Page 23 of 247

Keys, doors and windows21
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 3 136.
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 withColour-Info-Display, the
personalisation is permanently
activated.
Vehicle personalisation 3 112.
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.
Page 107 of 247

Instruments and controls105
Turn■ to mark a menu option
■ to set a numeric value or to display
a menu option
Press (the outer ring) ■ to select or activate the marked option
■ to confirm a set value
■ to switch a system function on/off
BACK button
Press BACK to:
■ exit a menu without changing settings
■ return from a submenu to a higher menu level
■ delete the last character in a character sequence
Press and hold BACK for a few
seconds to delete the entire entry.
Vehicle personalisation 3 112,
Memorised settings 3 21.Vehicle 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, MENU 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 message2No radio remote control
detected, depress clutch pedal
for a restart3Engine coolant level low4Air conditioning off5Steering wheel is locked
Page 109 of 247

Instruments and controls107
No.Vehicle message69Service suspension system70Service level control system71Service rear axle74Service AFL75Service air conditioning76Service side blind zone alert
system79Top up engine oil81Service transmission82Change engine oil soon83Service adaptive cruise control84Engine power is reduced89Service vehicle soon94Shift to park before exiting95Service airbag128Bonnet open134Park assist fault, clean bumperNo.Vehicle message136Service parking assist174Low vehicle battery258Park assist off
Vehicle messages on the
Uplevel-Display or Uplevel-Combi-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
■ drive systems
■ ride control systems
■ cruise control
■ object detection systems
■ lighting, bulb replacement
■ wiper/washer system
■ doors, windows
■ radio remote control
■ seat belts
■ airbag systems
■ engine and transmission
■ tyre pressure
■ diesel particle filter
Page 117 of 247

Instruments and controls115
■Display Off :
See Infotainment system manual
for further information.
■ Map Settings :
See Infotainment system manual
for further information.
Vehicle Settings ■ Climate and Air Quality
Auto Fan Speed : Modifies the fan
regulation. Changed setting will be active after switching the ignition off
and on again.
Air Conditioning Mode : Activates or
deactivates cooling when switching
on the ignition or uses the last chosen setting.
Auto Demist : Activates or
deactivates auto demist.
Auto Rear Demist : Activates
automatically the rear heated
window.
■ Comfort and Convenience
Chime Volume : Changes the
volume of warning chimes.Personalisation by Driver :
Activates or deactivates the
personalisation function.
Auto Reverse Gear Wiper :
Activates or deactivates
automatically switching on of the
rear window wiper when reverse gear is engaged.
■ Collision Detection Systems
Park Assist : Activates or
deactivates the ultrasonic sensors.
■ Lighting
Vehicle Locator Lights : Activates or
deactivates the entry lighting.
Exit Lighting : Activates or
deactivates and changes the
duration of exit lighting.
■ Remote Lock/Unlock/Start
Remote Door Unlock : Changes the
configuration to unlock only the
driver's door or the whole vehicle
whilst unlocking.
■ Return to Factory Settings? :
Resets all settings to the default
settings.
Page 124 of 247
122LightingInterior lightingInstrument panel
illumination control
Brightness of the following lights can
be adjusted when the exterior lights
are on:
■ instrument panel illumination
■ Info-Display
■ illuminated switches and operation elements
Turn thumb wheel A until the required
brightness is obtained.
On vehicles with light sensor the
brightness can only be adjusted when the exterior lights are on and the light
sensor detects night conditions.
Interior lights
During entry and exit of the vehicle,
the front and rear courtesy lights
automatically switch on and then off
after a delay.
Notice
In the event of an accident with
airbag deployment the courtesy
lights are turned on automatically.
Front courtesy lightOperate rocker switch:w=automatic switching on
and offpress u=onpress v=off
Rear courtesy lights
Illuminate in conjunction with the front
courtesy light depending on rocker
switch position.
Page 128 of 247

126Climate control
Notice
If the settings for demisting and
defrosting are selected, an Autostop will be inhibited.
If the settings for demisting and
defrosting are selected while the
engine is in an Autostop, the engine will restart automatically.
Stop-start system 3 138.
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 40, Heated
steering wheel * 3 83.
Cooling n
Press 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 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.
Air recirculation system 4
Press 4 to activate air recirculation
mode. Activation is indicated by the
LED in the button.
Page 129 of 247

Climate control127
Press 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.
Maximum cooling
Briefly open the windows so that hot
air can disperse quickly.
■ Switch on cooling n.
■ Switch on air recirculation system 4 .
■ Press air distribution switch M.
■ Set temperature control to coldest level.
■ Set fan speed to highest level.
■ Open all air vents.
Demisting and defrosting the
windows V
■
Press V: fan automatically
switches to higher speed, the air
distribution is directed towards the
windscreen.
■ Set temperature control to warmest
level.
■ Switch on heated rear window Ü.
■ Open side air vents as required and
direct them towards the door
windows.
Page 133 of 247

Climate control131
Air distribution s, M , K
Press appropriate button for desired
adjustment. Activation is indicated by the LED in the button.
s=to windscreen and front door
windowsM=to head area via adjustable air
ventsK=to foot well
All combinations are possible.
Return to automatic air distribution:
press AUTO .
Cooling n
Press
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 n again to switch off cooling.
The air conditioning system cools and
dehumidifies (dries) when outside temperature is above a specific level. 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 3 138.
Depending on the vehicle equipment, the display will indicate AC when
cooling is activated or Eco when the
cooling is deactivated.
Activation or deactivation of cooling
operation after engine start can be
changed in the menu Settings in the
Info-Display. Vehicle personalisation
3 112.
Air recirculation system 4