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Keys, doors and windows21
FaultIf the central locking system cannot
be operated with the radio remote
control, it may be due to the following:
■ 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
Unlocking 3 22.
Basic settings Some settings can be changed in the menu Settings in the Info-Display.
Vehicle personalisation 3 99.
Radio remote control battery
replacement 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.
Key with foldaway key section
Extend the key and open the unit.
Replace the battery (battery type CR 2032), paying attention to the
installation position. Close the unit
and synchronise.
Radio remote controlsynchronisation
After replacing the battery, unlock the
door with the key in the driver's door
lock. The radio remote control is
synchronised when the ignition is
switched on.
Memorised settings Whenever the key is removed from
the ignition switch, the following
settings are automatically memorised by the key:
■ Lighting
■ Infotainment system
■ Central locking system
The saved settings are automatically
used the next time the memorised key
is inserted into the ignition switch and
turned to position 1 3 122.
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Keys, doors and windows27
Auto door lockingIf any of the doors is not opened or the
position of the ignition key is not
located in position 2 or 3 3 122 within
3 minutes after unlocking doors with
the radio remote control, all doors are locked and the anti-theft alarm
system is activated automatically.
Automatic door unlocking
All doors will be automatically
unlocked when impact is delivered to
impact sensors while the ignition is
switched on.
However, the doors may not be
unlocked if mechanical problems
occur with the door locking system or battery.
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 continues
flashing, attempt to start the engine
using the spare key and seek the
assistance of a workshop.
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 22,
3 26.
Control indicator d 3 88.Exterior mirrors
Convex shape
The convex exterior mirror 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.
Electric adjustment
Select the relevant exterior mirror by
turning the control to left (L) or right
(R) . Then swivel the control to adjust
the mirror.
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Keys, doors and windows31
Child safety system for rear
windows
Press switch z to deactivate rear
power windows.
To activate, press z again.
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),
activate the window electronics as
follows:
1. Close doors.
2. Switch on ignition.
3. Close the window completely and
keep the switch pulled for
additional 2 seconds.
4. Repeat for each window.
Heated rear windowOperated by pressing the Ü button.
Heating works with the engine
running and is switched off
automatically after a short time.
Depending on the engine type, the
heated rear window comes on
automatically when the diesel particle filter is being cleaned.
Sun visors
The sun visors can be folded down or swivelled to the side to prevent
dazzling.
The sun visors mirror covers should
be closed when driving.
If the sun visors have a vanity mirror
lamp, the lamp will illuminate when
opening the vanity mirror cover.
Page 81 of 217
Instruments and controls79Power outlets
A 12 Volt power outlet is located in the
front console.
Do not exceed the maximum power
consumption of 120 watts.
A 230 Volt power outlet is located in
the rear console.
Do not exceed the maximum power
consumption of 150 watts.
With ignition off the power outlet is
deactivated.
Additionally the power outlet is
deactivated in case of low battery
voltage.
Electrical accessories that are
connected must comply with the
electromagnetic compatibility
requirements laid down in
DIN VDE 40 839.
Caution
Do not connect any current- delivering accessories, e.g.
electrical charging devices or
batteries.
Do not damage the sockets by
using unsuitable plugs.
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Instruments and controls85
* illuminates yellow.
The front passenger airbag is
deactivated 3 47.9 Danger
Risk of fatal injury for a child using
a child restraint system together
with activated front passenger
airbag.
Risk of fatal injury for an adult
person with deactivated front
passenger airbag.
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. 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. 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.
Service vehicle soon g illuminates yellow.
Additionally a warning message or a
warning code is displayed.
The vehicle needs a service.Seek the assistance of a workshop.
Vehicle messages 3 94.
Brake and clutch system
Brake and clutch fluid level R illuminates red.
The brake and clutch fluid level is too
low 3 158.9 Warning
Stop. Do not continue your
journey. Consult a workshop.
Illuminates after the ignition is
switched on if the parking brake is
applied 3 133.
Operate pedal
- illuminates yellow.
Clutch pedal must be operated to
start the engine. Stop-start system 3 123.
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Instruments and controls95
Vehicle messages on the
Midlevel-Display
The vehicle messages are displayed
as code numbers.
No.Vehicle message10Brakes overheated16Brake light failure25Left front turn signal failure26Left rear turn signal failure27Right front turn signal failureNo.Vehicle message28Right rear turn signal failure53Tighten gas cap54Water in diesel fuel filterS68Service power steeringS73Service all-wheel drive systemS75Service air conditioningS79Top up engine oilS81Service transmissionS82Change engine oil soonS84Engine power is reducedS89Service vehicle soon128Bonnet open134Park assist fault, clean
bumperS136Service parking assist174Low batteryNote
"S" means "Service vehicle soon".
Seek the assistance of a workshop
immediately.
Vehicle messages on the
Uplevel-Combi-Display
The vehicle messages are displayed
as text. Follow the instructions given
in the messages.
The system displays messages
regarding the following topics:
■ Fluid levels
■ Anti-theft alarm system
■ Brakes
Page 98 of 217

96Instruments and controls
■ Drive systems
■ Ride control systems
■ Cruise control
■ Object detection systems
■ Lighting, bulb replacement
■ Wiper/washer system
■ Doors, windows
■ Seat belts
■ Airbag systems
■ Engine and transmission
■ Tyre pressure
■ Battery
Warning chimes
When starting the engine or
whilst driving ■ If the door or bonnet is open.
■ If seat belt is not fastened.
■ If a certain speed is exceeded with parking brake applied.■ If a warning message or a warningcode appears in the Driver
Information Centre.
■ If the parking assist detects an object.
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.
Battery voltage When the battery voltage is running
low, a warning message or warning
code 174 will appear in the Driver
Information Centre.
1. Switch off immediately any electrical consumers which are
not required for a safe ride, e.g.
seat heating, heated rear window or other main consumers.
2. Charge the battery by driving continuously for a while or by
using a charging device.The warning message or warning
code will disappear after the engine has been started twice consecutively
without a voltage drop.
If the battery cannot be recharged,
have the cause of the fault remedied
by a workshop.
Page 116 of 217
114Lighting
Vehicles with automatic light1. Light switch in AUTO.
2. Switch off ignition.
3. Remove ignition key.
Depending on the external lighting
conditions the exit lighting is switched
on.
Battery discharge
protection To prevent discharge of the battery
when the ignition is switched off,
some interior lights are switched off
automatically after some time.