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Auxiliary heating
Information about auxiliary heating
& DANGER Risk of fatal injury due to poi‐
sonous exhaust gases
If the tailpipe is blocked or sufficient ventila‐
tion is not possible, poisonous exhaust gases
such as carbon monoxide may enter the vehi‐
cle. This is the case in enclosed spaces or if
the vehicle gets stuck in snow, for example.
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 fire due to hot station‐
ary heater components and exhaust
gases
Flammable materials such as leaves, grass or
twigs may ignite.
When the stationary heater is switched
#
on, make sure that:
hot vehicle parts do not come into
R
contact with flammable materials.
the exhaust gas can flow out of the
R
stationary heater exhaust pipe
unhindered.
the exhaust gas does not come into
R
contact with flammable materials.
The heater for the auxiliary heating is fitted at the
front of the vehicle underbody. The emissions
outlet is on the left side of the vehicle below the
front door.
& WARNING Risk of poisoning during work
on the auxiliary warm-air heater
If work on the heat exchanger of the auxiliary
warm-air heater is not performed correctly,
exhaust fumes could leak into the passenger
compartment.
Have all work on the auxiliary warm-air
#
heater carried out at a qualified special‐
ist workshop.
If you are transporting hazardous materials, com‐
ply with the relevant safety regulations. Place
objects a sufficient distance from the auxiliary
heating outlet opening.
* NOTE Damage to the auxiliary heating
due to overheating
If the flow of hot air is blocked, the auxiliary
heating may overheat and switch off.
Do not block the flow of hot air.
#
* NOTE Battery discharge caused by sta‐
tionary heater or stationary ventilation
operation
Operating the stationary heater or stationary
ventilation drains the battery.
After heating or ventilating the vehicle
#
twice, drive for a longer period of time.
Your vehicle may be equipped with either a hot-
water auxiliary heater or an auxiliary warm-air
heater.
The hot-water auxiliary heater is adjusted and
operated using the & rocker switch on the cli‐
mate control system control panel and via the
multimedia system or by remote control.
The auxiliary warm-air heater is adjusted and
operated via the switch clock on the lower centre
console or by remote control
Hot-water auxiliary heater
Function of the hot-water auxiliary heater
Observe the notes on auxiliary heating
(
page 129).
/
The hot-water auxiliary heater complements your
vehicle's climate control system and has a heater
booster, stationary heater and stationary ventila‐
tion function. In addition, the auxiliary heating
system heats the engine coolant to protect the
engine and save fuel during the warming-up
phase. The stationary heater heats the air in the
vehicle interior to the set temperature. It is not
dependent on the heat output of the running
engine.
The stationary heater is operated directly using
the vehicle's fuel. For this reason, the fuel tank
must be filled above the reserve level so that the
stationary heater can work.
The stationary heater automatically adjusts its
operating mode to changes in outside tempera‐
Climate control 129
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