steam if a valid vehicle key is simultaneously within the operating range. If at least one window is
open and sensor surfaces on the door handles are continuously activated, all windows will close. All
windows could open if the jet of water or steam is moved away from the door handle sensors briefly
and then moved back again
It may not be possible to lock or unlock the vehicle using the Keyless Access if the 12-volt vehicle
battery or button cell in the vehicle key is weak or discharged. The vehicle can be locked or unlocked
manually
If there is no valid vehicle key in the vehicle or if it is not detected, a corresponding message will be
shown on the instrument cluster display. This may occur if the vehicle key is exposed to interference
from another radio signal or is covered by another item, e.g. an aluminium case Starting and
stopping the engine
Anti-theft alarm
Depending on the vehicle equipment level, the vehicle may have an anti-theft alarm.
The anti-theft alarm is activated automatically when the vehicle is locked using the vehicle key.
The anti-theft alarm outputs acoustic and visual warning signals for up to five minutes.
When does the system trigger an alarm?
If a door is opened.
If the bonnet is opened.
If the boot lid is opened.
If the ignition is switched on with a valid vehicle key. (The alarm may sound briefly.)
If the 12-volt vehicle battery is disconnected.
If there is movement inside the vehicle (in vehicles with interior monitoring) Interior monitoring
system and anti-tow alarm
If the vehicle is lifted or towed (vehicles with anti-tow alarm) Interior monitoring system and anti-
tow alarm
If the vehicle is transported on a car ferry or by rail (vehicles with anti-tow alarm or interior
monitoring) Interior monitoring system and anti-tow alarm
If a trailer that is connected to the anti-theft alarm system is removed Trailer towing
Switching off the alarm
Unlock the vehicle using the unlocking button on the vehicle key.
66 In the roof: button for the glass roof.
The term glass roof is used as a standard term for the panorama sliding/tilting roof.
The glass roof is a roof opening system featuring two glass elements. The rear glass element is fixed
and cannot be opened.
The button has two positions. First stage: fully or partially tilt, open or close the roof. Second
stage: automatically move the roof to the respective limit position. Press the button again to stop
the one-touch function.
Tilting the glass roof: push the button Fig. 66to the first position. One-touch function: push
button to the second position.
Closing the tilted glass roof: push the button to the first position. One-touch function: push
button to the second position.
Opening the glass roof: push the button to the first position. One-touch function up to
convenience position: push button to the second position.
Closing the glass roof: push the button to the first position. One-touch function: push button
to the second position.
Stopping one-stop function of the opening or closing procedure: push button or again.
WARNING
Careless or unsupervised use of the glass roof can cause serious injuries.
Open and close the glass roof only when you are sure that nobody is obstructing the path of the
roof.
Always take all vehicle keys with you every time you leave the vehicle.
Never leave children or people requiring assistance alone in the car, particularly if they have access
to the vehicle key. Unsupervised use of the vehicle key can lock the vehicle, start the engine, switch
on the ignition and operate the glass roof.
The glass roof can still be opened or closed for a short time after the ignition has been switched off,
provided that the driver door or front passenger door are not opened.
NOTICE
To avoid damage during cold weather, clear any ice and snow off the vehicle roof before opening or
tilting the glass roof.
Always close the glass roof when you leave the vehicle or if it starts to rain. Any rain entering the
vehicle when the glass roof is open or tilted could cause significant damage to the electrical system.
This can result in further damage to the vehicle.
Lock the vehicle from the outside.
Automatic switch-off of side lights and parking lights
If the battery capacity is not sufficient for the side lights or parking light to remain switched on for
two hours, the 12-volt vehicle battery can be discharged to such an extent that it is no longer
possible to start the engine
In the case of standing times of more than two hours, the vehicle will detect a weak 12-volt vehicle
battery and switch off the side lights or parking light so that the engine can still be started.
WARNING
Accidents and serious injuries can occur if the vehicle is parked without sufficient illumination, as
other road users might have difficulty seeing the vehicle, or may not see it at all.
Always park the vehicle safely and with sufficient lighting. Observe any applicable local regulations.
If the vehicle lighting is required for several hours, switch on the right or left parking light if possible.
The illumination time of the parking light on one side is generally twice as long as for continuous
parking light on both sides of the vehicle.
Coming Home and Leaving Home function (orientation lighting)
The Coming Home and Leaving Home function lights up the area immediately surrounding the
vehicle when you get in or out of the vehicle in darkness.
Not in China: the Coming Home function is switched on manually. In contrast, the Leaving
Home function is controlled automatically by a rain/light sensor.
Only in China: the Coming Home and Leaving Home function is controlled automatically by a
rain/light sensor.
The switch-off delay can be adjusted and the function activated or deactivated in the Vehicle
settings menu in the Infotainment system Infotainment system controls and displays
Activating the Coming Home function
Not in China
Switch off the ignition.
Operate the headlight flasher for approximately one second.
The Coming Home lighting is switched on when the driver door is opened. The switch-off delay starts
when the last vehicle door or the boot lid has been closed.
Activating the Coming Home function
button in the air conditioning block to switch the auxiliary heater on and off when the
ignition is switched off
Touch the function button in the Infotainment system air conditioning settings to access the
Auxiliary heater menu Auxiliary heater and ventilation
The auxiliary heater provides additional heating when the ignition is switched on.
