22Keys, doors and windows
The electronic key simply needs to beon the driver's person.
Additionally, the electronic key
includes the functionality of the radio
remote control.
Handle with care, protect from
moisture and high temperatures and
avoid unnecessary operation.
Note
Do not put the electronic key in the
load compartment.
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.
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.
Keys, doors and windows232. Insert the key blade again forapprox. 6 mm and turn the key to
open the housing. Further
insertion of the key blade can
damage the housing.
3. Remove and replace battery. Use
CR 2032 or equivalent battery.
Pay attention to the installation
position.
4. Close the housing and insert key blade.
Batteries do not belong in household
waste. They must be disposed of at an appropriate recycling collection
point.
Fault
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 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
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
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 electronic key which is used. The status change is available
only after locking and unlocking the
vehicle.
The assigned memory position of the
power seat is automatically recalled
when switching on ignition and Auto
Memory Recall is activated in the
Info-Display for the memorised
electronic key.
Power seat 3 45.
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.
Note
In the event of an accident in which
airbags or belt pretensioners are
deployed, the vehicle is
automatically unlocked.
26Keys, doors and windowsOperation with the key in case of
a central locking system fault
In case of a fault, e.g. vehicle battery
or electronic key battery is
discharged, 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.
Electronic key: to remove the cap,
press button at the back and extract
the key blade from the housing. Insert
the key into the recess at the bottom
of the cap and swivel the key upward.
Electronic key system 3 21.
Manual unlocking
Manually unlock the driver's door by
inserting and turning the key in the
lock cylinder.
The other doors can be opened by
pulling the interior handle twice or by
pressing c in the driver's door panel.
The load compartment and fuel filler
flap will possibly not be unlocked.
By switching on the ignition, the anti-
theft locking system is deactivated.
Manual locking
Push inside locking knob of all doors
except driver's door or press e in the
driver's door panel. Then close the driver's door and lock it from the
outside by turning the key in the lock
cylinder. The fuel filler flap and
tailgate are possibly not locked.
32Keys, doors and windowsThe electronic key must be outside
the vehicle, within a range of approx.
one metre of the relevant door side.
The system is not deactivated by
unlocking the driver's door with the
key or with the central locking button
in the passenger compartment.
AlarmWhen triggered, the alarm hornsounds 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 by pressing c, by
pressing the switch on the door
handle with 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 the next time the vehicle is unlocked 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 the
ignition on then off, then disconnect
the vehicle's battery within
15 seconds.
Immobiliser The immobiliser is activated
automatically.
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. Retry with the key in the transmitter pocket. Operation on
vehicles with electronic key system in
case of failure 3 154.
If the control indicator d continues
flashing, attempt to start the engine
using the spare key.
Seek the assistance of a workshop.Note
Radio Frequency Identification
(RFID) tags may cause interference with the key. Do not have it placednear the key when starting the
vehicle.
Note
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 3 102.
Keys, doors and windows37
Press and hold c for more than two
seconds to open windows.
Press and hold e for more than two
seconds 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 3 115.
Activate the window electronics as
follows:
1. Close doors.
2. Switch on ignition.
3. Pull the switch until the window is closed and keep pulling for
additional two seconds.
4. Push the switch until the window is completely open and keep
pushing for additional
two seconds.
5. Repeat for each window.Heated rear window
Operated by pressing b together with
heated exterior mirrors. LED in button illuminates.
Heating works with the engine
running and is switched off
automatically after a short time.
