2017 MERCEDES-BENZ C-Class COUPE keyless

Problems with the SmartKey
ProblemPossible causes/consequences andMSolutions
You can no longer lock or
unlock the vehicle using
the SmartKey.The SmartKey battery is discharged or nearly discharged.
XCheck the SmartKey battery (Ypage 77) and replace it if necessary
(Ypage 77).
If this does not work:
XUnlock (Ypage 82) or lock (Ypage 82) the vehicle using the
mechanical key.
There is interference from apowerful source of radio waves.
XUnlock (Ypage 82) or lock (Ypage 82) the vehicle using the
mechanical key.
The SmartKey is faulty.
XUnlock (Ypage 82) or lock (Ypage 82) the vehicle using the
mechanical key.
XHave the SmartKey checked at aqualified specialist workshop.
You can no longer lock or
unlock the vehicle using
KEYLESS-GO.KEYLESS-GO was deactivated.
XReactivate KEYLESS-GO (Ypage 75).
The SmartKey battery is discharged or nearly discharged.
XCheck the SmartKey battery (Ypage 77) and replace it if necessary
(Ypage 77).
If this does not work:
XUnlock (Ypage 82) or lock (Ypage 82) the vehicle using the
mechanical key.
There is interference from apowerful source of radio waves.
XUnlock (Ypage 82) or lock (Ypage 82) the vehicle using the
mechanical key.
KEYLESS-GO is malfunctioning.
XLock/unlock the vehicle using the remote control function of the
SmartKey.
XHave the vehicle and SmartKey checked at aqualified specialist
workshop.
If the vehicle can also not be locked/unlocked using the remote con-
trol function:
XUnlock (Ypage 82) or lock (Ypage 82) the vehicle using the
mechanical key.
XHave the vehicle and SmartKey checked at aqualified specialist
workshop.
SmartKey79
Opening and closing
Z

Unlocking and opening doors from
the inside
You can openadoor from inside the vehicle
even if it has been locked. If the vehicle has been
locked with the SmartKey or with KEYLESS-GO,
openin gadoor from the inside will trigger the
anti-theft alarm system .Switc hoff the alarm
(
Ypage 73).
XPull door handle ;.
If the door is locked, locking knob :pops up.
The door is unlocked and opens.
Centrally locking and unlocking the
vehicle from the inside
You can centrally lock and unlock the vehicle
from the inside. The switches are on the driver’s
door.
XTo unlock: press button :.
XTo lock:press button ;.
When the front-passenge rdoor is closed, the
vehicle is locked.
Meanwhile, the fuel filler flap will not be locked
or unlocked. You cannot unlock the vehicle centrally from the
inside if the vehicle has been locked with the
SmartKey or KEYLESS-GO.
The doors can be opened from the inside.
If the vehicle has been locked with the SmartKey
or with KEYLESS-GO, openin gadoor from the
inside will trigger the anti-theft alarm system.
Switc hoff the alarm (
Ypage 73).
When alocked door is opened from inside the
vehicle, the previous unlocking process will be
acknowledged if the vehicle:
Rhas been locked with the locking button for
the central locking or
Rhas been locked automatically
The vehicle will be fully unlocked if it had previ-
ously been fully unlocked. If only the driver's
door had been previously unlocked, only the
door which has been opened from the inside is
unlocked.
Automatic locking feature
XTo deactivate: press and hold button :for
approximately five seconds until atone
sounds.
XTo 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 relevants etting has already
been selected.
The vehicle is locked automatically when the
ignition is switched on and the wheels are turn-
ing.
You could therefore be locked out if:
Rthe vehicle is being pushed.
Rthe vehicle is being towed.
Rthe vehicle is on aroller dynamometer.
Doors81
Opening and closing
Z

