Page 24 of 209

22Keys, doors and windowsElectronic key system
Enables a handsfree operation of thefollowing functions:
● central locking system 3 23
● load compartment 3 31
● ignition switching on and starting the engine 3 114
The electronic key simply needs to be on the driver's person.
Notice
Always take the electronic key with
you when exiting the vehicle.
The electronic key being left in the
card reader is indicated by a warning
chime 3 90 and a message in the
Driver Information Centre (DIC)
3 90 when the driver's door is
opened.
Additionally, the electronic key
includes the functionality of the radio
remote control 3 20 and an entry
lighting function 3 100.
Handle with care, protect from
moisture and high temperatures and
avoid unnecessary operation.
Notice
Do not put the electronic key in the
load compartment during driving, as
this is outside of the detection zone
(indicated by a warning chime at low
speed 3 90 and a message in the
Driver Information Centre (DIC)
3 90).
Handsfree operation is automatically disabled when the electronic key
buttons have been operated or the
central locking switch e 3 23 is
pressed. To re-enable handsfree
operation, restart the engine.
Power button 3 114.Replacing battery in electronic
key
Replace the battery as soon as the
system no longer operates properly
or the range is reduced. The need for
battery replacement is indicated by a
message in the DIC 3 90.
Battery replacement, see Radio
remote control 3 20.
Fault
If the central locking system cannot
be operated or the engine cannot be
started, the cause may be one of the
following:
● fault in electronic key
● electronic key out of reception range
● battery voltage too low
● overload of the central locking system by operating at frequent
intervals, the power supply is
interrupted for a short time
● interference from higher-power radio waves from other sources
Page 25 of 209

Keys, doors and windows23Emergency manual key
Press and hold the release button on
the side of the electronic key and pull out the emergency manual key from
the top.
Manually lock or unlock the doors by turning the key in the lock.
After use, reinsert the emergency
manual key in the housing of the
electronic key.
Door locks
Anti-theft security lock
To prevent the front door from being
opened from the outside, open the
door and engage the anti-theft
security lock.
Using a suitable tool, turn the lock
switch on the door to the locked
position. The door cannot be opened
from outside.
The anti-theft security lock remains
engaged even after unlocking the
vehicle with the remote control. The
door can only be opened from inside
or by using the manual key.
To disengage, turn the switch to the
unlocked position.
Central locking system
Unlocks and locks the front doors,
sliding side doors and load
compartment.
With the 3-button remote control, the
front doors and load compartment/
sliding side doors (where fitted) can
be unlocked and locked separately.
For safety reasons, the vehicle
cannot be locked if the key is in the
ignition switch.
Notice
If no door is opened within approx. 2 minutes after the vehicle has been unlocked, the vehicle is re-locked
automatically.
Close doors and load compartment. If
the doors are not closed properly, the central locking system will not work.
Remote control operation Operation of central locking system
with the remote control is confirmed
by the hazard warning flashers.
Page 26 of 209
24Keys, doors and windowsUnlocking with 2-button remote
control
Depending on configuration:
● Press and hold c to unlock all
doors and the load compartment.
- or -
● Press c once to unlock the
driver's door, and press c twice to
unlock all doors and the load compartment.
Unlocking with 3-button remote
control
Depending on configuration:
● Press and hold c to unlock all
doors and the load compartment.
- or -
● Press c once to unlock the
driver's door, and press c twice to
unlock all doors and the load compartment.
Locking with 2-button remote control
Press e: All doors and the load
compartment are locked.
Locking with 3-button remote control
Page 27 of 209

Keys, doors and windows25Press e: All doors and the load
compartment are locked.
Notice
Where fitted, alarm monitoring of the
passenger compartment 3 33 is
switched off by pressing and holding e (which is confirmed by an audible
signal).
If this was done unintentionally,
unlock the doors again and press e
briefly to lock the vehicle.
Load compartment locking and
unlocking with 2-button remote
controlDepending on configuration, press c
once or twice to unlock the load compartment (and sliding side doors).
Press e to lock the load compartment
(and sliding side doors).
Load compartment locking and
unlocking with 3-button remote
control
Press G to lock or unlock load
compartment (and sliding side doors).
Electronic key system operation
For handsfree operation, the
electronic key must be outside the
vehicle, within a range of approx.
one metre of the front doors or load
compartment.
Notice
There is no button for handsfree
operation in the exterior door handle
of the sliding side door.
There must be no electronic key left
inside the vehicle and no additional
electronic key in the detection zones, or handsfree operation of the central
locking system will not work.
Operation of central locking system
with the electronic key is confirmed by
the hazard warning flashers.9 Danger
Never leave an electronic key
inside the vehicle when children or animals are left in the vehicle, to
avoid unintended operation of
windows, doors or engine. Risk of
fatal injury.
Page 28 of 209

