Keys, doors and windows23
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 is out of reception range.
■ The battery voltage is 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 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
with remote control unit 3 153 or
electronic key 3 22.
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 50.
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 3 122.
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.
Instruments and controls121
■ 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
■ selective catalytic reduction, diesel exhaust fluid (DEF), AdBlue
3 161
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 withparking brake applied.
■ If adaptive cruise control deactivates 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.
■ If AdBlue needs to be refilled.
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.
