2015 MERCEDES-BENZ M-Class key

Problems with the SmartKey
Problem
Possible causes/consequences and
0050
0050Solutions You cannot lock or
unlock the vehicle
using the SmartKey. The SmartKey battery is discharged or nearly discharged.
X Try again to lock/unlock the vehicle using the remote control
function of the SmartKey. Point the tip of the SmartKey at the
driver's door handle from close range and press the 0036or
0037 button.
If this does not work:
X Check the SmartKey battery (Y page 83) and replace it if nec-
essary (Y page 83).
X Lock (Y page 88) or unlock (Y page 88) the vehicle using the
mechanical key. The SmartKey is faulty.
X Lock (Y page 88) or unlock (Y page 88) the vehicle using the
mechanical key.
X Have the SmartKey checked at a qualified specialist workshop. You can no longer lock
or unlock the vehicle
using KEYLESS-GO. There is interference from a powerful source of radio waves.
X Lock/unlock the vehicle using the remote control function of
the SmartKey. Point the tip of the SmartKey at the driver's door
handle from close range and press the 0036or0037 button. There is a malfunction with KEYLESS-GO.
X Lock/unlock the vehicle using the remote control function of
the SmartKey. Point the tip of the SmartKey at the driver's door
handle from close range and press the 0036or0037 button.
X Have KEYLESS-GO checked at a qualified specialist workshop.
If this does not work:
X Check the SmartKey battery (Y page 83) and replace it if nec-
essary (Y page 83).
X Lock (Y page 88) or unlock (Y page 88) the vehicle using the
mechanical key. You have lost a Smart-
Key. X
Have the SmartKey deactivated at a qualified specialist work-
shop.
X Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. You have lost the
mechanical key. X
Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. SmartKey
85Opening and closing Z

Problem
Possible causes/consequences and
0050
0050Solutions The engine cannot be
started using the
SmartKey. 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 389).
or
X Jump-start the vehicle (Y page 391).
or
X Consult a qualified specialist workshop. The engine cannot be
started using KEYLESS-
GO. The SmartKey is in
the vehicle. A door is open. Therefore, the SmartKey cannot be detected as
easily.
X Close the door and try to start the vehicle again. There is interference from a powerful source of radio waves.
X Start your vehicle with the SmartKey in the ignition lock. Doors
Important safety notes
G
WARNING
If children are left unsupervised in the vehicle, they could:
R open the doors, thus endangering other
people or road users.
R get out and disrupt traffic.
R operate the vehicle's equipment.
Additionally, children could set the vehicle in
motion if, for example, they:
R release the parking brake.
R shifting the automatic transmission out of
park position P
R Start 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. G
WARNING
If persons, particularly children are subjected to prolonged exposure to extreme heat or
cold, there is a risk of injury, possibly even
fatal. Never leave children unattended in the
vehicle. 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 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.
You should preferably place luggage or loads
in the cargo compartment. Observe the load- ing guidelines (Y page 334).86
DoorsOpening and closing

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 not secured by the child-proof locks
(Y page 66).
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 (Y page 77).X
Front door: pull door handle 0044.
If the door is locked, locking knob 0043pops
up. The door is unlocked and can be
opened.
X Rear door: pull up locking knob 0043on the
relevant rear door.
The rear door is unlocked and can be
opened. Centrally locking and unlocking the
vehicle from the inside
You can centrally lock or unlock the vehicle
from the inside. The buttons are located on
both front doors. 0043
To unlock
0044 To lock
X To unlock: press button 0043.
X To lock: press button 0044.
If the front-passenger door is closed, the
vehicle locks.
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.
You can open a front door from inside the
vehicle even if it has been locked.
If the vehicle has been locked using the lock-
ing button for the central locking, or has been
locked automatically, and a door is opened
from the inside:
R the vehicle will be fully unlocked if it had
previously been fully unlocked
R only the door which has been opened form
the inside is unlocked if only the driver's
door had been previously unlocked Doors
87Opening and closing Z