Obstacle detection with reversing
feature for the trunk lid
Vehicles with trunk lid remoteclosing fea-
ture:
The trun klid is equipped with automatic obsta-
cle detection with areversingf eature. Ifasolid
objec tblocks or restrictst he trunklid when
automatically opening ,this procedure is stop-
ped. If asolid objec tblocks or restrictst he trunk
lid when automatically closing, the trun klid
opens again automatically. The automatic
obstacle detection with reversingf eature is only
an aid. It is not asubstitute for your attentive-
ness when opening and closing the trun klid.
GWARNING
The reversingf eature does not respond:
Rto soft,light and thin objects, e.g. fingers
Rover the last 1/3 in (8 mm) of the closing
movement
The reversingf eature cannot prevents ome-
one being trapped in these situation sinpar-
ticular. There is arisk of injury.
Make sure that no body parts are in close
proximit yduring the closing procedure.
If somebody becomes trapped:
Rpress the Fbutton on the SmartKey, or
Rpull or press the remoteo peratingswitch
on the driver's door or
Rpress the closing or lockin gbutton on the
trun klid
Vehicles with HANDS-FREE ACCESS:
It is also possible to stop the closing process by
performing akicking movementu nder the rear
bumper.
Opening and closing manually
Opening
XPress the Fbutton on the SmartKey.
The trun klid opens.
Closing
XPull the trun klid down using recess :and
push it closed.
XLock the vehicle if necessary with the &
button on the SmartKey or with KEYLESS-GO
(
Ypage 75).
Opening/closing automatically from
outside
Important safetyn otes
GWARNING
Parts of the body could become trapped dur-
ing automatic closing of the trun klid. More-
over, people, e.g. children,m ay be standing in
the closing area or may enter the closing area
during the closing process.T here isarisk of
injury.
Make sure that nobody is in the vicinity of the
closing area during the closing process.
Use one of the following option stostop the
closing process:
Rpress the Fbutton on the SmartKey.
Rpull or press the remoteo peratingswitch
on the driver's door.
Rpress the closing or lockin gbutton on the
trun klid.
GWARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Exhaust
gases can enter the vehicle interior if the
trun klid is open when the engin eisrunning,
Trunk83
Opening and closing
Z

especially if the vehicle is in motion.There is a
risk of poisoning.
Always switch off the engine before opening
the trun klid. Never drive with the trun klid
open.
Vehicles with HANDS-FREE ACCESS:
It is also possible to stop the closing process by
performing akicking movementu nder the rear
bumper.
!The trun klid swings upwards when opened.
Therefore, make sure that there is sufficient
clearanc eabove the trun klid.
The opening dimension softhe trun klid can be
found in the "Vehicle data" section
(
Ypage 349).
Opening automatically
You can open the trun klid automatically using
the SmartKey.
XPress and hold the Fbutton on the Smart-
Key until the trun klid opens.
Closing automatically
:Closing button
;Locking button
XPress closing button :in the trun klid. Vehicles with trunk lid remot
eclosing fea-
tur eand KEYLESS-GO: when the driver's door
is closed you can simultaneously close the trunk
lid and lock the vehicle. The KEYLESS-GO key
must be in the rear detection range of the vehi-
cle.
XPress lockin gbutton ;in the trun klid.
If KEYLESS-GO detect saSmartKey outside
the vehicle, the trun klid closes. The vehicle is
locked.
If KEYLESS-GO detect saSmartKey in the trunk,
the trun klid opens again after it is closed.
If KEYLESS-GO detect sasecondS martKey out-
side the vehicle, the trun klid remains closed.
If KEYLESS-GO detect saSmartKey in the trunk
before the closing procedure starts, the trun klid
remains open.
HANDS-FREE ACCESS
Important safety notes
GWARNING
The vehicle's exhaust system may be very hot. You could burn yourself by touchin gthe
exhaust system if you use HANDS-FREE
ACCESS. There is arisk of injury. Always
ensure that you only make the kicking move-
ment within the detection range of sensors.
!If the SmartKey is within the rear detection
range of KEYLESS-GO, the following situa-
tions, for example, could lead to the uninten-
tional opening of the trunk:
Rusing acar wash
Rusing apower washer
Make sure that the SmartKey is at least 10 ft
(3 m) away from the vehicle.
General notes
With KEYLESS-GO and HANDS-FRE EACCESS,
you can open or close the trun klid or stop the
procedure without using your hands. This is use- ful if you have your hands full. To do this, make
ak icking movementu nder the bumper with your
foot.
84Trunk
Opening and closing

