key MERCEDES-BENZ C-CLASS COUPE 2015 Owner's Manual

Removin
gthe emergenc ykey element X
Push release catch :in the direction of the
arrow and ,atthe same time ,remove emer-
gency key element ;from the key.
Further information:
R Unlocking the driver' sdoor(Ypage 88)
R Locking the vehicl e(Ypage 88)
Inserting the emergenc ykey element X
Push emergency key element ;completely
into the key unti litengages and release
catch :is back in its basic position. Battery of the key
Important safety notes G
WARNING
Batterie scontain toxic and corrosiv esubstan-
ces. If batteries are swallowed, it can resul tin
severe health problems .There is ariskoff atal
injury.
Kee pbatteries ou tofthe reach of children. If
ab attery is swallowed, see kmedica lattention
immediately. H
Environmental note Batterie
scontain pollutants.
It is illega ltodispose of them
with the househol drubbish.
The ym ustb ec ollected sep-
arately and disposed of in an environmentally responsible
recycling system.
Dispose of batteries in an
environmentally responsible
manner. Take discharged
batteries to
aquali fied spe-
cialist worksho portoacol-
lection point for used batter-
ies.
Mercedes-Benz recommend sthat yo uhavet he
batteries replaced at aquali fied specialist work-
shop.
Checking the battery X
Press the &or% button.
The battery is working properly if battery
check lamp :lights up briefly.
The battery is discharge difbattery check
lamp :doe snot light up briefly.
X Replace the battery (Y page 83).
If the key battery is checke dwithin the signal
reception rang eofthe vehicle, pressing the
& or% button:
R locks or
R unlocks the vehicle
i Yo
uc an obtain abattery from any qualified
specialist workshop.
Replacing the battery Yo
ur equire aCR20253Vc ellb attery.
X Take the emergency key element ou tofthe
key (Y page 83). Key
83Opening and closing Z

X
Press emergenc ykey element ;into the
opening in the key in the direction of the arrow
until battery compartment cover :opens.
When doing so, do not hold battery compart-
ment cover :shut.
X Remove battery compartment cover :.X
Repeatedly tap the key against your palm until
battery =falls out.
X Insert the new battery with the positive ter-
minal facing upwards. Use alint-free cloth to
do so.
X Make sure that the surface of the battery is
free of lint, grease and other contamination.
X Insert the frontt abs of battery compartment
cover :into the housing and then press to
close it.
X Insert emergenc ykey element ;into the key
(Y page 83).
X Check the function of all key button sonthe
vehicle. 84
KeyOpening and closing

Problems with the key
Problem
Possible causes/consequences and
M
MSolutions You can no longer lock or
unlock the vehicle using
the key. The key battery is discharged or nearly discharged.
X Check the key battery (Y page 83) and replace if necessary
(Y page 83).
If this does not work: X Unlock (Y page 88) or lock (Y page 88) the vehicle using the
emergency key element. There is interference from
apowerful source of radio waves.
X Unlock (Y page 88) or lock (Y page 88) the vehicle using the
emergency key element. The key is faulty.
X Unlock (Y page 88) or lock (Y page 88) the vehicle using the
emergency key element.
X Have the key checked at aqualified specialist workshop. You can no longer lock or
unlock the vehicle using
KEYLESS-GO. KEYLESS-GO was deactivated.
X Reactivate KEYLESS-GO (Y page 81). The key battery is discharged or nearly discharged.
X Check the key battery (Y page 83) and replace if necessary
(Y page 83).
If this does not work: X Unlock (Y page 88) or lock (Y page 88) the vehicle using the
emergency key element. There is interference from
apowerful source of radio waves.
X Unlock (Y page 88) or lock (Y page 88) the vehicle using the
emergency key element. There is
afault with KEYLESS-GO.
X Lock/unlock the vehicle using the remote control function of the
key.
X Have the vehicle and key checked at aqualified specialist work-
shop.
If the vehicle can also not be locked/unlocked using the remote con-
trol function:
X Unlock (Y page 88) or lock (Y page 88) the vehicle using the
emergency key element.
X Have the vehicle and key checked at aqualified specialist work-
shop. Key
85Opening and closing Z

