G
WARNING
When the auxiliary heating is switched on,
parts of the vehicle can become very hot, e.g.
the exhaust system.
Flammable materials such as leaves, grass or
twigs may ignite if they come into contact
with:
R
hot parts of the exhaust system
R
the exhaust gas itself
There is a risk of fire.
When the auxiliary heating is switched on,
make sure that:
R
no flammable materials come into contact
with hot vehicle components
R
the exhaust gas can escape from the
exhaust pipe unhindered
R
the exhaust gas does not come into contact
with flammable materials.
!
Turn on the auxiliary heating at least once a
month for approximately 10 minutes. The
auxiliary heating could otherwise be dam-
aged.
!
Make sure that the flow of hot air is not
blocked. The auxiliary heating will otherwise
overheat and switch off.
Your vehicle may be equipped with either an
auxiliary hot-water heater or an auxiliary warm-
air heater. Adjustment and operation of the:
R
hot-water auxiliary heater is done via the on-
board computer and with the auxiliary heating
button in the control panel (
Y page 108) or
with the remote control (
Y page 109).
R
auxiliary warm-air heater is done via the timer
above the overhead control panel
(
Y page 114).
The auxiliary heating works independently of the
engine and supplements the climate control
system in the vehicle. The auxiliary heating
heats the air in the vehicle interior to the tem-
perature set.
If your vehicle is equipped with a hot-water aux-
iliary heater, the auxiliary heating also keeps the
coolant warm. This way, the load on the engine
is minimized and fuel is saved.
The heater booster function (
Y page 111) of the
auxilia
ry heating supports the climate control
system when the engine is running and the out-
side temperature is low.
You can use the auxiliary heating at an outside
temperature of up to 39 ‡ (4 †). At an outside
temperature above 39 ‡ (4 †) the auxiliary
heating system and the heater booster function
switch off automatically.
Hot-water auxiliary heating
Heating time
The heating time when operating the auxiliary
heating with the vehicle is stationary without the
engine running depends on the outside temper-
ature and the electrical consumers switched on.
Outside
tempera-
ture
Heating
time
Possible startup
procedures
Above
23 ‡
(Ò5 †)
Approx.
20 minutes
6
23 ‡
(Ò5 †) to
5 ‡
(Ò15 †)
Approx.
40 minutes
3
Below 5 ‡
(Ò15 †)
Approx.
50 minutes
2
You can then switch on the auxiliary heating
again.
If you do not start the engine for a while, the total
duration of heating is limited to a maximum of
120 minutes to protect the starter battery.
Switching on the auxiliary heating is then auto-
matically disabled. You can, for example, switch
on the auxiliary heating without the engine run-
ning if the outside temperature is Ò5 ‡(Ò20 †) a
maximum of two times. If you try it again, the
indicator lamps in the y button
(
Y page 108) flash alternately for approximately
2 minutes to signal switch-on interlock. The aux-
iliary heating cannot be switched on without
starting the engine.
When the condition of charge of the starter bat-
tery is sufficient again, the switch-on interlock
will be deactivated. To charge the starter bat-
tery, let the engine run. The engine run time
required to reach the necessary condition of
charge depends on the outside temperature and
on the electrical consumers switched on.
Operating the auxiliary heating system
107
Climate control
Z
To Next Page
Loading...
Need help?
General