Observe the following points:
RCarry your KEYLESS-GO key aboutyour per-
son. The KEYLESS-GO key must be in the rear
detection range of the vehicle.
RWhen 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 your balance e.g. on ice.
RAlwayse nsure that you only make the kicking
movement within the detection range of sen-
sors :.
RStand at least 12 in (30 cm) awayf rom the
rear area while doing so.
RDo not come into contact with the bumper
while making the kicking movement. Other-
wise, the sensors may not function correctly.
RHANDS-FREE ACCESS does not function
when the engine is started.
RDirt caused by road salt around sensors :
may restrict functionality.
Using the HANDS-FREE ACCESS with apros-
thetic leg may restrict functionality.
RIf aK EYLESS-GO key is within the rear detec-
tion range of KEYLESS-GO, HANDS-FREE
ACCESS could be triggered. The trunk lid
could thus be opened or closed unintention-
ally,f or example, if you:
-sit on the edge of the trunk.
-set something down or lift something up
behind the vehicle.
-polish the rear of the vehicle.
Do not carry the KEYLESS-GO key abouty our
person in these situations or in situations sim-
ilar to these. This will prevent the uninten-
tional opening/closing of the trunk.
Operation
XTo open/close: kick into sensor detection
range :under the bumper with your foot.
Aw arning tone will sound while the trunk lid is
opening or closing.
XIf the trunk lid does not open/close after
several attempts: wait at least ten seconds
and then using your foot kick under the
bumper again.
If you hold your foot under the bumper for too
long, the trunk lid does not open or close.
Repeatt he leg movement more quickly if this
occurs.
To stop the opening or closing procedure:
Rkick with your leg in the sensor detection
range :under the bumper or
Rpress the closing button on the trunk lid, or
Rpress the Fbutton on the SmartKey
If the trunk lid closing procedure has been stop-
ped:
Rmove your foot under the bumper againa nd
the trunk lid will open
If the trunk lid opening procedure has been
stopped:
Rmove your foot under the bumper againa nd
the trunk lid will close
Opening/closing automatically from
inside
Important safety notes
GWARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Exhaust
gases can enter the vehicle interior if the
Trunk85
Opening and closing
Z

The switches on the driver's door take prece-
dence.
:Frontleft
;Frontr ight
XTurn the SmartKey to position 1or 2in the
ignition lock.
XTo open manually: press and hold the cor-
responding switch.
XTo open fully: press the switch beyond the
point of resistanc eand release it.
Automatic operation is started.
XTo close manually: pull the corresponding
switch and hold it.
XTo close fully: pull the switch beyond the
point of resistanc eand release it.
Automatic operation is started.
XTo interrupt automatic operation: press/
pull the corresponding switch again.
If you press the switch beyond the point of
resistanc eand release, automatic operation is
started in the corresponding direction .You can
stop automatic operation by pressing/pulling
the switch again.
You can continue to operate the side windows
after you switch off the engine or remove the
SmartKey. This function is availablef or up to five
minutes or until the driver's or front-passenger
door is opened.
Convenience opening
General notes
If the SmartKey is in close proximitytot he vehi-
cle, the convenienc eopening function is availa-
ble.
Vehicles with KEYLESS-GO or KEYLESS-GO
startf unction: you can ventilate the vehicle
before you start driving. To do this, the SmartKey is used to carry out the
following functions simultaneously:
Runlock the vehicle
Ropen the side windows
Ropen the sliding sunroof or the panorama roof
with power tilt/sliding panel and the roller
sunblind
Rswitch on the seat ventilation for the driver's
seat
The "convenience opening" feature is also avail-
able when the vehicle is unlocked.
Convenience opening
XPress and hold the %button on the Smart-
Key until the side windows and the sliding
sunroof or the panorama roof with power tilt/
sliding panel are in the desired position.
If the roller sunblinds of the panorama roof
with power tilt/sliding panel are closed, the
roller sunblinds are opened first.
XPress and hold the %button once more
until the panorama roof with power tilt/slid-
ing panel reaches the desired position.
XTo interrupt convenience opening: release
the % button.
Convenience closing feature
Important safety notes
GWARNING
When the convenienc eclosing feature is oper-
ating, parts of the body could become trapped
in the closing area of the side window and the
sliding sunroof. There is arisk of injury.
Observe the complete closing procedure
when the convenienc eclosing feature is oper-
ating. Make sure that no body parts are in
close proximityd uring the closing procedure.
Vehicles with KEYLESS-GO or KEYLESS-GO
startf unction: if the SmartKey is in close prox-
imity to the vehicle, the convenienc eclosing
function is available.
88Side windows
Opening and closing

