2012 MERCEDES-BENZ E-CLASS ESTATE lock

Useful information
i This Owner's Manual describes all mod-
els, series and optional equipment for your
vehicle that were available at the time of
going to press. National variations are pos-
sible. Note that your vehicle may not be
equipped with all of the functions descri-
bed. This is also the case for systems and
functions relevant to safety.
i Read the information on qualified special-
ist workshops: (Y page 25). Key
Important safety notes
G
WARNING
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.
Therefore, do not leave any people behind in
the vehicle, particularly children, elderly peo-
ple or people requiring special assistance. 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. The doors can then be
opened from the inside after the vehicle has
been locked from the outside. G
WARNING
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. G
WARNING
If a key ring is too heavy or too large, the
weight acting on the key could cause it to turn
in the ignition lock or catch on the steering
wheel. This could cause the engine to be
switched off suddenly. You may lose control
of the vehicle and cause an accident. Do not
attach any heavy or large key rings to the key
that is inserted in the ignition.
R Do not keep the key:
-with electronic devices, e.g. a mobile
phone or another key
- with metallic objects, e.g. coins or metal
foil
- inside metallic objects, e.g. a metal case
This can affect the key's functionality.
Keep the key away from strong magnetic
fields. Otherwise, the remote control function
could be affected. 82
KeyOpening and closing

Key functions
:
& To loc kthe vehicle
; F To unlock the boot lid/tailgate
= % To unlock the vehicle
X To unlock centrally: press the%but-
ton.
If you do not open the vehicle within
approximately 40 seconds of unlocking:
R the vehicle is locked again.
R the anti-theft system is primed again.
X To lock centrally: press the&button.
The key centrally locks/unlocks:
R the doors
R the boot lid/tailgate
R the fuel filler flap
When unlocking, the turn signals flash once.
When locking, they flash three times.
You can also set an audible signal to confirm
that the vehicle has been locked. The audible
signal can be activated and deactivated using
the on-board computer (Y page 262).
When it is dark, the surround lighting also
comes on if it is activated in the on-board
computer (Y page 260). KEYLESS-GO
General notes Bear in mind that the engine can be started
by any of the vehicle occupants if there is a
KEYLESS-GO key in the vehicle. Locking and unlocking centrally You can start, lock or unlock the vehicle using
KEYLESS-GO. To do this, you only need carry
the key with you. When you touch the surface
of the sensors on the vehicle's outside door
handles, KEYLESS-GO establishes a radio
connection between the vehicle and the key.
When the engine is started and whilst you are
driving, KEYLESS-GO also checks whether a
valid key is in the vehicle by periodically
establishing radio contact.
You can combine the KEYLESS-GO functions
with those of a conventional key, e.g. using
KEYLESS-GO to unlock and pressing the
&
button to lock.
When locking or unlocking with KEYLESS-GO,
the distance between the key and the corre-
sponding door handle must not be greater
than 1 m. X
To unlock the vehicle: touch the inner
surface of the door handle.
X To lock the vehicle: touch sensor sur-
face :.
X Convenience closing feature: touch
recessed sensor surface ;for an exten-
ded period.
X To unlock the boot lid/tailgate: pull the
handle on the boot lid/tailgate.
Further information on the convenience clos-
ing feature (Y page 97). Key
83Opening and closing Z

Changing the settings of the locking
system
You can change the settings of the locking
system. This means that only the driver's door
and the fuel fille rflap are unlocked when the
vehicle is unlocked. This is useful if you fre-
quently travel on your own.
X To change the setting: press and hold
down the %and& buttons on the
key simultaneously for approximately six
seconds until the battery chec klamp
flashes twice ( Ypage 85).
i If the setting of the locking system is
changed within the signal range of the vehi-
cle, pressing the &or% button:
R locks or
R unlocks the vehicle
The key now functions as follows:
X To unlock the driver's door: press the
% button once.
X To unlock centrally: press the%but-
ton twice.
X To lock centrally: press the&button.
The KEYLESS-GO function is changed as fol-
lows:
X To unlock the driver's door: touch the
inner surface of the door handle on the
driver's door.
X To unlock centrally: touch the inner sur-
face of the door handle on the front-
passenger door or the rear door.
X To lock centrally: touch the outer sensor
surface on one of the door handles.
X To restore the factory settings: press
and hold down the %and& buttons
simultaneously for approximately six sec-
onds until the battery check lamp flashes
twice (Y page 85). Emergency key element
General notes If the vehicle can no longer be locked or
unlocked with the key, use the emergency
key element.
If you use the emergenc
ykey element to
unlock and open the driver's door or the boot
lid/tailgate, the anti-thef talarm system will
be triggered (Y page 78).
There are several ways to tur noff the alarm:
X To turn the alarm off with the key: press
the % or& button on the key.
or
X Insert the key into the ignition lock.
or
X To deactivate the alarm with KEYLESS-
GO: press the Start/Stop button in the igni-
tion lock. The key must be in the vehicle.
or
X Lock or unlock the vehicle using KEYLESS-
GO. The key must be outside the vehicle.
If you unlock the vehicle using the emergency
key element, the fuel filler flap will not be
unlocked automatically.
X To unlock the fuel filler flap: insert the
key into the ignition lock.
Removing the emergency key element :
Release catch
; Emergency key element 84
KeyOpening and closing