Problem
Possible causes/consequences and
M
MSolutions The engine cannot be
started using the key. The on-board voltage is too low.
X Switch off non-essential consumers, e.g. seat heating or interior
lighting, and try to start the engine again.
If this does not work:
X Check the starter battery and charge it if necessary (Y page 343).
or X Jump-start the vehicle (Y page 345).
or X Consult aqualified specialist workshop. The engine cannot be
started using the Start/
Stop button. The key is in
the vehicle. The vehicle is locked.
X Unlock the vehicle and try to start the vehicle again. The key battery is discharged or nearly discharged.
X Check the key battery (Y page 83) and replace if necessary
(Y page 83).
If this does not work: X Start your vehicle with the key in the ignition lock. There is interference from
apowerful source of radio waves.
X Start your vehicle with the key in the ignition lock. You have lost
akey. X
Have the key deactivated at aqualified specialist workshop.
X Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. You have lost the emer-
gency key element. X
Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. Doors
Important safety notes
United Kingdom only: G
WARNING
When the double locks are activated, the
doors can no longer be opened from the
inside. People in the vehicle can no longer get out, e.g. in hazardous situations. There is a
risk of injury.
Therefore, do not leave any people unsuper-
vised in the vehicle, particularly children, eld-
erly people or people in need of special assis-
tance. Do not activate the double lock when
people are in the vehicle. If the vehicle has been locked from the outside,
the double lock function is activated as stand-
ard. It is then not possible to open the doors
from inside the vehicle. You can deactivate the
double lock function by deactivating the interior
motion sensor (see the separate multimedia
system operating instructions). The doors can
then be opened from the inside after the vehicle
has been locked from the outside. The anti-theft alarm system is triggered if the door is opened
from the inside. Switch off the alarm
(Y page 78).
All countries: 86
DoorsOpening and closing

G
WARNING
If children are left unsupervised in the vehicle, they could:
R open doors, thereby endangering other per-
sons or road users
R get out and be struck by oncoming traffic
R operate vehicl eequipment and become
trapped, for example
In addition, the children coul dalsos et the
vehicl einm otion, for example, if they:
R release the parking brake
R shift the automatic transmission out of park
position Porshift manua ltransmission into
neutral
R start the engine
There is arisk of an accident and injury.
When leaving the vehicle, alwayst ake the key
with you and lock the vehicle. Never leave
children and animals unattended in the vehi-
cle. Keep the keys out of the reach of children. Unlocking and opening the doors
from the inside
Unite dKingdom only: if the vehiclehas been
locked with the key or with KEYLESS-GO, the
double lock function is activated as standard. It is then not possible to open the doors from
insid ethe vehicle. You can deactivate the dou-
ble lock function by deactivating the interior
motion sensor (see the Digita lOwner's Manual).
The doors can then be opened from the inside
after the vehicl ehas been locked from the out-
side .The anti-theft alarm system is triggere dif
the door is opened from the inside. Switch off
the alarm (Y page78).
For all countries except the Unite dKingdom:
You can open adoor from insid ethe vehicle
even if it has been locked. If the vehicl ehas pre-
viously been locked with the key or with KEY-
LESS-GO, opening adoor from the insid ewill
trigger the anti-theft alarm system. Switch off
the alarm (Y page78). X
Pulld oor handle ;.
If the door is locked, locking knob :pops up.
The door is unlocked and opens. Centrally locking and unlockin
gthe
vehicle from the inside
You can centrally lock and unlock the vehicle
from the inside. The switches are on the driver's door. X
To unlock: press button :.
X To lock: press button ;.
When the front-passenge rdoor is closed ,the
vehicl eislocked.
This does not lock or unlock the fuel filler flap.
You cannot unlock the vehicl ecentrally from the
insid eifthe vehicl ehas been locked with the key
or KEYLESS-GO.
For all countries except the Unite dKingdom:
The doors can be opened from the inside.
If the vehicl ehas previousl ybeen locked with
the key or with KEYLESS-GO, opening adoor
from the insid ewillt rigger the anti-theft alarm
system. Switch off the alarm (Y page78).
Unite dKingdom only: if the vehiclehas been
locked with the key or with KEYLESS-GO, the Doors
87Opening and closing Z

