2016 MERCEDES-BENZ S-Class COUPE Owner's Manual

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 86) and replace it if nec-
essary (
Ypage 86).
If this does not work:
XUnlock (Ypage 90) or lock (Ypage 91) the vehicle using the
mechanical key.
There is interference from a powerful source of radio waves.
XUnlock (Ypage 90) or lock (Ypage 91) the vehicle using the
mechanical key.
The SmartKey is faulty.
XUnlock (Ypage 90) or lock (Ypage 91) the vehicle using the
mechanical key.
XHave the SmartKey checked at a qualified specialist workshop.
You can no longer lock
or unlock the vehicle
using KEYLESS-GO.KEYLESS-GO was deactivated.
XReactivate KEYLESS-GO (Ypage 83).
The SmartKey battery is discharged or nearly discharged.
XCheck the SmartKey battery (Ypage 86) and replace it if nec-
essary (
Ypage 86).
If this does not work:
XUnlock (Ypage 90) or lock (Ypage 91) the vehicle using the
mechanical key.
There is interference from a powerful source of radio waves.
XUnlock (Ypage 90) or lock (Ypage 91) 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 a qualified specialist
workshop.
If the vehicle can also not be locked/unlocked using the remote
control function:
XLock (Ypage 90) or unlock (Ypage 91) the vehicle using the
mechanical key.
XHave the vehicle and SmartKey checked at a qualified specialist
workshop.
SmartKey87
Opening and closing
Z

ProblemPossible causes/consequences andMSolutions
The engine cannot be
started using the
SmartKey.The on-board voltage is too low.
XSwitch off non-essential consumers, e.g. seat heating or interior
lighting, and try to start the engine again.
If this does not work:
XCheck the starter battery and charge it if necessary
(
Ypage 349).
or
XJump-start the vehicle (Ypage 351).
or
XConsult a qualified specialist workshop.
The engine cannot be
started using the Start/
Stop button. The
SmartKey is in the vehi-
cle.The vehicle is locked.
XUnlock the vehicle and try to start the vehicle again.
The SmartKey battery is discharged or nearly discharged.
XCheck the SmartKey battery (Ypage 86) and replace it if nec-
essary (
Ypage 86).
If this does not work:
XStart your vehicle with the SmartKey in the ignition lock.
There is interference from a powerful source of radio waves.
XStart your vehicle with the SmartKey in the ignition lock.
You have lost a Smart-
Key.XHave the SmartKey deactivated at a qualified specialist work-
shop.
XReport the loss immediately to the vehicle insurers.
XIf necessary, have the locks changed as well.
You have lost the
mechanical key.XReport the loss immediately to the vehicle insurers.
XIf necessary, have the locks changed as well.
88SmartKey
Opening and closing

Doors
Important safet ynotes
GWARNING
If children are lef tunsupervised in th evehicle,
they could:
Rope nth edoors ,thus endangerin gother
people or road users.
Rget out and disrup ttraffic .
Roperat eth evehicle' sequipment.
Additionally, children could set th evehicle in
motion if, fo rexample, they:
Rrelease th eparking brake .
Rshiftingth eautomatic transmissio nout of
par kposition P
RStart theengine.
There is aris kof an acciden tand injury.
Whe nleavin gth evehicle, always take th e
SmartKey wit hyou and loc kth evehicle. Never
leav echildren or animals unattended in th e
vehicle. Always keep th eSmartKey out of
reach of children .
You should preferably plac eluggage or load s
in th etrunk .Observ eth eloadin gguidelines
(
Ypage 300).
Unlockin gan dopening doors from
th einside
i
Whe n adoo ris opened, th esid ewindow
on that sid eopens slightly. Whe nth edoo r
is closed, th esid ewindow close sagain .
!The sid ewindows will no topen/close if
th ebattery is discharged or if th esid ewin -
dows hav eiced up. It will then no tbe pos -
sible to close th edoor. Do no tattempt to
forc eth edoo rclosed. You could otherwise
damage th edoo ror th esid ewindow.
You can ope n adoo rfrom insid eth evehicle
eve nif it has been locked. If th evehicle has
been locke dwit hth eSmartKey or wit hKEY-
LESS-GO ,opening adoo rfrom th einsid ewill trigger th
eanti-thef talar msystem. Switc hof f
th ealar m (
Ypage 78).
XPull doo rhandle ;.
If th edoo ris locked, locking knob :pop s
up. The doo ris unlocke dand opens .
Centrally locking an dunlocking th e
vehicle from th einside
You can centrall yloc kand unloc kth evehicle
from th einside. The buttons are located on
bot hdoors .
XTo unlock :press butto n:.
XTo lock :press butto n;.
If th efront-passenger doo ris closed, th e
vehicle locks .
If th edriver's doo ris open, th edoo rstays
unlocked.
Meanwhile, th efue lfiller flap will no tbe
locke dor unlocked.
You canno tunloc kth evehicle centrall yfrom
th einsid eif th evehicle has been locke dwit h
th eSmartKey or KEYLESS-GO .
Doors89
Opening and closing
Z

