Keys, doors and windows21Lock 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 vehicle data is needed
in order to perform certain operations.
Radio remote control
Used to operate: ● central locking system
● anti-theft locking system
● anti-theft alarm system
The radio remote control has a range of approx. 20 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, it may be due to the following:
● 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.
Unlocking 3 22.
22Keys, doors and windowsBasic settingsSome settings can be changed in the
Info-Display.
Vehicle personalisation 3 105.
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.
Extend the key and open the unit
sideways. Replace the battery
(battery type CR 2032), paying
attention to the installation position.
Close the unit and synchronise.
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
● electronic climate control
● presets for Infotainment system
● 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 3 133.
A precondition is that Personalization
by driver is activated in the personal
settings of the Info-Display. This must
be set for each key used.
Vehicle personalisation 3 105.
Central locking system Unlocks and locks doors, load
compartment and fuel filler flap.
Instruments and controls105When the vehicle battery voltage is
running low, a warning code 174 will appear in the Driver Information
Centre.
1. Switch off immediately any electrical consumers which are
not required for a safe drive, e.g.
seat heating, heated windscreen
and heated rear window or other
main consumers.
2. Charge the vehicle 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 vehicle battery cannot be
recharged, have the cause of the fault
remedied by a workshop.Vehicle personalisation
The vehicle's behaviour can be
personalised by changing the settings in the Info-Display.
Some of the personal settings for
different drivers can be memorised
individually for each vehicle key.
Memorised settings 3 22.
Depending on vehicle equipment and
country-specific regulations, some of
the functions described below might
not be available.
Some functions are only displayed or
active when the engine is running.
Personal settings Graphic-Info-Display
Press CONFIG for the Settings menu.
Turn the MENU-TUNE control to
move to the desired setup menu, and
then press MENU-TUNE .
Select Settings and then Vehicle
settings .
Vehicle settings
● Climate and air quality
Auto fan speed : Modifies the
level of the cabin airflow of the
climate control in Automatic
mode.
Lighting121Activating
1. Switch off the ignition.
2. Remove the ignition key.
3. Open driver's door.
4. Pull the turn signal lever.
5. Close the driver's door.
If the driver's door is not closed the
lights switch off after two 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 Info-Display. Vehicle personalisation
3 105.
The settings can be saved for the key
being used 3 22.
Battery discharge protection
Vehicle battery state of charge
function
The function guarantees longestvehicle battery life via a generator
with controllable power output and
optimised power distribution.
To prevent discharge of the vehicle
battery when driving, the following
systems are reduced automatically in two stages and finally switched off:
● heated rear window
● heated windscreen
● heated mirrors
● heated seats
● fan
In the second stage, a message
which confirms the activation of the
vehicle battery discharge protection
will be displayed in the Driver
Information Centre.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.
Driving and operating133Driving hints
Control of the vehicle
Never coast with engine not
running
Many systems will not function in this
situation (e.g. brake servo unit, power
steering). Driving in this manner is a
danger to yourself and others.
All systems function during an
Autostop.
Stop-start system 3 135.
Idle boost
If charging of the vehicle battery is
required due to battery condition, the
power output of the generator must
be increased. This will be achieved by an idle boost which may be audible.
A message appears in the Driver
Information Centre.
Pedals
To ensure the pedal travel is
uninhibited, there must be no mats in
the area of the pedals.Use only floor mats, which fit properly and are fixed by the retainers on the
driver side.
Driving downhill
Engage a gear when driving downhill
to ensure that sufficient brake
pressure is available.Starting and operating
New vehicle running-in Do not brake unnecessarily hard for
the first few journeys.
During the first drive, smoke may
occur because of wax and oil
evaporating off the exhaust system.
Park the vehicle in the open for a
while after the first drive and avoid
inhaling the fumes.
During the running-in period, fuel and engine oil consumption may be
higher.
Additionally, the cleaning process of
the diesel particle filter may take
place more often.
Diesel particle filter 3 139.
Autostop may be inhibited to allow for charging of the vehicle battery.
Ignition switch positions Turn key:
Driving and operating135Turn key briefly to position 3 and
release: an automatic procedure
operates the starter after a brief
delay, until 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
Diesel engines
The start of the engine without
additional heaters is possible down to
-25 °С.
Petrol engines
The start of the engine without
additional heaters is possible down to -30 °C.
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 requires 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 need 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 occurredTurbo 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.
Overrun cut-off
The fuel supply is automatically cut-
off during overrun, i.e. when the
vehicle is driven with a gear engaged but accelerator is released.
Stop-start system The stop-start system helps to save
fuel and to reduce the exhaust
emissions. When conditions allow, it
switches off the engine as soon as the
vehicle is at a low speed or at a
standstill, e.g. at a traffic light or in a
traffic jam.
On vehicles with manual
transmission, the engine is started automatically as soon as the clutch is
depressed.
Driving and operating143Fault
In the event of a fault, control indicator g illuminates. Additionally, a
message is displayed in the Driver
Information Centre. Vehicle
messages 3 102.
The transmission no longer shifts
automatically. Continued travel is possible with manual shifting.
Only the highest gear is available.
Depending on the fault, 2nd gear may also be available in manual mode.
Shift only when the 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
3 227.If the vehicle battery is not the cause
of the fault, release the selector lever.
1. Apply the parking brake.
2. Release the selector lever trim from the centre console; Poke
with a finger into the leather
socket in front of the selector lever
and push the trim upwards at the
front rim from below, as shown in
the illustration. Rotate trim to the
left.
3. Push down the release lever and move the selector lever out of P or
N . If these positions are engaged
again, the selector lever will be
locked in position again. Have the cause of the power supply
interruption remedied by a
workshop.
4. Mount the selector lever trim onto
the centre console and refit.