Keys, doors and windows19Keys, doors and
windowsKeys, locks ................................... 19
Doors ........................................... 28
Vehicle security ............................ 32
Exterior mirrors ............................ 36
Interior mirrors ............................. 38
Windows ...................................... 38
Roof ............................................. 41Keys, locks
Keys Replacement keys
The key number is specified in the
Car Pass or on a detachable tag.
The key number must be quoted
when ordering replacement keys as it
is a component of the immobiliser
system.
Locks 3 257, Radio remote control
3 20, Electronic key 3 21, Central
locking 3 22, Starting the engine
3 150.
Lock cylinders
Designed to free-wheel if they are forcefully rotated without the correct
key or if the correct key is not fully
inserted. To reset, turn cylinder with
the correct key until its slot is vertical, remove key and then re-insert it. If the
cylinder still free-wheels, turn the key through 180° and repeat operation.Key with foldaway key section
Press button to extend. To fold the
key, first press the button.
Car Pass The Car Pass contains security
related vehicle data and should
therefore be kept in a safe place.
When the vehicle is taken to a
workshop, this vehicle data is needed
in order to perform certain operations.
Keys, doors and windows21
FaultIf the central locking system cannot
be operated with the radio remote
control, the cause may be one of the
following:
■ Fault in radio remote control
■ Range exceeded
■ Battery voltage too low
■ Frequent, repeated operation of the
radio remote control while not in
range, which will require re-
synchronisation
■ 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
Manual unlocking 3 22.Electronic key system
Enables a keyless operation of the
following functions:
■ Central locking system 3 22
■ Tailgate 3 28
■ Ignition switching on and starting the engine 3 150
The electronic key simply needs to be on the driver's person.
Additionally the electronic key
includes the functionality of the radio
remote control 3 20.
Handle with care, protect from
moisture and high temperatures and
avoid unnecessary operation.
Notice
Do not put the electronic key in the
load compartment or in front of the
Info-Display.
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 Driver Information
Centre 3 115.
Battery replacement, see radio
remote control 3 20.
Electronic key synchronisation The electronic key synchronises itselfautomatically during every starting
procedure.
22Keys, doors and windows
FaultIf the central locking 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.
To rectify the cause of the fault,
change the position of the electronic
key.
Manual unlocking 3 22.
Memorised settings Whenever the ignition is switched off,
the following settings are
automatically memorised by the
remote control unit or the electronic
key:■ Automatic climate control
■ Lighting
■ Infotainment system
■ Central locking system
■ Sport mode settings
■ Comfort settings
The saved settings are automatically
used the next time the ignition is
switched on with the memorised key
with remote control unit 3 148 or
electronic key 3 21.
A precondition is that Personalisation
by Driver is activated in the personal
settings of the Info-Display. This must
be set for each remote control unit or
electronic key which is used.
Also memorised are the adjustments
of the driver's seat and exterior
mirrors, independent of the memory
positions 3 49.
Power seat automatically moves into
the saved position when unlocking
and opening the driver's door with the
memorised remote control or
electronic key and Auto Memory
Recall in the Info-Display is activated.Vehicle personalisation 3 117.
Central locking system
Unlocks and locks doors, load
compartment and fuel filler flap.
A pull on an interior door handle
unlocks the respective door. Pulling
the handle once more opens the door.
Notice
In the event of an accident in which
airbags or belt pretensioners are
deployed, the vehicle is
automatically unlocked.
Notice
A short time after unlocking with the
remote control the doors are locked
automatically if no door has been
opened.
Keys, doors and windows29
Power tailgate9Warning
Take care when operating the
power tailgate. Risk of injury,
particularly to children.
Keep a close watch on the
movable tailgate when operating.
Ensure that nothing becomes
trapped during operating and no
one is standing within the moving
area.
The power tailgate is operated by:
■ Radio remote control button x
■ Switch G in the door panel of the
driver's door
■ Touchpad switch and button G in
the tailgate.
On vehicles with automatic
transmission, the tailgate can only be
operated when the vehicle is
stationary and automatic
transmission in P.
The tail lights flash and a chime
sounds when the power tailgate is
operating.
Notice
Operating the power tailgate does
not operate the central locking
system. To open the tailgate with the remote control, it is not necessary to unlock the vehicle. Unlock the
vehicle first when operating with the
touchpad switch or the switch in the
driver's door. Lock the vehicle after
closing.
Central locking system 3 22.
Operation with radio remote controlPress and hold button x until the
tailgate starts to open or close.
Operation with the switch in the
driver's door
Press and hold button G until the
tailgate starts to open or close.
30Keys, doors and windows
Operation with switches in the tailgate
To open the tailgate, press the
touchpad switch under the tailgate
moulding until the tailgate starts to
move.
To close, press button G in the
open tailgate until the tailgate starts to
move.
