– Switches Air Care on and off ⇒ Air Care Climatronic.
– Locks the rear temperature selectors ⇒ Rear controls.
– Opens the auxiliary heater menu ⇒ Auxiliary heater and ventilation.
– Switches windscreen heating on and off ⇒ Windscreen heating.
– Switches steering wheel heating on and off ⇒ Steering wheel heating.
– Switches the seat heating on and off ⇒ Seat heating.
– General settings submenu
Automatic air recirculation – Switches automatic air recirculation mode on and off ⇒ Air
recirculation mode.
Automatic auxiliary heater – Allows or prevents auxiliary heating ⇒ Fuel and emission
control.
Automatic windscreen heating – Switches automatic windscreen heating on and off
⇒ Windscreen heating.
– Submenu for air conditioning settings
– Adjusts the blower speed.
– Switches cooling system on and off.
– Air distribution to the upper body via the vents in the dash panel.
– Air distribution to footwell.
– Air distribution to the windscreen.
– Switches air recirculation mode on and off.
Presettings – submenu for presettings
– Switches automatic mode on.
– Switches maximum cooling output on or off.
– Switches the defrost function on or off.
– Display for manual control of the cooling system.
Air conditioning profiles
Air con. profile – Adjusts the blower speed in mode.
Rear controls
Fig. 111 In the rear centre console: controls for the rear seats.
First read and observe the introductoryinformation and safety warnings⇒
Introduction
Temperature
•Press the and ⇒ Fig. 111 buttons to set the temperature.
Setting the temperature using the Infotainment system
•Press the button on the control panel.
•Touch the function button for the temperature for the rear row of seats.
•Touch the and function buttons to set the temperature.
The display now shows the set temperature.
– Seat heating
Press the buttons or to switch the seat heating on and off ⇒ Seat heating.
If the function button is activated in the Infotainment system, it is not possible to
operate the rear controls.
Air recirculation mode
First read and observe the introductoryinformation and safety warnings⇒
Introduction
In air recirculation mode, no outside air enters the vehicle interior.
Manual air recirculation mode
•Press the button on the control panel to switch manual air recirculation mode on
and off.
Automatic air recirculation mode (Climatronic)
In automatic air recirculation mode, fresh air will enter the vehicle interior. The air recirculation
mode will switch on automatically if the system detects an increase in the concentration of noxious
substances in the outside air. The air recirculation mode will switch off as soon as the level of
noxious substances has returned to normal. The system cannot detect unpleasant odours.
•Press the button on the control panel.
•Touch function button .
•Touch the Automatic air recirculation function button.
Air recirculation mode with Air Care Climatronic
The vehicle is fitted with an allergen filter. When Air Care is activated ⇒ Air Care Climatronic, the
air recirculation mode of the air conditioning system is maximised as far as is permitted by the risk
of window fogging depending on the interior humidity and outside temperature. The air recirculation
mode is automatically regulated and features continuous adjustment in order to prevent fatigue of
the vehicle occupants.
When is the air recirculation mode deactivated?
Air recirculation mode is deactivated in the following situations ⇒:
•If the button on the Climatronic control panel is pressed.
•If the air distribution regulator of the manual air conditioning system is turned to position.
•If the sensor detects that the vehicle's windows might mist up.
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.
•m/k/a999MK Climatronic
If the outside temperature is very high, brief activation of manual air recirculation mode helps
to cool the vehicle interior more quickly.
Seat heating
First read and observe the introductoryinformation and safety warnings⇒
Introduction
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, the windows can mist up very quickly in air
recirculation mode and reduce visibility considerably.
•Switch off the air recirculation mode when it is no longer required.
WARNING
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 evaporator and the dust and pollen
filter with pollution filter insert, producing a lasting unpleasant odour.
NOTICE
The seat cushions and backrests can be heated electrically when the ignition is switched on.
Operating the seat heating
•Press the button or in the control panel in order to switch the seat heating to
the highest setting.
•Press the or button until the desired setting is reached.
•To switch the seat heating off, press the button or repeatedly until the LEDs go
out.
If the ignition is turned on again within around 10 minutes, the most recent driver seat temperature
setting is automatically activated.
When is it not advisable to switch on the seat heating?
Do not switch on the seat heating if one of the following conditions applies:
•The seat is not occupied.
•The seat is fitted with a protective cover.
