolant in coolant expansion
tank ;. Engine compartment
283Maintenance and care Z

!
The following may cause the paint to
become shiny and thus reduce the matt
effect:
R Vigorous rubbing with unsuitablem ate-
rials.
R Frequent use of car washes.
R Washing the vehicle in direct sunlight.
! Never use paint cleaner, buffing or pol-
ishing products, or gloss preserver, e.g.
wax. These products are only suitablef or
high-gloss surfaces. Their use on vehicles
with matt finish leadstoc onsiderable sur-
face damage (shiny, spotted areas).
Alwaysh ave paintwork repairs performed
at aq ualified specialist workshop, e.g. a
Mercedes-Benz Service Centre.
! Do not use wash programs with ahot wax
treatment under any circumstances.
i The vehicle should preferably be washed
by hand using asoft sponge, car shampoo
and plenty of water.
i Use only insect remover and car shampoo
from the range of recommended and
approved Mercedes-Benz care products.
Cleaning the Cabriolets oft topX
Light soiling: you can clean th esoftt op
while it is dry or rinse it with clear water.
X Norma ltoheavy soiling: clean theroof
with abrush and clear water .Clean stains
and other dirt with abrush and aMercedes-
Ben zrecommended and approved cleaning
agent. Always brush from fron ttoback in
the direction of the fabric.
! Never use any of the following to clean the
soft top:
R petrol
R thinner
R tar or stain remover
R other organic solvents
! Remove bird droppings immediately as
they are corrosive and, therefore, can make the soft-top fabric leak. Do not use high-
pressure cleanin
gequipment to clean the
vehicle. Do not use sharp-edged equipment
to remove ice and snow.
Frequent cleanin greduces the resistance to
dirt of the soft top.
To restore this resistance to dirt, clean the
soft top using soft top cleanin gagents that
have been recommended and approved by
Mercedes-Benz.
Incorrec tcleanin gand care ,aswell as ageing,
can cause the soft top seams to leak. Have
the soft-top seams sealed at aqualified spe-
cialist workshop, e.g. at aMercedes-Benz
Servic eCentre.
i Cover the soft top with asuitable cover if
you plan to leave the vehicle outside for a
long period of time.
Cleaning AIRCAP Cleaning th
ewind deflector
Clean the wind deflector on the windscreen
with the soft top closed.
X Apply the parking brak efirmly.
X Vehicles with key: turnthe key to position
2 (Y page 147) in the ignition lock.
X Vehicles with KEYLESS-GO: press the
Start/Stop button twice (Y page 147).
X Open the cover in the lower centre console.
The AIRCAP button is under the cover. X
Press AIRCAP button :.
The wind deflector between the wind-
screen and the soft top is extended. 288
CareMaintenance and care

X
Clean net ;of th ewindd eflecto rwith a
soft brush or amoist cloth. For heavier soil-
ing, clean it with the care and cleaning
agent srecommende dand approved by
Mercedes-Ben zand rins eitwithc lean
water.
! Do not us ehigh-pressure cleaning equip-
ment to clean the net.
Cleanin gthe AIRCA Pdraught stop
Clea nthe AIRCAP draught stop with the soft
top open.
X Vehicles with key: turn the key to position
2 (Y page 147) in the ignition lock.
X Vehicles with KEYLESS-GO: press the
Start/Stop button twice (Y page 147).
X Open the soft top (Y page 86).X
Press rear seat head restraintsb utton:.
The rear seat head restraintsa nd AIRCAP
draught stop rise upwards. X
Cleann et; of the AIRCAP draught stop
with amoist clot htogether with the care
and cleanin gagents recommended and
approved by Mercedes-Benz.
Cleaning the windows G
WARNING
Switc hoff the windscreen wipers and remove
the key from the ignition lock before cleaning
the windscreen or the wiper blades. On vehi-
cles with KEYLESS-GO, press the Start/Stop
button repeatedly until all indicator lamps in
the instrument cluster have gone off. The
windscreen wipers could otherwise move and
injur eyou.
X Clean the inside and outside of the win-
dows with adamp cloth and acleaning
agent that is recommended and approved
by Mercedes-Benz.
! Do not use dry cloths, abrasive products,
solvent sorcleanin gagents containin gsol-
vent stoc lean the inside of the windows.
Do not touch the insides of the windows
with hard objects, e.g. an ice scraper or
ring. There is otherwise arisk of damaging
the windows.
! Clean the water drainage channels of the
windscreen and the rear window at regular
intervals. Deposit ssuch as leaves, petals
and pollen may under certain circumstan-
ces preven twate rfrom draining away.T his
can lead to corrosion damage and damage
to electronic components. Care
289Maintenance and care Z

