Important safety notes
WARNING 
For reasons of safety, have the NECK-PRO
head restraints/NECK-PRO luxury head
restraints checked at an authorized
Mercedes-Benz Center after a rear-end
collision.
WARNING
When pushing back the NECK-PRO head
restraint cushion, make sure your fingers do
not become caught between the head
restraint cushion and the cover. Failure to
observe this could result in injuries.
See also:
Vehicles with automatic transmission
Apply the electric parking brake.
Shift the transmission to position P.
Using the SmartKey
Turn the SmartKey to position 0 in the
ignition lock and remove it.
The immobilizer is activated.
...
Refrigerant of the air-conditioning system
The air-conditioning system is filled with
R134a refrigerant and a special PAG
lubricant.
Never use refrigerant R 12 (CFC)
or
mineral lubricants. Otherwise, you could
damage the air-condit ...
Adjusting the head restraint height electrically
To adjust the head restraint
height: slide
the switch for head restraint adjustment
up or down in the direction of
the arrow. ...