•A child seat is installed on the seat.
•The seat cushion is damp or wet.
•The temperature in the vehicle interior or the outside temperature is above +25°C (77°F).
To save fuel, only switch on the seat heating for as long as necessary.
Steering wheel heating
First read and observe the introductoryinformation and safety warnings⇒
Introduction
The steering wheel heating works when the engine is running.
Switching steering wheel heating on and off automatically via the
Infotainment system
•m/k/a995MKManual air conditioning system: press the button on the
Infotainment system and touch the Vehicle and function buttons.
•m/k/a995MKClimatronic: press the button on the control panel.
•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 in vehicles with Climatronic)
•Press the button on the control panel.
Anyone experiencing reduced sensitivity to pain or temperature due to medication,
paralysis or chronic illness (e.g. diabetes) could sustain burns on the back, buttocks and
legs when using the seat heating. These burns may take a long time to heal or may never
heal fully. Please consult a doctor if you have questions about your own state of health.
•Anyone experiencing reduced sensitivity to pain or temperature should never use the
seat heating.
WARNING
Wet upholstery can cause a fault in the seat heating and increase the risk of burns.
•Ensure that the seat cushion is dry before the seat heating is used.
•Do not sit on the seat when wearing damp or wet clothing.
•Do not set any damp or wet objects or items of clothing on the seat.
•Do not spill any liquids on the seat.
WARNING
•To avoid damaging the heating elements, do not kneel on the seat or apply sharp
pressure at a single point on the seat cushion and backrest.
•Liquids, sharp objects and insulating materials, such as a protective cover or child
seat, may damage the seat heating.
•If the system starts to produce an odour, switch off the seat heating immediately and
have it checked by a qualified workshop.
NOTICE
•Touch the function button.
•Touch the Steering wheel & seat heating linked function button to pair the steering
wheel heating with the seat heating.
•Press the button to switch the steering wheel heating on or off with the seat heating.
Selecting a temperature setting (only in vehicles with Climatronic)
•Press the button on the control panel.
•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's seat switched off (if
Steering wheel & seat heating linked is active).
•Power consumption too high.
•Fault in steering wheel heating system.
Windscreen heating
First read and observe the introductoryinformation and safety warnings⇒
Introduction
The windscreen heating works when the engine is running.
Manual windscreen heating
•m/k/a995MKManual air conditioning system: press the button on the
Infotainment system and touch the Vehicle and Settings function buttons.
•m/k/a995MKClimatronic: press the button on the control panel.
•Touch the function button to switch windscreen heating on or off.
The windscreen heating switches itself off depending on the outside temperature or after 8 minutes
at the latest.
Automatic windscreen heating
The windscreen heating switches on automatically if there is a risk of condensation building up on
the windscreen or windows.
•Press the button on the control panel.
•Touch the function button in the Infotainment system.
•Touch the Automatic windscreen heating function button to switch automatic
windscreen heating on or off.
The automatic windscreen heating is also active when the air conditioning system is switched off.
Windscreen heating using the defrost function
The windscreen heating will be switched on when the defrost function is switched on and a sensor
detects that the windscreen may mist up.
Switch-off conditions
The windscreen heating switches itself off if one of the following conditions is met:
•Power consumption too high.
•Fault in air conditioning system.
•Specified time has elapsed.
Tips and usage notes
First read and observe the introductoryinformation and safety warnings⇒
Introduction
The following tips and operating information will help you use the system correctly.
Why does the cooling system switch off automatically or cannot be
switched on?
•The engine is not running.
•The blower is switched off.
•The air conditioning system fuse has blown.
•The ambient temperature is lower than approximately +3°C (+38°F).
•The air conditioning compressor of the cooling system has been temporarily switched off
because the engine coolant temperature is too high.
•There is a vehicle fault. The air conditioning system should be checked by a qualified workshop.
Settings for optimal road visibility
•Keep the air intake in front of the windscreen free from ice, snow or leaves to improve the
heating and cooling performance and prevent condensation on the windows ⇒ Vehicle care.
•Do not cover the air vents in the rear of the luggage compartment to allow air to flow through
the vehicle from the front to the rear.
•The maximum heating output and the fastest window defrosting results are achieved when the
coolant has reached its operating temperature.
Recommended settings for the heating and fresh air system or manual air
conditioning system
•Switch off air recirculation mode.
