Mercedes-Benz GL-Class: Refrigerant of the air-conditioningsystem
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-conditioning system.
Engine oil viscosity
Viscosity describes the flow characteristics
of a fluid. If an engine oil has a high viscosity,
this means that it is thick; a low viscosity
means that it is thin.
Select an engine oil with an S ...
Brake fluid
WARNING
The brake fluid constantly absorbs moisture
from the air; this lowers its boiling point.
If the boiling point of the brake fluid is too low,
vapor pockets may form in the brake ...
See also:
Switching the windshield wipers on/off
WARNING
Wiper blades are components that are subject
to wear and tear. Replace the wiper blades
twice a year, preferably in the spring and fall.
Otherwise the windows will not be wiped ...
Moonroof
WARNING
► In an accident you could be thrown from
the vehicle through an open moonroof.
Always use seat belts and child restraints.
► Do not allow anyone to stand up or
extend a ...
Adaptive Forward Lighting (AFL)
Vehicles with the Adaptive Forward Lighting System (AFL) have headlamps that
swivel to the left or right when making a turn to provide better lighting. To enable
AFL, set the exterior lamp switch ...






