237
Controls in detail
Auxiliary heating/ventilation*
3
The auxiliary heating heats the coolant
and the vehicle interior and is therefore
more favorable to the engine and con-
sumes less fuel. The fuel tank must be at
least a quarter full to ensure that the
auxiliary heating/ventilation operates
correctly.
The maximum heating period is
60 minutes.
You can use the auxiliary heating/ ven-
tilation to:
ventilate or preheat the vehicle inte-
rior and to de-ice the windows
start the engine better in cold weath-
er
support the vehicle’s heating system
while the engine is running and out-
side temperatures are low (heater
booster function) (
page 234)
You can use the operating system to de-
fine up to three switch-on times, one of
which can be selected to switch on the
auxiliary heating/ventilation
(
page 240).
You can switch the auxiliary heating/
ventilation on and off immediately using:
the auxiliary heating/heater booster
switch (
page 238)
the auxiliary heating remote control*
(
page 239)
i
The auxiliary heating automatically
switches to heater booster mode af-
ter the engine is started.
!CAUTION
Switch on the auxiliary heating at reg-
ular intervals (at least once a month)
for approximately 10 minutes.
Make sure that the hot air flow is not
obstructed. The auxiliary heating
would otherwise overheat and switch
off.
nf_BA.book Page 237 Friday, January 25, 2008 3:53 PM
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