2015 MERCEDES-BENZ S-CLASS COUPE keyless

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 88) and replace it if necessary
(Y page 88).
If this does not work: X Lock (Y page 93) or unlock (Y page 93) the vehicle using the
emergency key element. There is interference from a powerful source of radio waves.
X Lock (Y page 93) or unlock (Y page 93) the vehicle using the
emergency key element. The key is faulty.
X Lock (Y page 93) or unlock (Y page 93) the vehicle using the
emergency key element.
X Have the key checked at a qualified specialist workshop. You can no longer lock
or unlock the vehicle
using KEYLESS-GO. KEYLESS-GO was deactivated.
X Reactivate KEYLESS-GO (Y page 85). The key battery is discharged or nearly discharged.
X Check the key battery (Y page 88) and replace it if necessary
(Y page 88).
If this does not work: X Lock (Y page 93) or unlock (Y page 93) the vehicle using the
emergency key element. There is interference from a powerful source of radio waves.
X Lock (Y page 93) or unlock (Y page 93) the vehicle using the
emergency key element. There is a fault with KEYLESS-GO.
X Lock/unlock the vehicle using the remote control function of
the key.
X Have the vehicle and key checked at a qualified specialist work-
shop.
If the vehicle can also not be locked/unlocked using the remote
control function:
X Lock (Y page 93) or unlock (Y page 93) the vehicle using the
emergency key element.
X Have the vehicle and key checked at a qualified specialist work-
shop. Key
89Opening and closing Z

The doors can then be opened from the inside
after the vehicle has been locked from the
outside. The anti-theft alarm system is trig-
gered if the door is opened from the inside.
Switch off the alarm (Y page 80).
All countries: G
WARNING
If children are left unsupervised in the vehicle, they can:
R open doors and endanger other persons or
road users
R climb out and be injured by the traffic
R operate vehicle equipment and, for exam-
ple, trap themselves.
Children could also set the vehicle in motion, for example by:
R releasing the parking brake
R shifting the automatic transmission out of
park position P
R starting the engine.
There is a risk of an accident and injury.
When leaving the vehicle, always take the key
with you and lock the vehicle. Never leave
children unattended in the vehicle. Always
keep the key out of reach of children.
Stow luggage or loads preferably in the boot. Observe the loading guidelines (Y page 316).Unlocking and opening the doors
from the inside
i When a door is opened, the side window
on that side opens slightly. When the door
is closed, the side window is raised again.
! The side windows will not open/close if
the battery is discharged or if the side win-
dows have iced up. It will then not be pos-
sible to close the door. Do not attempt to
force the door to close. You could other-
wise damage the door or the side window.
Only for the United Kingdom: if the vehicle
has been locked with the key or with KEY-
LESS-GO, the double lock function is activa- ted as standard. It is then not possible to open
the doors from inside the vehicle. You can
deactivate the double lock function by deac-
tivating the interior motion sensor . The doors can then be opened from the inside after thevehicle 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 80).
For all countries except the United King-
dom:
You can open a door from inside the vehicle
even if it has been locked. If the vehicle has
previously been locked with the key or with
KEYLESS-GO, opening a door from the inside will trigger the anti-theft alarm system.
Switch off the alarm (Y page 80). X
Pull 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 buttons are located on
both doors. Doors
91Opening and closing Z

X
To unlock: press button :.
X To lock: press button ;.
If the front-passenger door is closed, the
vehicle locks.
If the driver's door is open, the door stays
unlocked.
This does not lock or unlock the fuel filler flap. You cannot unlock the vehicle centrally from
the inside if the vehicle has been locked with
the key or KEYLESS-GO.
For all countries except the United King-
dom:
The doors can be opened from the inside.
If the vehicle has previously been locked with the key or with KEYLESS-GO, opening a door
from the inside will trigger the anti-theft alarmsystem. Switch off the alarm (Y page 80).
United Kingdom only: if the vehicle has
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 inside the vehicle. You can deac-
tivate the double lock function by deactivat-
ing the interior motion sensor (Y page 82). It
is then possible to operate the doors as fol-
lows. The doors can be opened from the
inside.
i When a locked door is opened from inside
the vehicle, the previous unlocking process
will be observed if the vehicle has been:
R locked with the locking button for the
central locking or
R locked automatically The vehicle will be fully unlocked if it had
previously been fully unlocked. Only the
door which has been opened from the
inside is unlocked if only the driver's door
had been previously unlocked. Automatic locking feature
X
To deactivate: press and hold button :
for about five seconds until a tone sounds.
X To activate: press and hold button ;for
about five seconds until a tone sounds.
i If you press one of the two buttons and do
not hear a tone, the relevant setting has
already been selected.
The vehicle is locked automatically when the
ignition is switched on and the wheels are
turning.
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 a dynamom-
eter.
i You can switch the automatic locking
function on and off using COMAND Online
(see the separate operating instructions). Power closing
Power closing pulls the doors and boot lid into
their locks automatically even if they are only partly closed. 92
DoorsOpening and closing