X
Push release catch :in the direction of
the arrow and at the same time, remove
emergency key element ;from the key. Battery of the key
Important safety notes G
WARNING
Batteries are toxic and contain caustic sub-
stances. For this reason, keep batteries out of
the reach of children.
If a battery has been swallowed, visit a doctor
immediately. H
Environmental note Batteries contain pollutants.
It is illegal to dispose of them
with the household rubbish.
They must be collected sep-
arately and disposed of in an
environmentally responsible
recycling system.
Dispose of batteries in an
environmentally responsible
manner
.Take discharged
batteries to a qualified spe-
cialis tworkshop or to a col-
lection point for used batter-
ies.
Mercedes-Benz recommends that you have
the batteries replaced at a qualified specialist
workshop. Checking the battery X
Press the &or% button.
The battery is working properly if battery
check lamp :lights up briefly.
The battery is discharged if battery check
lamp :does not light up briefly.
X Change the battery (Y page 85).
i If the key battery is checked within the
signal reception range of the vehicle, press-
ing the &or% button:
R locks or
R unlocks the vehicle
i You can get a battery in any qualified spe-
cialist workshop.
Replacing the battery You require a CR 2025 3 V cell battery.
X
Take the emergency key element out of the
key (Y page 84). :
Battery compartment cover
; Emergency key element Key
85Opening and closing Z

Problems with the key
Problem Possible causes/consequences and
M Solutions
You cannot lock or
unlock the vehicle
using the key. The key battery is discharged or nearly discharged.
X
Try again to lock/unlock the vehicle using the remote control
function of the key. Point the tip of the key at the driver's door
handle from close range and press the %or& button.
If this does not work:
X Check the key battery (Y page 85) and replace it if necessary
(Y page 85).
X Lock (Y page 90) or unlock (Y page 90) the vehicle using
the emergency key element. The key is faulty.
X
Lock (Y page 90) or unlock (Y page 90) 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 is in standby mode because the vehicle has not been
unlocked for an extended period.
X
Pull the door handle and then turn the key to position 2in the
ignition lock. There is interference from a powerful source of radio waves.
X Lock/unlock the vehicle using the remote control function of
the key. Point the tip of the key at the driver's door handle from
close range and press the %/& button. There is a fault with KEYLESS-GO.
X
Lock/unlock the vehicle using the remote control function of
the key. Point the tip of the key at the driver's door handle from
close range and press the %/& button.
X Have KEYLESS-GO checked at a qualified specialist workshop.
If this does not work:
X Check the key battery (Y page 85) and replace it if necessary
(Y page 85).
X Lock (Y page 90) or unlock (Y page 90) the vehicle using
the emergency key element. You have lost a key. X
Have the key deactivated at a qualified specialist workshop.
X Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. Key
87Opening and closing Z

Problem Possible causes/consequences and
M Solutions
You have lost the emer-
gency key element. X
Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. 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 369).
or
X Jump-start the vehicle (Y page 370).
or
X Consult a qualified specialist workshop. Only vehicles without a
DIRECT SELECT lever:
The engine cannot be
started using the key. The steering lock is mechanically blocked.
X
Remove the key and reinsert it into the ignition lock. While doing
this, turn the steering wheel in both directions. 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
WARNING
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.
Therefore, do not leave any people behind in
the vehicle, particularly children, elderly peo-
ple or people requiring special assistance. 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. The doors can then be
opened from the inside after the vehicle has
been locked from the outside.
G
WARNING
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 88
DoorsOpening and closing

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. 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. If the vehi-
cle 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 78).
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. Deactivate the
interior motion sensor (Y page 79) before you
lock the vehicle. The doors can then be
opened from the inside after the vehicle 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 78).
You can only open the rear doors from inside
the vehicle if they are not secured by the
child-proof locks (Y page 69).X
Pull door handle ;.
If the door is locked, locking knob :pops
up. The 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. X
To unlock: press button :.
X To lock: press button ;.
If all the doors are closed, the vehicle locks.
You cannot unlock the vehicle centrally from
the inside if the vehicle has been locked with
the key or KEYLESS-GO.
The central locking/unlocking button does
not lock or unlock the fuel filler flap.
For all countries except the United King-
dom: you can open a front door from inside
the vehicle even if it has been locked.
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. Deactivate the
interior motion sensor (Y page 79) before you
lock the vehicle. The doors can then be
opened from the inside after the vehicle has
been locked from the outside.
If the vehicle has been locked using the lock-
ing button for the central locking, or has been
locked automatically, and adoor 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 from
the inside is unlocked if only the driver's
door had been previously unlocked. Doors
89Opening and closing Z

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 th etwo buttons and
do not hear a tone, the relevant setting has
already been selected.
The vehicle is locked automatically when the
ignitio nis 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 being tested on a dynamom-
eter.
You can also switch the automatic locking
function on and off using the on-board com-
puter (Y page 261). Unlocking the driver's door (emer-
gencyk
ey element)
If the vehicle can no longer be unlocked with
the key, use the emergency key element.
X Take the emergency key element out of the
key (Y page 84).
X Inser tthe emergency key element into the
lock of the driver's door as far as it will go. 1
To unlock
X Turn the emergency key element anti-
clockwise to position 1.
The door is unlocked.
i On right-hand-drive vehicles, turn the
emergency key element clockwise.
X Turn the emergency key element back and
remove it.
X Insert the emergency key element into the
key.
If you use the emergency key element to
unlock and open the driver's door, the anti-
theft alarm system will be triggered
(Y page 78). Locking the vehicle (emergency key
element)
If the vehicle can no longer be locked with the
key, use the emergency key element.
X Open the driver's door.
X Close the front-passenger door, the rear
doors and the boot lid/tailgate.
X Press the locking button (Y page 89).
X Check whether the locking knobs on the
front-passenger door and the rear doors
are still visible. Press down the locking
knobs manually, if necessary (Y page 89).
X Close the driver's door.
X Take the emergency key element out of the
key (Y page 84).
X Insert the emergency key element into the
lock of the driver's door as far as it will go. 90
DoorsOpening and closing