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Defrosting the windscreen
First read and observe the introductory information given on page 91.
Switching on
›
Press the button
» Fig. 92
1
›
» Fig. 92
on page 91.
11
Switching off
›
Press the button
» Fig. 92
1
.
AUTO
›
» Fig. 92
on page 91 again.
11
The temperature control is controlled automatically. More air flows out of the air
outlet vents 1 and 2
» Fig. 88
on page 85.
Auxiliary heating (auxiliary heating and ventilation)
Introduction
This chapter contains information on the following subjects:
Switching directly on/off
Auxiliary heating (parking heating)
The auxiliary heating (auxiliary heating) functions in connection with the air-con-
ditioning system or Climatronic.
It can be used when stationary, when the engine is switched off to preheat the
vehicle and while driving (e.g. during the heating phase of the engine).
The engine is also preheated, if the auxiliary heating is switched on when the ve-
hicle is stationary and the engine is switched off.
The auxiliary heating (parking heating) warms up the coolant by combusting fuel
from the vehicle tank. The coolant warms up the air, which (if the blower speed is
not set to zero) flows into the passenger compartment.
94
Using the system
on page 91.
on page 91 again or press the button
Auxiliary ventilation
The auxiliary ventilation enables fresh air to flow into the vehicle interior by
switching off the engine, whereby the interior temperature is effectively de-
creased (e.g. with the vehicle parked in the sun).
WARNING
The auxiliary heating (parking heating) must never be operated in closed
■
rooms - risk of poisoning!
The auxiliary heating (parking heating) must not be allowed to run during re-
■
8
fuelling - risk of fire.
The exhaust pipe of the auxiliary heating is located on the underside of the
■
vehicle. Therefore, if you wish to operate the auxiliary heating, do not park the
vehicle in such a way that the exhaust gases from the auxiliary heating can
come into contact with highly flammable materials (e.g. dry grass) or easily in-
flammable substances (e.g. spilt fuel) - risk of fire.
Note
If the auxiliary heating runs, the fuel consumption comes from the vehicle tank.
■
The auxiliary heating automatically controls the filling level in the fuel tank. If only
a low quantity of fuel is present in the fuel tank, the function of the auxiliary
heating is blocked.
The exhaust pipe of the auxiliary heating, which is located on the underside of
■
95
the vehicle, must not be clogged and the exhaust flow must not be blocked.
95
If the auxiliary heating and ventilation is running, the vehicle battery discharges.
■
96
If the auxiliary heating and ventilation has been operated several times over a
96
longer period, the vehicle must be driven a few kilometres in order to recharge
the vehicle battery.
The auxiliary heating only switches the blower on, if it has achieved a coolant
■
temperature of approx. 50 °C.
At low outside temperatures, this can result in a formation of water vapour in
■
the area of the engine compartment. This is quite normal and is not an operating
problem.
After switching off the auxiliary heating, the coolant pump runs for a short peri-
■
od.
The auxiliary heating and ventilation does not switch on or comes on, if the ve-
■
hicle battery indicates a low loading state
tion.
The auxiliary heating (parking heating) does not switch on, if the following was
■
shown in the information display or before switching off the ignition: Please re-
fuel.
» page
204, Automatic load deactiva-
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