double lock function is activated as standard. It
is then not possible to open the doors from
inside the vehicle. You can deactivate the dou-
ble lock function by deactivating the interior
motion sensor (see the Digital Owner' sManual).
Opening/closing doors is then possible as fol-
lows: the doors can be opened from inside.
When alocked door is opened from inside the
vehicle, the previous unlocking proces swill be
acknowledged if the vehicle:
R has been locked with the locking butto nfor
the central locking or
R has been locked automatically
The vehicle will be fully unlocked if it had previ-
ously been fully unlocked. Only the door which
has been opened from the inside is unlocked if
only the driver' sdoor had been previously
unlocked. Automatic locking feature
X
To deactivate: press and hold button :for
approximately five seconds until atone
sounds.
X To activate: press and hold button ;for
approximately five seconds until atone
sounds.
If you press one of the two buttons and do not
hear atone, the relevant setting has already
been selected.
The vehicle is locked automatically when the
ignition is switched on and the wheels are turn-
ing.
Therefore, you could be locked out if:
R the vehicle is being pushed
R the vehicle is being towed
R the vehicle is being tested on adynamometer i
You can activate and deactivate the auto-
matic locking mechanism via the multimedia
system (see the Digital Owner' sManual). Unlocking/locking the driver's door
using the emergency key element
i If you want to centrally lock the vehicle using
the emergency key element ,begin by press-
ing the locking butto nfor the interior locking
mechanism while the driver' sdoor is open.
Then lock the driver' sdoor using the emer-
genc ykey element. X
Inser tthe emergency key element int oopen-
ing :in the protective cap.
X Pull and hold the door handle.
X Pull the protective cap on the emergency key
as straight as possible away from the vehicle until it releases.
X Release the door handle. X
To unlock: turn the emergency key element
anti-clockwise as far as it will go to position
1.
X To lock: turn the emergency key element
clockwise as far as it will go to position 1.88
DoorsOpening and closing

Right-hand-drive vehicle:
turn the emergency
key element in the opposite direction in both
cases.
If yo uusethe emergency key element to unlock
and ope nthe driver' sdoor, the anti-theft alarm
system will be triggered. Switch off the alarm
(Y page 78). Boot
Important safety notes
G
WARNING
Combustio nengines emi tpoisonous exhaust
gases such as carbon monoxide. Exhaust
gases can enter the vehicle interior if the boot
li diso penw hent he engine is running, espe-
ciall yift he vehicle is in motion. There is arisk
of poisoning.
Alway sswitch off the engine before opening
the boo tlid.N eve rdrive with the boo tlid
open. G
WARNING
If objects, luggage or loads are not secured or not secured sufficiently ,they could slip, tip
over or be flung around and thereby hit vehicle
occupants. There is ariskofi njury, especially
whe nbraking or abruptly changing directions.
Alway sstore objects so that they cannot be
flung around .Secure objects, luggage or
loads against slipping or tipping before the
journey.
! The boo
tlid swings upwards whe nopened.
Therefore, make sure that there is sufficient
clearance above the boo tlid.
The opening dimensions of the boo tlid can be
found in the "Vehicl edata" section
(Y page 377).
You can limit the opening angl eofthe boo tlid in
the multimedi asystem (se ethe Digital Owner's
Manual).
Do not leave the key in the boot. You could oth- erwise lock yoursel fout.
Stow luggage or loads preferabl yinthe boot.
Observe the loading guidelines (Y page 308). Obstacl
edetection with boot lid
reversin gfeature
Vehicles with boot li dremote closing fea-
ture:
The boo tlid is equipped with automatic obstacle
detection with reversing feature .Ifasolid object
blocks or restricts the boo tlid whe nautomati-
cally opening, this procedure is stopped .Ifa
solid object blocks or restricts the boo tlid when
automaticall yclosing, the boo tlid opens again
automatically. The automatic obstacl erecogni-
tion with reversing function is only an aid. It is
not asubstitute for your attentivenes swhen
opening and closing the boo tlid. G
WARNING
The reversing function doe snot react:
R to soft, light and thin objects, e.g. fingers
R over the last 8mmofthe closing path
The reversing feature cannot prevent some-
one being trapped in these situations in par-
ticular. There is ariskofi njury.
Whe nclosing make sure that no bod yparts
are in the closing area.
If someone is trapped:
R press the Fbutton on the key or
R pull or press the remote operating switch
on the driver' sdooror
R press the closing or locking button on the
boo tlid.
Vehicles with HANDS-FREE ACCESS:
It is also possible to stop the closing process by performing akicking movement under the rear
bumper. Opening and closin
gmanually
Opening X
Press the Fbutton on the key.
The boo tlid opens. Boot
89Opening and closing Z

