Problem Possible causes/consequences and
M Solutions
The engine cannot be
started using the key. 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 290).
or
X Jump-start the vehicle (Y page 294).
or
X Consult a qualified specialist workshop. The engine cannot be
started using KEYLESS-
GO. The key is in the
vehicle. Ad
oor is open. Therefore, the key 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 key in the ignition lock. Doors
Important safety notes
G
Risk of injury
Only for the United Kingdom: if the vehicle
has been locked with the key, the double lock
function is activated as standard. It is then not
possible to open the doors from inside the
vehicle.
Therefore, do not leave any people behind in
the vehicle, particularly children, elderly peo-
ple or people requiring special assistance, if
the vehicle has been locked with the key. As
a result, they may not be able to free them-
selves in the event of an emergency. They
could be seriously or even fatally injured by
prolonged exposure to extremely high or low
temperatures, for example. In this case, res-
cuing people from outside the vehicle is diffi-
cult.
Deactivate the interior motion sensor before
you lock the vehicle with the key. The doors
can then be opened from the inside after the vehicle has been locked from the outside with
the key.
If the vehicle has been locked with KEYLESS-
GO, the doors can be opened from inside the
vehicle.
G
Risk of accident
If children are left unsupervised in the vehicle,
they could:
R open a door from inside the vehicle at any
time, even if it has been locked
R start the vehicle using akey which has been
left in the vehicle
R release the parking brake
They could thereby endanger themselves and
others. Never leave children unsupervised in
the vehicle. Always take the key with you
when leaving the vehicle, even if you are only
leaving it for a short time. Doors
73Opening and closing Z
Unlocking and opening the doors
from the inside
For all countries except the United King-
dom: you can open a door from inside the
vehicle even if it has been locked.
Only for the United Kingdom: if the vehicle
has been locked with the key, the double lock
function is activated as standard. It is then
not possible to open the doors from inside the
vehicle. Deactivate the interior motion sensor
(Y page 64) before you lock the vehicle with
the key. The doors can only be opened from
the inside after the vehicle has been locked
from the outside with the key.
You can only open the rear doors from inside
the vehicle if they are not secured by the
child-proof locks (Y page 55).X
Pull door handle ;.
If the door is locked, locking knob :pops
up. The door is unlocked and can be
opened. Locking and unlocking the vehicle
from the inside
You can centrally lock or unlock the vehicle
from the inside. This feature may be useful if,
for example, you wish to unlock the front-
passenger door from the inside or lock the
vehicle before you pull away.
The central locking/unlocking button does
not lock or unlock the fuel filler flap. i
You cannot unlock the vehicle centrally
from the inside if the vehicle has been
locked with the key or KEYLESS-GO. X
To lock: press button ;.
X To unlock: press button :. Automatic locking feature
The vehicle is locked automatically when the
ignition is switched on and the wheels begin
to turn. Therefore, there is a risk of being
locked out when the vehicle is being pushed,
towed or tested on a dynamometer. 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.
You can also switch the automatic locking
function on and off using the on-board com-
puter (Y page 209). 74
DoorsOpening and closing
R
opened and closed automatically from out-
side
R opened automatically from inside
R unlocked with the emergenc ykey element Opening/closing manually
Opening You can only open the boot lid after unlocking
it first.
X Press the %button on the key. X
Pull handle :.
X Raise the boot lid.
Closing G
Risk of injury
Make sure that nobody can become trapped
when closing the boot lid. X
Pull the boot lid down using recess :.
X Lock the vehicle if necessary with
the & button on the key or with KEY-
LESS-GO (Y page 69). Opening/closing automatically from
outside
Important safety notes G
Risk of injury
Only for the United Kingdom: if the vehicle
has been locked with the key, the double lock
function is activated as standard. It is then not
possible to open the doors from inside the
vehicle.
Therefore, do not leave any people behind in
the vehicle, particularly children, elderly peo-
ple or people requiring special assistance, if
the vehicle has been locked with the key. As
a result, they may not be able to free them-
selves in the event of an emergency. They
could be seriously or even fatally injured by
prolonged exposure to extremely high or low
temperatures, for example. In this case, res-
cuing people from outside the vehicle is diffi-
cult.
Deactivate the interior motion sensor before
you lock the vehicle with the key. The doors
can then be opened from the inside after the
vehicle has been locked from the outside with
the key.
If the vehicle has been locked with KEYLESS-
GO, the doors can be opened from inside the
vehicle. G
Risk of injury
Monitor the boot lid opening and closing pro-
cedures to make sure that nobody can
become trapped. To stop the opening or clos-
ing procedure, press the closing button on the
boot lid again or pull the handle on the outside
of the boot lid. 76
BootOpening and closing
X
Turn the emergency key element anti-
clockwise as far as it will go to position
1.
The boot is unlocked.
X Turn the emergency key element back and
remove it.