•Set blower to setting or .
•Set the temperature selector to the middle position.
•Open and position all vents on the dash panel.
•Turn the air distribution regulator to the desired position.
•Manual air conditioning system: press the button on the control panel to switch the
cooling system on.
Recommended Climatronic setup
•Press the button.
•Set the temperature to +22°C (+72°F).
•Open and position the vents on the dash panel.
Air Care Climatronic
The allergen filter of Air Care Climatronic can additionally reduce the amount of pollutants and also
allergens that enter the vehicle interior.
The filters must be changed regularly to avoid impairing the performance of the air conditioning
system. If the vehicle is frequently used in severely polluted air, the filter must be replaced between
service events.
•Press the button on the control panel.
•Touch the Air Care function button.
•Touch the Active function button to switch the Air Care function on or off.
Dust and pollen filter
The dust and pollen filter must be replaced regularly to prevent impaired performance of the manual
air conditioning system. If the vehicle is frequently used in severely polluted air, the filter must be
replaced between service events.
Water under the vehicle
If the humidity and temperature outside the vehicle are high, condensation can drip off the
evaporator in the cooling system and form a pool underneath the vehicle. This is normal and does
not indicate a leak.
If the outside humidity is high and the outside temperature low, condensation may evaporate when
the auxiliary heater is running ⇒ Auxiliary heater and ventilation. If this is the case, steam may
appear underneath the vehicle. This is not a sign that the vehicle is damaged.
Auxiliary heater and ventilation
Introduction
This chapter contains information on the followingsubjects:
⇒ Switching the auxiliary heater and auxiliary ventilation on and off
⇒ Programming the auxiliary heater and auxiliary ventilation
⇒ Remote control
The auxiliary heater and ventilation
system allows the vehicle interior to be
heated in winter and ventilated in
summer. Operation of the system
allows ice, condensation and a thin
covering of snow to be cleared 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 supplied with power by the
12-volt vehicle battery.
Auxiliary heater exhaust system
The emissions produced by the auxiliary heater are removed via an exhaust pipe fitted underneath
the vehicle. The exhaust pipe must not be blocked by snow, mud or other objects.
Switching the auxiliary heater and auxiliary ventilation on and off
First read and observe the introductoryinformation and safety warnings⇒
Introduction
The auxiliary heating can be operated only when the ignition is switched off. If the ignition is
switched on while the auxiliary heater is working, the auxiliary heater continues to run to provide
additional heat.
Switching on the auxiliary heater
•Press the immediate heat button on the control panel ⇒ Front controls.
•Press the button on the remote control ⇒ Remote control.
•Program a departure time ⇒ Programming the auxiliary heater and auxiliary ventilation.
The auxiliary heater heats up the vehicle interior to a temperature of at least 22°C.
The auxiliary heater will not switch on if the 12-volt vehicle battery has a low charge level or the fuel
tank is empty.
Switching off the auxiliary heater manually
•Press the immediate heat button on the control panel ⇒ Front controls.
•Press the button on the remote control ⇒ Remote control.
•Touch the function button in the Infotainment system ⇒ Programming the auxiliary heater
and auxiliary ventilation.
Auxiliary heater switches off automatically
•When the programmed departure time is reached, or after the programmed operating period
has elapsed ⇒ Programming the auxiliary heater and auxiliary ventilation.
•If the indicator lamp or lights up (fuel gauge) ⇒ Fuel gauge.
•If the charge level of the 12-volt vehicle battery is too low ⇒ 12-volt vehicle battery.
The fumes from the auxiliary heater contain among other things carbon monoxide, which
is an odourless and colourless poisonous gas. Carbon monoxide can cause people to
lose consciousness. It can also cause death.
•Never start or run the auxiliary heater in unventilated or closed rooms.
•Never programme the auxiliary heater so that it is switched on and run in unventilated
or enclosed spaces.
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.
WARNING
Do not place any food, medicine or any other temperature-sensitive items in front of the
vents. Heat-sensitive food, medicine and other items could be either damaged or rendered
useless.
NOTICE
The auxiliary heater runs on for a short time after it is switched off manually or automatically so that
the remaining fuel in the system can be burnt off.
When the vehicle is at a standstill, the auxiliary heater can be activated up to three times in
succession for the maximum operating duration.
Operating noises can be heard if the auxiliary heater is switched on.
