Mercedes-Benz Actros 2017, Operating Instructions Manual

Page: 341 / 436

X Switch off all electrical consumers (e.g. radio,
blower).
X
At outside temperatures below −20 † and on
vehicles with an auxiliary heater (auxiliary
heater for cab and engine, 9 kW): preheat the
engine with the auxiliary heater before start-
ing the engine (
Y
page 125).
X
At outside temperatures below −30 † on
vehicles with a coolant preheater: preheat the
engine using the coolant preheater for at least
90 minutes.
X
Switch the ignition lock to the drive position.
X Observe the outside temperature shown in
the display (
Y
page 130) and watch out for
signs of low on-board voltage, e.g. the vehicle
lights are weak.
X Shift into neutral.
X Disengage power take-off (
Y
page 343).
X
Start the engine.
In vehicles with automated manual transmis-
sions, the clutch is opened automatically at
temperatures of −5 † or below in order to
make it easier to start the engine.
X
Release the Start/Stop button once the
engine has started.
The idling speed is controlled automatically.
If the engine does not start:
i The starting procedure is automatically can-
celled:
R
after approximately 60 seconds on vehicles
with the OM 936 engine
R
after approximately 40 seconds on vehicles
with the OM 470, OM 471 or OM 473
engine
X
Switch the ignition lock to position 0.
X
Repeat the starting procedure after approx-
imately 1 minute.
X After three starting attempts, wait approx-
imately 3 minutes before trying again.
X
If the reservoir pressure in the brake system
(
Y
page 148) has fallen below 6 bar, charge
the compressed-air system (
Y
page 394).
This ensures that the clutch opens when start-
ing the engine in vehicles with automated
manual transmission.
Driving in extremely cold conditions
Observe the following at outside temperatures
below −20 †:
R
Before pulling away, check the reservoir pres-
sure in the brake system (
Y
page 148).
Do not pull away until there is sufficient res-
ervoir pressure.
R
Before pulling away, check that the steering is
sufficiently warm. Only then is the operating
efficiency of the steering ensured.
Hydraulic steering operation may be restric-
ted at outside temperatures below −25 †.
R
Shift gear early and avoid high engine speeds.
R
Avoid putting the engine under excessive load
when pulling away.
R
Avoid running the engine for brief periods.
R
Warm the vehicle up for around 20 minutes
before increasing the load.
R
For technical reasons, the engine brake is
only available from an oil temperature of 15 †
at level 1.
The full engine braking effect is only available
across the entire engine speed range from an
oil temperature of 60 †.
R
The battery can only be charged at a certain
rate per hour, regardless of the power output
of the alternator. The rate of charge is signif-
icantly reduced by low outside temperatures.
As a result, the battery may take much longer
to charge in winter.
Parking in extremely cold conditions
If the vehicle is parked at outside temperatures
of below −30 †, it cannot be guaranteed that
the engine will start, even with the cold climate
package. Mercedes-Benz advises against park-
ing the vehicle outdoors at outside tempera-
tures of below −30 †.
Observe the following if the vehicle has to be
parked outdoors at extremely low tempera-
tures:
X If necessary, ensure adequate vehicle lighting
by using external lighting, e.g. warning lamps.
X
Check the fuel level on the fuel gauge
(
Y
page 129).
X If the fuel level is down to the reserve level, fill
up the fuel tank (
Y
page 315).
i You may have to bleed the fuel system if the
fuel level is too low for longer periods
(
Y
page 376).
Winter operation
339
Driving mode
Z