Mercedes-Benz Actros 2017, Operating Instructions Manual

Page: 244 / 436

Release valve on the compressed-air reservoir
X
Start the engine.
X
Check the reservoir pressure in the
compressed-air brake system.
X If the on-board computer displays the red
Brake supply pressure in circuit 1
too low
and/or
Brake supply pressure
in circuit 2 too low
event window, leave
the engine running until the red event window
goes out.
The compressed-air system is charged.
X Switch off the engine.
X
Pull ring
;
on drain plug
:
and drain off the
condensation.
X If a large amount of condensation runs out,
have the compressed-air brake system
checked at a qualified specialist workshop.
Vehicles with condensation monitoring:
X
If the system detects that the number of
regeneration phases performed is insuffi-
cient, the yellow
+
Condensation in
compressed-air reservoir
event window
is displayed in the on-board computer.
Checking the vehicle height
Vehicles with level control: when driving with a
lowered or raised chassis, the driving and brak-
ing characteristics may be affected. Addition-
ally, the maximum permitted vehicle height may
be exceeded when the chassis is raised.
Observe the legally permissible vehicle heights
for the country you are currently in.
If the yellow
¸
indicator lamp lights up in the
instrument cluster, the chassis is not at driving
level.
X Set the driving level (
Y
page 298).
The
¸
indicator lamp in the instrument
cluster goes out.
Pulling away
! Do not pull away as soon as the engine
starts. Let the engine run in neutral for a short
time after starting, until there is sufficient
engine oil pressure. Do not drive at high
engine speeds when the engine is cold.
This will prevent excessive wear and possible
engine failure.
! Do not hold the steering wheel for longer
than 10 seconds with the steering at full lock.
Otherwise, the power steering assistance
could malfunction.
Do not turn the steering wheel forcefully if the
wheels are resting on the curb or other similar
surfaces. Otherwise, the power steering
assistance could be damaged.
You should pay special attention to road condi-
tions when temperatures are around the freez-
ing point.
There is a delay in displaying a change in outside
temperature.
If the brake system is defective, braking behav-
iour may change or the brake system may fail. If
you notice a reduction in braking power when
testing the brakes, stop the vehicle as soon as
possible while paying attention to traffic condi-
tions. Have the brake system checked and
repaired at a qualified specialist workshop.
Always pay attention to the information in the
event window, which is shown by the on-board
computer if the brake system is malfunctioning.
In addition, an indicator lamp lights up in the
instrument cluster or the status area of the on-
board computer and a warning tone may sound.
Braking behaviour may change. The pedal travel
and pedal force required to brake the vehicle
may increase.
If you ignore warning lamps and messages in the
display, you will not recognise failures and faults
affecting the brake system components and
systems. Braking behaviour may change. The
pedal travel and pedal force required to brake
the vehicle may increase. Have the brake sys-
tem checked and repaired at a qualified spe-
cialist workshop. Always pay attention to the
warning lamps and messages in the display.
Vehicles with an automated manual transmis-
sion and without a hydrodynamic clutch: the
vehicle has a selectable crawler mode. When
crawler mode is activated, the vehicle crawls
automatically when the service brake is
released and continues rolling at the engine
242
Driving
Driving mode