The doors can be opened from the inside.
If the vehicle has been locked with the Smart-
Key or with KEYLESS-GO, opening a door from
the inside will trigger the anti-theft alarm sys-
tem. Switch off the alarm (
Ypage 78).
iIf a locked door is opened from the inside,
the previous unlock status of the vehicle
will be taken into consideration if:
Rthe vehicle was locked using the locking
button for the central locking, or
Rif the vehicle was locked automatically
The vehicle will be fully unlocked if it had
previously 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 about five seconds until a tone sounds.
XTo activate: press and hold button ;for
about five seconds until a tone sounds.
iIf 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.
You could therefore be locked out if:
Rthe vehicle is being pushed.
Rthe vehicle is being towed.
Rthe vehicle is on a roller dynamometer.
iYou can switch the automatic locking
function on and off using COMAND (see the separate operating instructions).
Power closing
Power closing pulls the doors and trunk lid
into their locks automatically even if they are
only partly closed.
XTo power close a door: push the door into
the lock up to the first detent position.
Power closing will pull the door fully closed.
XTo power close the trunk lid: lightly push
the trunk lid closed.
The power closing function pulls the trunk
lid closed.
Unlocking the driver's door (mechan-
ical key)
If the vehicle can no longer be locked or
unlocked with the SmartKey or KEYLESS-GO,
use the mechanical key.
XTake the mechanical key out of the Smart-
Key (
Ypage 85).
XInsert the mechanical key into opening :
in the protective cap.
XPull and hold the door handle.
XPull the protective cap on the mechanical
key as straight as possible away from the
vehicle until it releases.
XRelease the door handle.
90Doors
Opening and closing

XInsert the mechanical key into the lock of
the driver's door as far as it will go.
XTurn the mechanical key counter-clockwise
as far as it will go to position 1.
The locking knob pops up and the door
unlocks.
XTurn the mechanical key back and remove
it.
XInsert the mechanical key into the Smart-
Key (
Ypage 85).
XCarefully 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 mechanical key to unlock and
open the driver's door, the anti-theft alarm
system will be triggered. Switch off the alarm
(
Ypage 78).
Locking the vehicle (mechanical key)
If the vehicle can no longer be locked with the SmartKey or KEYLESS-GO, use the mechani-
cal key.
XOpen the driver's door.
XClose the front-passenger door and the
trunk lid.
XPress the locking button (Ypage 89).
XCheck whether the locking knob on the
front-passenger door is still visible. Press
the locking knob down by hand, if neces-
sary.
XClose the driver's door.
XTake the mechanical key out of the Smart-
Key (
Ypage 85).
XInsert the mechanical key into opening :
in the protective cap.
XPull and hold the door handle.
XPull the protective cap on the mechanical
key as straight as possible away from the
vehicle until it releases.
XRelease the door handle.
XInsert the mechanical key into the lock of
the driver's door as far as it will go.
XTurn the mechanical key clockwise as far as
it will go to position 1.
The locking knob drops down and the driv-
er's door is locked.
XTurn the mechanical key back and remove
it.
XMake sure that the doors and the trunk lid
are locked.
Doors91
Opening and closing
Z

