Mercedes-Benz GL-Class: Important safety notes
Observe the "Important safety notes"
section.
ABS regulates brake pressure in such a way that the wheels do not lock when you brake.
This allows you to continue steering the vehicle when braking.
ABS works from a speed of about 5 mph(8 km/h) upwards, regardless of roadsurface conditions. ABS works on slippery surfaces, even when you only brake gently.
WARNING 
If the ABS malfunctions, other driving systems
such as the BAS or the ESP® are also switched
off. Observe indicator and warning lamps that
may come on as well as messages in the
multifunction display that may appear.
If the ABS malfunctions, the wheels may lock
during hard braking, reducing the steering
capability and extending the braking distance.
The 
warning lamp in the
instrument
cluster lights up when the ignition is switched
on. It goes out when the engine is running.
Braking
If ABS intervenes when braking, you will feel
a pulsing in the brake pedal.
► If ABS intervenes: continue to depress the
brake pedal with force until the braking
situation is over.
► ...
See also:
How to Check Power Steering Fluid
Notice: Extremely small amounts of contamination can cause steering system damage
and cause it to not work properly. Do not allow contaminants to contact the fluid
side of the reservoir cap/ dipstic ...
Overheated Engine Protection Operating Mode
This emergency operating mode lets the vehicle be driven to a safe place in an
emergency situation. If an overheated engine condition exists, an overheat protection
mode which alternates firing gr ...
Hazard Warning Flashers
(Hazard Warning Flashers):
Press this button located on top of the steering column, to make the front and
rear turn signal lamps flash on and off. This warns others that you are having trouble.
...