26Keys, doors and windowsUnlocking with electronic key -
handsfree operation
Press the button on any exterior door
handle and pull the handle to open.
The vehicle only unlocks when at least 3 seconds have passed sincelocking using handsfree operation.
Handsfree operation is automatically disabled when the electronic keybuttons have been operated. To re-
enable handsfree operation, restart
the engine.
Unlocking with electronic key buttons
Press c to unlock all doors and the
load compartment.
Locking with electronic key -
handsfree operation
Press the button on any exterior door
handle. All doors and the load
compartment are locked.
The vehicle only locks when at least
3 seconds have passed since
unlocking using handsfree operation.
Handsfree operation is automatically
disabled when the electronic key
buttons have been operated. To re-
enable handsfree operation, restart
the engine.
Locking with electronic key buttons
Press e to lock all doors and the load
compartment.
Load compartment locking and
unlocking with electronic key -
handsfree operation
Press the button on the exterior door
handle to lock or unlock the rear
doors/tailgate (and sliding side doors)
Page 29 of 209

Keys, doors and windows27when the electronic key is within
range of the detection zone (approx.
one metre).
The rear doors/tailgate (and sliding side doors) only lock/unlock when at
least 3 seconds have passed since
the button was last pressed.
Handsfree operation is automatically
disabled when the electronic key
buttons have been operated. To re-
enable handsfree operation, restart
the engine.
Load compartment locking and
unlocking with electronic key buttonsPress G to lock/unlock the rear
doors/tailgate (and sliding side
doors).
Electronic key system 3 22.
Manual key operation
Manually lock or unlock the doors by
turning the key in the lock.
Central locking switch
Locks or unlocks the doors and load
compartment from the passenger
compartment.
Press e to lock the vehicle. Activation
is indicated by the LED in the button.
When closing any open door, the door is locked automatically.
Press e again to unlock the vehicle.
If the vehicle is driven with an open
load compartment, the front doors
(and sliding side doors) can still be
locked. With the ignition switched on,
press and hold e for approx.
5 seconds. When closing the rear doors/tailgate, they are locked
automatically.
Automatic locking 3 28.
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28Keys, doors and windowsHandsfree operation is automatically
disabled when e is pressed. To re-
enable handsfree operation, restart
the engine.
Electronic key system 3 22.
Slam door locks Certain models feature load
compartment locks which are isolated
for added security.
With slam door locks, while the doors can be locked and unlocked using the
remote control or electronic key, the
load compartment must be manually
opened by turning the key in the lock.
Rear doors 3 29.
Automatic locking Automatic locking after driving off This security feature can be
configured to automatically lock the
doors and load compartment as soon as the vehicle is driven.Activation
With the ignition switched on, press and hold e on the central locking
switch for approx. 5 seconds. An audible signal confirms activation.
Deactivation
With the ignition switched on, press and hold e on the central locking
switch for approx. 5 seconds. An audible signal confirms deactivation.
Central locking switch 3 23.
Child locksThe child safety lock for the sliding
side door is located on its rearward
facing edge.
To prevent the sliding side door from being opened from the inside, open
the door and engage the child lock.9 Warning
Use the child locks whenever
children are occupying the rear
seats, to prevent unintentional
opening from the inside.
Using a suitable tool, turn the child
lock switch in the sliding side door to
the locked position; the door cannot
be opened from the inside.
The child lock remains engaged even after unlocking the vehicle with the
remote control. The door can only be
opened from outside.
For deactivation, turn the child lock
switch to the unlocked position.
Page 31 of 209

Keys, doors and windows29Doors
Sliding door
Open and close the sliding side door
only when the vehicle is at a standstill
with the parking brake applied.
Pull the interior handle towards the
rear to unlock and open.
The door can be locked from inside
the vehicle with the interior lock
switch.
9 Warning
Take care when operating the
sliding side door. Risk of injury.
Ensure that nothing becomes
trapped during operation and no-
one is standing within the moving
area.
If the vehicle is parked on a slope,
open sliding doors may move
accidentally on account of their
weight.
Close the sliding doors before
driving off.
Rear doors
To open the left-hand rear door, pull
the outside handle. The door is
opened from inside the vehicle by
pulling the interior handle.
The right-hand rear door is released using the lever.
9 Warning
The rear lights may be obscured if
the rear doors are open and the
vehicle is parked on the roadside.
Make other road users aware of the vehicle, by using a warning
triangle or other equipment
specified in the road traffic
regulations.