Lighting119Battery discharge protection
Vehicle battery state of charge
function
The function guarantees longest
vehicle 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:
● auxiliary heater
● heated rear window and 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.
120Climate controlClimate controlClimate control systems.............120
Heating and ventilation system 120
Air conditioning system ...........121
Electronic climate control system .................................... 124
Auxiliary heater ........................128
Air vents ..................................... 129
Adjustable air vents .................129
Fixed air vents ......................... 130
Maintenance .............................. 130
Air intake ................................. 130
Air conditioning regular operation ................................ 131
Service .................................... 131Climate control systems
Heating and ventilation system
Controls for: ● temperature £
● air distribution l, M and K
● fan speed Z
● demisting and defrosting à
● heated rear window and exterior mirrors b
● heated seats ß
Temperature £
Adjust the temperature by turning
£ to the desired temperature.red area:warmerblue area:colder
Heating will not be fully effective until
the engine has reached normal
operating temperature.
Air distribution l M K
Press:
l:to windscreen and front door
windowsM:to head area and rear seats via
adjustable front air ventsK:to front and rear foot well and
windscreen
Combinations are possible.
Fan speed Z
Adjust the air flow by turning Z to the
desired speed.
to the right:increaseto the left:decrease
128Climate controlDemisting and defrosting the
windows à
● Press à. The LED in the button
illuminates to indicate activation.
● Temperature and air distribution are set automatically and the fan
runs at high speed.
● Switch on air conditioning by pressing A/C, if required.
● Switch on heated rear window b.
● Switch on heated windscreen ,.
● To return to previous mode press
à again, to return to automatic
mode press AUTO.
Note
If à is pressed while the engine is
running, an Autostop will be inhibited until à is pressed again.
If à is pressed while the engine is in
an Autostop, the engine will restart
automatically.
Stop-start system 3 138.
Deactivation of Electronic climate
control system
Cooling, fan and automatic mode can
be switched off by turning control dial
Z anticlockwise.
Activation by switching on the fan or
pressing AUTO.
Heated rear window, windscreen
and exterior mirrors b
3 39
Heated seats ß
3 47.Auxiliary heater
Air heater
Quickheat is an electric auxiliary air
heater which automatically warms up
the passenger compartment more
quickly.
Driving and operating137Automatic transmission: operate
brake pedal and move selector lever
to P or N.
Do not operate accelerator pedal.
Press and release Start/Stop: an
automatic procedure operates the
starter with a short delay until the engine is running.
Before restarting or to switch off the
engine when vehicle is stationary, press Start/Stop once more briefly.
Manual transmission: during an
Autostop, the engine can be started
by depressing the clutch pedal
3 138.
Automatic transmission: during an
Autostop, the engine can be started
by releasing the brake pedal 3 138.
Emergency shut off during driving If the engine needs to be switched offduring driving in case of emergency,
press Start/Stop for five seconds.9Danger
Switching off the engine during
driving may cause loss of power
support for brake and steering
systems. Assistance systems and
airbag systems are disabled.
Lighting and brake lights will
extinguish. Therefore power down the engine and ignition while
driving only when required in case of emergency.
Starting the vehicle at low
temperatures
Starting 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 requires a
warming phase of approx.
five minutes. The selector lever must
be in position P.
Heating functionalities
Note
Individual heating functionalities,
such as heated seats or heated
steering wheel, may be temporarily
unavailable in the event of electrical
loading constraints. Functions will
be resumed after some minutes.
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.
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 pedal is released.
Depending on driving conditions, the
overrun cut-off may be deactivated.
Driving and operating139● The engine exhaust temperatureis not too high, e.g. after driving
with high engine load.
● The ambient temperature is sufficient.
● The climate control system allows an Autostop.
● The brake vacuum is sufficient.
● The self-cleaning function of the diesel particle filter is not active.
Otherwise an Autostop will be
inhibited.
Certain settings of the climate control
system may inhibit an Autostop. See
Climate control chapter for more
details 3 121.
If an autostop is temporarily not
available, D flashes green 3 95.
Immediately after driving at a higher
speed an Autostop may be inhibited.
New vehicle running-in 3 133.
Vehicle battery discharge protection
To ensure reliable engine restarts, several vehicle battery discharge
protection features are implemented
as part of the stop-start system.Power saving measures
During an Autostop, several electrical
features such as auxiliary electric
heater or rear window heating are
disabled or switched to a power
saving mode. The fan speed of the
climate control system is reduced to save power.
Restart of the engine by the driver
Vehicles with manual transmissionConventional restart
All engines have conventional restart.
Depress the clutch pedal without
depressing the brake pedal to restart
the engine.
On engines with late restart a
conventional restart is only possible
without depressed brake pedal.
Restart of the engine by the stop-
start system
The selector lever must be in neutral to enable an automatic restart.
If one of the following conditions
occurs during an Autostop, the
engine will be restarted automatically
by the stop-start system:
● The stop-start system is manually deactivated.