Closing
X
Pull th eboot lid down usin grecess :and
push it closed.
X Loc kthe vehicle if necessary wit hthe &
butto nont hekeyorw ithK EYLESS-GO
(Y page 81). Opening/closing automatically from
th eo utside
Important safety notes G
WARNING
Part soft hebody coul dbecome trapped dur-
ing automatic closin goftheboot lid. More-
over, people, e.g .children, may be standing in
th ec losin garea or may ente rthe closin garea
durin gthe closin gprocess. Ther eisariskof
injury.
Mak esure that nobody is in th evicinity of the
closin garea durin gthe closin gprocess.
Use on eofthefollowin goption stos topt he
closin gprocess:
R pres sthe F buttonont hekey.
R pull or pres sthe remot eoperatin gswitch
on th edriver' sdoor.
R pres sthe closin gorlockin gbutto nont he
boot lid. G
WARNING
Combustion engines emit poisonous exhaust
gases suc hascarbon monoxide. Exhaust
gases can ente rthe vehicle interio riftheboot
lid is open when th eengineisr unning, espe- ciall
yift hevehicle is in motion .Ther eisar isk
of poisoning.
Always switch off th eengineb efore opening
th eb oot lid. Never driv ewitht he boot lid
open.
Vehicles with HANDS-FREE ACCESS:
It is also possible to stop th eclosin gproces sby
performing akickin gmovement unde rthe rear
bumper.
! The boot lid swings upward
swhen opened.
Therefore, mak esure that there is sufficient
clearance abov ethe boot lid.
The opening dimension softheboot lid can be
foun dint he"Vehicle data" section
(Y page 377).
Opening automatically You can open th
eboot lid automaticall yusing
th ek ey.
X Press and hold the Fbuttonont hekey
until th eboot lid opens.
Closing automatically :
Closin gbutton
; Lockin gbutton
X Press closin gbutton :in th eboot lid.
Vehicles with boot lid remote closing fea-
ture and KEYLESS-GO: when thedriver' sdoor
is closed you can simultaneousl yclose th eboot
lid and loc kthe vehicle .The KEYLESS-GO key
must be in th erear detection range of th evehi-
cle.
X Press lockin gbutton ;in th eboot lid.
If KEYLESS-GO detect sakeyoutside th evehi-
cle ,the boot lid closes .The vehicle is locked. 90
BootOpening and closing