X
To power close a door: push the door into
the lock up to the first detent position.
Power closing will pull the door fully closed.
X To power close the boot lid: lightly push
the boot lid closed.
The power closing function pulls the boot
lid closed. Unlocking the driver's door (emer-
gency key element)
If the vehicle can no longer unlocked with the key or KEYLESS-GO, use the emergency key
element.
X Take the emergency key element out of the
key (Y page 87). X
Insert the emergency key element into
opening :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
Insert the emergency key element into the
lock of the driver's door as far as it will go.
X Turn the emergency key element to the left
as far as it will go to position 1.
The locking knob pops up and the door
unlocks.
On right-hand-drive vehicles, turn the emer-
gency key element clockwise. X Turn the emergency key element back and
remove it.
X Insert the emergency key element into the
key (Y page 87).
X Carefully press the protective cap onto the
lock cylinder until it engages and is seated
firmly. Do not pull the door handle when
doing so.
If you use the emergency key element to
unlock and open the driver's door, the anti-
theft alarm system will be triggered. Switch
off the alarm (Y page 80). Locking the vehicle (emergency key
element)
If the vehicle can no longer be locked with the
key or KEYLESS-GO, use the emergency key
element.
X Open the driver's door.
X Close the front-passenger door and the
boot lid.
X Press the locking button (Y page 91).
X Check whether the locking knob on the
front-passenger door is still visible. Press
the locking knob down by hand if neces-
sary.
X Close the driver's door.
X Take the emergency key element out of the
key (Y page 87). Doors
93Opening and closing Z

R
Press the remote operating switch on the
driver's door, or
R In vehicles with HANDS-FREE ACCESS:
kick into the sensor detection range
under the bumper with your foot.
i If the
F button on the key is pressed or
HANDS-FREE ACCESS is initiated after the
closing process is stopped, the boot lid
opens.
Vehicles with boot lid remote closing fea- ture and KEYLESS-GO: when all the doors
are closed, you can simultaneously close the
boot lid and lock the vehicle. The key must be located to the rear of the vehicle.
X Press and release locking button ;on the
boot lid.
If a KEYLESS-GO key is detected outside
the vehicle, the boot lid closes and the vehi-
cle locks.
i If KEYLESS-GO detects a key in the boot,
the boot lid opens again after it is closed.
If KEYLESS-GO detects a second key out-
side the vehicle, the boot lid remains
closed. 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 a risk of injury. Always
ensure that you only make a leg movement
within the detection range of sensors.
! If the key is within the rear detection
range of KEYLESS-GO, the following situa-
tions, for example, could lead to the boot lid opening unintentionally:
R using a car wash
R using a high-pressure cleaner
Make sure that the key is at least 3 m away
from the vehicle. General notes With KEYLESS-GO and HANDS-FREE
ACCESS, you can open or close the boot lid or
stop the procedure without using your hands. This is useful if you have your hands full. To do
this, make a kicking movement under the
bumper with your foot.
Observe the following points:
R Carry your KEYLESS-GO key about your
person. 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 clear-
ance to the rear of the vehicle. You could
otherwise lose your balance, e.g. on ice. R
Always ensure that you only make a kicking
movement within the detection range of
sensors :.
R Stand at least 30 cm away from the rear
area while doing so.
R Do not come into contact with the bumper
while making the kicking movement. Oth-
erwise, the sensors may not function cor-
rectly.
R HANDS-FREE ACCESS does not function
when the engine is started.
R If a KEYLESS-GO key is within the rear
detection range of KEYLESS-GO, HANDS-
FREE ACCESS could be triggered. The boot 96
BootOpening and closing