The 12-volt battery will discharge if the auxiliary heater or ventilation is run several times
over an extended period. Drive the vehicle for an appropriate distance in order to recharge the 12-
volt vehicle battery.
When parked on an incline, the fuel gauge indication (just above the reserve quantity) may
be inaccurate and lead to functional restrictions of the auxiliary heater.
The auxiliary heater may switch on automatically as a supplementary heating measure when
the engine is started at temperatures below +5°C (+41°F). The supplementary heating function is
switched off again automatically after a short time.
Programming the auxiliary heater and auxiliary ventilation
First read and observe the introductoryinformation and safety warnings⇒
Introduction
Opening the Auxiliary heater menu
The auxiliary heater is programmed in the Infotainment system.
m/k/a997MK Manual air conditioning system
•Press the button on the Infotainment system.
•Touch the Vehicle and function buttons.
m/k/a997MK Climatronic
•Press the button on the control panel.
•Touch the function button.
Changing the operating mode
•Open the Auxiliary heater menu.
•Touch the Heating or Ventilation function buttons to change the operating mode.
At high outside temperatures, the auxiliary ventilation function supplies fresh air to the vehicle
interior and helps prevent a build-up of heat.
Programming the auxiliary heater
Activation is always for one heating or ventilation period only. The departure time must be activated
for every start.
•Before programming, check that the date and time set in the vehicle are correct ⇒ Vehicle
settings menu.
•Open the Auxiliary heater menu.
•Press the Adjust button.
•Choose one of the memory locations for a Departure time.
•Touch the Activate function button.
m/k/a995MKManual air conditioning system: the programmed departure time determines
the time at which the auxiliary heater or ventilation should switch off. The point at which the heating
or ventilation process starts is determined depending on the programmed operating period.
m/k/a995MK Climatronic: on the basis of the programmed departure time, the vehicle
automatically calculates the start time for heating or ventilation to the currently set temperature
depending on the outside temperature.
•Touch the Running time function button under Adjust to set the auxiliary heater
running time after the heater is switched on with the immediate heat button or using the
remote control.
Programming check
If a departure time has been activated, the LED in the immediate heat button will light up on
the Climatronic control panel for approximately ten seconds after the ignition is switched off.
Remote control
Fig. 112 Auxiliary heater: remote control (left) with battery compartment (right).
First read and observe the introductoryinformation and safety warnings⇒
Introduction
Switching the auxiliary heater on and off using the remote control
•m/k/a995MK Switch on: press the button ⇒ Fig. 112.
The auxiliary heater is switched on when the LED on the remote control lights up green.
•m/k/a995MKSwitch off: press the button ⇒ Fig. 112.
The auxiliary heater is switched off when the LED on the remote control lights up red.
LED in the remote control
The LED ⇒ Fig. 112② indicates various operating states after you press a button.
Lit up
GreenAuxiliary heater is switched on.RedAuxiliary heater is switched off.
Flashes irregularly
GreenAuxiliary heater disabled: the fuel tank is almost empty, the voltage of the 12-volt vehicle
battery is too low or a malfunction has occurred. Refuel and drive for a sufficiently long time in order
to charge the 12-volt vehicle battery or go to a qualified workshop.
Flashes regularly
Red or greenSwitch-on or switch-off signal not received. Reduce your distance from the vehicle.
Lights up or flashes
OrangeThe button cell (battery) in the remote control is weak. Replace the button cell.
Range
The remote control has a range of several hundred metres when the button cell is fully charged.
•Keep a distance of at least two metres between the remote control and vehicle.
•Avoid obstacles between the remote control and vehicle.
•Hold the remote control with the aerial⇒ Fig. 112① pointing vertically upwards.
•Do not cover the aerial.
Poor weather conditions or a weak button cell will significantly reduce the range.
Replacing the button cell in the remote control
The button cell in the remote control must be replaced if the indicator lamp no longer lights up.
•Insert a suitable object, e.g. a screwdriver, in the recess on the side ⇒ Fig. 112 in the direction
of the arrow.
Never programme the auxiliary heating system so that is switched on and run in
unventilated or enclosed spaces. The fumes from the auxiliary heater contain among other
things carbon monoxide, which is an odourless and colourless poisonous gas. Carbon
monoxide can cause people to lose consciousness. It can also cause death.
WARNING