If KEYLESS-GO detects
akey in the boot, the
boot lid opens again after it is closed.
If KEYLESS-GO detects asecond key outsid ethe
vehicle ,the boot lid remains closed.
If KEYLESS-GO detects akey in the boot before
the closing procedure starts, the boot lid
remains open. HANDS-FREE ACCESS
Important safety notes G
WARNING
The vehicle exhaust system can become very
hot. If you use HANDS-FREE ACCESS, you
could burn yourself by touching the exhaust
system. There is arisk of injury. Always
ensure that you only make aleg movement
within the detection range of sensors.
! If the key is within the rear detection range
of KEYLESS-GO, the following situations, for
example ,could leadtot he boot lid opening
unintentionally:
R using acar wash
R using ahigh-pressure cleaner
Make sure that the key is at least 3maway
from the vehicle.
General notes With KEYLESS-GO and HANDS-FREE ACCESS,
you can open or close the boot lid or stop the
procedure withou
tusing yourh ands. This is use-
ful if you have yourh ands full.Todothis, make
ak icking movement under the bumperw ith your
foot.
Observe the following points:
R Carry yourK EYLESS-GO key abouty ourp er-
son. The KEYLESS-GO key must be in the rear detection range of the vehicle.
R When making the kicking movement, make
sure that you are standing firmly on the
ground and that there is sufficient clearance
to the rear of the vehicle .You could otherwise
lose yourb alance, e.g. on ice. R
Alwayse nsure that you only make akicking
movement within the detection range of sen- sors :.
R Stand at least 30 cm awayf rom the rear area
whiled oing so.
R Do not come into contact with the bumper
whilem aking the kicking movement. Other-
wise,t he sensors may not function correctly.
R HANDS-FREE ACCESS does not function
when the engine is started.
R Dirt causedbyr oad salt around sensors :
may restrict functionality.
Using HANDS-FREE ACCESS with apros-
thetic leg may restrict functionality.
R IfaK EYLESS-GO key is within the rear detec-
tion range of KEYLESS-GO, HANDS-FREE
ACCESS could be triggered. The boot lid could
thus be opened or closed unintentionally ,for
example ,ifyou:
- fold the ballc oupling in or out
- coupleoru ncoupleatrailer
- fit or remove arear-mounted bicycl erack
- load/unload bicycles on/from arear-
mounted bicycl erack
- sit on the edge of the boot
- set down or lift up an object behind the
vehicle
- polish the rear of the vehicle
Do not carry the KEYLESS-GO key abouty our
person in such situations. This willp revent the
unintentional opening/closing of the boot. Boot
91Opening and closing Z

Operation
X
To open/close: kick into sensor detection
range :under the bumper with your foot.
Aw arning tonew ill sound while the boot lid is
opening or closing.
X If the boot lid does not open/close after
several attempts: wait at least ten seconds
then kick under the bumper oncea gain.
If you hold your foot under the bumper for too
long, the boot lid does not open or close. Repeat
the kicking movemen tmore quickly if this
occurs.
To stop the opening or closing procedure:
R move your foot in sensor detection range :
under the bumper, or
R press the closing button on the boot lid, or
R press the Fbutton on the key
If the boot lid closing procedure has been stop-
ped:
R move your foot under the bumper again and
the boot lid will open
If the boot lid opening procedure has been stop-
ped:
R move your foot under the bumper again and
the boot lid will close Opening and closing automatically
from the inside
Important safet ynotes G
WARNING
Combustion engine semit poisonous exhaust
gases such as carbon monoxide. Exhaust
gases can enter the vehicle interior if the boot
lid is open when the engine is running, espe- cially if the vehicle is in motion
.There is arisk
of poisoning.
Always switch off the engin ebefore opening
the boot lid. Never drive with the boot lid
open. G
WARNING
The reversing function does not react:
R to soft ,light and thin objects, e.g. fingers
R over the last 8mmofthe closing path
The reversing feature cannot preven tsome-
one being trapped in these situation sinpar-
ticular. There is arisk of injury.
When closing make sure that no body parts
are in the closing area.
If someon eistrapped:
R press the Fbutton on the key or
R pull or press the remot eoperatin gswitch
on the driver's door or
R press the closing or lockin gbutton on the
boot lid.
Vehicles with HANDS-FREE ACCESS:
It is also possible to stop the closing process by performing akicking movemen tunder the rear
bumper.
! The boot lid swings upwards when opened.
Therefore, make sure that there is sufficient
clearanc eabove the boot lid.
The opening dimension softhe boot lid can be
found in the "Vehicle data" section
(Y page 377).
Opening and closing 92
BootOpening and closing