20Keys, doors and windowsLock 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 and then re-insert it. If the
cylinder still free-wheels, turn the key through 180° and repeat operation.
Key with foldaway key section
Press button to extend. To fold the
key, first press the button.
Car Pass
The Car Pass contains security
related vehicle data and should
therefore be kept in a safe place.
When the vehicle is taken to a
workshop, this data is required in
order to perform certain operations.
Radio remote control
Used to operate: ● central locking system
● anti-theft locking system
● anti-theft alarm system
● power windows
The radio remote control has a range of approx. five metres. It can be
restricted by external influences. The
hazard warning flashers confirm
operation.
Handle with care, protect from
moisture and high temperatures and
avoid unnecessary operation.
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, 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.
Keys, doors and windows21Unlocking 3 22.
Basic settings Some settings can be changed in the
menu Settings in the Info-Display.
Vehicle personalisation 3 111.
Radio remote control battery
replacement
Replace the battery as soon as the
range is reduced.
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.
Key with fixed key section
Have the battery replaced by a
workshop.
Radio remote control
synchronisation
After replacing the battery, unlock the
door with the key in the driver's door
lock. The radio remote control will be
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 (only CD 400)
● central locking system
● comfort settings
The saved settings are automatically
used the next time the memorised key
is inserted into the ignition switch and
turned to position 1 3 139.
A precondition is that Personalization
by driver is activated in the personal
settings of the Graphic-Info-Display.
This must be set for each key used.
On vehicles equipped with
28Keys, doors and windowsStatus LED
Status LED is integrated in the central
locking button.
Status during the first 10 seconds of
anti-theft alarm system activation:
LED illuminates:test, arming delayLED flashes
quickly:doors, tailgate or
bonnet not
completely closed,
or system fault
Status after system is armed:
LED flashes
slowly:system is armed
Seek the assistance of a workshop in the event of faults.
Alarm
When triggered, the alarm horn
sounds and the hazard warning lights
flash simultaneously. The number
and duration of alarm signals are
stipulated by legislation.
The alarm can be silenced by
pressing any button of the radio
remote control or by switching on the
ignition.
The anti-theft alarm system can be
deactivated only by pressing c or by
switching on the ignition.
A triggered alarm, which has not been interrupted by the driver, will be
indicated by a warning message or a
warning code in the Driver
Information Centre after switching on
the ignition.
Vehicle messages 3 105.
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 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 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 then repeat the start attempt.
If control indicator d continues
flashing, attempt to start the engine
using the spare key and seek the
assistance of a workshop.
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 22,
3 27.
Control indicator d 3 98.
32Keys, doors and windowsChild safety system for rear
windows
Press z to deactivate rear door
power windows, the LED illuminates.
To activate, press z again.
Operating windows from outside
The windows can be operated
remotely from outside the vehicle.
Press and hold c to open windows.
Press and hold e to close windows.
Release button to stop window
movement.
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 or a warning code
is displayed in the Driver Information
Centre.
Vehicle messages 3 105.
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 two seconds.
4. Repeat for each window.
Heated rear window
Operated by pressing Ü.
Lighting127Activating
1. Switch off ignition.
2. Remove ignition key.
3. Open driver's door.
4. Pull turn signal lever.
5. Close driver's door.
If the driver's door is not closed the
lights switch off after 2 minutes.
Exit lighting is switched off
immediately if the turn signal lever is pulled while the driver's door is open.
Activation, deactivation and duration
of this function can be changed in the Settings menu in the Info-Display.
Vehicle personalisation 3 111.
The settings can be saved for the key
being used 3 21.
Battery discharge protection
Switching off electric lights
To prevent discharge of the vehicle
battery when the ignition is switched
off, some interior lights are switched
off automatically after some time.
140Driving and operatingPower to the Infotainment system willcontinue to operate for 30 minutes oruntil the key is removed from theignition, regardless of whether anydoor is opened.
Starting the engine
Manual transmission: operate clutch.
Automatic transmission: operate
brake and move the selector lever to
P or N.
Do not operate accelerator pedal.
Diesel engine: turn the key to position 2 for preheating until control
indicator ! extinguishes.
Turn the key briefly to position 3 and
release: an automatic procedure operates the starter with a short delay
as long as the engine is running, see
Automatic Starter Control.
