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266 Driving mode
Shunting level is deactivated automatically in the
following cases:
The chassis is lowered or raised manually.
R
Raised or normal driving level is set.
R
The T button on the control panel or the
R
¤ button on the instrument panel is
pressed.
Additional axles
Notes about starting-off aid
* NOTE Damage to tyres and axles due to
long use of the starting-off aid
The starting-off aid is only intended for short-
term use when wheels are spinning on slip‐
pery road surfaces.
When the starting-off aid is switched on, the
axle load of the rear axle increases.
Prolonged use can damage the rear axle and
the wheels.
Make sure that the starting-off aid is
#
only switched on for a short time.
The starting-off aid can also be fitted with a limit
speed or a time limit (reactivation lockout).
If the starting-off aid has no time limit, make sure
that the starting-off aid is only switched on for a
short time.
The starting-off aid with limit speed switches
itself off automatically at a speed above
30 km/h. The starting-off aid can only be
switched on again at a speed below 30 km/h.
The starting-off aid with reactivation lockout
switches itself off automatically after 90 sec‐
onds. After 50 seconds, the starting-off aid with
reactivation lockout can be switched on again.
The starting-off aid without reactivation lockout
switches itself off automatically after 120 sec‐
onds and can be switched on again immediately.
Switching the starting-off aid on/off
To switch on the starting-off aid: in the
#
Controls
menu of the multimedia system,
select the
Switch
menu item.
Press the å button in the multimedia sys‐
#
tem.
As long as the starting-off aid is switched on,
the indicator lamp å in the status area
lights up yellow.
%
If the starting-off aid has no time limit, stop
the starting-off aid manually after a short
time.
To stop the starting-off aid manually: press
#
the å button again.
or
Press the T button on the operating unit of
#
the level control system (
Raising/lowering leading/trailing axles
+
ENVIRONMENTAL NOTE Reduction of
rolling resistance by raising the leading/
trailing axle
When the leading/trailing axle is raised, the
rolling resistance is reduced.
This reduces tyre wear and fuel con‐
#
sumption.
%
The leading/trailing axle is lowered shortly
before the permissible axle load is reached.
Observe the instructions in the "Axle and
wheel loads" section (
/
the vehicle identification plate
(
page 384).
/
In vehicles for large capacity transport, the trail‐
ing axle can only have its load reduce, it cannot
be raised.
Vehicles with steerable trailing axle: when the
additional axle is raised, the wheels steer in a
straight-ahead position. When the additional axle
is lowered again, the wheels co-steer again.
Switch on the ignition.
#
If the supply pressure in the compressed-air
#
system is too low, leave the engine running.
If the vehicle is empty or only partially laden,
#
raise the leading/trailing axle before pulling
away.
Vehicles with rear loading crane body: before
#
raising the leading/trailing axle, refer to the
operating manual of the body manufacturer.
When loading or unloading the vehicle, lower
#
the leading/trailing axle.
Raise/lower: in the
Controls
#
multimedia system,
Switch
the â button.
When the leading/trailing axle is raised, the
indicator lamp ¡ (trailing axle) or }
(leading axle) in the status area lights up yel‐
low.
/
page 261).
page 227) and on
menu of the
menu item, press
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