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Always switch the stationary heater off
#
in enclosed spaces without an air
extraction systems, e.g. in garages.
Keep the tailpipe and the area around
#
the vehicle free from snow when the
engine or the stationary heater are run‐
ning.
Open a window on the windward side of
#
the vehicle to ensure an adequate sup‐
ply of fresh air.
& WARNING Risk of burns from the
exhaust pipe during work on the auxiliary
heating
If the auxiliary heating has been switched on,
you could suffer burns from the hot exhaust
pipe.
Allow the exhaust pipe to cool down
#
before you start work on the auxiliary
heating.
* NOTE Damage to the auxiliary heating
If the auxiliary heating is not used for an
extended period of time, it can be damaged.
Switch the auxiliary heating on for
#
around ten minutes at least once a
month.
If you do not use the auxiliary heating for an
extended period, deposits may form in the fuel
system of the auxiliary heating due to exposure
to heat and condensation. These deposits can
cause malfunctions in the auxiliary heating. Have
the auxiliary heating checked and repaired at a
qualified specialist workshop before you use it
again.
Operate the auxiliary heating only with commer‐
cially available diesel fuel. Operation with 100%
fatty acid methyl ester (FAME) fuel or diesel fuel
with more than 10% of fatty acid methyl ester
(FAME) fuel as an additive will cause malfunctions
and is therefore not permitted. If the vehicle is
operated with one of these fuel types, you will
need an additional fuel tank for commercially
available diesel fuel for the auxiliary heating.
The auxiliary heating operates independently of
the engine and supplements the vehicle's heat‐
ing. To support the heating (heater booster func‐
tion), you can also switch the auxiliary heating on
when the engine is running and outside tempera‐
tures are low.
Depending on the vehicle's equipment, the fol‐
lowing options are available for controlling the
auxiliary heating:
The
Climate control
menu in the multimedia
R
system (
page 108)
/
The bed/berth switch panel
R
The auxiliary heating heats the cab. If your vehi‐
cle is equipped with engine preheating, the auxili‐
ary heating can also heat the coolant. Engine pre‐
heating therefore also has the effect of sparing
the engine and saving fuel. You can switch the
auxiliary heating on or off manually or define up
to two switch-on times.
If you switch the auxiliary heating on manually or
via the switch-on times, residual heat utilisation
(
page 110) will be switched off automatically.
/
Forced switch-off
In auxiliary heating mode, use the battery discon‐
nect switch only in cases of danger. If the heater
is switched off without run-on, it may be dam‐
aged.
In vehicles used for transporting hazardous
goods, you must switch off the heater before
entering a danger zone (e.g. a refinery).
For safety reasons, you cannot set any switch-on
times for these vehicles and can switch on engine
preheating only with the immediate heating
mode.
If you switch off the engine or switch on a power
take-off, the heater will switch off automatically.
The combustion-air blower will continue to run for
a short time after engine shutdown and then shut
off automatically.
Climate control 111
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