– 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
•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
m/k/a995MK Vehicles with manual gearbox: change from first to second gear immediately
after setting off. Change to higher gears rapidly.
m/k/a995MK Vehicles with DSG dual clutch gearbox: accelerate slowly and avoid using the
kickdown function.
Gear-change indicator ⇒ Gear-change indicator.
Eco driving profile ⇒ Driving profile selection and 4MOTION Active Control.
Avoid full throttle
Never fully use the maximum speed of the vehicle. Driving at excessive speeds, e.g. above 130
km/h on the motorway, will increase air resistance and thus the amount of force needed to move
the vehicle.
Reduce idling
Drive off immediately with low revs. If you are stopped for a long period, do not allow the engine to
idle but switch it off, e.g. when in a traffic jam or at a railway crossing.
In vehicles with an activated start/stop system, the engine will switch off automatically when the
vehicle is stopping and when the vehicle is stationary ⇒ Start/stop system .
Refuel with moderation
A full fuel tank increases the weight of the vehicle. A fuel tank that is half to three quarters full is
sufficient for urban journeys in particular.
Avoid short journeys
A cold engine has a very high fuel consumption. The optimum operating temperature is reached
only after driving a few miles. The fuel consumption is above average at very low ambient
temperatures, e.g. in winter ⇒ Fig. 116. Plan journeys economically and combine short distances.
Carry out regular maintenance
Regular maintenance is an essential prerequisite for economical driving and increases the service
life of the vehicle.
Observe the correct tyre pressures
An inadequate tyre pressure does not just mean greater wear, but also increases the rolling
resistance of the tyres and thus the fuel consumption. Use optimised rolling resistance tyres.
Adjust the tyre pressure according to the vehicle load. Observe the information on the tyre pressure
sticker ⇒ Useful information about wheels and tyres
Tyre Pressure Loss Indicator or Tyre Pressure Monitoring System ⇒ Tyre monitoring systems.
Use low viscosity engine oil
Fully synthetic engine oils with a low viscosity decrease frictional resistance in the engine and
spread better and more quickly, especially for cold starts.
Do not drive with unnecessary loads in the vehicle
You can reduce fuel consumption by clearing out the luggage compartment before setting off, for
example by removing empty drink crates or unused child seats.
In order to keep the drag coefficient of the vehicle as low as possible, remove attachments and
add-on parts such as ski, bicycle or roof carriers after use.
Save electrical energy
The alternator is driven by the engine and generates power for convenience consumers such as the
air conditioning system, window heating and ventilation. Saving electrical energy is easy, e.g.:
•At high ambient temperatures, ventilate the car before starting a journey and drive a short
distance with open window. Only then switch on the air conditioning system.
•Switch off convenience systems as soon as they have served their purpose.
Adapt your speed and distance from the vehicles ahead to suit visibility, weather, road
and traffic conditions.
WARNING
Driving through water on roads
First read and observe the introductoryinformation and safety warnings⇒
Introduction
Please follow these rules to help prevent damage to your vehicle when driving through water, for
example if the road is flooded:
•Check the depth of the water before driving through it. The water level must be no higher than
the lower edge of the vehicle body ⇒.
•Do not drive faster than walking speed.
•Never stop the vehicle, reverse or switch off the engine while in water.
•Oncoming vehicles will create waves that could increase the water level for your vehicle to such
an extent that it is not safe to drive through the water.
•Always deactivate the start/stop system manually when driving through water ⇒ Start/stop
system .
Driving with an unlocked or open boot lid can cause serious injuries.
•Always drive with the boot lid closed.
•Always stow all items in the luggage compartment securely. Loose objects can fall out
of the luggage compartment and injure other road users.
•Always drive carefully and ensure that you think ahead.
•Avoid any abrupt or sudden driving and braking manoeuvres as this could cause the
open boot lid to move unpredictably.
•Any objects protruding from the luggage compartment must be marked to ensure that
they are visible to other road users. Comply with legal regulations.
•If items protrude out of the luggage compartment, never use the boot lid to wedge
them into place or hold them in position.
•If you drive with the boot lid open, you must remove any racks and luggage from the
boot lid.
WARNING
Poisonous exhaust fumes could enter the vehicle interior if the boot lid is open. This could
result in loss of consciousness, carbon monoxide poisoning, serious injury and
accidents.