Before restarting or to switch off the
engine, turn the key back to position
0 .
During an Autostop, the engine can
be started by depressing the clutch
pedal.
Starting the vehicle at low
temperatures
The start of the engine without
additional heaters is possible down to
-25 °С for diesel engines and -30 °C
for petrol engines. Required is an
engine oil with the correct viscosity,
the correct fuel, performed services
and a sufficiently charged vehicle
battery. With temperatures below
-30 °C the automatic transmission
needs a warming phase of approx.
five minutes. The selector lever must
be in position P.Automatic Starter Control
This function controls the engine
starting procedure. The driver does
not have to hold the key in position 3.
Once applied, the system will go on starting automatically until the engine
is running. Because of the checking
procedure, the engine starts running
after a short delay.
Possible reasons for a non-starting
engine:
● clutch pedal not operated (manual transmission)
● brake pedal not operated or selector lever not in P or N
(automatic transmission)
● timeout occurred
Turbo engine warm-up
Upon start-up, engine available
torque may be limited for a short time, especially when the engine
temperature is cold. The limitation is
to allow the lubrication system to fully
protect the engine.
Driving and operating143● The stop-start system ismanually deactivated.
● The bonnet is opened.
● The driver's seat belt is unfastened and the driver's door
is opened.
● The engine temperature is too low.
● The charging level of the vehicle battery is below a defined level.
● The brake vacuum is not sufficient.
● The vehicle is driven at least at walking speed.
● The climate control system requests an engine start.
● The air conditioning is manually switched on.
If the bonnet is not fully closed, a
warning message is displayed in the
Driver Information Centre.
If an electrical accessory, e.g. a
portable CD player, is connected to
the power outlet, a brief power drop during the restart might be noticeable.Parking9 Warning
● Do not park the vehicle on an
easily ignitable surface. The
high temperature of the
exhaust system could ignite the
surface.
● Always apply parking brake. Pull switch m for approx.
one second.
The electric parking brake is
applied when control indicator
m illuminates 3 95.
● Switch off the engine. ● If the vehicle is on a level surface or uphill slope, engage
first gear or set the selector
lever to position P before
removing the ignition key. On
an uphill slope, turn the front
wheels away from the kerb.
If the vehicle is on a downhill
slope, engage reverse gear or
set the selector lever to position P before removing the ignition
key. Turn the front wheels
towards the kerb.
● Close the windows.
● Remove the ignition key from the ignition switch. Turn the
steering wheel until the
steering wheel lock is felt to
engage.
For vehicles with automatic
transmission, the key can only
be removed when the selector
lever is in position P.
Lock the vehicle and activate the anti-
theft alarm system.
Notice
In the event of an accident with
airbag deployment, the engine is
turned off automatically if the vehicle comes to a standstill within a certain
time.
Driving and operating147Manual mode
Move selector lever out of position D
towards the left and then forwards or backwards.
<:shift to a higher gear]:shift to a lower gear
If a higher gear is selected when
vehicle speed is too low, or a lower
gear when vehicle speed is too high,
the shift is not executed. This can
cause a message in the Driver
Information Centre.
In manual mode, no automatic
shifting to a higher gear takes place
at high engine revolutions.
Electronic driving
programmes
● Following a cold start, the operating temperature
programme increases engine
speed to quickly bring the
catalytic converter to the required
temperature.
● The automatic neutral shift function automatically shifts to
idling when the vehicle is stopped with a forward gear engaged and
the brake pedal is pressed.
● Special programmes automatically adapt the shiftingpoints when driving up inclines or
down hills.
Kickdown If the accelerator pedal is pressed
down completely in automatic mode,
the transmission shifts to a lower gear
depending on engine speed.Fault
In the event of a fault, g illuminates.
Additionally a code number or a
vehicle message is displayed in the
Driver Information Centre. Vehicle
messages 3 105.
The transmission no longer shifts automatically. Continued travel is
possible with manual shifting.
Only the highest gear is available.
Depending on the fault, second gear
may also be available in manual
mode. Shift only when vehicle is at a
standstill.
Have the cause of the fault remedied
by a workshop.
Interruption of power supply
In the event of an interruption of
power supply, the selector lever
cannot be moved out of the P
position. The ignition key cannot be
removed from the ignition switch.
If the vehicle battery is discharged,
start the vehicle using jump leads
3 212.