Page 22 of 217

20Keys, doors and windows
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
■ Central locking system
■ Comfort settingsThe saved settings are automatically used the next time the memorised key
is inserted into the ignition switch and
turned to position 1 3 120.
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 98.
Central locking system
Unlocks and locks doors, load
compartment and fuel filler flap.
A pull on an interior door handle
unlocks the respective door. Pulling the handle once more opens the door.
Notice
In the event of an accident in which
airbags or belt pretensioners are
deployed, the vehicle is
automatically unlocked.
Notice
A short time after unlocking with the
remote control the doors are locked
automatically if no door has been
opened.Unlocking
Press button c.
Two settings are selectable: ■ To unlock only the driver's door, load compartment and fuel filler
flap, press button c once. To unlock
both doors, press button c twice
or
■ press button c once to unlock
doors, load compartment and fuel
filler flap
The setting can be changed in the
Info-Display.
Vehicle personalisation 3 98.
Page 95 of 217
Instruments and controls93Vehicle messages
Messages are indicated mainly in the
Driver Information Centre (DIC), in
some cases together with a warning and signal buzzer.
Press the SET/CLR button, the
MENU button or turn the adjuster
wheel to confirm a message.
Vehicle messages on the
Midlevel-Display
The vehicle messages are displayed
as code numbers.
No.Vehicle message1Change engine oil2No radio remote control
detected, depress clutch pedal
for a restart3Engine coolant level low4Air conditioning offNo.Vehicle message5Steering wheel is locked7Turn steering wheel, switch
ignition off and then on9Turn steering wheel, start
engine again12Vehicle overloaded13Compressor overheated15Centre high-mounted brake
light failure16Brake light failure17Headlight levelling malfunction18Left low beam failure19Rear fog light failure20Right low beam failure21Left sidelight failure22Right sidelight failure23Reversing light failure24Number plate light failure
Page 96 of 217

94Instruments and controls
No.Vehicle message25Left front turn signal failure26Left rear turn signal failure27Right front turn signal failure28Right rear turn signal failure35Replace battery in radio remote
control48Clean side blind spot alert
system53Tighten gas cap56Tyre pressure imbalance on front axle57Tyre pressure imbalance on
rear axle58Winter tyres detection59Open and then close driver
window60Open and then close front
passenger window66Service theft alarm systemNo.Vehicle message67Service steering wheel lock68Service power steering75Service air conditioning76Service side blind spot alert
system79Top up engine oil82Change engine oil soon84Engine power reduced89Service vehicle soon95Service airbag120Reduce speed for hill decent
control128Bonnet open134Park assist fault, clean bumper136Service parking assist174Low vehicle battery258Park assist offVehicle messages on the
Uplevel-Display
The vehicle messages are displayed
as text. Follow the instructions given
in the messages.
The system displays messages
regarding the following topics:
■ Fluid levels
■ Anti-theft alarm system
■ Brakes
■ Ride control systems
■ Cruise control, Speed limiter
■ Parking assist systems
Page 113 of 217

Climate control111
Demisting and defrosting the
windows
■ Set temperature control to warmest
level.
■ Set fan speed to highest speed.
■ Set air distribution control to l.
■ Switch on heated rear window Ü.
■ Open side air vents as required and
direct them towards door windows.
■ For simultaneous warming of the foot well, set air distribution control
to J.
Notice
If air distribution mode l is selected
while engine is running, an Autostop
will be inhibited until another air
distribution is selected.
If air distribution mode l is selected
while the engine is in an Autostop,
the engine will restart automatically.
Stop-start system 3 121.
Air conditioning systemIn addition to the heating and
ventilation system, the air
conditioning system has controls for:n=cooling4=air recirculation
Heated seats ß 3 34, Heated
steering wheel * 3 70.
Cooling n
Press button n
to switch on cooling.
Activation is indicated by the LED in
the button. Cooling is only functional
when the engine is running and
climate control fan is switched on.
Page 114 of 217

