Mercedes-Benz GLS Owner's Manual page 186

Stationary heater/ventilation
Stationary heater/ventilation function
The air inside the vehicle is heated or ventila‐
R
ted to the set temperature.
The air inside the vehicle cannot be cooled
R
down to temperatures below the outside
temperature.
If the outside temperature changes, ventila‐
R
tion mode automatically switches to heating
mode or heating mode automatically
switches to ventilation mode.
The stationary heater and the exhaust gas outlet
are situated behind the right-hand front wheel.
Switching the stationary heater/ventilation
on/off via the operating unit
& 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.
Climate control 183
the exhaust gas does not come into
R
contact with flammable materials.
* 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.
Requirements:
The fuel tank is sufficiently full.
R
% Please note that if the tank fill level is too
low, it can result in function restrictions dur‐
ing auxiliary heating operation.
Set the desired temperature using the w
#
button.
Press the & button.
#
The red or blue indicator lamp on the &
button will light up or go out.