20Keys, doors and windows
■ Anti-theft alarm system 3 33
■ Load compartment 3 30
The remote control has a range of
approx. 5 metres. It can be restricted
by external influences. The hazard
warning flashers confirm operation.
Handle with care, protect it from
moisture and high temperatures and
avoid unnecessary operation.
Depending on model, the vehicle may use a 2 button or 3 button remote
control or an electronic key which
includes the functionality of the radio
remote control.
Electronic key system 3 21.
Fault
If the central locking system cannot
be operated with the remote control,
it may be due to the following:
■ Range exceeded
■ Battery voltage too low
■ Frequent, repeated operation of the
remote control while not in range,
which will require reprogramming
by a workshop■ 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 key operation 3 23.
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.
2-button and 3-button remote control
Remove screw and open battery
compartment by inserting a coin into
the slot and twisting.
Keys, doors and windows21
Replace the battery (battery type
CR 2016), paying attention to the installation position.
Reattach both halves of the cover,
ensuring they engage correctly.
Replace screw and tighten.
Electronic key
The need for battery replacement is
indicated by a message in the Driver
Information Centre 3 87.
Press and hold the release button on
the side of the electronic key and pull out the emergency manual key from
the top. Unclip the battery cover
located on the rear of the electronic
key, then press one side of the battery
to release and remove the battery.
Replace the battery (battery type
CR 2016), paying attention to the
installation position.
Reattach battery cover and reinsert
the emergency manual key.
Electronic key synchronisation
Press any button on the electronic
key four times within range of the
detection zone (approx. one metre) of the front doors or load compartment.
The electronic key will be
synchronised when the ignition is
switched on.Electronic key system
Enables a handsfree operation of the following functions:
■ Central locking system 3 23
■ Load compartment 3 30
■ Ignition switching on and starting the engine 3 110
The electronic key simply needs to be on the driver's person.
22Keys, doors and windows
Notice
Always take the electronic key with you when exiting the vehicle.
The electronic key being left in the
card reader is indicated by a warning chime 3 87 and a message in the
Driver Information Centre 3 87
when the driver's door is opened.
Additionally, the electronic key
includes the functionality of the radio
remote control 3 19 and an entry
lighting function 3 95.
Handle with care, protect from
moisture and high temperatures and
avoid unnecessary operation.
Notice
Do not put the electronic key in the
load compartment during driving, as
this is outside of the detection zone
(indicated by a warning chime at low
speed 3 87 and a message in the
Driver Information Centre 3 87).
Handsfree operation is automatically
disabled when the electronic key
buttons have been operated or thecentral locking switch e 3 23 is
pressed. To re-enable handsfree
operation, restart the engine.
Power button 3 110.
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 87.
Battery replacement, see Radio
remote control 3 19.
Fault
If the central locking system cannot
be operated or the engine cannot be
started, the cause may be one of the
following:
■ Fault in electronic key.
■ Electronic key out of reception range.
■ Battery voltage 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.
Emergency manual key
Press and hold the release button on
the side of the electronic key and pull out the emergency manual key from
the top.
Manually lock or unlock the doors by turning the key in the lock.
34Keys, doors and windows
Press electronic key button e to
activate the anti-theft alarm system.
Electronic key system 3 21.
Deactivation
Unlocking the vehicle (with button c
or the button on any exterior door handle) or switching on the ignition
deactivates the anti-theft alarm
system. Hazard warning lights flash to confirm deactivation.
The system is not deactivated when
unlocking the driver's door with the
key or with the central locking switch
in the passenger compartment.
Notice
If the alarm has been triggered,
unlocking the vehicle with the key
will not stop the alarm siren. To stop the siren, switch on the ignition. The
hazard warning lights will not flash
upon deactivation if the alarm has
been triggered.Activation without monitoring of
passenger compartment
Disable monitoring of the passenger
compartment, e.g. when animals are
being left in the vehicle, or if the
auxiliary heater has been set for a
timed or remote controlled start
3 102.
Press and hold button e on the
remote control or electronic key; an
audible signal will sound as
confirmation.
The status will remain until the doors
are unlocked.
AlarmWhen triggered, the alarm sounds via
a separate battery-backed power
sounder, and the hazard warning
lights flash simultaneously. The
number and duration of alarm signals are stipulated by legislation.
If the vehicle battery is disconnected
or its power supply is interrupted, the
alarm siren will be triggered. First
deactivate the anti-theft alarm system
if the vehicle battery must be
disconnected.To silence the alarm siren (if
triggered) and therefore deactivate
the anti-theft alarm system, reconnect vehicle battery and unlock the vehicle
or switch on the ignition.
Immobiliser
The immobiliser 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 and
also if the key is left in the ignition
switch when the engine is turned off.
If the engine cannot be started, switch off the ignition and remove key, wait
approx. 2 seconds and then repeat
the start attempt. If start attempt is
unsuccessful, attempt to start the
engine using the spare key and seek
the assistance of a workshop.
Instruments and controls87Vehicle messages
Messages are displayed in the Driver
Information Centre and may be
accompanied by illumination of
control indicator F or C in the
instrument cluster.
Information messages Information messages regarding,
e.g. engine starting conditions, stop-
start system, parking brake
application, central locking, steering
wheel lock etc. provide the current
status of certain vehicle functions and
instructions for use.
