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Keys, doors and windows37If 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 3 152.
If the control indicator d continues
flashing, attempt to start the engine
using the spare key.
Seek the assistance of a workshop.Notice
Radio Frequency Identification
(RFID) tags may cause interference with the key. Do not have it placednear 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 25,
3 34.
Control indicator d 3 109.Exterior mirrors
Convex shape The shape of the mirror makes
objects appear smaller, which will
affect the ability to estimate
distances.
Side blind spot alert 3 205.
Electric adjustment
Select the relevant exterior mirror by
pushing í for left mirror or ì for right
mirror. LED in button indicates the
selection.
Page 41 of 313
Keys, doors and windows39Heated mirrors
Heating of rear window and exterior
mirrors is operated by pressing b.
LED in button illuminates.
Heating works with the engine
running and is switched off
automatically after a short time.
Automatic dimming Dazzling by following vehicles in the
dark is automatically reduced by
dimming the exterior mirror on the
driver's side.
Parking assist
For mirrors with position memory, the exterior mirrors are automatically
aimed at the rear tyres as a parking
aid when reverse gear is selected, except during trailer operation.
Position memory 3 50.
Activation or deactivation of this
function can be changed in vehicle personalisation.
Vehicle personalisation 3 122.Interior mirrors
Manual anti-dazzle
To reduce dazzle, adjust the lever on the underside of the mirror housing.
Page 44 of 313

42Keys, doors and windows
Press and hold c for more than
2 seconds to open windows.
Press and hold e for more than
2 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 3 121.
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 2 seconds.
4. Push the switch until the window is completely open and keep
pushing for additional 2 seconds.
5. Repeat for each window.Heated rear window
Heating of rear window and exterior
mirrors is operated by pressing b.
LED in button illuminates.
Heating works with the engine
running and is switched off
automatically after a short time.
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Keys, doors and windows43Heated windscreen
Operated by pressing ,. LED in
button illuminates.
Heating works with the engine
running and is switched off
automatically after a short time.
Pressing , once more during the
same ignition cycle allows the heating to operate for another three minutes.
Sun visors The sun visors can be folded down or
swivelled to the side to prevent
dazzling.
The covers of the mirrors should be
closed when driving.
A ticket holder is located on the
backside of the sun visor.Roof
Sunroof9 Warning
Take care when operating the
sunroof. Risk of injury, particularly to children.
Keep a close watch on the
movable parts when operating
them. Ensure that nothing
becomes trapped in them as they
move.
Switch on ignition to operate the sunroof.
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54Seats, restraintsHeating
Adjust heating to the desired setting
by pressing ß for the respective seat
one or more times. The control
indicator in the button indicates the
setting.
Prolonged use of the highest setting
for people with sensitive skin is not
recommended.
The seat heating will be reduced
automatically from highest level to
medium level after 30 minutes.
Seat heating is operational when
engine is running and during an
Autostop.
Stop-start system 3 156.
Automatic seat heating Depending on the equipment, the
automatic seat heating can be
enabled in the vehicle personalisation
menu in the Info Display.
Vehicle personalisation 3 122.
When enabled, the heating of the
seats will be activated automatically
at vehicle start. The activation is
based on several parameters such as vehicle interior temperature, intensity
and direction of the sun and
temperature setting of the electronic
climate control system for the driver
and passenger side.
As the vehicle's interior warms up, the
seat heating level will be reduced
automatically until it finally goes off. The seat heating level being provided during the automatic operation is
shown by heated seat indicator lights.
If the passenger seat is unoccupied,
the automatic seat heating feature will not activate the seat heating for that
seat.The seat heating buttons can be
pressed at any time to exit the
automatic seat heating for the
respective seat and control the seat heating manually instead.
Ventilating
Adjust ventilation to the desired
setting by pressing A for the
respective seat one or more times.
The control indicator in the button
indicates the setting.
Ventilated seats are operational when
engine is running and during an
Autostop.
Stop-start system 3 156.
Page 57 of 313
Seats, restraints55Massage
Press c to switch on the back
massage function.
To switch off, press c again. The
current massage procedure will be
ended, this may take a few seconds.
After ten minutes the massage
function is switched off automatically.
Rear seats
Armrest
Fold armrest down. The armrest
contains cupholders.
Heating
Activate seat heating by pressing ß
for the respective rear outer seat.
Activation is indicated by the LED in
the button.
Press ß once more to deactivate seat
heating.
Prolonged use for people with
sensitive skin is not recommended.
Seat heating is operational when engine is running and during an
Autostop.
Stop-start system 3 156.
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Instruments and controls87Instruments and
controlsControls ....................................... 88
Steering wheel adjustment ........88
Steering wheel controls .............88
Heated steering wheel ...............88
Horn ........................................... 89
Windscreen wiper and washer ..89
Rear window wiper and washer ...................................... 91
Outside temperature ..................92
Clock ......................................... 92
Power outlets ............................. 93
Inductive charging .....................94
Ashtrays .................................... 95
Warning lights, gauges and indi‐ cators ........................................... 96
Instrument cluster ......................96
Speedometer ........................... 100
Odometer ................................ 101
Trip odometer .......................... 101
Tachometer ............................. 102
Fuel gauge .............................. 102
Engine coolant temperature gauge ..................................... 102
Service display ........................ 103Control indicators ....................104
Turn lights ................................ 104
Seat belt reminder ...................104
Airbag and belt tensioners .......105
Airbag deactivation ..................105
Charging system .....................105
Malfunction indicator light ........105
Brake and clutch system .........106
Electric parking brake ..............106
Electric parking brake fault ......106
Antilock brake system (ABS) ...106
Gear shifting ............................ 107
Following distance ...................107
Lane keep assist .....................107
Electronic Stability Control off . 107
Electronic Stability Control and Traction Control system .........107
Traction Control system off .....107
Engine coolant temperature ....107
Preheating ............................... 108
AdBlue ..................................... 108
Tyre pressure monitoring system .................................... 108
Engine oil pressure ..................108
Low fuel ................................... 108
Immobiliser .............................. 109
Exterior light ............................ 109
High beam ............................... 109
High beam assist .....................109
LED headlights ........................ 109Front fog lights......................... 109
Rear fog light ........................... 109
Cruise control .......................... 109
Adaptive cruise control ............109
Vehicle detected ahead ...........110
Pedestrian detection ................110
Speed limiter ........................... 110
Traffic sign assistant ................110
Door open ................................ 110
Displays ..................................... 110
Driver Information Centre ........110
Info Display .............................. 116
Head-up display ......................117
Vehicle messages ......................121
Warning chimes .......................121
Vehicle personalisation ..............122
Telematics service .....................126
Emergency call ........................126
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88Instruments and controlsControlsSteering wheel adjustment
Unlock lever, adjust steering wheel,
then engage lever and ensure it is
fully locked.
Do not adjust steering wheel unless
vehicle is stationary and steering
wheel lock has been released.
Steering wheel controls
Cruise control and speed limiter are
operated via the controls on the left
side of the steering wheel.
Additionally, forward collision alert
can be set by using the controls on the
left side of the steering wheel.
Infotainment system can be operated
via the controls on the right side of the
steering wheel.
Driver assistance systems 3 177.
Further information is available in the
Infotainment manual.
Driver Information Centre 3 110.
Heated steering wheel
Activate heating by pressing *.
Activation is indicated by the LED in
the button.
Heating is operational when the
engine is running and during an
Autostop.
Stop-start system 3 156.