Automatic locking feature
X
To disarm: press and hold button 0043for
about five seconds until a tone sounds.
X To arm: press and hold button 0044for 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.
You could therefore be locked out if:
R the vehicle is being pushed.
R the vehicle is being towed.
R the vehicle is on a roller dynamometer.
You can also switch the automatic locking
function on and off using the on-board com-
puter (Y page 279). Power closing
Power closing pulls the doors and trunk lid
into their locks automatically even if they are only partly closed.
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 tailgate: lightly press
the tailgate downwards.
Power closing will pull the tailgate fully
closed. Unlocking the driver's door (mechan-
ical key)
If the vehicle can no longer be unlocked with
the SmartKey, use the mechanical key.
If you use the mechanical key to unlock and
open the driver's door, the anti-theft alarm
system will be triggered (Y page 77).
X Take the mechanical key out of the Smart-
Key (Y page 82).
X Insert the mechanical key into the lock of
the driver's door as far as it will go. X
Turn the mechanical key counter-clockwise
to position 0047.
The door is unlocked.
X Turn the mechanical key back and remove
it.
X Insert the mechanical key into the Smart-
Key. Locking the vehicle (mechanical key)
If the vehicle can no longer be locked with the
SmartKey, use the mechanical key.
X Open the driver's door.
X Close the front-passenger door, the rear
doors and the tailgate.
X Press the locking button (Y page 87).
X Check 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.
X Close the driver's door. 88
DoorsOpening and closing

X
Take the mechanical key out of the Smart-
Key (Y page 82).
X Insert the mechanical key into the lock of
the driver's door as far as it will go. X
Turn the mechanical key clockwise as far as
it will go to position 0047.
X Turn the mechanical key back and remove
it.
X Make sure that the doors and the tailgate
are locked.
X Insert the mechanical key into the Smart-
Key.
i If you lock the vehicle as described above,
the fuel filler flap is not locked. The anti-
theft alarm system is not armed. Cargo compartment
Important safety notes
G
WARNING
If persons, particularly children are subjected to prolonged exposure to extreme heat or
cold, there is a risk of injury, possibly even
fatal. Never leave children unattended in the
vehicle. G
WARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. If the tailgate is open when the engine is running, particu-
larly if the vehicle is moving, exhaust fumes
could enter the passenger compartment.
There is a risk of poisoning. Turn off the engine before opening the tail-
gate. Never drive with the tailgate 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 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 tailgate swings upwards and to the
rear when opened. Therefore, make sure
that there is sufficient clearance above and
behind the tailgate.
i Tailgate opening dimensions
(Y page 456).
You should preferably place luggage or loads
in the cargo compartment. Observe the load- ing guidelines (Y page 334).
Do not leave the SmartKey in the cargo com- partment. You could otherwise lock yourself
out.
Vehicles without the EASY-PACK tailgate:
the tailgate can be:
R opened and closed manually from outside
R unlocked from inside with the emergency
release
For vehicles with the EASY-PACK tailgate you can:
R close the tailgate manually from outside
R open and close the tailgate automatically
from outside
R open and close the tailgate automatically
from inside
R unlock the tailgate from inside with the
emergency release
R limit the opening angle of the tailgate Cargo compartment
89Opening and closing Z

Tailgate reversing feature
On vehicles with tailgate remote closing fea-
ture, the tailgate is equipped with automatic
obstacle recognition with a reversing feature. If a solid object blocks or restricts the tailgate
when automatically opening or closing, this
procedure is stopped. If the tailgate is stop-
ped during the closing procedure, it will open
again automatically. The automatic obstacle
recognition with reversing function is only an aid. It is not a substitute for your attentive-
ness when opening and closing the tailgate. G
WARNING
The reversing feature does not react:
R to soft, light and thin objects, e.g. small fin-
gers
R over 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:
R press the 0054button on the SmartKey, or
R press the remote operating switch on the
driver’s door, or
R press the closing or locking button on the
tailgate, or
R pull the handle on the tailgate Opening and closing manually from
outside
Opening X
Press the 0036button on the SmartKey.
X Pull handle 0043.
X Raise the tailgate.
Vehicles with the EASY-PACK tailgate: if
you pull handle 0043and then release it, the
tailgate opens automatically.
Closing X
Pull the tailgate down using recess 0043.
X Allow the tailgate to drop into the lock.
X Lock the vehicle if necessary with the 0037
button on the SmartKey or with KEYLESS-
GO.
i If a KEYLESS-GO key is detected in the
cargo compartment, the tailgate will not
lock. 90
Cargo compartmentOpening and closing