X Insert the emergency key element into the
key. Side windows
Important safety notes
G
Risk of injury
Make sure that nobody can become trapped
between the side window and the door frame
when a side window is opened. Do not touch
or lean against the side window during the
opening procedure. You could become trap-
ped between the side window and the door
frame as the side window moves down. If
there is a risk of becoming trapped, release
the switch or pull the switch upwards to close
the side window again. G
Risk of injury
Make sure that nobody can become trapped
as you close a side window. If there is a risk
of becoming trapped, release the switch or
press it again to open the side window again. G
Risk of injury
Children may injure themselves if they open
or close the side windows.
Never leave children unsupervised in the vehi-
cle. Always take the key with you when leaving
the vehicle, even if you are only leaving it for
a short time. G
Risk of injury
Do not leave children unsupervised in the
vehicle, even if they are secured in a child
restraint system. The children could:
R be seriously or even fatally injured on parts
of the vehicle
R be seriously or even fatally injured by pro-
longed exposure to extremely high or
extremely low temperatures
If children open a door, they could:
R seriously or even fatally injure other people
R get out of the vehicle and injure them-
selves, or be seriously or even fatally
injured by a passing vehicle
Activate the child-proof locks/override fea-
ture if children are travelling in the vehicle.
They could otherwise open doors or side win-
dows while the vehicle is in motion and
thereby injure themselves or others. Opening and closing the side win-
dows
:
Front left
; Front right
= Rear right
? Rear left
The switches for all side windows are located
on the driver's door. There is also a switch on
each door for the corresponding side window. 78
Side windowsOpening and closing
X
Touch sensor surface :on the door han-
dle until the side windows and the sliding
sunroof are fully closed.
i Make sure you only touch sensor sur-
face :.
X Make sure that all the side windows and the
sliding sunroof are closed. Resetting the side windows
You must reset each side window if a side
window can no longer be closed fully.
X Turn the key to position 2in the ignition
lock.
X Pull the corresponding switch on the door
control panel until the side window is com-
pletely closed. (Y page 78)
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 78).
X Hold the switch for an additional second.
X If the corresponding side window remains
closed after the button has been released,
the side window has been reset correctly.
If this is not the case, repeat the steps
above again. Problems with the side windows
Problem: aside window cannot be closed
because an object is obstructing the side
window.
X Remove the object(s).
X Close the side window.
Problem :aside window cannot be closed,
and you cannot see the cause. G
Risk of injury
Closing the side windows with increased force
or without the anti-entrapment feature could
lead to serious or even fatal injury. Make sure that nobody can become trapped when clos-
ing the side windows.
If a side window is obstructed during closing
and reopens again slightly:
X Immediately afte rthe window blocks, pull
the corresponding switch again until the
side window has closed.
The side window is closed with increased
force.
If a side window is obstructed again during
closing and reopens again slightly:
X Immediately after the window blocks, pull
the corresponding switch again until the
side window has closed.
The side window is closed without the anti-
entrapment feature. Sliding sunroof
Important safety notes
G
Risk of injury
Make sure that nobody can become trapped
when closing the sliding sunroof. If there is a
risk of entrapment, release the switch and
push it briefly in any direction to stop the slid-
ing sunroof. G
Risk of injury
Children could injure themselves if they oper-
ate the sliding sunroof.
Never leave children unsupervised in the vehi-
cle. Always take the key with you when leaving
the vehicle, even if you are only leaving it for
a short time. G
Risk of injury
The glass in the panorama sunroof could
break in an accident. If you are not wearing a
seat belt, there is a risk that you could be
thrown through the opening in the event of the
vehicle overturning. Therefore, always wear a
seat belt to reduce the risk of injuries. 80
Sliding sunroofOpening and closing
Seats
Important safety notes
G
Risk of injury
The seats can still be adjusted when there is
no key in the ignition lock. For this reason,
children should never be left unsupervised in
the vehicle. They could adjust the seats and
become trapped. G
Risk of accident
Only adjust the driver's seat when the vehicle
is stationary. You will otherwise be distracted
from the road and traffic conditions and you
could lose control of the vehicle as a result of
the seat moving. This could cause an acci-
dent. G
Risk of injury
Make sure that nobody can become trapped
when adjusting the seats.
Observe the notes on airbags.
Secure children as recommended; see the
"Children in the vehicle" section. G
Risk of injury
Make sure that the back of your head is sup-
ported at eye level by the central area of the
head restraint .Ifyour head is not supported
correctly by the head restraint, you could suf-
fer a severe neck injury in the event of an
accident .Never drive if the head restraints are
not engaged and set correctly. G
Risk of injury
Occupants should only travel sitting on seats
which have the head restraints fitted. On a
seat which is occupied, move the head
restraint into the upright position .This
reduces the risk of injury to the passenger in
the event of an accident. !
To avoid damage to the seats and the seat
heating, observe the following information:
R do not spill any liquids on the seats. If
liquid is spilled on the seats, dry them as
soon as possible.
R if the seat covers are damp or wet, do not
switch on the seat heating. The seat
heating should also not to be used to dry
the seats.
R clean the seat covers as recommended;
see the "Interior care" section.
R do not transport heavy loads on the
seats. Do not place sharp objects on the
seat cushions, e.g. knives, nails or tools.
The seats should only be occupied by
passengers, if possible.
