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Controls in detail
Auxiliary heating/ventilation*
3
̄ Auxiliary heating/ventilation*
The auxiliary heating heats or ventilates
the interior to a temperature that you have
set. The auxiliary heating can be operated
with the engine switched on or off.
The auxiliary heating is equipped with a
water heater.
The auxiliary heating heats the coolant and
the vehicle interior and is therefore more
favorable to the engine and consumes less
fuel. The fuel tank must be at least a quar-
ter full to ensure that the auxiliary heating/
ventilation operates correctly.
The maximum heating period is
60 minutes.
You can use the auxiliary heating/ ventila-
tion to:
ț ventilate or preheat the vehicle interior
and to de-ice the windows
ț start the engine better in cold weather
ț support the vehicle’s heating system
while the engine is running and outside
temperatures are low (heater booster
function) (୴ page 137)
You can use the operating system to define
up to three switch-on times, one of which
can be selected to switch on the auxiliary
heating/ventilation (୴ page 142).
Warning G
Exhaust fumes are produced while the auxilia-
ry heating is in operation. For this reason,
switch off the auxiliary heating in enclosed
spaces without an extraction system, e.g. a
garage.
Operation of the auxiliary heating system is
prohibited at gas stations or when refueling
your vehicle. The auxiliary heating must there-
fore be switched off at refueling stations.
Warning G
Observe the relevant safety regulations in the
case of vehicles used for the transport of haz-
ardous goods.
Aerosols, gas cartridges and other pressur-
ized containers transported in the vehicle may
be highly flammable and could explode when
heated.
Make sure that the containers described are
kept away from the flow of hot air from the
auxiliary heating.
Otherwise, you could endanger yourself and
others.
i
The auxiliary heating automatically
switches to heater booster mode after
the engine is started.