Cleaning th
ewiper blades G
WARNING
Switch off th ewindscree nwipers and remove
the key fro mthe ignition lock before cleaning
the windscreen or the wiper blades. On vehi-
cles with KEYLESS-GO, press the Start/Stop
button repeatedly until all indicator lamps in
the instrument cluster have gone off. The
windscreen wipers could otherwise move and
injure you.
! Do not pull on the wiper blade. Otherwise,
the wiper blade could be damaged.
! Do not clean wiper blades too often and
do not rub them too hard. Otherwise, the
graphite coating could be damaged. This
could cause wiper noise.
X Fold the wiper arms away from the wind-
screen.
X Cleant he wiper blades carefully using a
damp cloth.
X Fold the windscreen wipers back again
before switching on the ignition.
! Hold the wiper arm securely when folding
back. The windscreen could be damaged if
the wiper arm hits against it suddenly.
Cleaningt he exterior lighting X
Cleant he plastic lenses of the exterior
lighting using awet sponge and amild
cleaning agent, e.g. Mercedes-Ben zcar
shampoo or cleanin gcloths.
! Only use cleanin gagents or cleaning
cloth sthata re suitable for plastic lenses.
Unsuitable cleanin gagents or cleaning
cloth scould scratch or damag ethe plastic
lenses of th eexteri or lighting. Cleaning th
esensors X
Clean sensors :of th edriving systems
wit hw ater, car shampoo and asoftc loth.
! If you clean the sensors with ahigh-pres-
sure cleaner, mak esure that you keep a
distanc eofatl east 30 cm between the
vehicle and the high-pressure cleaner noz-
zle. Information about the correc tdistance
is available fro mthe equipment manufac-
turer.
Cleaningt he reversing camera Example: Coupé
X
Use clear water and asoft cloth to clean
camera lens :.
! Do not clean the camera lens and the area
around the reversing camera with ahigh-
pressure cleaner. 290
CareMaintenance and care

R
Jack
R Centrin gpin
R On ep air of gloves
R Whee lwrench
R Towin geye "Minispare" emergency spare wheel
The "Minispare" emergency spar ewheel can
be foun dinthestowage well unde rthe boot
floor.
X Lift the boot floor upwards (Y page 268).X
Remove vehicle tool kit tray ;.
X Turn stowage well =anti-clockwise and
remove it.
X Remove "Minispare" emergency spare
wheel :.
For further information on changing awheel
and fittingt he spare wheel, see
(Y page 296). Flat tyre
Preparing the vehicle
Your vehicle may be equipped with:
R aT IREFIT kit
R an emergency spare wheel
R MOExtended tyres (tyres with run-flat char-
acteristics) (Y page 305)
i Vehicle preparation is not necessary on
vehicles with MOExtended tyres. i
Vehicles with MOExtended tyres are not
equipped with aTIREFIT kit at the factory.
It is therefore recommended that you addi-
tionally equip your vehicle with aTIREFIT kit
if you fit tyres that do not feature run-flat
properties, e.g. winter tyres. ATIREFIT kit
can be obtained from aMercedes-Benz
Service Centre.
X Stop the vehicle as far away as possible
from traffic on solid, non-slippery and level
ground.
X Switch on the hazard warning lamps.
X Firmly depress the parking brake.
X Bring the front wheels into the straight-
ahead position.
X Vehicles with manualt ransmission:
engage first or reverse gear.
X Vehicles with automatic transmission:
move the selector lever to P.
X Switch off the engine.
X Vehicles without KEYLESS-GO: remove
the key from the ignition lock.
X Vehicles with KEYLESS-GO: open the
driver's door.
The on-board electronicsh ave status0,
which is the same as the key having been
removed.
X Vehicles with KEYLESS-GO: remove the
Start/Stop button from the ignition lock
(Y page 147).
X All occupants must get out of the vehicle.
Make sure that they are not endangered as
they do so.
X Make sure that no one is near the danger
area whilst awheel is being changed. Any-
one who is not directly assisting in the
wheel change should, for example, stand
behind the barrier.
X Get out of the vehicle. Pay attention to traf-
fic conditionsw hen doing so.296
Flat tyreBreakdown assistance

may otherwise destroy electronic compo-
nents, such as the alternator.
i When you park the vehicle, remove the
key if you do not require any electrica lcon-
sumers .The vehicle will then use very little
energy, thus conserving battery power.
Mercedes-Ben zrecommends that you do not
carry out work on batteries yourself, e.g.
removin gorcharging. Have this work per-
formed at aqualified specialist workshop, e.g.
aM ercedes-Benz Service Centre. Installation location of the battery
Your vehicle is equipped with abatter yint he
engin ecompartment .Itislocated on the front
bulkhead under the filter box on the right-
hand side of the vehicle when viewed in the
direction of travel.
X Apply the parking brake firmly and on vehi-
cles with automatic transmission, shift the
transmission to position P.
X Switch off all electrical consumers (e.g.
radio, blower, etc.).
X Turn the key to position 0(Y page 147) in
the ignition lock and remove it, or, on vehi-
cles with KEYLESS-GO, make sure that the
ignition has been switched off
(Y page 147). All indicator lamps in the
instrument cluster must be off.
X Open the bonnet (Y page 281). X
Release clamps ;on filter box :using a
suitableo bject, such as ascrewdriver.
X Remove filter box :.
i Information on disconnecting the battery
(Y page 307). Disconnecting the battery
! Alwaysd isconnect the battery in
the order described below. Never swap the
terminal clamps. You may otherwise dam-
age the vehicle electronics.
In vehicles with automatic transmission,
the transmission is locked in position P
after disconnecting the battery. The vehicle
is secured against rolling away. You can
then no longer move the vehicle. :
Battery
; Positive terminal
= Negative terminal
? Breather hose
X Loosen the negative terminal clamp on the
battery and remove it.
X Remove the cover from the positive termi-
nal clamp.
X Loosen the positive terminal clamp on the
battery and remove it.
X Remove breather hose ?from the side of
the battery. Battery
307Breakdown assistance Z

