20Keys, doors and windowsKey with foldaway key section
Press button to extend. To fold the
key, first press the button.
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 then re-insert it. If the
cylinder still free-wheels, turn the key
through 180° and repeat operation.
Radio remote control
Enables operation of the following
functions via the use of the remote control buttons:
● central locking system 3 23
● anti-theft locking system 3 30
● anti-theft alarm system 3 30
● power windows 3 36
● sunroof 3 38
The remote control has a range of up
to 100 metres , but may also be much
less due to external influences. The
hazard warning flashers confirm
operation.
Handle with care, protect from
moisture and high temperatures and
avoid unnecessary operation.
Replacing battery in radio remote
control
Replace the battery as soon as the
range reduces.
Batteries do not belong in household
waste. They must be disposed of at
an appropriate recycling collection
point.
Keys, doors and windows21
1.Insert flat screwdriver into the slot
and separate the back cover from the remote control by slightly
turning the screwdriver.
2. Remove and replace battery. Use
CR 2032 or equivalent battery.
Pay attention to the installation
position.
3. Insert the back cover in the area of the key blade, fold down and
close.
Radio remote control
synchronisation
After replacing the battery, unlock the
door with the key in the driver's door
lock. The radio remote control will be
synchronised when you switch on the
ignition.
Fault
If 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.● The range is exceeded.
● The battery voltage is 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 23.Electronic key system
Enables a keyless operation of the
following functions:
● central locking system 3 23
● tailgate 3 29
● ignition switching on and starting the engine 3 142
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.
22Keys, doors and windowsNotice
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 3 104.
Batteries do not belong in household
waste. They must be disposed of at
an appropriate recycling collection
point.
To replace:
1. Press button at the back of the electronic key unit and extract thekey blade from the housing.
2. Insert flat screwdriver or the key blade at the side of the housing
and separate the back cover from the electronic unit by turning the
screwdriver or key blade.
3. Remove and replace battery. Use
CR 2032 or equivalent battery.
Pay attention to the installation
position.
4. Install back cover of the electronic
unit and insert key element.
Batteries do not belong in household
waste. They must be disposed of at
an appropriate recycling collection
point.
Electronic key synchronisation
The electronic key synchronises itself automatically during every starting
procedure.
Keys, doors and windows23Fault
If 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 is out of reception range.
● The battery voltage is too low.
● Overload of the central locking system by operating at frequentintervals, 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 23.
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
of the remote control unit 3 139 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.
The settings of the driver's seat are
also memorised independent of the
memory positions 3 44.
The 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 3 106.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. A precondition is that the
setting is activated in the vehicle
personalisation 3 106.
26Keys, doors and windowsOperation with buttons on the
electronic key
The central locking system can also
be operated with the buttons on the
electronic key.
Press c to unlock.
Press e to lock.
Remote control operation 3 23.
Passive locking
Automatic locking 3 27.
Confirmation
Operation of central locking system is confirmed by the hazard warning
flashers. A precondition is that the
setting is activated in the vehicle
personalisation 3 106.
Central locking buttons Locks or unlocks all doors, the load
compartment and fuel filler flap from
the passenger compartment by a
switch in the driver's door panel.
Press e to lock.
Press c to unlock.
Operation with the key in case of
a central locking system fault
In case of a fault, e.g. vehicle battery
or remote control/electronic key
battery is empty, the driver's door can be locked or unlocked with the
mechanical key.
The lock cylinder in the driver's door
is covered by a cap.Remote control: to remove the cap,
insert the key into the recess at the
bottom of the cap and swivel the key
upward.
Keys 3 19.
Keys, doors and windows33Vehicle messages 3 104.
If the vehicle's battery is to be
disconnected (e.g. for maintenance
work), the alarm siren must be
deactivated as follows: switch the
ignition 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 has been
removed from the ignition switch.
If the 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 the
start attempt.
If the control indicator d continues
flashing, attempt to start the engine
using the spare key and seek the
assistance of a workshop.Notice
Radio Frequency Identification
(RFID) tags may cause interference
with the key. Do not have it placed near the key when starting the
vehicle.
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 23,
3 30.
Control indicator d 3 96.Exterior mirrors
Convex shape The convex exterior mirror on the
driver's side contains an aspherical
area and reduces blind spots. The
shape of the mirror makes objects
appear smaller, which will affect the
ability to estimate distances.
Side blind spot alert 3 178.
Electric adjustment
Keys, doors and windows37Child safety system for rear
windows
Press z to deactivate rear door
power windows; the LED illuminates.
To activate, press z again.
Operating windows from outside
The windows can be operated
remotely from outside the vehicle.
Press and hold c to open windows.
Press and hold e to close windows.
Release button to stop window
movement.
If the windows are fully opened or
closed, the hazard warning lights will
flash twice.
Overload
If the windows are repeatedly
operated within short intervals, the
window operation is disabled for
some time.
Initialising the power windows
If 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 3 104.
Activate the window electronics as
follows:
1. Close doors.
2. Switch on ignition.
3. Pull switch until the window is closed and keep pulling for
additional two seconds.
4. Push switch until the window is completely open and keep
pushing for additional
two seconds.
5. Repeat for each window.
Instruments and controls105● driver assistance systems
● cruise control
● speed limiter
● forward collision alert
● collision imminent braking system
● parking assist systems
● lighting, bulb replacement
● LED headlights
● wiper/washer system
● doors, windows
● side blind spot alert
● traffic sign assistant
● lane keep assist
● load compartment, tailgate
● radio remote control
● electronic key system
● keyless starting
● seat belts
● airbag systems
● engine and transmission
● tyre pressure
● diesel particle filter● vehicle battery status
● stop-start system
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 approaching a vehicle aheadtoo 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
● With exterior lights on.
During an Autostop ● If the driver's door is opened.
● If any condition for an autostart is
not fulfilled.