•You should always drive with the boot lid closed in order to prevent poisonous gases
from entering the vehicle.
•If exceptional circumstances require you to drive with an open boot lid, you must do
the following to reduce the amount of poisonous exhaust fumes that could enter into
the vehicle:
- Close all windows and the glass roof.
- Switch off the air recirculation mode of the heating and fresh air system or
switch off the air conditioning system.
- Open all vents in the dash panel.
- Switch the blowers for the heating and fresh air system, or for the air
conditioning system, to the highest setting.
WARNING
The vehicle height, and possibly the length, are different when the boot lid is open.
NOTICE
Fig. 118 To the right of the steering wheel: positions of the vehicle key in the ignition lock.
First read and observe the introductoryinformation and safety warnings⇒
Introduction
When there is no vehicle key in the ignition lock, the steering column lock can be activated.
Vehicle key positions ⇒ Fig. 118
Ignition switched off. The vehicle key can be removed.
Ignition switched on. The steering lock can be released. The diesel engine is pre-heated
and the yellow indicator lamp lights up yellow.
Depress the brake pedal when the indicator lamp lights up green. Start the engine.
Release the vehicle key as soon as the engine starts. Once released, the vehicle key moves
back to position ⇒ Fig. 118①.
m/k/a995MKDepending on the market, in vehicles with a DSG dual clutch gearbox: If
you cannot remove the vehicle key from the ignition lock when the vehicle is stationary, move the
selector lever to position P. If necessary, press the lock button in the selector lever and then
release it.
Starter button
First read and observe the introductoryinformation and safety warnings⇒
Introduction
The starter button replaces the ignition
lock (Press & Drive).
Fig. 119 In the lower section of the centre console: starter button for starting the engine.
The starter button is used to start the vehicle (Press & Drive).
The vehicle can be activated only if there is a valid vehicle key in the vehicle.
When leaving the vehicle, the electronic steering column lock will be activated when the ignition is
switched off and the driver door is opened ⇒ Steering.
Switching the ignition on and off
Press the starter button once without depressing the brake or clutch pedals ⇒.
Careless or unsupervised use of the vehicle key can lead to accidents or injuries.
•Always take all vehicle keys with you every time you leave the vehicle. The engine can
be started and electrical equipment such as the window controls can be operated. This
can cause serious injury.
•Never leave children or people requiring assistance alone in the vehicle when the
vehicle is locked. They could become trapped in the vehicle in an emergency and may
not be able to get themselves to safety. For example, locked vehicles may be subjected
to very high or very low temperatures depending on the season. This can cause
serious injuries and illness or fatalities, especially among small children.
•Never remove the vehicle key from the ignition lock when the vehicle is in motion. The
steering column lock may be activated and you will no longer be able to steer the
vehicle.
•The key bit in the vehicle key needs to be folded out fully and locked in position.
•Only attach light objects weighing under 100 g to the vehicle key.
WARNING
The 12-volt vehicle battery may run down and prevent the motor from restarting if the
ignition is switched on while the engine is switched off.
•Always switch off the ignition before leaving the vehicle.
NOTICE
Automatic ignition switch-off
The ignition switches off automatically after a short time if the driver moves away from the vehicle
with the vehicle key when the ignition is switched on. If the dipped beam headlights were switched
on at the time, the side lights will remain switched on for approximately 30 minutes. The side lights
can be switched off manually ⇒ Lights or by locking the vehicle ⇒ Central and manual locking.
Once the vehicle detects that the driver is absent when the engine stop is active, the ignition will
switched off automatically after a certain period of time.
Automatic ignition switch-off in vehicles with a start/stop system
When all the following conditions are fulfilled at the same time, the vehicle ignition will be switched
off automatically when engine stop is active and when the vehicle is stationary:
•The driver removes their seat belt.
•No pedals are depressed.
•The driver door is opened.
If the ignition is deactivated automatically while the dipped beam headlights are switched on ,
the side lights remain switched on for around 30 minutes.
The side lights can be switched off manually or will go off when the vehicle is locked.
Engine restart function
If no valid vehicle key is detected in the vehicle interior once the engine has been switched off, the
engine can be restarted within approximately 5 seconds. A corresponding message appears on the
instrument cluster display.
After this time, the engine cannot be re-started without a valid vehicle key in the vehicle interior.