Stop or change direction of
movement
Pressing button x on radio remote
control or G on the tailgate or press
on the touchpad switch whilst the
tailgate is moving will stop the tailgate
in the current position. Pressing
button x or G again will reverse
the direction of movement.
Operation modes
The power tailgate has three modes
of operation, which are controlled by
the switch in the driver's door. To
change the mode, turn the switch:
■ Normal mode MAX: power tailgate
opens to full height
■ Intermediate mode 3/4: power
tailgate opens to a reduced height
that can be adjusted
■ Mode Off: tailgate can only be
operated manually.
Keys, doors and windows35
AlarmWhen triggered, the alarm sounds via a separate battery-backed power
sounder, and the hazard warning
lights flash simultaneously. The
number and duration of alarm signals
are stipulated by legislation.
The anti-theft alarm system can be
deactivated only by pressing the
button c or by pressing the switch on
the door handle (electronic key
system) or switching on the ignition.
A triggered alarm, which has not been interrupted by the driver, will be
indicated by the hazard warning
lights. They will flash quickly three
times when the vehicle is unlocked
next time with the radio remote
control. Additionally a warning
message is displayed in the Driver
Information Centre after switching on
the ignition.
Vehicle messages 3 115.
If the vehicle's battery is to be
disconnected (e.g. for maintenance
work), the alarm siren must be
deactivated as follows: switch theignition on then off, then disconnect
the vehicle's battery within
15 seconds.
Immobiliser The system is part of the ignition
switch and checks whether the
vehicle is allowed to be started with
the key being used.
The immobiliser is activated
automatically after the key is removed
from the ignition switch.
If control indicator d flashes when the
ignition is on, there is a fault in the
system; the engine cannot be started. Switch off the ignition and repeat start
attempt.
If control indicator d continues
flashing, attempt to start the engine
using the spare key and seek the
assistance of a workshop.
Notice
The immobiliser does not lock the
doors. You should always lock the
vehicle after leaving it and switch on the anti-theft alarm system 3 22,
3 33.Control indicator d 3 104.
40Keys, doors and windows
Child safety system for rearwindows
Press switch z to deactivate rear
door power windows; the LED
illuminates. To activate, press z
again.
Comfort operating with the
remote control The windows can be operated
remotely from outside the vehicle.
Press button c again for
three seconds after unlocking: all
windows will be opened.
Press button e again for
three seconds after locking: all
windows will be closed.
Press any button to stop window
movement.
Folding mirrors 3 36.
Closing sunroof 3 41.
Confirmation
Complete opening or closing of the
windows is confirmed by the hazard
warning flashers.
Overload
If the windows are repeatedly
operated within short intervals, the
window operation is disabled for
some time.
Initialising the power windowsIf the windows cannot be closed
automatically (e.g. after
disconnecting the vehicle battery), a
warning message is displayed in the
Driver Information Centre.
Vehicle messages 3 115.
Activate the window electronics for
each window as following:
1. Close doors.
2. Switch on ignition.
3. Pull switch to the second detent until the window starts to close
and hold pulled for additional
4 seconds.
4. Push switch to the second detent until the window starts to open
automatically.
5. Repeat for each window.
116Instruments and controls
■ Ride control systems
■ Driver assistance systems
■ Cruise control
■ Speed limiter
■ Adaptive cruise control
■ Forward collision alert
■ Collision imminent braking system
■ Parking assist systems
■ Lighting, bulb replacement
■ Adaptive forward lighting
■ Wiper/washer system
■ Doors, windows
■ Side blind spot alert
■ Traffic sign assistant
■ Lane departure warning
■ Load compartment, boot lid
■ Radio remote control
■ Electronic key system
■ Keyless starting
■ Seat belts
■ Airbag systems
■ Engine and transmission
■ Tyre pressure■ Diesel particle filter
■ Vehicle battery status
Messages in the
Colour-Info-Display
Some important messages may
appear additionally in the
Colour-Info-Display. Press the
multifunction knob to confirm a
message. Some messages only pop
up for a few seconds.
Warning chimes
When starting the engine or
whilst driving
Only one warning chime will sound at a time.
The warning chime regarding not
fastened seat belts has priority over
any other warning chime.
■ If seat belt is not fastened.
■ If a door or the tailgate is not fully closed when starting off.
■ If a certain speed is exceeded with parking brake applied.■ If adaptive cruise controldeactivates automatically.
■ If approaching a vehicle ahead too closely.
■ If a programmed speed or speed limit is exceeded.
■ If a warning message appears in the Driver Information Centre.
■ If the electronic key is not in the passenger compartment.
■ If the parking assist detects an object.
■ If an unintended lane change occurs.
■ If the diesel particle filter has reached the maximum filling level.
When the vehicle is parked and/ or the driver's door is opened ■ When the key is in the ignition switch.
■ With exterior lights on.
■ If the trailer hitch is not engaged.