Adjusting the head restraints
Fig. 88 Adjusting the front head restraints: without longitudinal adjustment, with longitudinal 
adjustment.
Fig. 89 Rear head restraint: adjusting.
First read and observe the introductoryinformation and safety warnings⇒
Introduction
Adjusting the height of the head restraint
•Press the button ⇒ Fig. 88① or ⇒ Fig. 89① if necessary and slide the head restraint up or 
down in the direction of the arrow ⇒.
•The head restraint must click securely into position.
Adjusting front head restraint in longitudinal direction
•Push the head restraint forwards in the direction of the arrow or press button ⇒ Fig. 88①
and push it backwards.
•The head restraint must click securely into position.
Removing and fitting head restraints
Driving without head restraints or with incorrectly adjusted head restraints increases the 
risk of severe or fatal injuries in the event of an accident or sudden driving or braking 
manoeuvre.
•If a seat is occupied, the head restraint for that seat must be fitted and adjusted 
correctly.
•Each vehicle occupant must adjust the head restraint to suit their body size, to help 
reduce the risk of neck injuries in an accident. As far as possible, the upper edge of the 
head restraint must be level with the top of the head, but not lower than eye level. 
Position the back of your head in the middle and as close to the head restraint as 
possible.
•Never adjust the head restraint when the vehicle is in motion.
WARNING
When removing or fitting head restraints, make sure that they do not hit the roof, the front 
seat backrest or other parts of the vehicle. This will prevent damage from occurring.
NOTICE 
 – 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 (Climatronicyf
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