Opening/closing automatically from
outside
Important safety notes G
WARNING
Parts of the body could become trapped dur-
ing automatic closing of the tailgate. 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 0054button on the SmartKey.
R press the remote operating switch on the
driver's door.
R press the closing or locking button on the
tailgate.
R pull the handle on the tailgate. G
WARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. If the tailgate is open when the engine is running, particu-
larly if the vehicle is moving, exhaust fumes
could enter the passenger compartment.
There is a risk of poisoning.
Turn off the engine before opening the tail-
gate. Never drive with the tailgate open.
! The tailgate swings upwards and to the
rear when opened. Therefore, make sure
that there is sufficient clearance above and behind the tailgate.
i Tailgate opening dimensions
(Y page 456).
i Notes on the reversing feature for the tail-
gate (Y page 90). Opening the tailgate automatically You can open the tailgate automatically with
the SmartKey or the handle in the tailgate.
X Press and hold the 0054button on the
SmartKey until the tailgate opens.
or X If the tailgate is unlocked, pull the handle
and let it go again immediately.
Closing the tailgate automatically G
WARNING
Parts of the body could become trapped dur-
ing automatic closing of the tailgate. 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 0054button on the SmartKey.
R press the remote operating switch on the
driver's door.
R press the closing or locking button on the
tailgate.
R pull the handle on the tailgate. Closing and locking button (example: vehicle with
EASY-PACK tailgate and KEYLESS-GO) Cargo compartment
91Opening and closing Z

X
To close: press closing button 0043on the
tailgate.
or X Press and hold the 0054button on the
SmartKey until the tailgate closes.
Vehicles with the EASY-PACK tailgate and
KEYLESS-GO: you can simultaneously close
and lock the tailgate. X Press locking button 0044on the tailgate.
If a KEYLESS-GO key is detected outside
the vehicle, the tailgate closes and locks.
All the doors must be shut and the Smart-
Key located in the vicinity of the tailgate.
i The tailgate cannot be opened and closed
with the SmartKey if there is a SmartKey in
the ignition.
If the tailgate touches an object while clos-
ing, the closing procedure is interrupted
and the tailgate reopens.
i If a KEYLESS-GO key is detected in the
cargo compartment, the tailgate will not
lock. Opening/closing automatically from
inside
Important safety notes G
WARNING
Parts of the body could become trapped dur-
ing automatic closing of the tailgate. 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 0054button on the SmartKey.
R press the remote operating switch on the
driver's door. R
press the closing or locking button on the
tailgate.
R pull the handle on the tailgate. G
WARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. If the tailgate is open when the engine is running, particu-
larly if the vehicle is moving, exhaust fumes
could enter the passenger compartment.
There is a risk of poisoning.
Turn off the engine before opening the tail-
gate. Never drive with the tailgate open.
! The tailgate swings upwards and to the
rear when opened. Therefore, make sure
that there is sufficient clearance above and behind the tailgate.
i Tailgate opening dimensions
(Y page 456).
i Notes on the reversing feature for the tail-
gate (Y page 90).
Opening and closing You can open and close the tailgate from the
driver's seat when the vehicle is stationary
and unlocked.
X To open: pull remote operating switch 0043
for the tailgate until the tailgate opens.
X To close: turn the SmartKey to position 1
or 2in the ignition lock.
X Press remote operating switch for tail-
gate 0043until the tailgate is closed. 92
Cargo compartmentOpening and closing