R
the engine is not running.
R there is abrake syste mmalfunction.
R there is amalfunctio ninthe 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.
Before towing away,m ake sure that the steer-
ing can be moved and is not locked.
If you tow or tow-start another vehicle, its
weight must not exceed the maximum per-
missible gross vehicle weight of your vehicle. G
WARNING
The vehicle is braked when the HOLD function
or DISTRONIC PLUS is activated. Therefore,
deactivate HOLD and DISTRONIC PLUS if the
vehicle is to be towed.
It is better to have the vehicle transported
than to have it towed.
! You may tow the vehicle for amaximum
of 50 km. Atowing speed of 50 km/h must
not be exceeded.
For towing distances over 50 km, the entire
vehicle must be lifted up and transported.
! Only secure the tow rope or towing bar to
the towing eyes. The vehicle may otherwise
be damaged.
! Do not use the towing eye for recovery,
as this could damage the vehicle. If in
doubt, recover the vehicle with acrane.
! Pull away smoothly when towing away or
tow-starting avehicle. If the tractive power
is too high, the vehicles could be damaged.
! On vehicles with KEYLESS-GO, use the
key instead of the Start/Stop button. Turn
the key to position 2in the ignition lock and
shift the automatic transmission to N.
Then, turn the key back to 0and leave it in
the ignition lock. When towing
avehicle with an automatic
transmission, the transmission must be in
position N.
The battery must be connected and charged.
Otherwise, you:
R cannot turn the key in the ignition lock to
position 2
R cannot shift the transmission to position
N on vehicles with automatic transmission
Vehicles with automatic transmission:
release the selector lever lock manually to
move it out of position P(Y page 160).
i Before the vehicle is towed, switch off the
automatic locking feature (Y page 78). You
could otherwise be locked out when push-
ing or towing the vehicle.
Deactivate tow-away protection
(Y page 68) before the vehicle is towed. Fitting/removing the towing eye
Fitting the towing eye Vehicles with
atrailer tow hitch: if you intend
to use the vehicle for towing, fold out the ball
coupling and connect the towbar to it
(Y page 206).
X Remove the towing eye from the vehicle
tool kit (Y page 295). G
WARNING
The exhaust tail pipe may be hot. You could
burn yourself if you touch the tail pipe. Be
particularly careful when removing the rear
cover.
The mountings for the removable towing eyes
are located in the bumpers. They are at the
front and at the rear, under the covers. Towing and tow-starting
311Breakdown assistance Z

Example: Cabriolet
X
Press the mark on cover :inwards in the
direction of the arrow.
X Take cover :off the opening.
X Screw the towing ey einclockwise to the
stop and tighten it.
Removing the towin geye X
Loosen the towing ey eand unscrew it.
X Attach cover :to the bumpe rand press
unti lite ngages.
X Place the towing ey einthe vehicl etool kit. Towin
gthe vehicle with the rear axle
raised
Whe ntowing your vehicle with the rear axle
raised, it is important that you observe the
safety instructions (Y page 310).
! 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. X
Switch on the hazard warning lamps
(Y page 117).
X Turn the key in the ignition lock to position
0and remove the key from the ignition
lock.
X When leaving the vehicle, take the key or
the KEYLESS-GO key with you. Towing the vehicle with both axles on
the ground
It is important that you observe the safety
instructions when towing away your vehicle
(Y page 310). G
WARNING
The power assistance for the steering and the
brake force booster do not work when the
engine is not running. You will then need
much more effort to brake and steer the vehi-
cle. Adapt your style of driving accordingly.
X Switch on the hazard warning lamps
(Y page 117).
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.
X Turn the key to position 2in the ignition
lock.
X When the vehicle is stationary, depress the
brake pedal and keep it depressed.
X Vehicles with manualt ransmission:
depress the clutch pedal.
X Shift to neutral.
or
X Vehicles with automatic transmission:
shift the automatic transmission to posi-
tion N.
X Release the brake pedal.
X Release the parking brake. 312
Towing and tow-startingBreakdown assistance