78Instruments and controlsInstruments and
controlsControls ....................................... 79
Steering wheel adjustment ........79
Steering wheel controls .............79
Heated steering wheel ...............80
Horn ........................................... 80
Windscreen wiper/washer .........80
Rear window wiper/washer .......82
Outside temperature ..................83
Clock ......................................... 83
Power outlets ............................. 85
Inductive charging .....................86
Ashtrays .................................... 86
Warning lights, gauges and indi‐ cators ........................................... 88
Instrument cluster ......................88
Speedometer ............................. 93
Odometer .................................. 94
Trip odometer ............................ 94
Tachometer ............................... 95
Fuel gauge ................................ 95
Engine coolant temperature gauge ....................................... 96
Service display .......................... 96
Control indicators ......................97Turn signal................................. 97
Seat belt reminder .....................97
Airbag and belt tensioners .........98
Airbag deactivation ....................98
Charging system .......................99
Malfunction indicator light ..........99
Brake and clutch system ...........99
Electric parking brake ................99
Electric parking brake fault ........99
Antilock brake system (ABS) ...100
Gear shifting ............................ 100
Following distance ...................100
Lane keep assist .....................100
Electronic Stability Control off . 100
Electronic Stability Control and Traction Control system .........100
Traction Control system off .....101
Engine coolant temperature ....101
Preheating ............................... 101
AdBlue ..................................... 101
Tyre pressure monitoring system .................................... 101
Engine oil pressure ..................101
Low fuel ................................... 102
Immobiliser .............................. 102
Exterior light ............................ 102
High beam ............................... 102
High beam assist .....................102
LED headlights ........................ 102
Fog light ................................... 102Rear fog light........................... 103
Cruise control .......................... 103
Adaptive cruise control ............103
Vehicle detected ahead ...........103
Pedestrian detection ................103
Speed limiter ........................... 103
Traffic sign assistant ................103
Door open ................................ 103
Information displays ...................104
Driver Information Centre ........104
Info display .............................. 111
Head-up display ......................113
Vehicle messages ......................115
Warning chimes .......................116
Battery voltage ........................ 116
Vehicle personalisation ..............117
Telematics service .....................121
OnStar ..................................... 121
Instruments and controls85Note
If date information is automatically
provided, this menu item is not
available.
Select Auto Set at the bottom of the
screen. Activate either On - RDS or
Off - Manual .
If Off - Manual is selected, adjust the
date by touching n or o.
Clock display
Select Clock Display to enter the
respective submenu.
To turn off the digital clock display in
the menus, select Off.Power outlets
A 12 Volt power outlet is located in the
centre console.
Do not exceed the maximum power
consumption of 120 watts.
With ignition off, the power outlet is
deactivated. Additionally, the power outlet is deactivated in the event of
low vehicle battery voltage.
Electrical accessories that are
connected must comply with the
electromagnetic compatibility
requirements laid down in
DIN VDE 40 839.
Do not connect any current-delivering accessories, e.g. electrical charging
devices or batteries.
Do not damage the outlets by using
unsuitable plugs.
Stop-start system 3 157.
USB charging port
An USB port for charging devices is
located below the foldable armrest.
The USB port has also a data
connection to the Infotainment
system.
Instruments and controls99The front passenger airbag is
deactivated.
Airbag deactivation 3 58.
Charging system
p illuminates red.
Illuminates when the ignition is
switched on and extinguishes shortly
after the engine starts.
Illuminates when the engine is
running
Stop, switch off engine. Vehicle
battery is not charging. Engine
cooling may be interrupted. The
brake servo unit may cease to be
effective. Seek the assistance of a
workshop.
Malfunction indicator light Z illuminates or flashes yellow.
Illuminates when the ignition is
switched on and extinguishes shortly
after the engine starts.Illuminates when the engine is
running
Fault in the emission control system. The permitted emission limits may be exceeded.
On diesel engines, the cleaning
process of the diesel particle filter is
potentially not possible.
Seek the assistance of a workshop
immediately.
Flashes when the engine is
running
Fault that could lead to catalytic
converter damage. Ease up on the
accelerator until the flashing stops.
Seek the assistance of a workshop
immediately.
Brake and clutch system
R illuminates red.
The brake and clutch fluid level is too
low.9 Warning
Stop. Do not continue your
journey. Consult a workshop.
Electric parking brake
m illuminates or flashes red.
Illuminates
Electric parking brake is applied
3 171.
Flashes
Electric parking brake is not fully applied or released. Depress the
brake pedal and attempt to reset the system by first releasing then
applying the electric parking brake. If
m remains flashing, do not drive and
seek the assistance of a workshop.
Electric parking brake fault
j illuminates or flashes yellow.
Illuminates
Electric parking brake is operating
with degraded performance 3 171.