2016 MERCEDES-BENZ S-Class SEDAN key

tery compartment cover:opens. Do not
hold battery compartment cover :closed
while doing so.
XRemove battery compartment cover :.
XRepeatedly tap the SmartKey against your
palm until battery=falls out.
XInsert the new battery with the positive ter-
minal facing upwards. Use a lint-free cloth to
do so.
XMake sure that the surface of the battery is
free of lint, grease and other contaminants.
XInsert the front tabs of battery compartment
cover :into the housing first and then press
to close it.
XInsert mechanical key ;into the SmartKey
(Ypage 82).
XCheck the function of all SmartKey buttons on
the vehicle.
SmartKey83
Opening and closing
Z

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 82) and replace it if necessary
(Ypage 82).
If this does not work:
XUnlock (Ypage 87) or lock (Ypage 88) the vehicle using the
mechanical key.
There is interference from a powerful source of radio waves.
XUnlock (Ypage 87) or lock (Ypage 88) the vehicle using the
mechanical key.
The SmartKey is faulty.
XUnlock (Ypage 87) or lock (Ypage 88) 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 80).
The SmartKey battery is discharged or nearly discharged.
XCheck the SmartKey battery (Ypage 82) and replace it if necessary
(Ypage 82).
If this does not work:
XUnlock (Ypage 87) or lock (Ypage 88) the vehicle using the
mechanical key.
There is interference from a powerful source of radio waves.
XUnlock (Ypage 87) or lock (Ypage 88) 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 con-
trol function:
XLock (Ypage 87) or unlock (Ypage 88) the vehicle using the
mechanical key.
XHave the vehicle and SmartKey checked at a qualified specialist
workshop.
84SmartKey
Opening and closing

ProblemPossible causes/consequences andMSolutions
The engine cannot be
started using the Smart-
Key.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 374).
or
XJump-start the vehicle (Ypage 376).
or
XConsult a qualified specialist workshop.
The engine cannot be
started using the Start/
Stop button. The Smart-
Key is in the vehicle.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 82) and replace it if necessary
(Ypage 82).
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 workshop.
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.
Doors
Important safety notes
GWARNING
If children are left unsupervised in the vehicle,
they could:
Ropen the doors, thus endangering other
people or road users.
Rget out and disrupt traffic.
Roperate the vehicle's equipment.
Additionally, children could set the vehicle in
motion if, for example, they:
Rrelease the parking brake.
Rshifting the automatic transmission out of
park position P
RStart the engine.
There is a risk of an accident and injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children or animals unattended in the
vehicle. Always keep the SmartKey out of
reach of children.
Doors85
Opening and closing
Z

Unlocking and opening doors from
the inside
You can open a door from inside the vehicle
even if it has been locked. You can only open the
rear doors from inside the vehicle if they are notsecured by the child-proof locks (
Ypage 67). If
the vehicle has been locked with the SmartKey
or with KEYLESS-GO, opening a door from the
inside will trigger the anti-theft alarm system.
Switch off the alarm (
Ypage 78).
XTo unlock and open a front door: pull door
handle ;.
If the door is locked, locking knob :pops up.
The door is unlocked and opens.
XTo unlock a rear door: pull door handle;.
Locking knob :pops up and the door
unlocks.
XTo open a rear door: pull door handle;
again.
The door 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
front doors.
XTo unlock: press button :.
XTo lock:press button ;.
If the front-passenger door is closed, the vehi-
cle locks.
If the driver's door is open, the door stays
unlocked.
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. You
can only open the rear doors from inside the
vehicle if they are not secured by the child-proof
locks (
Ypage 67).
If the vehicle has been locked with the SmartKey
or with KEYLESS-GO, opening a door from the
inside will trigger the anti-theft alarm system.
Switch off the alarm (
Ypage 78).
If 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 but-
ton for the central locking, or
Rif the vehicle was 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.
86Doors
Opening and closing