Blower
Turn the middle rotary control.
When Climatronic is in automatic mode, no blower speed is displayed in the rotary control.
Air recirculation mode
Press the button.
Air distribution
air distribution to the upper body via the vents in the dash panel.
air distribution to footwell.
air distribution to the upper body and the footwell.
air distribution to the windscreen and the footwell.
air distribution to the windscreen.
| Defrost function
Manual air conditioning system: turn the right rotary knob to position Fig. 91
Climatronic: press the button Fig. 92
Manual air conditioning system: in the defrost function, the air recirculation mode switches off
and the air conditioning compressor for the cooling system switches on in order to dehumidify the
air. When the defrost function is switched on, it is not possible to switch the air recirculation mode
on or the air conditioning compressor off1).
Rear window heating
Press to switch the rear window heating on or off while the engine is running.
The rear window heating will switch off after 10 minutes at the latest.
Recommended settings for manual air conditioning system
Switch off air recirculation mode.
Set blower to setting or .
position.
WARNING
Stale air can quickly make the driver tired and affect their concentration, which in turn can cause
collisions, accidents and serious injuries.
Never use the air recirculation mode for an extended period as no fresh air will enter the vehicle
interior.
If the cooling system is switched off, condensation can form on the windows very quickly in air
recirculation mode and reduce visibility considerably.
Switch off the air recirculation mode when it is no longer required.
NOTICE
In vehicles with an air conditioning system, do not smoke when the air recirculation mode is
switched on. The smoke can leave a residue on the cooling system evaporator and the dust and
pollen filter with pollution filter insert, producing a lasting unpleasant odour.
When reversing the vehicle, or when the wash and wipe system is being used, the air recirculation
mode will switch on to prevent odours from entering the vehicle interior.
Climatronic
If the outside temperature is very high, the manual air recirculation mode can be activated for a
short time to help cool the vehicle interior more quickly.
Seat heating
First read and observe the introductoryinformation and safety warnings
The seat cushions and backrests can be heated electrically when the engine is running.
Operating the seat heating
Press the or button in the air conditioning block in order to switch the seat heating to the
highest temperature setting.
Press the or button repeatedly until the desired setting is reached.
To switch the seat heating off, press the or button repeatedly until no LEDs are lit.
Steering wheel heating
First read and observe the introductoryinformation and safety warnings
The steering wheel heating works when the engine is running.
Switching the steering wheel heating on and off via the Infotainment system
Manual air conditioning system: press the button on the Infotainment system and
touch the Vehicle and function buttons.
Climatronic: open the air conditioning settings in the Infotainment system.
Touch the function button to switch the steering wheel heating on and off.
Switching the steering wheel heating on or off together with the seat heating (only for Climatronic)
Open the air conditioning settings in the Infotainment system.
Touch the function button.
Touch the Link seat/steering wheel heating function button to link the steering wheel heating with
the seat heating.
Press the button to switch the steering wheel heating on or off together with the seat heating.
Selecting a temperature setting (only for Climatronic)
Open the air conditioning settings in the Infotainment system.
Touch the function button.
Touch the Setting function button to select a temperature setting.
Three temperature settings are available. The selected setting is saved when the ignition is switched
off. The temperature setting for the steering wheel heating is unrelated to the temperature setting
for the seat heating.
Switch-off conditions
The steering wheel heating will be switched off automatically if one of the following conditions is
met:
Seat heating for the driver seat is switched off (if Link seat/steering wheel heating is active).
Power consumption is too high.
There is a fault in the steering wheel heating system.
Troubleshooting
First read and observe the introductoryinformation and safety warnings
The cooling system functions only when the engine is running and at ambient temperatures above
+3
Maximum heat output and the fastest possible defrosting of the windows are possible only when
the engine is running. Do not start your journey until you have good visibility.
To help ensure good visibility, make sure that you use the air conditioning system and the rear
window heating correctly.
Auxiliary heater and ventilation
Introduction
This chapter contains information on the followingsubjects:
Switching the auxiliary heater and ventilation on and off
Programming the auxiliary heater and ventilation
Remote control
The auxiliary heater and ventilation system can be used to heat the vehicle interior in the winter and
ventilate it in the summer. It is able to clear ice, condensation and a thin layer of snow from the
windscreen. The auxiliary heater is supplied with fuel from the vehicle fuel tank and can be operated
when the vehicle is stationary with the ignition switched off. The auxiliary ventilation system is
powered by the 12-volt vehicle battery.
Auxiliary heater exhaust system
The emissions generated by the auxiliary heater are discharged via an exhaust pipe underneath the
vehicle. The exhaust pipe must not be blocked by snow, mud or other objects.
WARNING
Among other things, the emissions from the auxiliary heater contain carbon monoxide, which is an
odourless and colourless poisonous gas. Carbon monoxide can cause people to lose consciousness. It
can also cause death.
Never switch on the auxiliary heater when the vehicle is in unventilated or closed rooms nor let the
auxiliary heater run in unventilated or closed rooms.
Never program the auxiliary heater so that it is switched on and runs in unventilated or closed
rooms.
WARNING
Parts of the auxiliary heater exhaust system become very hot. This can cause fires.
Park the vehicle so that no part of the exhaust system can come into contact with any inflammable
material underneath the vehicle, e.g. dry grass.