XInsert the mechanical key into the Smart-
Key (
Ypage 85).
XCarefully press the protective cap onto thelock cylinder until it engages and is seated
firmly. Do not pull the door handle when
doing so.
iIf you lock the vehicle as described above,
the fuel filler flap is not locked. The anti-
theft alarm system is not armed.
Trunk
Important safety notes
GWARNING
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 a risk of injury, particu-
larly in the event of sudden braking or a sud-
den change in direction.
Always store objects so that they cannot be
flung around. Secure objects, luggage or
loads against slipping or tipping before the
journey.
!The trunk lid swings upwards when
opened. Therefore, make sure that there is
sufficient clearance above the trunk lid.
iYou can limit the opening angle of the
trunk lid in COMAND; see the separate
operating instructions.
iThe opening dimensions of the trunk lid
can be found in the "Vehicle data" section
(
Ypage 406).
Do not leave the SmartKey in the trunk. You
could otherwise lock yourself out.
You should preferably place luggage or loads
in the trunk. Observe the loading guidelines
(
Ypage 300).
Obstacle recognition with trunk lid
reversing feature
On vehicles with trunk lid remote closing fea- ture, the trunk lid is equipped with automatic
obstacle recognition with reversing feature. If
a solid object blocks or restricts the trunk lid
when automatically opening or closing, this
procedure is stopped. If the trunk lid is stop-
ped during the closing procedure, it will open again automatically. The automatic obstacle
recognition with reversing feature is only an
aid. It is not a substitute for your attentive-
ness when opening and closing the trunk lid.
GWARNING
The reversing feature does not react:
Rto soft, light and thin objects, e.g. small fin-
gers
Rover the last 1/3 in (8 mm) of the closing
movement
This means that the reversing feature cannot
prevent someone being trapped in these sit-
uations. There is a risk of injury.
Make sure that no body parts are in close
proximity during the closing procedure.
If somebody becomes trapped:
Rpress the Fbutton on the SmartKey, or
Rpull or press the remote operating switch
on the driver's door or
Rpress the closing or locking button on the
trunk lid
Opening/closing automatically from
outside
Important safety notes
GWARNING
Parts of the body could become trapped dur-
ing automatic closing of the trunk 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.
92Trunk
Opening and closing

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:
Rpress theFbutton on the SmartKey.
Rpull or press the remote operating switch
on the driver's door.
Rpress the closing or locking button on the
trunk lid.
GWARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Exhaust
gases can enter the vehicle interior if the
trunk lid is open when the engine is running,
especially if the vehicle is in motion. There is a
risk of poisoning.
Always switch off the engine before opening
the trunk lid. Never drive with the trunk lid
open.
!The trunk lid swings upwards when
opened. Therefore, make sure that there is
sufficient clearance above the trunk lid.
iThe opening dimensions of the trunk lid
can be found in the "Vehicle data" section
(
Ypage 406).
Opening
You can open the trunk lid automatically
using the SmartKey.
XPress and hold the Fbutton on the
SmartKey until the trunk lid opens.
Closing
You can close the trunk lid automatically
using the SmartKey or the closing button in
the trunk lid.
XPress and release closing button :on the
trunk lid.
or
XIf the SmartKey is located in the immediate
vicinity of the vehicle: press the Fbut-
ton on the SmartKey.
You can release the button as soon as the
trunk lid starts to close.
XTo stop the closing process:
RPress the Fbutton on the SmartKey,
or
RPress closing button :or locking but-
ton ;on the trunk lid, or
RPress the remote operating switch on the
driver's door, or
RIn vehicles with HANDS-FREE ACCESS:
kick into the sensor detection range
under the bumper with your foot.
iIf the F button on the SmartKey is
pressed or HANDS-FREE ACCESS is initi-
ated after the closing process is stopped,
the trunk lid opens.
Trunk93
Opening and closing
Z

Vehicles with trunk lid remote closing
feature and KEYLESS-GO:when all the
doors are closed, you can simultaneously
close the trunk lid and lock the vehicle. The
SmartKey must be located to the rear of the
vehicle.
XPress and release locking button ;on the
trunk lid.
If a KEYLESS-GO key is detected outside
the vehicle, the trunk lid closes and the
vehicle locks.
iIf KEYLESS-GO detects a SmartKey in the
trunk, the trunk lid opens again after it is
closed.
If KEYLESS-GO detects a second SmartKey
outside the vehicle, the trunk lid remains
closed.
HANDS-FREE ACCESS
Important safety notes
GWARNING
The vehicle's exhaust system may be very hot. You could burn yourself by touching the
exhaust system if you use HANDS-FREE
ACCESS. There is a risk 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 detec-
tion range of KEYLESS-GO, the following
situations, for example, could lead to the
unintentional opening of the trunk:
Rusing a car wash
Rusing a power washer
Make sure that the SmartKey is at least
10 ft (3 m) awayfrom the vehicle.
General notes
With KEYLESS-GO and HANDS-FREE
ACCESS, you can open or close the trunk 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:
RCarry your KEYLESS-GO key about your
person. 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 clear-
ance to the rear of the vehicle. You could
otherwise lose your balance, e.g. on ice.
RAlways ensure that you only make the kick-
ing movement within the detection range of
sensors :.
RStand at least 12 in (30 cm) away from the
rear area while doing so.
RDo not come into contact with the bumper
while making the kicking movement. Oth-
erwise, the sensors may not function cor-
rectly.
RHANDS-FREE ACCESS does not function
when the engine is started.
RIf a KEYLESS-GO key is within the rear
detection range of KEYLESS-GO, HAND-
FREE ACCESS could be triggered. The trunk
lid could thus be opened or closed unin-
tentionally, for 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 about
your person in these situations or in situa-
94Trunk
Opening and closing