● The driver's seat belt is unfastened or 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 climate control system requests an engine start.
● The air conditioning is manually switched on.
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.
142Driving and operatingAdBlue
General information The selective catalytic reduction
(BlueInjection) is a method to
substantially reduce the nitrogen
oxides in the exhaust emission. This
is achieved by injecting a Diesel
Exhaust Fluid (DEF) into the exhaust system. The ammonia released by
the fluid reacts with nitrous gases
(NO x) from the exhaust and turns it
into nitrogen and water.
The designation of this fluid is
AdBlue ®
. It is a non-toxic, non-
flammable, colourless and odourless
fluid which consists of 32% urea and
68% water.9 Warning
Avoid contact of your eyes or skin
with AdBlue.
In case of eye or skin contact,
rinse off with water.
Caution
Avoid contact of the paintwork with AdBlue.
In case of contact, rinse off with water.
AdBlue freezes at a temperature of
approx. -11 °C. As the vehicle is
equipped with an AdBlue pre-heater,
the emissions reduction at low
temperatures is ensured. The AdBlue
pre-heater works automatically.
Level warnings
The AdBlue consumption is
approximately 0.7 litres per 1000 km.
The consumption can be higher
depending on driving behaviour (e.g.
high load or towing).
Depending on the calculated range of AdBlue, different messages are
displayed in the Driver Information
Centre. The messages and the
restrictions are a legal requirement.
The first possible warning message appears at an AdBlue range below
2400 km, shows up at each start and each 300 km range reduction:
Top up AdBlue: Starting impossible in 2400 km
Additionally, control indicator Y
illuminates continuously and a chime
sounds with every message pop-up.
At an AdBlue range below 600 km,
the following warning message is
being displayed, shows up at each
start and each 20 km range reduction:
Top up AdBlue: Starting impossible in 600 km
Additionally, control indicator Y
flashes continuously and a chime
sounds with every message pop-up.
Note
In case of high AdBlue consumption,
the Driver Information Centre may
display this warning without the
previous warning stages.
The last warning level is entered
when the AdBlue tank is empty.
Restart of the engine is not possible.
Driving and operating179LPG consists mainly of propane and
butane. The octane rating is between
105 and 115, depending on the
butane proportion. LPG is stored as a
liquid at a pressure of approximately
five to ten bar.
The boiling point depends on the
pressure and the mixing ratio. At
ambient pressure, it is between
-42 °C (pure propane) and -0.5 °C
(pure butane).Caution
The system works at an ambient
temperature of approx. -8 °C to
100 °C.
Full functioning of the LPG system can only be guaranteed with liquid
gas which complies with the minimum
requirements of DIN EN 589.
Refuelling9 Danger
Before refuelling, switch off
ignition and any external heaters
with combustion chambers.
Follow the operating and safety
instructions of the filling station
when refuelling.
9 Danger
Fuel is flammable and explosive.
No smoking. No naked flames or
sparks.
If you can smell fuel in your
vehicle, have the cause of this
remedied immediately by a
workshop.
Caution
In case of misfuelling, do not
switch on ignition.
Fuel filler flap is located at left rear
side of vehicle.
250IndexAAccessories and vehicle modifications .......................... 185
Active emergency braking ..........157
Adaptive forward lighting ...........113
AdBlue .................................. 94, 142
Adjustable air vents ...................129
Advanced parking assist ............164
Airbag and belt tensioners ...........91
Airbag deactivation ................57, 91
Airbag label................................... 52 Airbag system .............................. 52
Air conditioning regular operation ................................ 131
Air conditioning system .............. 121
Air intake .................................... 130
Air vents...................................... 129
Antilock brake system ................ 149
Antilock brake system (ABS) .......92
Anti-theft alarm system ................33
Anti-theft locking system .............. 32
Appearance care ........................221
Armrest ................................... 47, 48
Ashtrays ....................................... 81
Automatic anti-dazzle ..................37
Automatic light control ...............112
Automatic locking ........................29
Automatic transmission .............145
Autostop ............................... 95, 138
Auxiliary heater ........................... 128B
Battery discharge protection ......119
Battery voltage ........................... 102 Belts.............................................. 49
BlueInjection ............................... 142
Bonnet ....................................... 187
Brake and clutch fluid .................226
Brake and clutch system .............92
Brake assist ............................... 150
Brake fluid .................................. 190
Brakes ............................... 149, 190
Breakdown.................................. 219
Bulb replacement ....................... 192
C
Capacities .................................. 238
Catalytic converter .....................141
Central locking system ................25
Centre console lighting ..............118
Centre console storage ...............66
Changing tyre and wheel size ...209
Charging system .......................... 91
Child locks ................................... 30
Child restraint installation locations ................................... 61
Child restraints.............................. 58
Child restraint systems ................58
Cigarette lighter ........................... 81
Climate control ............................. 16
Climate control systems .............120