Page 23 of 245

Keys, doors and windows21Key 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 31
● tailgate unlocking 3 23
● power windows 3 36
● mirrors folding 3 34
The remote control has a range of up
to 100 m, 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.
Page 24 of 245

22Keys, doors and windows
1. To unclip the cover insert a smallscrewdriver between the back
cover and the remote control.
2. Remove the back cover.
3. Extract the flat battery from its location.
4. Replace battery with a battery of the same type. Pay attention to
the installation position.
5. Clip the cover in place.
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.
● 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
● ignition switching on and starting the engine 3 124
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 21.
Handle with care, protect from
moisture and high temperatures and
avoid unnecessary operation.
Page 25 of 245

Keys, doors and windows23Notice
To save battery power, the keyless
functions are set to stand-by after 21
days of non-use. To reactivate the
functions, press a button on the
electronic key.
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 95.
Batteries do not belong in household
waste. They must be disposed of at
an appropriate recycling collection
point.
1. To unclip the cover insert a small screwdriver in the cutout.
2. Remove the cover.
3. Extract the flat battery from its location.
4. Replace battery with a battery of the same type. Pay attention to
the installation position.
5. Clip the cover in place.
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 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.
Central locking system Unlocks and locks doors, load
compartment and fuel filler flap.
Pull an interior door handle fully to
unlock and open the respective door.
Page 29 of 245
Keys, doors and windows27
Press Q to lock. The LED in the button
illuminates.
Press Q again to unlock. The LED in
the button extinguishes.
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 discharged, the vehicle can be locked or unlocked with the
mechanical key.
Manual unlocking
Electronic key: press and hold the latch to extract the integral key.Manually unlock the driver's door by
inserting and turning the key in the
lock cylinder. With working central locking system the vehicle will be
unlocked.
By switching on the ignition, the anti- theft locking system is deactivated.
The other doors can be opened by
pulling the interior handle. The load
compartment and fuel filler flap will
possibly not be unlocked.
Manual locking
Manually lock the driver's door by
inserting and turning the key in the lock cylinder. With working centrallocking system the vehicle will be
locked.
Page 35 of 245

Keys, doors and windows33lights. They will flash quickly four
times the next time the vehicle is
unlocked with the radio remote
control.
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.
If the battery has been reconnected
(e.g. after maintenance work), wait for
10 minutes to restart the engine.
Immobiliser The system checks whether the
vehicle is allowed to be started with the key being used.
The immobiliser is activated
automatically at the end of a trip.
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. Always lock the vehicle after
leaving it 3 23.
Switch on the anti-theft alarm system 3 31.
Emergency operation of electronic key 3 123.Exterior mirrors
Convex shape 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
pushing the mirror button to the left or right.
Then swivel the control to adjust the
mirror.
Page 39 of 245

Keys, doors and windows37Child safety system for rear
windows
Press V to deactivate rear door
power windows; the LED illuminates.
To activate, press V again.
Operating windows from outside
The windows can be operated
remotely from outside the vehicle.
Press and hold e to close windows.
Release button to stop window
movement.
If the windows are fully 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 95.
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 2 seconds.
4. Push switch until the window is completely open and keep
pushing for additional 2 seconds.
5. Repeat for each window.
Heated rear window
Operated by pressing b.
Heating works with the engine
running and is switched off
automatically after a short time.
Depending on climate control system, b is located at a different position.
Page 76 of 245

74Instruments and controlsClockDate and time are shown in the
Info Display 3 91.
Setting date and time, see
Infotainment manual.
Power outlets
A 12 V power outlet is located in the
centre console.
Another power outlet is located in the
console between the front seats.
Do not exceed the maximum power
consumption of 120 W.
With ignition off, the power outlet is deactivated. Additionally, the poweroutlet 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 3 126.
USB charging port
One or two USB ports are prepared
for charging devices.
When two USB ports are available,
the upper USB port can be used to
connect a phone for phone projection.
Notice
The sockets must always be kept
clean and dry.
USB port and phone projection see
Infotainment manual.
Page 86 of 245

84Instruments and controlsIlluminates 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.
Seek the assistance of a workshop
immediately.Flashes when the engine is
running
The engine management system has
a 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 C illuminates yellow.
Illuminates briefly when the ignition is
switched on.
May illuminate together with other
control indicators and a
corresponding message in the Driver
Information Centre.
Seek the assistance of a workshop
immediately.
Stop engine
Y illuminates red.
Illuminates briefly when the ignition is
switched on.Illuminates together with other control indicators, accompanied by a warning chime and a corresponding message
in the Driver Information Centre.
Stop engine immediately and seek
the assistance of a workshop.
System check J illuminates yellow or red.
Illuminates yellow A minor engine fault has been
detected.
Illuminates red A major engine fault has been
detected.
Stop engine as soon as possible and seek the assistance of a workshop.
Brake and clutch system
R illuminates red.
The brake and clutch fluid level is too low, when parking brake is not
applied 3 179.