Before leaving the vehicle, always switch off the ignition manually and observe any
information shown in the instrument cluster display.
Leaving the vehicle stationary for long periods with the ignition switched on can discharge
the 12-volt vehicle battery so that the engine can no longer be started.
The engine cannot, for example, be started with the starter button if the button cell in the
vehicle key is weak or flat. In this case, use the emergency start function ⇒ Emergency start
function.
Starting the engine
First read and observe the introductoryinformation and safety warnings⇒
Introduction
•m/k/a995MKVehicles with ignition lock: Turn the vehicle key to position ⇒ Fig. 118①.
The ignition is switched on.
•m/k/a995MKVehicles with a starter button: Press the starter button once. The ignition is
switched on.
•m/k/a995MK Vehicles with a diesel engine: During the diesel engine preheating phase,
the indicator lamp in the instrument cluster lights up.
•Depress and hold the brake pedal until the electronic parking brake has been switched off.
•m/k/a995MKVehicles with manual gearbox: fully depress the clutch pedal and hold it
until the engine has been started. Move the gear lever to neutral position.
•m/k/a995MKVehicles with DSG dual clutch gearbox: move the selector lever to
position P or N.
Unintentional vehicle movements can cause serious injury.
•Do not depress the brake or clutch pedal when switching on the ignition as the engine
will then start immediately.
WARNING
Careless or unsupervised use of the vehicle key can lead to accidents or injuries.
•Always take all vehicle keys with you every time you leave the vehicle. Children or third
parties could lock the vehicle, start the engine, switch on the ignition or operate
electrical equipment such as the electric windows.
WARNING
•m/k/a995MKVehicles with ignition lock: Turn the vehicle key to position ⇒ Fig. 118② –
do not depress the accelerator. Release the vehicle key once the engine has started.
•m/k/a995MKVehicles with a starter button: Press the starter button once ⇒ Starter
button – do not depress the accelerator. There must be a valid vehicle key in the vehicle before
the engine can be started. Release the starter button once the engine has started.
•If the engine does not start, stop the start procedure and repeat it after approximately one
minute.
•m/k/a995MK Vehicles with starter button: Jump start the vehicle if necessary
⇒ Emergency start function.
•Switch off the electronic parking brake if you wish to pull away.
Do not warm up the engine by running it while the vehicle is stationary. Instead, pull off as
soon as there is good visibility through the windows. This helps the engine to reach operating
temperature more quickly and reduces emissions.
Components with a high power consumption are switched off temporarily when the engine is
started.
The engine cannot, for example, be started with the starter button if the cell battery in the
vehicle key is weak or flat. In this case, use the emergency start function ⇒ Emergency start
function.
When starting from cold, the engine may be a little noisy for the first few seconds. This is
quite normal, and no cause for concern.
At outside temperatures of less than +5°C (+41°F), fumes may be detected under a vehicle
with a diesel engine if the fuel-powered supplementary heater is switched on.
Stopping the engine
First read and observe the introductoryinformation and safety warnings⇒
Introduction
•Bring the vehicle to a standstill ⇒.
•Park the vehicle ⇒ Parking.
•m/k/a995MKVehicles with ignition lock: Turn the vehicle key to position ⇒ Fig. 118⓪ in
the ignition lock.
Never leave the engine running if you leave the vehicle unattended, particularly not if a
gear or position has been selected. The vehicle could move suddenly or something
unexpected may happen that may cause damage, fire or serious injuries.
WARNING
Start boosters may explode or suddenly cause the engine to run at high revs.
•Never use a start booster.
WARNING
•The starter and the engine can be damaged if you attempt to start the engine while the
vehicle is in motion or if the engine is started again immediately after it has been
switched off.
•When the engine is cold, avoid high engine speeds, driving at full throttle and
overloading the engine.
•Do not push-start or tow-start the vehicle. Unburnt fuel can damage the catalytic
converter.
NOTICE
If the engine does not start, never use the starter with a gear selected and the vehicle key
in the ignition lock in position ⇒ Fig. 118② for driving or tow-starting, e.g. when the fuel
tank is empty. This could cause damage to the starter.
•Fill up fuel if necessary ⇒ Fuel types and refuelling or jump start the vehicle ⇒ Jump
starting.
•If the engine does not start, seek expert assistance.
NOTICE