lid could thus be opened or closed unin-
tentionally, for example, if you:
- 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 about
your person in such situations. This will
prevent the unintentional opening/closing
of the boot.
R Dirt caused by road salt around sensors :
may restrict functionality.
R Using HANDS-FREE ACCESS with a pros-
thetic leg may restrict functionality.
Operation X
To open/close: kick into sensor detection
range :under the bumper with your leg.
You will hear a warning tone while the boot lid is opening or closing.
X If the boot lid does not open after sev-
eral attempts: wait at least ten seconds
then kick under the bumper once again.
i If you hold your foot under the bumper for
too long, the boot lid does not open or
close. Repeat the kicking movement more
quickly if this occurs.
Stopping the opening or closing procedure:
R kick with your leg in the sensor detection
range :under the bumper or
R press the closing button in the boot lid, or
R press the Fbutton on the key If the boot lid closing procedure has been
stopped:
R move your foot under the bumper again and
the boot lid will open
If the boot lid opening procedure has been
stopped:
R move your foot under the bumper again and
the boot lid will close Opening/closing automatically from
the inside
Important safety notes G
WARNING
Parts of the body could become trapped dur-
ing automatic closing of the boot lid. More-
over, people, e.g. children, may be standing in the closing area or may enter the closing area
during the closing process. There is a risk of
injury.
Make sure that nobody is in the vicinity of the closing area during the closing process.
Use one of the following options to stop the
closing process:
R press the Fbutton on the key.
R pull or press the remote operating switch
on the driver's door.
R press the closing or locking button on the
boot lid.
! The boot lid swings upwards when
opened. Therefore, make sure that there is sufficient clearance above the boot lid.
i The opening dimensions of the boot lid
can be found in the "Vehicle data" section
(Y page 410). Boot
97Opening and closing Z

Convenience opening feature
X
Keep the %button pressed until the
side windows are in the desired position.
X To interrupt convenience opening:
release the %button. Convenience closing feature
Important safety notes G
WARNING
When using convenience closing, you could
become trapped within the sweep of the clos- ing window. There is a risk of injury.
Monitor the entire closing procedure when
using convenience closing. When closing,
make sure that no one has any parts of the
body within the closing area.
When you lock the vehicle, you can close the
windows at the same time.
You can then close the roller sunblinds.
i Notes on the automatic reversing feature
for:
R the side windows (Y page 99)
R the roller sunblind (Y page 103)
Using the key X
Press and hold the &button until the
side windows are fully closed.
X Make sure that all the side windows are
closed.
X Press and hold the &button again until
the roller sunblinds of the panorama roof
close.
X To interrupt convenience closing:
release the &button.
Using KEYLESS-GO The key must be outside the vehicle. All the
doors must be closed. X
Touch recessed sensor surface :on the
door handle until the side windows are fully
closed.
i Make sure you only touch recessed sen-
sor surface :.
X Make sure that all the side windows are
closed.
X Touch recessed sensor surface :on the
door handle again until the roller sunblind
of the panorama roof closes.
X To interrupt convenience closing:
release recessed sensor surface :on the
door handle. Resetting the side windows
If a side window can no longer be closed fully, you must reset it.
X Close all doors.
X Turn the key to position 1or 2in the ignition
lock (Y page 161).
X Pull the corresponding switch on the door
control panel until the side window is com- pletely closed (Y page 100).
X Hold the switch for an additional second.
If the side window opens again slightly: X Immediately pull the corresponding switch
on the door control panel until the side win-
dow is completely closed (Y page 100).
X Hold the switch for an additional second.
X If the corresponding side window remains
closed after the button has been released, Side windows
101Opening and closing Z

Steering wheel heating
Activating/deactivating X
Turn the key to position 2in the ignition
lock (Y page 161).
X To switch on/off: turn the lever in the
direction of arrow :or;.
Indicator lamp =lights up or goes out.
Vehicles without KEYLESS-GO: when you
remove the key from the ignition lock, the
steering wheel heating is switched off.
Vehicles with KEYLESS-GO: when you switch
off the ignition and open the driver's door, the steering wheel heating is switched off. Steering wheel
117Seats, steering wheel and mirrors Z