R when the seat heating is in operation, do
not cover the seats with insulating mate-
rials, e.g. blankets, coats, bags, seat cov-
ers, child seats or booster seats.
! When you move the seats, make sure that
there are no objects in the footwell or
behind the seats. Otherwise, you could
damage the seats and the objects.
i The head restraints in the front seats are
fitted with the NECK-PRO system
(Y page 41). For this reason, it is not pos-
sible to remove the head restraints from
the front seats.
Please contact a Mercedes-Benz Service
Centre for more information.
i Related topics:
R Through-loading feature, rear bench seat Seats
85Seats, steering wheel and mirrors Z
The system automatically switches down
from level
2to level 1after approximately ten
minutes.
The system automatically switches off
approximately 20 minutes after it is set to
level 1.
X Make sure that the key is in position 1or
2 in the ignition lock.
X To switch on: press button:repeatedly
until the desired heating level is set.
X To switch off: press button:repeatedly
until all the indicator lamps go out.
Problems with the seat heating The seat heating has switched off prema-
turely or cannot be switched on. The vehicle's
electrical system voltage is too low because
too many electrical consumers are switched
on.
X
Switch off electrical consumers which you
do not need, such as the rear window heat-
ing or interior lighting. Switching the seat ventilation on/off
Activating/deactivating The three blue indicator lamps in the buttons
indicate the ventilation level you have selec-
ted.
i
If the battery voltage is too low, the seat
ventilation may switch off. X
Make sure that the key is in position 1or
2 in the ignition lock.
X To switch on: press button:repeatedly
until the desired ventilation level is set.
i You can open the side windows and the
sliding sunroof with the key (Y page 79).
The seat ventilation of the driver's seat
automatically switches to the highest level.
X To switch off: press button:repeatedly
until all the indicator lamps go out.
Problems with the seat ventilation The seat ventilation has switched off prema-
turely or cannot be switched on. The vehicle's
electrical system voltage is too low because
too many electrical consumers are switched
on.
X Switch off electrical consumers which you
do not need, such as the rear window heat-
ing or interior lighting. Steering wheel
Important safety notes
G
Risk of injury
The electrically adjustable steering wheel can
still be adjusted when there is no key in the
ignition lock. Therefore, do not leave children
unsupervised in the vehicle, as they could
become trapped if the steering wheel is adjus-
ted. G
Risk of accident
Only adjust the steering wheel when the vehi-
cle is stationary and do not pull away until the
steering wheel adjustmen tmechanism is
locked in position .You might otherwise drive
without the steering wheel adjustmen tmech-
anism being locked in position .As a result,
you could be distracted from road and traffic
conditions by an unintentional movement of
the steering wheel and thereby cause an acci-
dent. 90
Steering wheelSeats, steering wheel and mirrors
Problems with the steering wheel heat-
ing
If the steering wheel heating indicator lamp
on the lower left lever of the steering column
is flashing, the steering wheel heating has
switched off automatically. The vehicle's
electrical system voltage is too low because
too many electrical consumers are switched
on.
X
Switch off electrical consumers which you
do not need, such as the rear window heat-
ing or interior lighting.
Once the battery is sufficiently charged, the
steering wheel heating will switch back on
automatically. EASY-ENTRY/EXIT system
G
Risk of injury
Make sure that nobody can become trapped
when you activate the EASY-ENTRY/EXIT fea-
ture.
If there is a risk of someone becoming trap-
ped, stop the adjustment procedure. To halt
the procedure:
R move the switch for steering wheel adjust-
ment in the opposite direction to that in
which the steering wheel is moving.
R press one of the memory function position
buttons.
Never leave children unsupervised in the vehi-
cle. They could open the driver's door and
thereby unintentionally activate the EASY-
ENTRY/EXIT feature and become trapped.
The EASY-ENTRY/EXIT feature makes getting
in and out of your vehicle easier.
The steering wheel swings upwards when
you:
R remove the key from the ignition lock
R open the driver's door and KEYLESS-GO is
in position 1
R open the driver's door and the key is in
position 0or 1in the ignition lock i
The steering wheel only moves upwards if
it has not already reached the upper end
stop.
If you insert the key into the ignition lock with
the driver's door closed, the steering wheel is
automatically moved to the previously set
position.
The last position of the steering wheel is
stored after each manual setting or when you
store the setting with the memory function
(Y page 95).
You can activate and deactivate the EASY-
ENTRY/EXIT feature in the on-board com-
puter (Y page 211).
i If the crash-responsive EASY-EXIT feature
is triggered in an accident, the steering col-
umn will move upwards when the driver's
door is opened. This occurs irrespective of
the position of the key in the ignition lock.
This makes it easier to exit the vehicle and
rescue the occupants.
The crash-responsive EASY-EXIT feature is
only operational after an accident if the
EASY-EXIT/ENTRY feature is activated in
the on-board computer. Mirrors
Rear-view mirror
Rear-view mirror (manual anti-dazzle) X
Anti-dazzle mode: flick anti-dazzle
switch :forwards or back. 92
MirrorsSeats, steering wheel and mirrors