When you lock the vehicle, you can simultane-
ously:
Rclose the side windows
Rclose the sliding sunroof or the panorama roof
with power tilt/sliding panel
On vehicles with apanorama roof with power
tilt/sliding panel, you can then close the roller
sunblinds.
Notes on the automatic reversingf eature for:
Rthe side window (Ypage 87)
Rthe sliding sunroof or the panorama roof with
power tilt/sliding panel (Ypage 91)
Using the SmartKey
XPress and hold the&button until the side
windows and the sliding sunroof or the pano- rama roof with power tilt/sliding panel are
fully closed.
XMake sure that all the side windows and the
sliding sunroof or panorama roof with power
tilt/sliding panel are closed.
XVehicles with panorama roof with power
tilt/sliding panel: press and hold the&
button once more until the roller sunblinds of the panorama roof with power tilt/sliding
panel close.
XTo interrupt conveniencec losing:release
the & button.
Using KEYLESS-GO
The driver's door and the door at which the han-
dle is used, must both be closed. The SmartKey
must be outside the vehicle. The gap between
the SmartKey and the corresponding door han-
dle should not be greater than 3ft(1m).
XTouch recessed sensor surface :on the
door handle until the side windows and the sliding sunroof or the panorama roof with
power tilt/sliding panel are fully closed.
Make sure you only touch recessed sensor
surface
:.
XMake sure that all the side windows and the
sliding sunroof or panorama roof with power
tilt/sliding panel are closed.
XVehicles with panorama roof with power
tilt/sliding panel: touch recessed sensor
surface :on the door handle again until the
roller sunblinds of the panorama roof with
power tilt/sliding panel close.
XTo interrupt conveniencec losing:release
recessed sensor surface :on the door han-
dle.
Resetting the side windows
If as ide window can no longer be closed fully,
you must reset it.
XClose all the doors.
XTurn the SmartKey to position 1or 2in the
ignition lock.
XPull the corresponding switch on the door
control panel until the side window is com-
pletely closed (
Ypage 87).
XHold the switch for an additional second.
If the side window opens again slightly:
XImmediately pull the corresponding switch on
the door control panel until the side window is
completely closed (
Ypage 87).
XHold the switch for an additional second.
XIf the respective side window remains closed
after the button is released, then it has been
set correctly. If this is not the case, repeat the
steps above.
Side windows89
Opening and closing
Z

Adjusting thesteering wheel electri -
cally
:Adjusts th esteering whee lposition (fore-
and-af tadjustment)
;Adjusts th esteering whee lheight
iFurther relate dsubjects :
REASY-ENTRY/EXIT feature (Ypage 105)
RStoring settings(Ypage 109)
ROperating theon-bo ard computer
(Ypage 201).
Steering wheel heating
Switchin gon/off
XTurn th eSma rtKey to position 2in th eignition
loc k(Ypage 131).
XTo switch on/off: turnthe lever in th edirec -
tion of arrow :or;.
Indicato rlamp =lights up or goe sout.
Vehicles without KEYLESS-GO :when you
remove th eSma rtKey from th eignition lock, th e
steering whee lheating is deactivated.
Vehicles wit hKEYLESS-GO :when you switch off
th ei gnition and open th edriver's door ,the
steering whee lheating is deactivated.
104Steering wheel
Seats ,steering wheel and mirrors