112Climate control
Press button n again to switch off
cooling.
The air conditioning system cools and
dehumidifies (dries) as soon as the
outside temperature is slightly above
the freezing point. Therefore
condensation may form and drip from under the vehicle.
If no cooling or drying is required,
switch off the cooling system for fuel
saving reasons. Activated cooling
might inhibit Autostops.
Stop-start system 3 121.
Air recirculation system 4Press button to activate air
recirculation mode. Activation is
indicated by the LED in the button.
Press button 4 again to deactivate
recirculation mode.9 Warning
The exchange of fresh air is
reduced in air recirculation mode.
In operation without cooling the air humidity increases, so the
windows may mist up from inside.
The quality of the passenger
compartment air deteriorates,
which may cause the vehicle
occupants to feel drowsy.
In warm and very humid ambient air conditions, the windscreen might mist up from outside, when cold air is
directed to it. If windscreen mists up
from outside, activate windscreen
wiper and deactivate l.
Maximum cooling Briefly open the windows so that hot
air can disperse quickly.
■ Switch on cooling n.
■ Air recirculation system 4 on.
■ Set temperature control to coldest level.
■ Set fan speed to highest level.
■ Set air distribution control to M.
■ Open all vents.
Page 118 of 217

116Climate control
Air distribution
Turn right rotary knob for desired
adjustment. Setting is indicated in the Info-Display.
K=to foot well9=to windscreen, front door
windows and foot wells=to windscreen and front door
windowsM=to head area via adjustable air
ventsL=to head area and foot well
Return to automatic air distribution:
press button AUTO.
Cooling n
Press button
n to switch on cooling.
Activation is indicated by the LED in
the button. Cooling is only functional
when the engine is running and
climate control fan is switched on.
Press button n again to switch off
cooling.
The air conditioning system cools and
dehumidifies (dries) as soon as the
outside temperature is slightly above
the freezing point. Therefore
condensation may form and drip from under the vehicle.
If no cooling or drying is required,
switch off the cooling system for fuel
saving reasons. When the cooling
system is switched off, no engine restart will be requested by the
climate control system during an
Autostop. Exception: defrost system
is activated and outside temperature
above 0° C requests a restart.
The status of cooling operation is
indicated in the Info-Display.
Activation or deactivation of cooling
operation after engine start can be
changed in the Info-Display. Vehicle
personalisation 3 98.
Page 119 of 217

Climate control117
Air recirculation mode 4
Press button
4 to activate air
recirculation mode. Activation is
indicated by the LED in the button.
Press button 4 again to deactivate
recirculation mode.
9 Warning
The exchange of fresh air is
reduced in air recirculation mode.
In operation without cooling the air humidity increases, so the
windows may mist up from inside.
The quality of the passenger
compartment air deteriorates,
which may cause the vehicle
occupants to feel drowsy.
In warm and very humid ambient air conditions, the windscreen might mist up from outside, when cold air is
directed to it. If windscreen mists up
from outside, activate windscreen
wiper and deactivate s.
Basic settings Some settings can be changed in the
Info-Display. Vehicle personalisation
3 98.
Air vents
Adjustable air vents
At least one air vent must be open
while the cooling is on.
Adjust the air amount at the vent
outlet by turning the adjuster wheel.
The vent is closed when the adjuster wheel is turned close to the left or
right.
Page 120 of 217

118Climate control
Direct the flow of air by tilting and
swivelling the slats.
9 Warning
Do not attach any objects to the
slats of the air vents. Risk of
damage and injury in case of an
accident.
Fixed air vents
Additional air vents are located
beneath the windscreen and door windows and in the foot wells.
Maintenance
Air intake
The air intake in front of the
windscreen in the engine
compartment must be kept clear to
allow air intake. Remove any leaves,
dirt or snow.
Pollen filter
The pollen filter cleans dust, soot,
pollen and spores from the air
entering the vehicle through the air
intake.
Air conditioning regular
operation In order to ensure continuously
efficient performance, cooling must
be operated for a few minutes once a
month, irrespective of the weather
and time of year. Operation with
cooling is not possible when the
outside temperature is too low.
Service
For optimal cooling performance, it is recommended to annually check the
climate control system, starting
three years after initial vehicle
registration, including:
■ Functionality and pressure test■ Heating functionality
■ Leakage check
■ Check of drive belts
■ Cleaning of condenser and evaporator drainage
■ Performance check