Automa tic locking featu re
XTo deactivate:press and hold butto n: for
approximately fiv eseconds until atone
sounds.
XTo activate: press and hold butto n; for
approximately fiv eseconds until atone
sounds.
If you press on eof th etwo buttons and do no t
hear atone ,th erelevan tsetting has already
been selected.
The vehicl eis locke dautomatically when th e
ignition is switched on and th ewheels are turn-
ing .
You could therefor ebe locke dout if:
Rth evehicl eis bein gpushed.
Rth evehicl eis bein gtowed.
Rth evehicl eis on aroller dynamometer.
You can also switch th eautomatic locking func-
tion on and off usin gth emultimedia system; see
th eseparat eoperating instructions.
Power closing
Powe rclosin gpulls th edoor sand trunk lid int o
their locks automatically eve nif they are only
partly closed.
XTo power close adoor :push th edoor int o
th eloc kup to th efirst deten tposition .
Powe rclosin gwill pull th edoor fully closed.
XTo power close th etrunk lid :lightl ypush
th etrunk lid closed.
The powe rclosin gfunction pulls th etrunk lid
closed.
Unlocking the driver's door(mechan-
ical key)
If th evehicl ecan no longer be locke dor
unlocke dwit hth eSmartKey or KEYLESS-GO ,
use th emechanical key.
XTak eth emechanical ke yout of th eSmartKey
(Ypage 81).
XInser tth emechanical ke yas far as it will go
int oopening :in th eprotective cap .
XPull and hold th edoor handle.
XPull th eprotective cap on th emechanical ke y
as straight as possibl eaway from th evehicl e
until it releases.
XReleas eth edoor handle.
XInser tth emechanical ke yint oth eloc kof th e
driver's door as far as it will go.
XTurn th emechanical ke ycounter-clockwise
as far as it will go to position 1.
The locking knob pops up and th edoor
unlocks .
XTurn themechanical ke ybac kand remove it .
XInsertth emechanical ke yint oth eSmartKey
(Ypage 82) .
XCarefully press th eprotective cap onto th e
loc kcylinder until it engage sand is seated
Doors87
Opening and closing
Z

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 sys-
tem 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 mechanical
key.
XOpen the driver's door.
XClose the front-passenger door, the rear
doors and the trunk lid.
XPress the locking button (Ypage 86).
XCheck whether the locking knobs on the
front-passenger door and the rear doors are
still visible. Press down the locking knobs by
hand, if necessary.
XClose the driver's door.
XTake the mechanical key out of the SmartKey
(Ypage 81).
XInsert the mechanical key as far as it will go
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 driver's
door is locked.
XTurn the mechanical key back and remove it.
XMake sure that the doors and the trunk lid are locked.
XInsert the mechanical key into the SmartKey
(Ypage 82).
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 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
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.
GWARNING
If objects, luggage or loads are not secured or
not secured sufficiently, they could slip, tip
88Trunk
Opening and closing

over or be flung around and thereby hit vehicleoccupants. 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.
The opening dimensions of the trunk lid can be
found in the "Vehicle data" section
(
Ypage 433).
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 325).
Obstruction detection with reversing
feature for the trunk lid
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 pro-
cedure is stopped. If the trunk lid is stopped
during the closing procedure, it will open again
automatically. The automatic obstacle recogni-
tion with reversing feature is only an aid. It is not a substitute for your attentiveness when open-
ing 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, or
Rpull on the trunk lid handle
Vehicles with HANDS-FREE ACCESS: it is also
possible to stop the closing process by perform-
ing a kicking movement under the rear bumper.
Opening and closing manually
Opening
XPress the Fbutton on the SmartKey.
or
XPull handle :.
The trunk lid opens.
Closing
XPull the trunk lid down using recess :.
Trunk89
Opening and closing
Z

Vehicles with trunk lid remote closing fea-
ture or power closing:
XLightly push the trunk lid closed.
The power closing function pulls the trunk lid
closed.
XLock the vehicle if necessary with the&
button on the SmartKey or with KEYLESS-GO
(
Ypage 80).
iIf KEYLESS-GO detects a SmartKey in the
trunk, the trunk lid cannot be locked. It then
opens again.
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.
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 the Fbutton 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.
Rpull the trunk lid handle
Vehicles with HANDS-FREE ACCESS: it is also
possible to stop the closing process by perform-
ing a kicking movement under the rear bumper.
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.
The opening dimensions of the trunk lid can be
found in the "Vehicle data" section
(
Ypage 433).
Opening
You can open the trunk lid automatically using
the SmartKey or the handle in the trunk lid.
XPress and hold the Fbutton on the Smart-
Key until the trunk lid opens.
or
XIf the trunk lid is unlocked, pull the trunk lid
handle and let it go again immediately.
Closing
You can close the trunk lid automatically using
the SmartKey or the closing button in the trunk
lid.
XPress closing button :on the trunk lid.
or
XIf the SmartKey is located in the immediate
vicinity of the vehicle: press the Fbutton
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
RPull the trunk lid handle, or
RPress closing button :or locking but-
ton ;on the trunk lid, or
90Trunk
Opening and closing