Fault messages Fault messages regarding, e.g. fuel
filter, airbags, exhaust emissions etc.
are displayed together with control
indicator F. Drive with caution and
seek the assistance of a workshop as
soon as possible.
To remove fault messages from the
display, press button on end of wiper
lever. After a few seconds the
message may disappearautomatically and F remains
illuminated. The fault will then be
stored in the on board system.
Warning messagesWarning messages regarding, e.g.
engine, battery or brake system
failure, are displayed together with
control indicator C and may be
accompanied by a warning chime.
Stop engine immediately and seek
the assistance of a workshop.
Fuel economy messages
Fuel economy messages provide tips to improve fuel efficiency. Journeys
can be saved in the system memory,
enabling you to compare
performances.
Refer to Infotainment system manual
for further information.
Fuel economy rating 3 88.
Warning chimes
A corresponding message may also
appear in the Driver Information
Centre when a warning chime is
sounded.When starting the engine or
whilst driving: ■ If seat belt is not fastened 3 47.
■ During operation of the turn and lane-change signals 3 93.
■ During illumination of certain control indicators.
■ If the parking assist detects an object 3 124.
■ If the vehicle speed briefly exceeds
a set limit 3 123.
■ If a door or the bonnet is not properly closed when vehicle
exceeds a certain speed.
■ If the electronic key is outside of the
detection range.
Electronic key system 3 21, Power
button 3 110.
When the vehicle is parked and/ or the driver's door is opened: ■ If the key has been left in the ignition.
■ If the electronic key has been left in
the card reader.
Driving and operating111
These functions stop working when
the driver's door is opened and the
vehicle is locked.
Notice
Always take the electronic key with you when exiting the vehicle.
The electronic key being left in the
card reader is indicated by a warning
chime 3 87 and a message in the
Driver Information Centre 3 87 when
the driver's door is opened.9 Danger
Never leave an electronic key
inside the vehicle when children or animals are left in the vehicle, to
avoid unintended operation of
windows, doors or engine. Risk of
fatal injury.
Fault
If the engine cannot be started, the
cause may be one of the following:
■ Fault in electronic key.
■ Electronic key out of reception range.
■ Battery voltage 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.
Battery replacement 3 19.
Central locking system 3 23.
Electronic key system 3 21.
Starting the engine
Manual transmission: operate clutch.
Do not accelerate.
Diesel engines: turn the key to
position M for preheating until control
indicator ! extinguishes in the
instrument cluster 3 84.
Turn key to position D and release.
The increased engine speed
automatically returns to normal idling
speed as the engine temperature
rises.
Start attempts should not last longer
than 15 seconds. If engine does not
start, wait 15 seconds before
repeating starting procedure. If
necessary, depress accelerator
before repeating starting procedure.
Before restarting or to switch off the
engine, turn key back to St.
138Vehicle care
■See the Owner's Manual for further
information.
■ Explosive gas may be present in the vicinity of the battery.
Charging the vehicle battery9 Danger
Ensure adequate ventilation when
charging the battery. There is a
risk of explosion if gases
generated during charging are
allowed to accumulate!
Jump starting 3 159.
Replacing the vehicle battery
Have the vehicle battery replaced by
a workshop.
Diesel fuel filter
Drain diesel fuel filter of residual
water at every engine oil change.
Place a container underneath the
filter housing. Loosen the knurled
screw on the lower part of the filter by approx. one turn, to drain off the
water.
The filter is drained as soon as water-
free diesel fuel emerges. Retighten
the screw.
Check diesel fuel filter at shorter
intervals if the vehicle is subjected to
extreme operating conditions.
Diesel fuel system
bleeding
If the fuel tank has been run dry, it will
be necessary to air vent or bleed the
diesel fuel system.
Refuel then proceed as follows: ■ Switch on the ignition (key to position M) for 5 seconds at a time.
■ Switch off ignition (key to position A) for 3 seconds.
■ Repeat this process multiple times.
■ Start the engine (key to position D)
then switch off (key to position St).
If the engine fails to start, seek the
assistance of a workshop.
Starting the engine 3 111.
Vehicle care147
No.Circuit1Vehicle battery (with electronic
key system)2APC battery backup (with elec‐
tronic key system)3Passenger compartment heater4Adaptations5Adaptations6Passenger compartment heater7Additional air conditioning8Additional heating9Electric exterior mirrors, addi‐
tional adaptations10Heated exterior mirrors11Radio, multimedia, electric exte‐
rior mirrors, diagnostic socket12Multimedia, trailer hitch13Fuel injection system, courtesy
lightsNo.Circuit14Fuel injection system, tyre pres‐ sure monitoring system, elec‐
tronic key system15Hazard warning flashers, turn and lane-change signals16Central locking17Left-hand high beam, right-hand
low beam, tail lights, left-hand
daytime running light18Front fog lights, rear fog lights,
number plate lighting19Alarm, horn, automatic light
control, wiper20Instrument cluster21Light switch22Rear window wiper, windscreen
washer pump, horn23APC general battery24Reversing lights25Engine start-stop buttonNo.Circuit26Fuel injection, starter27Airbag, steering column lock28Passenger power window29Power steering30Brake lights31APC battery backup (with elec‐
tronic key system)32Service display33Cigarette lighter, power outlet34Right-hand high beam, left-
hand low beam, headlights,
right-hand daytime running light35Brake lights, ABS, immobiliser36Interior lighting, air conditioning37Starting with electronic key
system38Rear window wiper39Warning chimes